S04 Drill Feed TF & TFX 500

7/23/2019 S04 Drill Feed TF & TFX 500

http://slidepdf.com/reader/full/s04-drill-feed-tf-tfx-500 1/31

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CYLINDER FEED TF 500 / TFX 500

2006 SANDVIK TAMROCK CORP., Tampere PlantP.O.Box 100FIN--33311 TAMPERE, FinlandTel. +358 205 44 121Telefax +358 205 44 120

E

MAINTENANCE AND REPAIR

TF

TFX



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CONTENTS

1. GENERAL 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. SAFETY 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. TECHNICAL DATA 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. LIFTING POINTS 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5. MAIN COMPONENTS 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6. OPERATING PRINCIPLE 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7. BEAM AND CARRIAGE SLIDE PIECES 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1. General 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2. Adjusting slide pieces 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3. Replacing steel strip on beam 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8. FEED CYLINDER 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.1. General 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.2. Cylinder structure 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.3. Replacing seals 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9. HOSE REEL 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. HOSE SUPPORT 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11. ADJUSTING HOSE TENSION 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12. ADJUSTING WIRE TENSION 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13. IMPULSE CYLINDERS 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14. FRONT AND INTERMEDIATE CENTRALIZERS 20. . . . . . . . . . . . . . . . . . . . . . . .

15. RETURN WHEEL 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16. PERIODIC MAINTENANCE 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16.1. Each shift 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16.2. Every week 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17. CYLINDER FEED TFX 500 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18. TECHNICAL DATA 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19. LIFTING POINTS 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19.1. Adjusting slide pieces 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19.2. Instructions to convert TF into TFX 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19.2.1. Drilling holes 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20. ADJUSTING THE LENGTH OF THE FEED 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20.1. Adjusting the intermediate and maximum length 27. . . . . . . . . . . . . . . .

20.2. Adjusting the minimum length 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21. FEED CYLINDERS 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21.1. General 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21.2. Cylinder structure 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



WARNING

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1. GENERAL

The TF 500 cylinder feed is designed for use with the HLX 5 rock drills.

The design of the feed aims at simplicity of structure and ease of maintenance. The maincomponents and the operating principle of the cylinder feed are described later.

These instructions also include a description of the most common maintenance tasks.

The service department is always willing to give advice and help in anyservice--related problems. The trained service personnel of your dealer usethe proper tools and modern instruments, and the required original spareparts.

2. SAFETY

Before starting maintenance work, move the rig away from thesite where you have just been drilling.

Perform maintenance and repair work only when the rig isstopped. Remember to make sure that the rig cannot beaccidentally started during repair.

Follow all safety instructions, and always protect yourself withthe necessary safety devices. Use proper tools.

Keep all inflammable material, such as oily rags, etc., at a requireddistance from the working position.

Do not work under devices that are supported by hydraulics only.Use separate supports during maintenance and repairs.

CAUTION

CAUTION

CAUTION

CAUTION



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Control the condition of hoses regularly, and check that they runproperly in the guides. Remember that a hose breakage can alsocause personal injury.

When checking the hydraulic circuit for leaks, look and listen, donot feel about with hands – high--pressure oil sprays canpenetrate the skin and cause serious injuries.

Watch out for rotating parts.

Certain work phases require the use of a feed cylinder duringrepair. Make sure that

-- it does not cause any danger

-- the rig can be stopped at once, if necessary, and that

-- the powerpack is stopped again before continuing the repair work.

WARNING

WARNING

WARNING

CAUTION



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3. TECHNICAL DATA

Type identifier TF 500

Max. feed force 25 kN

TF 500 10’ 12’ 14’ 16’ 18’ 20’

Length [mm] 4660 5270 5880 6490 7100 7710

Feed travel [mm] 2830 3440 4050 4660 5270 5880

Drill rod length [mm] 3090 3700 4305 4915 5525 6135

Weight [kg] 480 510 530 560 600 630

Weight (kg) without rock drill

4. LIFTING POINTS

5. MAIN COMPONENTS

Front centraliser

Intermediate centraliser

Beam

Feed cylinder

Hose supportRock drill

Hose reel



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6. OPERATING PRINCIPLE

The feed is constructed so that the cylinder tube (1) is a moving part, and the piston rod(2) is fixed to the rear end of the feed beam. The intermediate centraliser (3) and the hosereel (4) are fixed to the cylinder tube (1), and move along with the cylinder tube. The travelspeed of the rock drill (5) is doubled with a system of wire ropes (6 and 7)and returnwheels(8 and 9) fixed to the intermediate centraliser and the hose reel.

