Property of American Airlines Operator Manual...operation and maintenance manual tlc 818-144so...

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Operator Manual

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OPERATION AND MAINTENANCE MANUAL TLC 818-144SO CONTAINER/PALLET LOADER

CHAPTER ONE, SECTION 2: OPERATOR INSTRUCTIONS

A. General Information

WARNING: DO NOT ATTEMPT TO OPERATE THIS LOADER UNTIL YOU HAVE BEEN TRAINED AND AUTHORIZED TO DO SO.

WARNING: THIS LOADER WAS NOT DESIGNED TO TRANSPORT CARGO. TRANSPORTING CARGO WITH IT MAY RESULT IN INJURY TO PERSONNEL AND DAMAGE TO THE EQUIPMENT.

A.1 control Locations

All driving and loading operations are controlled from the operator's station, which is located on the right side of the bridge platform. The station has two control positions. DRIVE mode operations are controlled from the DRIVE Control Panel, where the driver faces the front of the loader. LOAD mode operations are controlled from the LOAD Control Panel, where the operator faces the rear of the loader.

A.2 Aircraft Compatibility

The TLC 818 Loader services the following aircraft:

Loader Model

TLC 818-144 (144 In. (366 em) Door Sill Height)

TLC 818-218 (218 In. (554 em) Door Sill Height)

125" Wide Option

Aircraft Model Main Deck

707' 727' 737 DC-8, DC-9

707' 727' 737 747, 757, 767 DC-8, DC-9, DC-10, L-1011, A-300, A-310, A-320

Aircraft Model Lower Lobe

747, 757, 767, DC-10, L-1011, (Including "500"), A-300, A-310, A-320

747, 757, 767, DC-10, L-1011, (Including "500"), A-300, A-310, A-320

747, 767 With 125 Inch Wide Cargo Door.

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OPERATION AND MAINTENANCE MANUAL TLC 818-14480 CONTAINER/PALLET LOADER

The loader may handle the following containers:

LD-1 through LD-11, 88 x 125 pallets 96 x 125 pallets

B. Operator Maintenance Checks

The following maintenance checks should be made daily before operating the loader.

B.1 Hydraulic Reservoir Oil Level Gauge

The Hydraulic Reservoir Oil Level Gauge is mounted on the Front of the hydraulic reservoir, which is at the left end of the engine compartment. Hydraulic fluid level should be maintained near the top of the gauge with the elevator and bridge in the "down" position.

B.2 Engine Fluid Checks

Check that the coolant and engine oil are at the proper level.

Check that the battery electrolyte is at the proper level.

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C. DRIVE Mode

c.1. DRIVE Mode control/Indicator Locations

3

9

This section gives the location of the controls and indicators used in the DRIVE mode. The Driver standing at the Drive Control Panel is on the right side of the Bridge facing toward the front of the loader.

DRIVE CONTROL PANEL

1. Ignition/Starter Switch 9. Bridge Up/Down Switch 2. Emergency Stop Switch 10. Panel Lamps On/Off sw. 3. Engine Temperature Gauge 11. Spot Lamps On/Off Switch 4. Engine Oil Pressure Gauge 12. Head Lamps On/Off switch 5. Engine/Battery volt meter 13. Back-up Lamps On/Off Sw. 6. Fuel Gauge 14. Green Lamp, Drive Mode 7. Drive Selector Switch 15. Red Lamp, Load Mode 8. Stabilizers Up/Down switch

4 2 5

0 0

a a 6

0 0

13

7

FIG. 1: DRIVE CONTROL PANEL

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c.1.a DRIVE Mode Indicators and Gauges (See Fig. 1)

c.1.a.1 Indicator Lamp Locations

c.1.a.2

C.1.b

C.1.b.1

C.1.b.2

C.1.b.3

The red LOAD Mode Lamp (Item 15) and the green DRIVE Mode Lamp (Item 14) are at the lower right of the DRIVE Control Panel. The LOAD Lamp is illuminated when the stabilizers are fully extended (DOWN) . The DRIVE Lamp is illuminated when the stabilizers are fully retracted (UP).

Meter and Gauge Locations

The Engine Oil Pressure Gauge (PRESS) (Item 4) and the Engine Coolant Temperature Gauge (TEMP) (Item 3) are at the upper left of the DRIVE Control Panel.

The Voltmeter (VOLT) (Item 5), which indicates the condition of the battery and the charging system, and the Fuel Quantity Gauge (FUEL) (Item 6) are located on the upper right side of the DRIVE Control Panel.

DRIVE Mode Control Panel controls (See Fig. 1)

Ignition/Starter Switch (Item 1)

The Ignition Switch is a four-position switch located on the left side of the DRIVE Control Panel. An (Optional) keyed ignition switch may be installed on specified loaders.

stabilizer Control switch (STAB) (Item 8)

This three-position switch, on the lower left side of the DRIVE Control panel, is spring loaded to the OFF (center) position.

Drive Selector switch (Item 7)

The Drive Selector Switch is a three-position toggle switch on the right side of the DRIVE Control Panel above the mode lamps. This Switch MUST be lifted when being toggled. Moving the switch up (F) puts the loader in FORWARD drive. Moving the switch down (R) puts the loader in REVERSE drive. The Middle position (N) puts the loader in NEUTRAL.

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C.1.b.4

C.1.b.S


steering Wheel and Pedals

The steering wheel operates the power steering system.

The accelerator pedal is the right pedal, beneath the DRIVE Control Panel. Pressing it increases vehicular speed. Releasing it results in a Dynamic Braking action.

The brake pedal is the left pedal, beneath the DRIVE Control Panel. Press the brake pedal to apply the hydraulic disc brake on the loader drive wheel.

Lamps and Signal Controls/Indicators (See Fig. 1)

The Ignition Switch must be in the ON position when using Lamps and Signal Controls/Indicators.

The HEAD LAMP switch (Item 12) is a two-position toggle switch located on the right side of the DRIVE Control Panel. Moving the switch UP turns ON the Headlamps and Taillamps.

The PANEL LAMP switch (Item 10), is a two-position toggle switch located at the center of the DRIVE Control Panel. Moving the switch UP turns ON all Instrument and Control Panel Lamps.

The Optional Turn Signal/Hazard Lamps Operating Lever is mounted on the steering wheel column. Moving the lever in the direction the steering wheel is turned, flashes the lamps at the front and rear of the loader on that side. Pull UP on the metal plate at the base of the operating lever to flash lights at all four corners of the loader simultaneously.

The BACKUP LAMP switch (Item 13) is a two-position toggle switch located on the right side of the DRIVE Control Panel. Moving the switch up turns ON the Backup Lamps.

The SPOT LAMP switch (Item 11) is a two-position toggle switch located at the center of the DRIVE Control Panel. Moving the switch up turns ON the Spotlamps.

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C.2. DRIVE Mode Emergency Control Locations

c.2.a Ignition switch (See Fig. 1, Item 1)

C.2.b

C.2.c

The Ignition switch is the master control switch. If a fluid leak develops or the loader does not stop when the throttle is released, turn the Ignition/Starter switch OFF.

