Load Sensing
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Transcript of Load Sensing
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Technical Description RL 52Pipe Layer
Engine output 243 kW/330 HP
Max. lift capacity 80 tons/176,400 lbOperating weight 52.3 tons/115,322 lb
The Better Machine.
litronic
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The RL 52 Pipe Layer: Versatile, precise
The decisive economicalfactors of the RL 52 Litronic:
1. The construction machine engine:
The heart of the RL 52 pipe layer is the Liebherrdiesel engine, with reduced emissions, speciallydesigned for construction site applications.In addition to a high level of reliability, the enginealso offers exemplary performance and it doesso while achieving a low level of fuel consumption
previously unattained.The pipe layers cooling system is specially adaptedto high ambient temperatures. The coolers extre-mely large distance between ribs provides for highreliability and longer periods between serviceintervals.
2. The hydrostatic travel drive:
The outstanding characteristic of the pipe layer isits modern drive concept. In contrast to conventionalsystems, this drive offers decisive advantages inpipeline construction, like e.g.
x Stepless speed regulation
x Single lever operationx Constant drawbar force on both tracks
preventing the machine from sinking on softground
x Exact positioning of the pipe due to the abilityto turn on the spot
x Maximum drawbar force is available to theoperator as soon as the machine starts travel
x Low operating costs due to wear-free brakesand a low number of drive components.
3. The innovative undercarriage:
The asymetrical undercarriage makes it possibleto work specially on the load side while groundpressure is reduced considerably. At the sametime, the machines off-centered center of gravity,provides the pipe layer unimagined lift force.
4. The simple and comfortable operation:
Operating elements, proven in on site experience,make the Liebherr pipe layer remarkable.All travel functions, all boom functions as well asthe load hook are controlled by one joystickrespectively. Optimal for safe and easy handlingof the machine.
5. The economical working attachments:
Above all, the pipe layers working attachmentsare convincing due to their functionality with:
x the hydraulically driven winchx the hydraulically adjustable boomx the standard working hydraulics can be used
to drive a pipe facing machine or a weldinggenerator.
The boom can be adjusted preciselyand without sudden jerks with ahydraulic cylinder.
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The hydraulically drivencable winch offers steplessand precise control of theload hook. Lowering theload occurs while stressflows constantly. If thecable winch is not beingused, the automatic safetybrake is applied immediatelyand thus guarantees secureholding of the load.
and economical.
The pipe layer can also be equippedboth with a canopy and a fullyenclosed operators cab.
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Technical Data
Diesel EngineLiebherr-Diesel Engine____ D 9406 TI-ERating per ISO 9249 ________ 243 kW (330 HP) at 1800 RPMDisplacement__________________ 13 l / 794 cu.in.Bore/stroke ____________________ 135/150 mm / 5.31/5.91Design____________________________ 6 cylinder in-line engine, water-cooled,
turbocharged, intercooledInjection ________________________ direct fuel injection with in-line injection
pump, mechanical governorFuel filter ______________________ pre-cleaner with water separator and fine
filtersLubrication ____________________ pressurized lube system with full flow
filter and integrated oil cooler, deep oilpan for inclinations, engine lubrication toan inclination of up to 45hto each side
Operating voltage____________ 24 VAlternator ______________________ 80 Amp.Starter____________________________ 9 kW (12 HP)Central fuse box______________ 40 ABatterie __________________________ 170 Ah
Travel DriveDesign____________________________ closed-loop hydrostatic drive, each track
is driven by one variable flow swashplate-type pump and one variable dis-placement motor
Pump flow ______________________ max. 425 l/min / 112.2 gal/minMax. pressure ________________ adjusted to 420 bar / 6090 PSITravel speed __________________ 011 km/h / 0-6.8 mph infinitely variable,
forward and reverseSteering__________________________ hydrostaticService brake__________________ hydrostaticParking/emergency
brake______________________________ automatic multi disc brake in final drivesCooling system ______________ hydraulic oil cooler with separate cooling
circuit with gear pump and front mounted
coolerFilter system __________________ cartridge fine filters in the cooling circuitFinal drive______________________ 2-stage planetary reduction gear
Track FrameDesign____________________________ maintenance-free tractor-type track
framesMount ____________________________ elastic components at a separate pivot