54

3

8

29 61

7



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7. BEAM AND CARRIAGE SLIDE PIECES

7.1. General

The beam of the TF 500 is made of an aluminum profile with the sliding surfaces facedwith stainless steel strips.

The carriers of the rock drill, hose reel, and intermediate centraliser move along the feedbeam on similar slide pieces. Each slide piece is fastened to the carrier with three screwsand nuts through the frame strip. The screws lock the slide piece lengthwise. The formof the slide pieces and their supports function as lateral locking.

Steel strip

Slide piece

Frame strip

Carriage

Locating shoulder

Adjusting holes

7.2. Adjusting slide pieces

The slide pieces normally require noadjustments when replaced, as the piecesare located to correct clearances at the

beam centre line with the aid of locatingshoulders on the carriers and the framestrips.

If the slide pieces are so worn that theclearance is more than 3 mm, theclearance can be adjusted to the specifiedvalue with the slotted holes in the carriages.

After adjustment, the screws are tightenedto 120 Nm.

max. 1.5 mm

clearance = 0



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7.3. Replacing steel strip on beam

The steel strips on the beam can become damaged, for instance, by rocks falling on thebeam. The steel strip (5) is available as a spare part in 7.5 m lengths.

1. Open the four front centraliser mounting screws (2). Remove the front centraliserbody (1) from the front end of the beam.

2. Remove all slide pieces (3) and their frames (6) from one side of the cylinder feedTF 500.

3. Remove the mounting pieces (4). Remove the old steel strip. Wash the rail.

4. Slide the new steel strip (5) on the feed and put it in place by turning the steel strip.

Use silicone for sealing.5. Push the steel strip (5) against the rear end, and cut the steel strip to length.

6. Use mounting pieces (4) to tighten the steel strip (5).

7. Replace the slide pieces (3).

8. Repeat steps 1 to 7 to the other side of the cylinder feed TF 500.

9. Mount the front centraliser body to the beam. Tighten the screws (2) to 300 Nm.

10. It is recommended that you remove the wear pieces of the rock drill, hose reel andcentraliser to make the change easier.

1

3

5

5

4

2

Use silicone here

6



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8. FEED CYLINDER

8.1. General

The maximum working pressure of the cylinder is 180 bar for forward feed and 250 barfor return movement. Oil is led into the cylinder through the piston rod, to both sides of thepiston.

8.2. Cylinder structure

126

7 8

3 4 5

Total length

1. Cylinder tube

2. Piston rod

3. Adapter

4. Return wheel (wire)

5. Return wheel bracket

6. Mounting piece

7. Pressure connection (extending cylinder = feed movement)

8. Pressure connection (contracting cylinder = return movement)

8.3. Replacing seals

The feed cylinder has the following seals:

1. Piston seal

2. Piston rod seal

3. Guiding rings

4. Wiper

5. Cylinder cover O--ring

We recommend replacement of the seals in conjunction with every second overhaul of therock drill (c. 1000 percussion hours).

D Check that the tools you need for the replacement work are clean. Also clean thecylinder parts before installing seals.

D Lubricate the components before installing them.



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Before replacement of seals, the cylinder must be removed from the feed as follows:

1. Disconnect the feed cylinder hoses and plug them.2. Disconnect the pull and return wires from the rock drill carriage.

3. Disconnect the rock drill carriage from the feed beam, and lift the carriage out.

4. Disconnect the intermediate centraliser carriage from the return wheel bracket.

5. Disconnect the hose reel carriage from the feed beam.

6. Disconnect the hose reel carriage from the cylinder tube.

7. Lift the feed cylinder out.

Cylinder dismantling

1. Remove the hose nipples from the piston rod.

2. Open the socket retainer screws (3 pcs).

3. Pull the return wheel bracket and bushing off.

4. Screw the cover with the O--rings off the cylinder tube.

5. Open the socket retainer screws (2 pcs) and screw the mounting piece loose fromthe feed cylinder piston rod.

6. Pull the piston and piston rod out of the cylinder.



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Replacing piston seal

1. Remove the old seal.

2. Install the new seal into its groove by gently stretching it with the aid of e.g. ascrewdriver. Installing can be made easier by warming up the seal in an oven, oilbath or water (to max. 200˚C).