Emergency stop Button (See Fig. 1, Item 2)

There are two RED Emergency Stop Buttons, one button is at the top center of the LOAD control Panel. The other is located on the electrical box on the left side of the loader. Pushing either button stops the engine and cuts all power.

Stabilizer Emergency Hand Pump/Valve (See Fig. 2)

The emergency hand pump is on the hydraulic plate on the right side of the loader, behind the right stabilizer cylinder. The emergency retraction valve is next to the pump. The pump may be used to raise the stabilizers in the event of a hydraulic system failure.

STABILIZER HAND PUMP

EMERGENCY RETRACTION

FIG. 2: STABILIZER HAND PUMP

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c. 2 .d

c.2.e


Emergency Drive switch (See Fig. 3)

The Emergency Drive Switch is located inside the Electrical Enclosure Box, which is at the left side of the loader. The Emergency Drive Switch routs power directly to the Drive Selector switch, allowing the loader to be driven Forward or Reverse in the event of system failure.

FIG. 3: EMERGENCY DRIVE SWITCH

Propulsion Bypass Valve (See Fig. 4)

EMERGENCY DRIVE SWITCH

OPTIONAL

The Propulsion Bypass Valve, which must be opened before the loader is towed, is located on the upper rear frame crossmember weldment below the bridge.

PROPULSION BYPASS VALVE

FIG. 4: PROPULSION BYPASS VALVE

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C.3. DRIVE Mode operator Instructions

C.3.a. General Information

The loader is protected by interlocks in the control system against improper operation which could result in injury or damage. The Stabilizers cannot be raised (shifting the loader into the DRIVE Mode) unless the Elevator Platform is completely lowered. The Stabilizers cannot be lowered while the loader is in DRIVE. A detailed technical description of the interlocks is in Chapter Two.

These instructions are for a typical sequence. They describe operations necessary to start the loader and move it to an aircraft.

WARNING: DO NOT ATTEMPT TO OPERATE THIS LOADER UNTIL YOU HAVE BEEN TRAINED AND AUTHORIZED TO DO SO.

WARNING: BEFORE STARTING THE ENGINE, PUT THE DRIVE CONTROL SWITCH IN THE NEUTRAL (N) POSITION.

WARNING: DO NOT OPERATE THIS LOADER IN AN ENCLOSED AREA WITHOUT ADEQUATE VENTILATION. EXHAUST FUMES FROM AN INTERNAL COMBUSTION ENGINE CONTAIN CARBON MONOXIDE, A COLORLESS, ODORLESS, DEADLY GAS.

C.3.b. Power Unit Operation

C.3.b.1.

See the Engine Manual, which is part of the Manufacturer's Appendices, for detailed information on the operation of the specific engine installed in this loader.

Prestart Instructions

Lift and move the Drive Selector Switch to the neutral (N) position. The starter may operate only when the engine is not running and this switch is in the N position.

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STAI

DRIVE SELECTOR SWITCH MUST BE LIFTED WHEN BEING TOGGLED.

FIG. 5: DRIVE SELECTOR SWITCH

Starting Instructions

CAUTION: DO NOT OPERATE THE STARTER CONTINUOUSLY FOR MORE THAN 30 SECONDS. AFTER PROLONGED USE, ALLOW THE STARTER TO COOL BEFORE ENGAGING IT AGAIN.

Move the Ignition/Starter switch directly from the OFF position to the START position and hold for approximately ten (10) seconds or until the engine starts. Release the switch when the engine starts. The lever will automatically return to the IGN position. The switch may not be turned to the START position without first returning to the OFF position. If the engine dies or fails to start, the ignition switch must be moved to the OFF position before it may be returned to the START position.

When the switch is released, a timing cycle begins and prevents immediate re-engagement of the starter. This assures that the engine comes to a complete stop before the starter motor is re-engaged.

Moving the switch to the ACC position has no function on the standard TLC 818 Loader.

Moving the switch to the OFF position shuts off the engine and all systems.

The switch returns to the IGN position when it is released after the starter is operated. It is the "RUN" position.

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FIG. 6: IGNITION SWITCH

The engine is equipped with an automatic shutdown system which operates in the event of low fuel supply {Optional), loss of engine coolant, high engine coolant temperature or loss of engine oil pressure. The cause of the shutdown must be determined and corrected before the engine is started again.

NOTE: Complete scheduled operator maintenance checks before operating this loader to insure against engine shutdown.

NOTE: If the ignition switch should be left in the IGN position prior to being moved to the START position, a shutdown could occur due to the engine protection system. Before a restart is attempted the ignition switch must be turned off for 30 seconds to allow the system to reset.

C.3.b.3 Emergency Battery Charging

Check that the problem is not an open circuit breaker. Reset the breakers to insure that the circuit is closed. Discharged batteries should be removed, recharged, or replaced.

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WARNING: WHEN USING JUMPER CABLES, POLARITY MUST BE OBSERVED.

C.3.b.4.

CONNECT NEGATIVE (-) TO NEGATIVE AND POSITIVE (+) TO POSITIVE, OTHERWISE SERIOUS DAMAGE TO THE ALTERNATOR SYSTEM MAY OCCUR. TO PREVENT THE IGNITION OF HYDROGEN GAS WHICH MAY BE PRESENT IN THE VICINITY OF THE BATTERIES, CONNECT THE JUMPER CABLES IN THE FOLLOWING SEQUENCE:

1. CHECK THAT THE LOADER IS NOT IN ANY WAY IN CONTACT WITH THE EXTERNAL POWER SOURCE.

2. CONNECT THE JUMPER CABLE TO THE POSITIVE (+) EXTERNAL 12 VOLT SOURCE, THEN CONNECT THE OTHER END OF THE CABLE TO THE POSITIVE (+) POLE OF THE LOADER BATTERY.

3. CONNECT THE SECOND JUMPER CABLE TO THE NEGATIVE (-) EXTERNAL 12 VOLT SOURCE, THEN CONNECT THE OTHER END OF THIS SECOND CABLE TO AN UNPAINTED SPOT (AWAY FROM THE BATTERY) ON THE LOADER FRAME OR BUMPER.

Cold Weather starting option

Ether Injector Option, (Detroit Diesel Option Only).

Some engines are equipped with an optional ether injection system as an aid to cold weather starting. If the engine temperature is below 60°F, the system automatically injects a controlled amount of starting fluid into the intake manifold as the engine is started. The reservoir tank contains approximately 200 measured injections of starting fluid and will normally last for a full winter season.

Cold Weather Heater Option (115V)

CAUTION: DO NOT RUN THE ENGINE WHILE THE ENGINE COOLANT HEATER IS CONNECTED. DO NOT OPERATE THE COOLANT HEATER UNLESS THE COOLANT IS AT THE PROPER LEVEL.