shaftChains____________________________ lubricated, track chain tension via grease
tensioner, single grouser padsChain links ____________________ 48Sprockets ______________________ 3 replaceable segmentsTrack rollers __________________ 8Carrier rollers ________________ 2Ground contact area________ 5,86 m2 / 3.083 sq.in.Ground pressure ____________ 0.89 kg/cm2 / 12.66 PSI
1,2 2,0 3,0 4,0 5,0 6,0 m0
0,5
2,0
kg/cm2
at max. load
empty
2,5
7,0
1,0
1,5
3,0
3,5
left track (914 mm)
left track (36)
reach
0 4 8 12 16 ft20 24
PSI
Ground
pressu
re
0
4
20
24
8
12
16
28
32
36
40
44
48
0
0,5
2,0
kg/cm2
at max. load
empty
2,5
1,0
1,5
right track (711 mm)
m1,21,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0
0 4 8 12 16 ft20 24
right track (28)
reach
PSI
Gro
und
pressure
0
4
20
24
8
12
16
28
32
36
00
Travel speed km/h
Drawbar pull kN
1 2 3 4 5 6 7 8 9 10 11 12
100
200
300
400
460
500
600
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Travel Control1 Joystick lever ______________with electronic control for all travel func-
tions: travel direction, speed, steering andcounter-rotation
Speed range 1 ________________ 0 4 km/h / 0 2.5 mphSpeed range 2 ________________ 0 6.5 km/h / 0 4 mphSpeed range 3 ________________ 0 11 km/h / 0 6.8 mphElectronic enginespeed sensing control______ electronic regulation assures a constant
balance between travel speed andneccessary drawbar pull through enginespeed sensing avoiding engine overload,even in partial load range
Straight line travel __________ electronically controlledParking/emergency
brake______________________________ automatically applied after the joysticklever is put in neutral position
Safety lever ____________________ inactivates complete travel and workinghydraulic circuit and automaticallyactivates parking brake
Emergency shut off ________ push button on instrument panel imme-diately activates parking and emergency
brakeInch-/Brake pedal __________ for reduction of travel speed to 0 km/h
with integrated braking fonction
Implement HydraulicHydraulic system ____________ on demand (load sensing) control, swash
plate type variable displacement pumpand pressure cut-off for hoist winch andadj. boom and counterweight cylinderdrive
Max. pump flow ______________ max. 292 l/min / 77.1 gal/minPressure limitation__________ adjusted to 280 bar / 4060 PSIControl valve __________________ 3 spool segmentsFilter system __________________ return filter with magnetic rod in hydrau-
lic tankControl __________________________ single servo-assisted joystick lever for
hoist winch, counter weight and adjustableboom cylinder, safety lever preventsinadvertent movement, free fall devicemakes it possible to lower the load incase of danger, single joystick lever for
counterweight
Working AttachmentHoist winch ____________________ driven by variable flow hydraulic pump,
control valve block and variable oilmotor in open circuit. Brake valve helps
to sensitively lower the load over totalspeed range, when the control lever is inneutral, a spring-loaded disk brake holds
the load safely in any positionDrum diameter ______________ 305 mm / 12.01Drum length __________________ 254 mm / 10
Flange diameter ____________ 566 mm / 110Cable diameter ______________ 20 mm / 0.79Cable length __________________ 65 m / 263Hook block ____________________ 6 sheavesHook speed in1. cable position ______________ up 0 16,6 m/min. / 055 ft/min stepless
down 016,6 m/min. / 0 55 ft/min steplessSafety device __________________ free fall control
Adjustable boomcontrol __________________________through hydraulic cylinder, the lifting
and lowering speed of the boom and thehook block can be changed steplessly,drives are fully independent and can beactuated at the same time. A check valvekeeps the boom leakage free in any posi-
tion and prevents uncontrolled boomdrop in case of loss of pressure
Operators PlatformMount ____________________________ resiliently mountedOperators seat________________ fully adjustable swing seat, adjustable to
operator weightRops-canopy __________________ resiliently mounted, can be tilted with
hand pum to 40to the rear foraccessibility to machine components
Monitor__________________________ comprehensive instrument panel on the
right hand side of the operators seat
Refill CapacitiesFuel tank__________________________________________________________________ 610 l / 161 galCooling system ____________________________________________________________ 68 l / 18 galEngine oil __________________________________________________________________ 24 l / 6.3 galSplitterbox __________________________________________________________________ 6 l / 1.6 galHydraulic tank ________________________________________________________ 210 l / 55.4 galFinal drive, each ________________________________________________________ 21 l / 5.5 gal
2 3 4 5 6 71.2
0
10
20
30
40
50
68
39.3
12
Working range
Liftingc
apacity
Max. lift capacityper SAE J 743 B
Max. load capacityper ISO 8813
Working rangeper ISO 8813
6 9 12 15 18 21
311 66 228
ft.in
kg x1000
lbs x1000