3. After installing, set the seal into its groove using e.g. a cylinder tube. Lubricate theseal first.

Replacing piston rod seal

1. Bend the piston rod seal with caution so that no sharp bends are formed. Installthe sealing ring into the correct groove using your fingers and press the seal intothe groove with your fingers.

2. Set the seals into the grooves after installing. An oiled piston rod can be used forthe setting the seals, but do it very carefully as the setting direction is unfavorableto the seals. The wiper is slipped into its groove.

Special tool kit ID 34544578 is available.



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Assembling the cylinder

1. Replace the cover O--ring. Check that the O--ring is nottwisted.

2. Push the piston and piston rod carefully into thecylinder tube.

3. Screw the cover to the end of the cylinder tubeand tighten it with tightening torque of 750 Nm.

4. Fasten the return wheel bracket to the end of the cylindertube wit the socket screws (3 pcs).

5. Screw the hose nipples to the piston rod. Use new seals.

6. Screw the mounting piece to the piston rod end and tightenit with tightening torque of 300 Nm. Lock it with the socketretainer screws (2 pcs). Secure it with Loctite 243.



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9. HOSE REEL

General

The hose reel keeps the rock drill hoses in the correct order andproper tightness.

Structure

The hose reel is mounted to the base plate with four screws. Thebase plate is mounted to the feed cylinder tube with four bolts.

Hose order

41

2

3

56

41

3

2

56

1

477

7

2

5

6

1. Percussion (pressure)

2. Percussion (return)

3. Flushing

4. Shank lubrication

5. Rotation

6. Rotation

7. Stabilizer



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Check the condition of the hose reel components at least in conjunction

with every second rock drill overhaul.

D Disconnect the rock drill hoses and plug them.

D Lift the hoses off the drum.

D Disconnect the return wire.

D Disconnect the hose drum base plate from the hose drumcarriage and lift the hose drum off.

D Open the four bolts (13).

D Remove the cover (12).

D Open the axle nut (9) and remove the securing plate (10).

D Lift the hose reel (1) off the axle.

D Remove the bushing (4).

D Lift the return wheel (5) and its bearings (7, 8) off.

D Check the condition of the ball bearings (6, 7 and 8).Replace if necessary.

10. HOSE SUPPORT

The hose support is mounted to the side of the feed beam. The rock drill hoses aremounted to it in the order shown in the figure. The feed cylinder hoses are also connectedto the hose support as shown.

1. Percussion (pressure)

2. Percussion (return)

3. Flushing

4. Shank lubrication

5. Rotation

6. Rotation

7. Stabiliser

8. Feed cylinder hoses

1

2

3

4

5

6

7

8

9

10

11

12

13

14

456

123

8

7



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11. ADJUSTING HOSE TENSION

The rock drill hoses are fastened to the hose support by clamping them between pieces(1) and (2). Both clamping pieces hold hoses.

1

3

4

2

When adjusting hose tensions, leave the percussion pressure hoseslightly less tensioned than the others.

Adjusting hose tension:

1. Open the two bolts (3) on the side of the hoses to be tightened.

2. Pull the hoses to appropriate tightness (the suitable slack of the hoses isapproximately 5 cm).

3. Clamp the hoses by tightening the two bolts (3).

CAUTION



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12. ADJUSTING WIRE TENSION

A new wire tends to stretch at first until the wire strands have become somewhatstraightened. Therefore, retighten the wires after replacement when, for instance, oneround has been drilled.

Adjustment is done when the wire is unloaded and the hose reel is in the rear position.

1. Adjust the return wire (A) at the wire end connected to the hose support. The wireend is provided with a threaded piece and locking nuts.

D Open the locking nut (2) at the hose support and use the other nut (1) to tightenthe wire. Use a suitable tool to prevent the wire from turning.

D Tighten the locking nut (2).

2. Tighten the pulling wire (B) using the tubular nut (3) at the rear end of the feed.

D Open the locking nut (4) through the opening at the rear end of the beam.

D Use a suitable tool to prevent the wire from turning, and tighten the wire so that acorrect clearance (85 to 88 mm for stabiliser model or 150 to 153 mm for basicmodel) is left between the rear of the rock drill and the front edge of the hose reel,as shown in picture on page 18.

D Tighten the locking nut (4).