The Cold Weather Engine Heater option is an engine coolant heater. The heater aids cold weather starting by heating the engine cooling system. This helps maintain proper oil viscosity and increases the cylinder wall temperatures, making engine cranking and starting easier.

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The Hydraulic Oil Heater Option provides a heating element inside the Hydraulic Reservoir. This helps maintain proper oil viscosity.

Preheat Cold Start (Perkins Diesel Only)

Perkins Engines may be fitted with a preheater which is operated by pressing a button at the lower right of the DRIVE Control Panel before operating the starter.

NOTE: Cold weather starting instructions are in the engine manual.

C.3.b.S Post start Instructions

CAUTION: IF THE OIL PRESSURE AND VOLTAGE READINGS DO NOT RISE TO THE PROPER LEVEL WHEN THE ENGINE IS RUNNING, SHUT THE ENGINE OFF IMMEDIATELY AND REPORT THE MALFUNCTION.

As the engine starts, perform the following checks:

1. Check that the oil pressure (PRESS) rises. The oil pressure should be approximately 60-70 PSI at 1000 RPM.

2. The voltmeter (VOLT) reading should rise to 14-15 volts and remain in the green area if the battery is in good condition. At a fast idle, the reading should be between 13 and 15 volts if the alternator and regulator are working properly. A reading of less than 12 volts indicates that the alternator or regulator is not operating properly. If the voltmeter reading is off scale low with the engine running, a circuit breaker is tripped or there is a circuit malfunction.

3. Allow the engine coolant temperature to reach normal operating temperature (160F-185F) before applying a load to the engine.

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•• FIG. 7: METERS AND GAUGES

••

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C.3.b.6


Engine Shutdown

WARNING: WHEN PARKING THE LOADER, PLACE THE STABILIZERS IN THE "DOWN" POSITION BEFORE SHUTTING OFF THE ENGINE. VERIFY THAT THE RED "LOAD" LAMP IS ILLUMINATED.

C.3.c

C.3.c.1

Move the ignition switch to the "OFF" position to stop the engine and the electrical system.

Stabilizer operation

The TLC 818 Loader may be driven only when in the DRIVE mode, which is indicated by the green "DRIVE" lamp on the Driving Control Panel.

stabilizer UP Instructions

STAB

FIG. 8: STABILIZER CONTROL SWITCH

To place the loader in the "DRIVE" mode, hold the Stabilizer Control Switch (STAB) in the "UP" position until the GREEN "DRIVE" Lamp is illuminated. The stabilizers will retract until they are fully UP or the switch is released.

The Adjustable Level Rear Wheel System may raise and lower the rear of the loader. The rear of the loader raises for clearance whenever the stabilizers are raised.

As the stabilizers move "UP" the LOAD mode functions are disabled and the RED "LOAD" lamp is turned off. When the stabilizers reach the full "UP" position, the drive system is activated.

The controls are interlocked to prevent the loader from being driven with the Elevator UP or the stabilizers NOT retracted. The interlock also prevents accidental extension of the stabilizers while the loader is being driven.

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C.3.d.

C.3.d.1


Stabilizer DOWN Instructions

When the stabilizer switch is moved to the "DOWN" position, the stabilizers extend until the control switch is released or the stabilizers are fully extended.

When both stabilizers have moved into the full "DOWN" position, the drive system is disabled, the loading systems operate, and the red LOAD indicator lamp is illuminated.

Emergency stabilizer Operation

The position of the stabilizers controls whether the TLC 818 is in the LOAD Mode (Stabilizers DOWN) or the DRIVE Mode (Stabilizers UP). If the stabilizers are not fully UP or fully DOWN, the loader will not be in either mode, and neither the DRIVE nor the LOAD systems will work. These emergency procedures allow the stabilizers to be operated to complete a loading cycle and to move the loader off an aircraft in the event of a system failure.

Emergency Stabilizers UP Operation

If the engine is running but the stabilizers do not raise when the Stabilizer Control Switch is held UP:

1. Check that the Elevator is completely DOWN.

2. Check that the drive selector switch is in NEUTRAL.

3. Close the Stabilizer Emergency Retraction Valve by turning the knob fully clockwise.

If the stabilizers still do not raise, do the following three things at the same time:

1. Hold the steering wheel in a full turn to either side.

2. Hold the Stabilizer Control Switch UP.

3. Override the Stabilizers UP Solenoid Valve on the Valve Plate by pressing and holding the override button.

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STABILIZERS UP SOLENOID VALVE

FIG. 9: STABILIZERS UP CONTROL VALVE

If the engine is not running or if the stabilizers do not raise when the control valve is overridden:

1. Open the stabilizer Emergency Retraction Valve, which is located on the hydraulic plate, by turning the knob fully counter-clockwise.

2. Operate the Stabilizer Emergency Retraction Hand Pump until both stabilizers clear the ground.

3. Turn the knob on the Emergency Retraction Valve fully clockwise to close the valve.

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NOTE: It may be necessary to loosen the jam nut on the valve stem before the knob may be turned.

C.3.d.2

STABILIZER HAND PUMP

FIG. 10: HAND PUMP AND VALVE

Emergency Stabilizers DOWN Operation

If the engine is running but the stabilizers do not lower when the Stabilizer Control Switch is held DOWN.

1. Check that the Drive Selector Switch is in NEUTRAL (N).

2. Close the stabilizer Emergency Retraction Valve by turning the knob fully clockwise.

If the stabilizers still do not lower, do the following three things at the same time:

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1. Hold the steering wheel in a full Left turn.

2. Hold the Stabilizer Control Switch DOWN.

3. Override the Stabilizers DOWN Solenoid Valve on the Valve Plate by pressing and holding the override button.

NOTE: Do not assume that the stabilizers are not fully down because the LOAD indicator is not illuminated. The bulb may be defective.

C.3.e Driving Operations

WARNING: DO NOT DRIVE THE LOADER WITH THE BRIDGE RAISED UNLESS MAKING A FINAL APPROACH TO THE AIRCRAFT. DRIVING THE LOADER WITH THE BRIDGE RAISED CAN LEAD TO MISJUDGMENT OF OVERHEAD/SIDE CLEARANCES WHICH CAN RESULT IN INJURY OR DEATH.

WARNING: DO NOT TRANSPORT CARGO WITH THE LOADER. SUCH USE MAY RESULT IN INJURY TO PERSONNEL AND DAMAGE TO THE LOADER.

CAUTION: IF THE WINTERIZATION KIT IS INSTALLED, CHECK THAT THE ENGINE HEATER SERVICE CORD IS DISCONNECTED FROM THE ELECTRICAL POWER OUTLET BEFORE DRIVING THE LOADER.

C.3.e.1 Normal Speed Driving Instructions

Check that the loader is in the DRIVE mode. Lift and move the drive selector switch to F (forward) or R (reverse).

Accelerate the loader to the desired speed by pressing on the accelerator pedal. Releasing pressure on the accelerator while the loader is under way provides hydraulic dynamic braking to stop loader movement.

Remove pressure from the accelerator pedal to stop loader movement. The brake pedal operates the service brake used during final positioning of the loader at the aircraft.