0
20
40
60
80
100
120
176.4
149.9
86.6
22.026.5
m
24
60
70
80
140
160
180
Adjustable boom cylinderPiston diameter ______________ 210 mm / 8.27Rod diameter__________________ 110 mm / 4.33Stroke ____________________________ 1460 mm / 49BoomDesign____________________________box-type welded structure made of highly
resilient, grain refined steelFixed boom ____________________ length 7000 mm welded box sectionedCounterweight ________________ installed on the right hand side of the
machine, total weight extractable(12.193 kg / 26,999 lb) removable weightof 9,289 kg / 20,482 lb
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Dimensions
A
B
H
I
G
C
D
C1
F, F1
E, E1J
K
mm / ft-inA Track on ground 3605 / 1110B Length to rear end of machine 5544 / 182C Ground pad width right hand side 711 / 28C1 Ground pad width left hand side 914 / 36
D Track gauge 2260 / 75E Transport width 3755 / 124E1 Width counterweight extended 5509 / 181F Boom overhang, min. 1200 / 311F1 Boom overhang, max. 7002 / 23G Ground clearance 625 / 21H Transport height 3640 / 1111I Boom length 7000 / 23J Total length 5776 / 1811K Total height 8070 / 266
Basic Machine Contents:x Pipe layer RL 52 with
Liebherr Diesel engine D 9406 TI-E
x Chain D8N, single grouser track pads914/711 mm / 36/28, 48 links, sealed and lubricated
x Canopy
x Hoist winch
x Counter weight 12.193 kg / 26,886 lb
x Boom 7000 mm / 23
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Attachments
7
C
G
B
HA
I
E
D
F
J
E
C B
F
A
D
Winch
Swinging drawbar
Max. line pull: 530 kN / 119,107 lbsMax. line speed: 0 20 m/min. / 21.87 yards/minCable size: 28 mm / 1.1Cable length: 60 m / 65,62 yardsWeight: 2588 kg / 5.707 lbs
Dimensions mm / ft-inA Height, cable exit 1525 / 50B Overall length 1189 / 311C Height drawbar 801 / 28D Drum diameter 318 / 11
E Coiling width 737 / 25F Flange diameter 610 / 20G Distance to center of drum 678 / 23H Height of drum center 1352 / 45I Total height 1801 / 511J Overall length of drawbar 919 /30
Weight: 662 kg / 1460 lbs
Dimensions mm / ft-inA Height of drawbar 615 / 20B Ground clearance below
drawbar 513 / 18C Ground clearance below
drawbar suspension 463 / 1 6D Overall length 460 / 16E Pin diameter 60 / 2.36F Size of opening 105 / 4.13
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LWT/VM 8434347-2.0-02.02 Printed in Germany by BVD. Subject to change without notice.
LIEBHERR-WERK TELFS GMBH, Hans-Liebherr-Strae 35, A-6410 Telfs, (05262) 600, Fax (05262) 600 72www.liebherr.com, e-Mail: [email protected]
With compliments:
Basic machineStandard Option
Towing hitch rear x
Towing lug front x
Battery compartment lockable x
Filling with oil SAE 10 x
Filling with oil SAE 30 x
Refuelling pump electrical x
Belly pans heavy duty x
Cold start device ether x
Cold start device glow plug x
Radiator coarse mesh x
Radiator guard 2-piece, hinged x
Liebherr Diesel engine xFan hydraulically driven x
Fan guard x
Engine oil cooler x
Engine doors perforated x
Engine doors hinged, lockable x
Lugs for crane lifting x
Bumper front x
Special paint x
Fuel water separator x
Fuel water separator with electric heater x
Air filter dry-type, dual step x
Precleaner with automatic dust ejector x
Preheater for engine electric x
Tool kit in batteries compartment x
Electric systemStarter motor 6,6 kW
Starter motor 9 kWx
Working lights rear 2 units x
Working lights front 2 units x
Working lights side 2 units x
Battery main switch electric x
Batteries, heavy duty cold start x
On-board system 24 V x
Alternator 55 A
Alternator 80 A x
Back-up alarm x
Horn x
Operators cabStandard Option
Operators seat 6-way adjustable x
ROPS-canopy x
ROPS/FOPS-cab sound supressed x
Protective grid for canopy rear x
Instruments IndicatorsBattery charging x
Hour meter x
Electronic control x
Speed range x
Engine oil pressure x
Water temperature x
Oil pressure cooling circuit x
Oil level final drives x
Fuel level x
Contamination hydraulic filter x
Contamination air filter x
Cold start Diesel engine x
Implement hydraulicControl group boom x
Control group hoist winch x
Control group rear winch x
Control group generator 75 kVA xControl group generator + pipe facing x
Variable flow pump, load sensing x
Oil filter with strainer in hydraulic tank x
Hydraulic servo control x
AttachmentsDrawbar rear hinged x
Drawbar rear rigid x
Boom 2piece foldable 4750 mm
Boom single piece 4750 mm
Boom single piece 6000 mm x
Boom single piece 7000 mm x
Boom single piece 7320 mm
Boom jib
Counter weight rear x
Rear winch x
UndercarriageTrack shoes extreme service (ESS) x
Track frame closed x
Sprocket segments bolt-on x
Master link 2 piece x
Track guide center part x
Tracks oil lubricated x
Undercarriage standard x
Pivot shaft separate x
Travel driveParking brake automatic x
Function control automatic x
Control single lever x
Load limit control electronic x
Travel control electronic x
Travel control 2-speed
Travel control 3-speed x
Hydrostatic travel drive x
Emergency stop x
Oil cooler x
Final drives planetary gears x
Safety lever x
