Liebherr LR 634 Litronic - Manual (Page 14)

Basic machine
Engine
LR 624 LR 634
Liebherr Diesel engine D934 S A6 D934 L A6
emission regulations according to 97/68/EC,
2004/26/EC Stage IIIA and EPA/CARB Tier 3
Net power (ISO 9249) 105 kW / 143 HP 129 kW / 175 HP
Net power (SAE J1349) 105 kW / 141 HP 129 kW / 173 HP
Engine rating 1,800 rpm 1,800 rpm
Displacement 6.4 l / 391 in 3 7.0 l / 427 in 3
Bore/stroke 122 mm / 136 mm 122 mm / 150 mm
(4.80 in / 5.35 in) (4.80 in / 5.91 in)
Design low emission 4 cylinders in-line Diesel engine
with intern exhaust gas recirculation AGR,
turbo-charger, air-to-air aftercooler, single cylin-
der head, wet cylinder sleeves, 4 valves per
cylinder, gear driven water pump as well as fuel
pump and oil pump
Fuel system Unit-Pump-System (UPS) direct high injection
pressure fuel system, electronic engine manage-
ment LH-ECU (Liebherr-Electronic Control Unit)
Lubrication pressurised lube system, engine lubrication
guaranteed for inclination up to 45-degree
Operating voltage 24 V 24 V
Alternator 80 A, Heavy-Duty 80 A, Heavy-Duty
Starter 5.4 kW 7.8 kW
Battery 2 x 135 Ah / 12 V 2 x 170 Ah / 12 V
Air cleaner dry-type air cleaner with pre-cleaner and
automatic dust ejector*, main and safety
elements with radial seal
Cooling system combination cooler with single cooling units for
water, hydraulic oil, fuel and intake charge air
Cooling fan hydrostatically driven, thermostatically controlled
* only for LR 634
14 LR 624 Litronic LR 634 Litronic
Travel drive, control
LR 624 LR 634
Drive system closed-loop infinitely variable hydrostatic travel
drive powered by two axial piston variable dis-
placement pumps and two axial piston variable
displacement motors in swash-plate design,
each track is driven indepedently from each other
Travel speed infinitely variable electronic-controlled
Speed range 1: 0–6.5 km/h / 0–4.0 mph (work)
Speed range 2: 0–10.0 km/h / 0–6.2 mph (travel)
Litronic-System electronic engine speed sensing control
(load-sensing feature) automatically adjusts
travel speed and drawbar pull to match
changing load conditions
Steering hydrostatic, unlimited maneuvrability for full
power turns and counterrotation
Service brake hydrostatic, dynamic braking effect from travel
drive system
Parking/ multi-disc brake, wear-free, automatically
emergency brake applied with neutral joystick position
Cooling system hydraulic oil single unit built in combination
cooler
Filter system micro cartridge filters in cooling circuit
Final drive combination spur gear with planetary gear,
double sealed (duo cone seals) with electronic
seal-integrity indicator
Control single-lever travel control for all travel and
steering motions, as well as for counterrotation
Track frame
LR 624 LR 634
Chains sealed and lubricated, track chain tension via
grease tensioner and hydraulic cylinder
Chain links 39 each side 38 each side
Sprocket segments 5 each side 5 each side
Track rollers 6 each side 6 each side
Carrier roller 1 each side 1 each side
Track shoes standard 508 mm / 20”, 508 mm / 20”,
double grouser double grouser
Track shoes optional 560 mm / 22”, 560 mm / 22”,
double grouser double grouser
610 mm/ 24”,
double grouser
Wider track shoes available on demand
Grouser height 35 mm / 1.38 in 42.5 mm / 1.67 in
Mount pivot shafts and equalizer bar (cushion mounted)
Operator’s cab
LR 624 LR 634
Heater and air pressurised, with fresh air intake and recircula-
conditioner tion air filter, 12 louvered vents for all tem-
perature controlled cab’s areas, sliding side
windows left and right
ROPS/FOPS cab integral Rollover Protective Structure according
to EN ISO 3471 and Falling Objects
Protective Structure according to EN ISO 3449
Operator’s seat adjustable, suspended seat adjustable to
operator’s weight
Monitoring System combination of analog and digital instrument
panel: LC-Display with scroll key for engine
rpm, travel speed and service codes; automatic
monitoring from operating pressures, tempera-
tures and fill levels; hour meter gauge
Tilting system tiltable 40° to the rear with hydraulic hand pump
Noise emission
LR 624 LR 634
Operator sound exposure L
pA
= 78 dB(A) L
pA
= 78 dB(A)
(ISO 6396) (emission at the operator’s position)
Exterior sound pressure L
wA
= 109 dB(A) L
wA
= 110 dB(A)
(2000/14/EC) (emission in the environment)
Hydraulic equipment
LR 624 LR 634
Hydraulic system Load-sensing proportional pump flow control
Pump type variable displacement pump (swash-plate design)
Pump flow max. 162 l/min / 209 l/min /
35.6 Imp. gpm 46.0 Imp. gpm
Pressure limitation 260 bar/ 3,770 PSI 260 bar/ 3,770 PSI
Filter system return filter with magnetic rod in hydraulic tank
Control single joystick implement control for all bucket
functions, with magnetic detent functions for
float position as well as for automatic bucket
positioner and for automatic lift kickout
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