NOTE: THIS SWITCH MUST BE LIFTED WHEN BEING TOGGLED.

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C.3.e.3.


Drive Selector switch

Note: switch must be lifted when toggled

FIG. 11: DRIVE SELECTOR SWITCH

Inching Instructions

Apply very light pressure on the accelerator pedal for extremely slow ground speed when operating close to aircraft, or in confined areas.

Positioning the Loader at the Aircraft

These are general instructions. Observe company procedures and safety regulations when operating this equipment.

WARNING: ALWAYS APPROACH AIRCRAFT AT A SLOW SPEED. BE AWARE OF CLEARANCES BETWEEN THE LOADER AND ALL AIRCRAFT SURFACES.

Approach the aircraft with the loader so that the leading edge of the Bridge is centered below and parallel to the aircraft cargo door.

Stop the loader so that the leading edge of the bridge will be no closer than two (2) inches, or (5) centimeters, from the aircraft when the bridge is raised.

Raise the bridge as required, by moving the BRIDGE Lift Switch on the DRIVE Control Panel to the "UP" position, to reach the aircraft door controls.

Open the aircraft door and raise the bridge to sill height. Inch the loader into final position and lower the stabilizers, placing the loader in the LOAD Mode.

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C.3.e.4


If installed, connect the Bridge Auto Leveling System per instructions in this chapter.

Backing the Loader Off the Aircraft

The loader must be clear of cargo. Close the aircraft door and lower both platforms completely.

Raise the stabilizers by holding the Stabilizer Control Switch "UP" until the green DRIVE Lamp is illuminated.

Lift and move the Drive Selector Switch to the reverse position and carefully back the loader clear of the aircraft.

C.4. Emergency DRIVE Mode Operations

These emergency procedures are for moving the loader clear of the aircraft and towing it. Continued use of any of these procedures is not recommended. Troubleshooting is covered in Chapter Two.

C.4.a Emergency Driving Operations

C.4.a.1 Emergency systems Shutdown

If a system does not stop when its control is moved to the OFF position or a brake is applied, press the Emergency Stop Button or move the ignition switch to the "OFF" position.

Note: The Emergency stop Button must be pulled back out before the engine may be started again.

C.4.a.2 Emergency Short Distance Movement Without DRIVE Lamp (Engine Operating)

WARNING: LOWER THE BRIDGE TO THE "FULL DOWN" POSITION BEFORE MOVING THE LOADER. DO NOT DRIVE THE LOADER WITH THE BRIDGE RAISED.

1. Hold the ELEVATOR LIFT Switch (LOAD Control Panel) in the DOWN position until the elevator bottoms on the frame.

2. Use the emergency procedures to raise the stabilizers clear of the ground.

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3. one ramp attendant must open the Electrical Enclosure door at the left front of the loader and hold the Emergency Drive Switch in the UP position while the operator backs the loader clear of the aircraft.

FIG. 12: EMERGENCY DRIVE SWITCH

EMERGENCY DRIVE SWITCH

4. When the loader is clear of the aircraft, lower the stabilizers using the emergency procedures and place the loader out of service.

C.4.b Emergency Towing Procedures

C.4.b.1 Short Distance Towing

CAUTION: DO NOT USE THIS PROCEDURE IF THE LOADER IS TO BE TOWED A DISTANCE IN EXCESS OF 1/4-MILE.

1. Retract the stabilizers, using the emergency procedure if necessary, and apply the brake.

2. Place the Drive Selector Switch in the NEUTRAL (N) position.

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3. Open the Propulsion Bypass Valve, located on the upper rear frame crossmember weldment below the bridge (See Fig. 13).

~RoruLSION

BX~ASS VALVE

FIG. 13: PROPULSION BYPASS VALVE

4. Attach the tow line to the loader at the tow points which are located on either side of the loader at the rear. Use specified points at the front end behind the engine compartment (See Figure 13A) . If your loader does not have these holes or the tow-ring shown in figure 13A, Do NOT tow from the front end. Release the brake, and tow no faster than 10 MPH.

CAUTION: TOWING AT SPEEDS IN EXCESS OF 10 MPH MAY RESULT IN REAR WHEEL DAMAGE.

TOW BAR HOLES BOTH SIDES

FIG. 13A: TOWING POINTS, FRONT END

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C.4.b.2


Long Distance Towing

1. Remove the cover plate from the center of the planetary drive, which is at the center of the front wheel, and is reached from the right side of the loader. Remove the thrust washer and the sun gear from the planetary. Reverse the gear (turn it over) and replace it. Replace the thrust washer and the cover. This will disconnect the gearbox (See Fig. 14).

WASHER

COVER PLATE

FIG. 14: PLANETARY DRIVE COVER PLATE

WARNING: DISCONNECTING THE PLANETARY ELIMINATES THE LOADER'S DYNAMIC BRAKING. ELIMINATION OF DYNAMIC BRAKING WILL INCREASE THE STOPPING DISTANCE. TOW AT 5 MPH MAXIMUM.

2. Raise the stabilizers, using the emergency procedure if necessary, and apply the brake.

3. Place the Drive Selector Switch in the NEUTRAL (N) position.

4. Complete preparations using short distance towing procedures.

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D. LOAD Mode

After the loader has been correctly positioned at the aircraft, and the bridge has been raised so that the aircraft cargo doors may be opened, move the Stabilizer (STAB) switch to the "DOWN" position and hold until the red LOAD indicator lamp on the Driving Control Panel is illuminated. This places the loader in the "LOAD" mode.

D.l. Load Mode Control/Indicator Locations (See Fig. 15)

D.l.a.

D.l.b

LOAD mode operations are controlled from the LOAD Panel which is on the front side of the operator's console opposite the DRIVE Control panel. The cargo handler faces the rear of the loader.

Lift Switches

There are two Bridge Lift Control Switches. The switch which is at the left center of the Driving Control Panel raises or lowers the bridge at a fast speed. The BRIDGE LIFT Switch (Item 4) located at the upper left side of the LOAD control Panel raises or lowers the bridge slowly.

The ELEVATOR LIFT switch (Item 5), located at the upper center of LOAD Control Panel, controls the raising and lowering of the elevator.

Bridge Controls

The BRIDGE REAR GUIDES and BRIDGE FORWARD GUIDES Switches (Item 7) are at the left center of the LOAD Control Panel. They control the lateral alignment of the bridge guide rails.

The BRIDGE TILT Switch (Item 6) is at the center of the LOAD Control Panel. It controls the height adjustment of the left corner of the bridge platform. If the Optional dual tilt system is installed, both sides of the bridge will tilt.

some Loaders may be equiped with the Optional Automatic Bridge Leveler System (See Paragraph D.3.a.2).

