Liebherr pr724 crawler dozer service repair manual

Page 111

Service Manual

Technical data and Maintenance guidelines Technical data

PR 764 DIESEL ENGINE Type Design Rated to ISO 9249 Rated RPM Low idle RPM High idle RPM Displacement Oil specification / viscosity Max. machine inclination - all directions Valve clearance - cold Firing order

kW RPM RPM RPM l

intake / exhaust

D 9408 TI – E A4 V8 engine – charge air cooled 310 ( 422 PS ) 1800 900 +50 1700 +50 17,18 see Service items section 1.3 45° = 100% See Data tag / engine 1–8–4–2–7–3–6–5

SPLITTERBOX Type Design Ratio Oil quantity Oil specification / viscosity

PVG 351 B 355 Spur gear 1-stage i 0,8653 l 6,3 see Service items section 1.3

HYDRAULIC SYSTEM Variable pumps – travel hydraulic Flow - Qmax Operating pressure (M1 / M2) pmax Axial piston pump – cooling circuit Flow quantity replenishing - Qmax Operating pressure (LA electronically regulated) pmax Ground by pressure LA (with cold machine) Tandem gear pumps - Replenishing – Pilot control WH Flow quantity - Qmax –ges (Qmax –ges =Q1 + Q2) Operating pressure (SP) pmax

Type 2 x THPV 210 l/min 4 x 437 bar 420+30/-10 A 10 V 28 l/min 57 bar 280+/-5 bar 30+5 Size 55 + 55 l/min 232 bar 20+4

Axial piston motor (fan – water cooler) Operating speed Gear motor (fan – hydraulic oil cooler) Operating speed

Size 1/min Size 1/min

Variable displ. motors - Travel hydraulic

Type 4 x HMV 280

Regulating pump – Working hydraulic Flow quantity - Qmax Ground by pressure (HD) Operating pressure (HD) - pmax Pilot control working hydraulic operating pressure (ND)

l/min bar bar bar

Oil tank capacity - circuit capacity - additional Oil specification / viscosity

18/52 1380+100 19 2000+100

A11 VL 190 395 20+2 260+5 20+4

l 280 l 240 see Service items section 1.3

ELECTRICAL SYSTEM Operating voltage Batteries Alternator Starter Central fuse Individual fuses

V 24 2 x 12 V, 170 Ah (in Series) 28 V, 80 A kW 9 A 35 A See Operating instructions

copyright by

Mjfcifss! PR 764

F/N xxx-6888 9505

3.1.60 - 1 / 2


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