3



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3. Check the adjustment of wire tensioning when drilling with full feed power. Thereturn wire may not have a greater slack than 50 mm.

HLX Stab. 85 to 88 mm

basic 150 to 153 mm 12

3 4

A B

Max 50 mm



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13. IMPULSE CYLINDERS

Impulse cylinders

1

2

1. Impulse cylinders and inductive sensors

2. Bleeding screws

IMPORTANT! Impulse cylinders must be bled after repair operation.

Impulse cylinder and inductive sensors

Impulse cylindermounting position

Inductive sensormounting position

The stopping device must not touch the inductive sensor’s cap when the feed cylinder isin its extreme position.



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14. FRONT AND INTERMEDIATE CENTRALIZERS

The front and intermediate centralizers are equipped with wear pieces (2) made of steel.The pieces are locked to the body (1) with jaw pieces (3). The jaw pieces are mountedto the body with screws (4), tightening torque 300 Nm.

The buffer (5), acting as a stinger, is mounted to the front centraliser body (1) with fourbolts (7) (4 pcs, tightening torque 100 Nm).

The front centraliser is mounted to the feed beam with four bolts (8), tightening torque 300Nm.

4

2

3 51

7 8

Front centraliser

(100 Nm)

(300 Nm)

(300 Nm)

4

2

3

1

Intermediate centraliser

The intermediate centraliser (1) is mountedto the base plate (2) with four bolts (3).The base plate is mounted to the returnwheel bracket (4) with four bolts (5).

1

2

3

4

5 (200 Nm)

(100 Nm)



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15. RETURN WHEEL

The pulling wire return wheel (2) ismounted to the return wheel bracket (1) asshown in the figure.

When replacing the bearings (3), drive thepin (4) through the axle (5) so that the axlecan be removed.

NOTE! Before assembling new

bearings, remove inner seals.

To make the replacement of the bearings(3) easier, remove the return wheel bracket(1) from the cylinder tube end after openingthe three retaining screws.

16. PERIODIC MAINTENANCE

16.1. Each shift

1. Visually check the condition of the components and hoses. Report possible faultsimmediately.

2. Check the inside of the feed beam for loose rocks and excessive amounts of drillcuttings. Remove as necessary.

16.2. Every week

1. Wash the feed with a high--pressure washer as often as possible – at least once a week.

2. Check the sliding clearances of the carriages and the condition of the slide pieces. Adjust or replace as necessary.

3. Check the tightness and condition of the feed wires. Adjust as necessary.

4. Check the tightness of bolts and nuts. If a self--locking nut has loosened, replaceit. If an ordinary bolt connection loosens repeatedly, use a self--locking nut orchemical thread locking compound.

5. Check the tension of the hoses. Adjust as necessary.



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17. CYLINDER FEED TFX 500

The TFX 500 cylinder feed is designed for use with the HLX 5 rock drills.

The design of the feed aims at simplicity of structure and ease of maintenance. The maincomponents and the operating principle of the cylinder feed are described later.

These instructions also include a description of the most common maintenance tasks.

The service department is always willing to give advice and help in anyservice--related problems. The trained service personnel of your dealer usethe proper tools and modern instruments, and the required original spareparts.

18. TECHNICAL DATA

Type identifier TFX 500

Max. feed force 25 kN

Type Total length min / max Feed travel Mass

TFX 10/16 4700 / 6530 2830 / 4660 710 kg

TFX 8/14 4090 / 5920 2220 / 4050 660 kg

TFX 6/12 3480 / 5310 1610 / 3440 620 kg

Weight (kg) without rock drill

19. LIFTING POINTS



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19.1. Adjusting slide pieces

max. 1.5 mm

clearance = 0

adjusting screws

Adjusting slide pieces using ‘adjusting screws’. The adjustment is carried out beforetightening of the screws. Adjust the slide piece frames so that the clearance between theslide piece and the steel strip is less than 1.5 mm.



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19.2. Instructions to convert TF into TFX

Check that the feed--beam frame has mounting holes for the bearing block. If there areno holes, drill them according to the illustration.