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LOAD/UNLOAD CONTROL PANEL

1. Elevator Inner Guides Up/Down Switch (Optional)

2. Elevator Outer Guides Up/Down switch (Optional)

3. Rear Adjust Up/Down Switch

4. Bridge Platform Up/Down Switch

5. Elevator Platform Up/Down Switch

6. Bridge Tilt Switch 7. Bridge Guides

Left/Right Switches (Optional)

1 2 4

LOADER

8. Main Deck Wide Body switch (Optional)

9. Elevator Conveyors Joysticks 10. Bridge Conveyor Joystick 11. Elevator Rear Stop

Retract Button 12. LD-3 Container Rotate Switch 13. Lower All Conveyors Switch 14. Container Rotate Switch

125 11 wide Guides Up/Down (Optional)

15. Side Load Switch 125" wide Guides Up/Down (Optional)

9

11

12

Fig. lS: Load/Unload control Panel 1-2 Page 25 AUG/90

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D.1.d

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Elevator Guides controls

The Elevator Platform has a maximum of six guides which may be raised so that cargo may be driven against them and aligned. The Elevator Guides switches are at the left of the LOAD Control Panel. The upper two switches (Item 1) control the INNER GUIDES, and the lower two (Item 2) control the OUTER GUIDES. The Optional switches located in a seperate box (Item 14 and 15) at the bottom of the control panel, control the outer guides on the 125" Wide extensions. The outer guide rails can be controlled independently for side loading. In the rotate mode, both outer guide rails lower, along with the rear pallet stop to clear cargo.

Rear Adjust switch

The REAR ADJUST switch (Item 3), located on the lower left of the LOAD Control Panel, controls the Adjustable Level Rear Wheel System. This system allows the operator to raise and lower the rear of the loader so that it is at a height equal to the cargo transport equipment.

cargo Movement Controls

There are three systems for moving cargo on the Elevator Platform:

1. The two sets of conveyor chains and the rear roller move cargo lengthwise.

2. The two sets of lateral drive tires and the framemounted side rollers move cargo laterally.

3. The rear set of lateral drive tires may be operated by the LD-3 Rotate Switch (Optional) to rotate cargo.

Conveyor Controls

The three CONVEYOR switches (joy sticks) are located at the right center of the LOAD Control Panel. The top lever (Item 9) controls the Elevator Rear conveyors, Elevator Rear Lateral Drive, and the Side Rollers. The middle lever (Item 9) controls the Elevator Forward Conveyors, the Forward Lateral Drive, and the Side Rollers. The lower lever (Item 10) controls the Bridge Conveyors.

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LD-3 Rotate switch

The LD-3 Rotate Switch (Item 12) is at the right center of the LOAD Control Panel. It controls the 2 sets of lateral drive tires located at the rear of the Elevator Platform. Activating the LD-3 Rotate Switch will operate the tires in opposite directions to rotate containers only.

WARNING: THE REAR ROLLER WILL OPERATE WHENEVER THE LD-3 ROTATE SWITCH IS ACTIVATED.

D.l.e.3 Pallet Rotation

D.l.e.4

Large Pallets are rotated by locating the pallet over the two sets of drive tires located at the center of the elevator platform. Hold the conveyor joysticks in opposite directions left and right to rotate the pallet.

Rear stop Retract Button

The REAR STOP RETRACT Button (item 11) at the upper right of the LOAD Control Panel controls the rear stop. Pressing the button lowers the stop, which is normally raised.

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D.2 LOAD Mode Emergency Controls

WARNING: IN THE EVENT OF A LIFT CYLINDER HYDRAULIC LINE FAILURE, IMMEDIATELY STOP ANY ASCENT OR DESCENT OF THE PLATFORM. DO NOT OPERATE ANY ASCENT OR DESCENT OF THE PLATFORM. IMMEDIATELY CONTACT A QUALIFIED SERVICE PERSON FOR REPLACEMENT OF THE FAILED LINE.

D.2.a Emergency systems Shutdown

D.2.b

D.2.c

LOCK

If a fluid leak develops, or a system does not stop when a control is moved to the "OFF" position, push the Emergency Stop Button or move the ignition switch (DRIVE Control Panel) to the "OFF" position.

Emergency Main Bypass Valve

The main bypass valve must be closed before any of the LOAD systems will operate, except for the Elevator Lift System. Turning the steering wheel to a full Left and holding it in that position will cause the steering circuit to act as an emergency Main Bypass Valve.

Lift Cylinder Lock Valves

ELEVATOR LIFT CYLINDER LOCK VALVE

FIG. 16: LIFT CYLINDER LOCK VALVE LOCATIONS

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The lift cylinders are held in position by lock valves which may be opened in an emergency to lower the Elevator and Bridge platforms. The lock valves are mounted on the lift cylinders. Use extreme caution when opening lock valves.

D.2.d Emergency cargo Movement controls

D.2.d.1 Bridge conveyor Bypass Valve

D.2.d.2

D.2.d.3

D.2.e

The Bridge Conveyor Bypass Valve is a needle valve located under the left front corner of the Bridge. Opening the valve allows cargo to be pushed off the Bridge Conveyor.

Emergency conveyor Operation Using switches

The three Conveyor Switches (Joysticks) on the LOAD Control Panel, may be used when cargo is to be manually pushed off a platform due to a power unit failure if the loader still has electrical power. If the Loader still has electrical power, it is not necessary to open the Conveyor Drive Motor By-pass Valve.

Lower conveyors switch

This switch is at the lower right of the LOAD Control Panel. It lowers all conveyor systems on the Elevator Platform so that cargo is supported by the casters and may be moved manually.

Manual override of Solenoid Valves

All of the hydraulic systems of the LOAD Mode are governed by valves which are operated by solenoids. If a valve fails to operate it can be manually overridden by pressing the override button on the valve solenoid.

D.3 Load Mode Operator Instructions: Aircraft Loading

WARNING: DO NOT OPERATE THIS LOADER UNTIL YOU HAVE BEEN TRAINED AND AUTHORIZED TO DO SO.

WARNING: THE CAPACITY OF THIS LOADER IS 15,000 LBS ON EACH PLATFORM. These instructions follow a typical loading operation sequence. Controls which are located on the LOAD Control Control Panel work only when the loader is in the LOAD mode.

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D.J.a. Bridge Lift and Alignment Operation

D.3.a.1 Initial Bridge Alignment

WARNING: DO NOT DRIVE THE LOADER WITH THE BRIDGE RAISED EXCEPT DURING FINAL APPROACH. APPROACH THE AIRCRAFT AT A SLOW SPEED.

CAUTION: BE SURE THE OPERATOR'S PLATFORM GUARD RAILS CLEAR THE AIRCRAFT AS THE BRIDGE IS RAISED. REPOSITION THE LOADER AS REQUIRED FOR PROPER ALIGNMENT.

D.3.a.2 Bridge Auto Leveling System (Optional)

Some loaders may be equiped with the Optional Bridge Auto Leveling System, located at the front of the bridge platform (See Fig 16 A). If your loader is not equiped with this feature, move onward to "Raising The Bridge". If your loader is equiped with this feature proceed with the following.

