Mercedes-Benz 2003 G-Class Manuel d'utilisateur

G ClassG ClassDifferential LocksDifferential Locks217 HO Differential Locks(ACB ICC) 2-05-03

10Vacuum ReservoirVacuum ReservoirLocation: left inner fender wellLocation: left inner fender well

11Differential Lock Switchover ValvesDifferential Lock Switchover ValvesLocation: mounted on the firewall right of the brake boosterLocation: mounted

12Differential Lock Switchover ValvesDifferential Lock Switchover ValvesVacuum supplyVacuum supplyVent filtersVent filtersOutputOutputvacuum linevacuu

13Pressure Intensifier UnitsPressure Intensifier UnitsLocation: inside of left frame railLocation: inside of left frame railFront axleFront axleRear a

14Pressure Intensifier UnitPressure Intensifier UnitFunction:Function:••Vacuum is applied to a large areaVacuum is applied to a large areadiaphragmdia

15Hydraulic CircuitHydraulic Circuitaxle circuit illustratedaxle circuit illustratedPressureintensifier unitShiftcylinder~15.0 barhydraulicpressureDif

16Axle Shift CylinderAxle Shift Cylinder•• Hydraulic force moves the shift piston Hydraulic force moves the shift piston•• Piston movement causes mech

17Axle Locking ElementsAxle Locking Elements1. Shift cylinder1. Shift cylinder2. Axle tube2. Axle tube3. Joint housing3. Joint housing4. Center drive4

18Axle Differential LockAxle Differential LockShift sleeve Shift sleeve notnot engaged with center drive engaged with center driveDisengaged

19Axle Differential LockAxle Differential Lock•• Adjust shift cylinder position when lock engaged Adjust shift cylinder position when lock engaged•• S

2These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Alwayscheck for r

20Transfer Case Differential LockTransfer Case Differential Lock••Operated by vacuum onlyOperated by vacuum only (No hydraulic circuit) (No hydrauli

21Differential LockDifferential LockVacuum lineVacuum lineO-ringO-ringDiaphragmDiaphragmShift Cylinder HousingShift Cylinder Housing

22Differential LockDifferential LockFront transfercase coverCenter diff. with locking splinesFront cover, sliding shaftwith fork and sliding sleeve

23MaintenanceMaintenanceEvery A & B service:Every A & B service:•• Check & correct fluid level Check & correct fluid level•• DOT 4 Plu

24MaintenanceMaintenanceThe WIS job number for bleeding the front and rear differential locks isThe WIS job number for bleeding the front and rear dif

3Why Use Differential Locks?Why Use Differential Locks?A differential allows the driven wheels toA differential allows the driven wheels toturn at dif

4When To Use Differential LocksWhen To Use Differential LocksDriving off-roadDriving off-roadFordingFordingDriving on snowy, icy orDriving on sn

5OperationOperation•• Lock request: Yellow indicator Lock request: Yellow indicator•• Lock confirmation: Red indicator Lock confirmation: Red indicato

62003 MF Display2003 MF DisplayLock requestLock requestLock engagedLock engagedWarning display changed for 2003 due to NHTSA mandateWarning display ch

7•• No self-diagnostics No self-diagnostics•• Guided test available in Guided test available in SDS / DAS SDS / DASDifferential Lock Switch Group (S

8Vacuum and Hydraulic DiagramVacuum and Hydraulic DiagramVacuumPumpVacuumReservoirFrontIntensifierTCLockRearIntensifierHydraulicReservoirDL Cyl.DL Cyl

9Pump motor connector +/-Pump motor connector +/-Vacuum Pump (M40)Vacuum Pump (M40)Task: Supplement manifold vacuum for the differential lock system.T