19.2.1. Drilling holes

Fig 1. Bearing block mounting holes



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1

234

5

1. Remove the front centraliser from the TF feed (1), and install a plate in place of thefront centraliser.

2. Install the slide pieces and slide--piece frames (2, 3) and the TF feed on top of theTFX beam.

3. Attach the bearing block (4) and the feed cylinder (5) of the lower beam.

4. Adjust the slide pieces according to the chapter ‘Adjusting slide pieces’.

5. Install and connect the hydraulic hoses.



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20. ADJUSTING THE LENGTH OF THE FEED

OF FEED

DIRECTION

OF FEED

DIRECTION

ADJUSTING

PRESSURE

30--40 bar 100--120 bar

TFX 500 TFX 550

ADJUSTING

PRESSURE

Note! With the TFX 500 feed you must use approx. 15 bar (TFX 550, 50 bar) higher feedpressure than with TF feed, because of the pressure relief valve mounted into the line of upper feed cylinder B port.

Example: If you normally use 90 bar feed pressure with the TF feed, you have to set the

feed pressure up to 105 bar (TFX 550, 140 bar) with the telescopic feed by using the feedpressure adjusting valve.

The feed pressure can also be adjusted during drilling. The adjustment is correct, whenthe beam and rock drill move simultaneously (not with the same speed). The feedpressure is adjusted 0.5 times higher than the value of the adjusted valve compared tothe TF feed.



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20.1. Adjusting the intermediate and maximum length

When you adjust the TFX 500 feed to intermediate or maximum length, you must adjustthe feed to minimum length first (steps 1 to 4). There is no middle position setting for themodel TFX 550.

1. Open the ball valves (1) and (2) fully.

2. Feed the rock drill forward until the whole system has the shortest position(minimum length).

3. Close the ball valve (2) fully.

4. Feed the rock drill backward until it is facing the rear stopper, and run it against therear stopper for approximately 10 seconds.

5. Open the ball valve (2).

6. Run the feed’s inner tube to desired length by running the rock drill against the rearstopper.

(With lower cylinder )

7. Close the ball valve (2).

8. Feed the rock drill against the rear stopper for about 10 seconds.


10. Open the ball valve (2) fully.

11. Check that the ball valve (1 ) is fully closed and the ball valve (2) is fully open. (Alsosee the shield on the next page)

Maximum length

Minimum length

Fig 2. Maximum and minimum length



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20.2. Adjusting the minimum length

1. Open the ball valves (1) and (2) fully.2. Feed the rock drill forward until the whole system is as short as possible (refer to

Figure 2 ‘Maximum and minimum length’).


4. Feed the rock drill backward until it is facing the rear stopper.

5. Run the rock drill backward against the rear stopper for about 10 seconds.


7. Check that both ball valves (1) and (2) are fully closed. (Also see the shield on thenext page).



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Setting TFX 500 to different lengthsby using an instruction as areminder.

For setting the length to minimum, followthe steps (1 to 5) which are described onthe plate’s upper picture.

For setting the length to intermediate ormaximum, follow all the steps (1 to 11)which are described on the plate.

The steps are read from left to right andtop to bottom.

STEPS:

1. Open the ball valves (1) and (2)

2. Feed the rock drill forward until thewhole system has the shortestposition.


4. Feed the rock drill until it is facingthe rear stopper for approximately

10 seconds.5. Close the ball valves (1) and (2)

6. Open the ball valves (1) and (2).

7. Run the feed’s inner tube intodesired length by running the rockdrill against the rear stopper.

8. Close the ball valve (2).

9. Feed the rock drill against the rearstopper for approximately 10

seconds.10. Close the ball valve (1) fully.

11. Open the ball valve (2) fully. 20960108



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21. FEED CYLINDERS

21.1. General

The maximum working pressure of the cylinder is 180 bar for forward feed and 180 barfor return movement. Oil is led into the cylinder through the piston rod, to both sides of thepiston.

21.2. Cylinder structure

3 21

4

The cylinder of the lower beam

5

6

A C B

2

76

1. Cylinder tube

2. Piston rod

3. Cylinder pin

4. Pressure connection

5. Pressure connection

6. Intermediate piston

7. Piston



C 31095-- 5 en 1006 / VO

31 (31)


Changing the seals of the inner cylinder

4

12 3 5

7

1. Open the cover (3) of the cylinder.

2. Pull the piston rod (2) out from the cylinder tube (1).

3. Unscrew the bushing (7) from the piston (4).

4. Unscrew the locking screw (8)

5. Unscrew the piston (4) from the piston rod (2).

6. Pull the piston rod (2) out from the intermediate piston (5) and cover ( 3).

7. Change the seals and guide rings.

S04 Drill Feed TF & TFX 500

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