FIGURE 16A: BRIDGE AUTO LEVELING SYSTEM INTERFACE

CAUTION: REVIEW THE INSTRUCTIONS IN THIS CHAPTER FOR "RAISING THE BRIDGE" BEFORE APPROACHING AIRCRAFT.

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The Auto Leveling System allows the loader platform to maintain a constant deck height between the aircraft door sill and the loader bridge platform.

Connecting The Auto Leveling System To The Aircraft

The bridge auto leveling system allows the operator to choose the desired deck height for operation. With the auto level system switched to "OFF", interface the loader with the aircraft per the instructions in this chapter. Stop the bridge about 18 inches below the aircraft door sill. Secure the sensing clamp to the aircraft door stud. The clamp may be attached to whatever is convenient on the aircraft as long as the clamp is below the aircraft cargo transfer surface and the cable is not at an angle left or right. Raise the bridge platform to the desired height.

Activating The Auto Leveling system

To activate the system, lift the RED switch guard over the "ON/OFF" switch and move the switch to "ON". The GREEN L.E.D. will illuminate indicating the System is Operating (See figure 16B). When the auto leveling system is activated, the bridge controls for UP and Down are disabled to prevent interference.

To readjust the height of the bridge relative to the aircraft, turn "OFF" the auto leveling system, manually readjust the bridge height with respect to the aircraft sill, then switch the auto leveling system to "ON".

~ .... , i) I ' / I I --"' I

~--- ---: I I I I I I I I

BRIDGE AUTO LEVELER

ON

0 OFF

SYSTEM OPERATING

SAFETY SHUT DOWN

GREEN L.E.D.

RED L.E.D.

FIGURE 16B: BRIDGE AUTO LEVELING SYSTEM CONTROLS (Auto Leveler)

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The auto leveler allows the bridge to move 1/4 inch UP or 1/4 inch DOWN from normal level before the command to0 move the platform is given.

Motion Of Platforms

With the auto leveling system "ON" and a GREEN Light (L.E.D.) illuminated, if the sensing cable is pulled in the UP direction greater than 1/4 inch, the auto leveling system will respond giving the command to move UP. After the qualification time has passed and the UP comand is still present, the system will move the platform in the UP direction until the UP command is canceled. The system responds the same for platform DOWN if the cable is allowed to retract 1/4 inch from the normal level centered position.

The auto leveling system has a STAND-BY feature which incorporates the sensing of the bridge CONVEYOR JOYSTICK positions. If the bridge conveyors are in use, forward or reverse, the auto leveling system is put on STAND-BY until the chains have stopped moving. This feature allows transfer from the bridge platform to the elevator platform or aircraft door without the auto leveling causing problems due to loads being straddled.

The ELEVATOR platform is under normal control by the operator until interfaced with the BRIDGE platform. When interfaced, if the DOWN command is given to the bridge platform, the elevator platform will be given the same command until the interface between platforms is broken. With the auto leveling system back to its neutraljlevel state, the elevator platform is not allowed to align itself to the bridge platform. Alignment of the elevator platform to the bridge platform is left to the operator for safety.

Safety Shut Downs

In the event of operator error, the auto leveling system has two on board safety systems. The first safety system senses the amount of cable pulled or retracted from the normal centered operating position. If the cable is allowed to extend 1 inch beyond or retracted 1 inch form the normal center position, the auto leveling system will go into a SHUT-DOWN mode. A shut-down mode consists of all automated leveling functions and bridge platform conveyor forward (to aircraft), becomming non-operational. In the shut-down mode, the RED FLASHING LIGHT (L.E.D.)

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will illuminate at the placard "SAFETY SHUT DOWN" (See figure 16B). In this mode the GREEN "SYSTEM OPERATING" light (L.E.D.) is no longer illuminated.

The second safety shut-down consists of a "catch all" timer. This timer allows the automated movement of the auto leveling system to be in motion for 1.5 seconds. If the auto leveling system is unable to align itself to the normal center position after 1.5 seconds of platform movement, the safety catch all timer will then activate and provide the same system shut-down.

Reactivation After A Safety Shut-Down

To reactivate the auto leveling system from a safety shut-down, perform the following procedures:

1. Turn the auto leveling system to "OFF". 2. Make sure the sensing clip is secured. 3. Realign bridge platform to door sill height. 4. Turn the auto leveling system to "ON".

Raising The Bridge

After the loader has been correctly positioned at the aircraft, lower the stabilizers.

Raise the bridge by lifting either the BRIDGE switch on the DRIVE Control Panel or the BRIDGE LIFT switch on the LOAD Control Panel. The bridge will lift until the switch is released or the bridge reaches the limit of it's travel.

CAUTION: BEFORE OPENING THE AIRCRAFT DOOR, BE SURE THAT THE BRIDGE IS LOW ENOUGH AND PROPERLY CENTERED SO THAT THE DOOR WILL NOT STRIKE THE LOADER STRUCTURE.

Continue to raise the bridge until the aircraft cargo door may be opened. Release the switch. The bridge will stop and be held in position.

The BRIDGE switch on the DRIVE Control Panel raises and lowers the bridge at a fast rate. The BRIDGE LIFT switch on the LOAD Control Panel raises and lowers it at a slow rate. These controls work in either the LOAD or DRIVE mode.

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Final Bridge Alignment

Extension

sr'i dge Oecl:: Panel (Right)

Bridge Oecl: Panel (Lett)

Guard Rail Extension

FIG. 17: BRIDGE DECK PANELS AND GUARD RAIL EXTENSIONS

WARNING: SOME LOADERS MAY BE EQUIPPED WITH A POST AND CHAIN SAFETY RAIL.

WARNING: FULLY EXTEND THE LEFT AND RIGHT EXTENDABLE BRIDGE DECK PANELS AND KICK INTO POSITION TO COVER THE OPEN AREA BETWEEN THE FUSELAGE AND THE BRIDGE. IF REQUIRED, INSTALL POST AND CHAIN SAFETY RAIL ON THE FORWARD BRIDGE AREA.

FIG. 18:

POST AND CHAIN SAFETY RAIL 1-2

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Operate the BRIDGE LIFT Switch, either up or down, until the leading edge of the bridge is level with the aircraft floor.

WARNING: INSTALL ALL SAFETY POSTS AND CHAINS BEFORE LOADING CARGO.

D.3.b

The Bridge Tilt System raises and lowers the left front corner of the bridge to compensate for aircraft pitch changes.

Rear Adjust Operation

Use the Rear Adjust Switch to raise or lower the rear wheels of the loader so that the lowered Elevator Platform is just below the level of the ground transport vehicle.

D.3.c Elevator Platform Loading Operations

D.3.c.1 End Load Operation

Lower the Rear Stop and move the top Conveyor Switch (joystick) down to operate the rear roller in the forward direction. This also raises the rear conveyor chains and operates them in the forward direction. The lateral drive tires will lower below the caster level so that they do not contact the cargo.

WARNING: THE REAR ROLLER WILL OPERATE WHENEVER THE REAR ELEVATOR CONVEYOR OPERATES.

As the cargo approaches the forward Elevator Platform conveyor chains, move the middle Conveyor Switch (joystick) down so that the forward conveyor is raised and moving forward when cargo reaches it.

If space allows, move the cargo to the forward end of the Elevator Platform and continue loading.

An automatic pallet stop at the forward end of the Elevator Platform prevents cargo from being driven under the bridge.

WARNING: NEVER SIDE LOAD WITH THE ELEVATOR ABOVE THE FRAME. TRANSFER CARGO AT AN INTERMEDIATE LEVEL ONLY AT THE REAR END OF THE LOADER.

Cargo may be end loaded onto the Elevator Platform at an intermediate height (platform raised above the frame but lower than the Bridge Platform).

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Hold the Rear Stop Retract button down when transfering cargo onto the Elevator Platform at an intermediate height.

Container Rotate Operation

WARNING: THE REAR ROLLER WILL OPERATE WHENEVER THE CONTAINER ROTATE SYSTEM OPERATES.

D.3.c.3

The LD-3 ROTATE Switch lowers the Rear Conveyor, raises the Rear Lateral Drive tires so that they support the container, and turns the tires in opposite directions to rotate the container.

Use the top CONVEYOR Switch (joystick) to center the container over the lateral drive tires before using the LD-3 ROTATE system.

After the container is rotated, it may be aligned by driving it laterally against the inner or outer guide rails.

Pallet Rotate Operation

WARNING: THE SIDE ROLLERS WILL TURN WHENEVER THE LATERAL DRIVE SYSTEM OPERATES.

D.3.c.4

Large containers and pallets are rotated by using both sets of lateral drive tires. Center the cargo between the forward and rear pairs of lateral drive tires. Hold the Joysticks to opposite sides to rotate the cargo. Drive the cargo against the guide rails to align it after rotation.

Side Load Operation

To side load cargo onto the Elevator Platform, lower the outer Guide Rail on that side and raise the rail on the opposite side. These rails are controlled by the OUTER GUIDES Switches and can be lowered only when the elevator is resting on the frame, full down position. If installed, activate the optional 125" wide extension guides by using the side load switch No 15 located in a seperate box at the lower left corner of the load control panel. The guides will automatically raise when the ELEVATOR LIFT operates, but if a switch is left in the DOWN position, the outer guide will lower whenever the Elevator Platform is fully down.

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Use the CONVEYOR switch to drive the cargo onto the Elevator Platform. If necessary, use the inner or outer guide rail to align the cargo. Raise the conveyor chains and move the cargo by use of the conveyor joysticks.

Elevator Lift Operation

WARNING: NEVER ENTER THE AREA BELOW THE ELEVATOR DURING LOADING OR UNLOADING OPERATIONS.

Hold the ELEVATOR LIFT Switch in the UP position. The warning horn will sound while the lift operates. The elevator will stop at the bridge level.

When the Elevator reaches the Bridge, the rear Bridge Forward Elevator Pallet Stop lower

REAR LATERAL DRIVE TIRES

~'-L.__..:;-- CL-,._,..-STABILIZERS DOWN

FIG. 19: LOAD MODE SYSTEMS

REAR ROLLER

SIDE ROLLERS

NOTE: If necessary, re-adjust the bridge height and bridge trim to match the aircraft.

WARNING: IF THE AUTOMATIC SLOWING AND STOPPING SYSTEMS ARE INCORRECTLY ADJUSTED OR MALFUNCTION, THE ELEVATOR WILL CONTINUE RISING UNTIL IT REACHES FULL HEIGHT, LIFTING THE BRIDGE WITH IT.

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In an emergency, stop the Elevator Lift by pushing the Emergency Stop Button on the LOAD Control Panel or by turning the Ignition Switch on the DRIVE Control Panel to "OFF".

D.3.e Bridge Platform Loading Operations

D.3.e.1 Guide Alignment

D.3.e.2

The Bridge Guides switches control the lateral movement of the forward and rear ends of the bridge guide rails. These rails may also be manually repositioned to accept wide cargo. Align the guides with the in-plane system so that cargo can move directly across the Bridge and into the aircraft.

The front of the bridge guide rails move laterally six inches full travel. The rear ends of the rails may move four inches (Standard). If equipped the rear ends of the rails may move six inches (Optional).

Move the switch in the direction of the desired rail movement. Releasing the switch stops the rail and holds it in position.

Bridge conveyor operation

Move cargo off the Elevator Platform and onto the Bridge by using the middle CONVEYOR switch (joystick), which controls the forward Elevator Platform Conveyor, and the lower CONVEYOR switch (joystick), which controls the Bridge Conveyor. Use the two controls together so that the Bridge Conveyor is moving when cargo contacts it.

As soon as the Bridge Platform is clear, move the remaining cargo from the Elevator Platform to the Bridge.

WARNING: NEVER LOWER THE ELEVATOR PLATFORM WITHOUT CHECKING THAT CARGO HAS BEEN MOVED COMPLETELY ONTO THE BRIDGE PLATFORM.

Lower the Elevator Platform when it is clear of cargo.

D.4 LOAD Mode Operator Instructions: Aircraft Unloading

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WARNING: DO NOT OPERATE THIS LOADER UNTIL YOU HAVE BEEN TRAINED AND AUTHORIZED TO DO SO.

These instructions follow a typical unloading operation sequence. Controls which are located on the Cargo Handling Control Panel work only when the loader is in the LOAD mode.

D.4.a Bridge Platform Unloading Operations

D.4.a.l Elevator Platform Lift

D.4.a.2

D.4.a.3

After the Bridge is aligned and level with the aircraft cargo door, raise the Elevator Platform to Bridge level. As the Elevator Platform reaches Bridge level the forward pallet stop on the Elevator Platform and the rear pallet stop on the Bridge Platform will lower automatically.

Bridge Guide Alignment

The Bridge Guides Switches control the lateral movement of the forward and rear ends of the bridge guide rails. These rails can also be manually repositioned to accept wide cargo. Align the guides with the in-plane system so that cargo may move directly across the Bridge and onto the Elevator Platform.

The front of the bridge guide rails move laterally six inches full travel. The rear ends of the rails may move four inches. Move the switch in the direction of the desired rail movement. Releasing the switch stops the rail and holds it in position.

Bridge Conveyor Operation

Move cargo off the Bridge and onto the Elevator Platform by using the lower CONVEYOR switch (joystick), which controls the Bridge Conveyor, and the middle CONVEYOR switch (joystick), which controls forward Elevator Conveyor. Use the two controls together so that the Elevator Conveyor is moving when cargo contacts it.

Use the middle and top CONVEYOR Switches (joysticks) to move the cargo to the rear of the Elevator Platform, and continue unloading the aircraft until the Elevator platform loading is complete.

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WARNING: NEVER LOWER THE ELEVATOR PLATFORM WITHOUT CHECKING THAT CARGO HAS BEEN MOVED COMPLETELY OFF THE BRIDGE PLATFORM.

D.4.a.4 Emergency cargo Transfer Operations

If the Bridge Conveyor System fails to operate when the control switch is used:

Use the steering circuit as an emergency main bypass.

If the system still fails to operate:

Override the control valve which is under the forward part of the Bridge.

If the system still fails to operate, or if the loader's engine does not operate, push the cargo off the bridge, either back into the aircraft or onto the elevator platform.

If the electrical system is operating, hold the control switch (joystick) in the desired direction while the cargo is pushed.

If the Bridge Conveyor still will not turn with the cargo on it, open the Bridge Conveyor Bypass Valve below the left front corner of the Bridge Platform and then push the cargo off the Bridge. Valve location is shown on the Hydraulic Service Diagram which is attached to the inside upper right hand stanchion.

D.4.b Elevator Lowering Operations

D.4.b.1 Normal Elevator Lowering

WARNING: NEVER ENTER THE AREA BELOW THE ELEVATOR DURING LOADING OR UNLOADING OPERATIONS.

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ORIVE MOTOR

FIG. 20: BRIDGE CONVEYOR BYPASS VALVE

Hold the ELEVATOR LIFT Switch DOWN until the elevator bottoms on the frame.

D.4.b.2 Emergency Elevator Lowering

WARNING: IF THE LINE TO THE BASE OF EITHER ELEVATOR LIFT CYLINDER HAS BROKEN OR BURST, DO NOT USE THESE PROCEDURES. DO NOT ATTEMPT TO CHANGE THE ELEVATOR HEIGHT. MOVE ANOTHER LOADER INTO POSITION BEHIND THE DISABLED LOADER, MATCH THE ELEVATOR HEIGHTS, AND TRANSFER THE CARGO. AFTER THE CARGO HAS BEEN REMOVED, RAISE THE STABILIZERS AND TOW THE DISABLED LOADER SLOWLY, FROM THE AFT END.

If electrical system is operating, even if engine is not operating, move the ELEVATOR LIFT Switch to the DOWN direction. The elevator will lower by gravity.

If electrical system is not operating override the Elevator Lift Cylinder Lock Valves.

FIG. 21: ELEVATOR LIFT CYLINDER LOCK VALVE

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WARNING: CHECK THAT THE IGNITION SWITCH IS IN THE "OFF" POSITION BEFORE OPENING THE LIFT CYLINDER LOCK VALVES.

WARNING: ALL PERSONNEL, EXCEPT MAINTENANCE PERSONNEL PERFORMING THESE PROCEDURES, SHOULD REMAIN CLEAR OF THE LOADER UNTIL THE ELEVATOR IS LOWERED.

WARNING: DO NOT ENTER THE AREA BELOW THE ELEVATOR DURING THIS PROCESS.

Open the overrides on the two lock valves by turning and lifting the cap on the top of the valves. One lock valve is attached to each lift cylinder. When the lock valves are open, the elevator will be held in position by the Elevator Down Slow valve.

ELEVATOR DOWN SLOW OVERRIDE BUTTON

FIG 22: ELEVATOR DOWN SLOW SOLENOID VALVE

WARNING: DO NOT REACH BEHIND THE VERTICAL FRAME MEMBER FOR THE ELEVATOR DOWN SLOW VALVE. THIS WILL PLACE YOU IN THE PATH OF THE DESCENDING ELEVATOR. REACH THROUGH THE VALVE PLATE AREA FORWARD OF THE FRAME. WATCH THE DESCENDING ELEVATOR.

Press the manual override button on top of the Elevator Down Slow solenoid valve, located near the aft end of the hydraulic panel. Hold the button until the elevator bottoms on the frame.

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Rear Adjust Operation

Use the Rear Adjust switch to raise or lower the rear wheels of the loader so that the lowered Elevator Platform is just above the level of the ground transport vehicle.

D.4.d Elevator Platform Unloading Operations

D.4.d.1 End Load Unloading operations

WARNING: THE REAR ROLLER WILL OPERATE WHENEVER THE REAR ELEVATOR CONVEYOR OPERATES.

Lower the Rear Stop then drive the cargo off the Elevator Platform onto the ground transport equipment. Cargo may be unloaded from the Elevator Platform at an intermediate height of 60" MAXIMUM for truck height. Move the Elevator Platform level with the ground transport equipment and release the ELEVATOR LIFT switch. The platform will remain at that level.

Hold the Rear Stop Retract button down while transfering cargo onto the Elevator Platform at an intermediate height.

WARNING: NEVER SIDE LOAD WITH THE ELEVATOR ABOVE THE FRAME.

D.4.d.2

TRANSFER CARGO AT AN INTERMEDIATE LEVEL ONLY AT THE REAR END OF THE LOADER.

Side Load Unloading Operation

To unload from the side of the Elevator Platform, lower the outer Guide Rail on that side and raise the rail on the opposite side. These rails are controlled by the OUTER GUIDES Switches and can be lowered only when the elevator is resting on the frame.

The guides will automatically raise when the ELEVATOR LIFT operates, but if a switch is left in the DOWN position, the outer guide will lower whenever the Elevator Platform returns to fully down.

Use the ELEVATOR CONVEYOR Joystick to operate the lateral drive tires and the side rollers, to drive the cargo off the Elevator Platform. If the Optional 125" wide system is installed, use the side load switch (SW-15) to lower the guides.

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D.4.e Bridge Lowering Operation

D.4.e.1 Normal Bridge Lowering

Use the BRIDGE LIFT Switch on the LOAD Control Panel to lower the Bridge at a slow rate, and the BRIDGE Switch on the DRIVE Control panel to lower the Bridge at a fast rate. Hold the switch DOWN until the Bridge bottoms on the frame.

D.4.e.2 Emergency Bridge Lowering

WARNING: IF THE LINE TO THE BASE OF EITHER BRIDGE LIFT CYLINDER HAS BROKEN OR BURST, DO NOT USE THESE PROCEDURES. DO NOT ATTEMPT TO CHANGE THE BRIDGE HEIGHT. MOVE ANOTHER LOADER INTO POSITION BEHIND THE DISABLED LOADER, MATCH THE PLATFORM HEIGHTS, AND TRANSFER THE CARGO. AFTER THE CARGO HAS BEEN REMOVED, RAISE THE STABILIZERS AND TOW THE DISABLED LOADER SLOWLY FROM THE AFT END.

If electrical system is operating, even if engine is not operating, move the BRIDGE LIFT Switch to the "DOWN" position. The BRIDGE will lower by gravity.

If electrical system is not operating override the Bridge Lift Cylinder Lock Valves. Press in and turn knobs to lock both valves in the open position.

Two people are needed to lower the bridge using the manual override system. Slowly open both lock valves at the same time. The bridge will lower by gravity.

BRIDGE LIFT CYLINDER . LOCK VALVE

FIG. 23: BRIDGE LIFT CYLINDER LOCK VALVE LOCATION

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Property of American Airlines Operator Manual...operation and maintenance manual tlc 818-144so...

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