31 10 001 Completely removing and installing front axle with engine and transmission (N55 automatic transmission)
Special tools required:
Check the vehicle payload.
Footwell at front is loaded with approx 200 kg.
Note safety information of TABLE LIFT !
Necessary preliminary tasks:
- Position vehicle on vehicle hoist so its weight is centered.
- Disconnect battery.
- SUCTION OFF the air conditioning.
- Remove EXPANSION TANK .
- Remove FAN COWL with electric fan.
- Drain COOLANT .
- REMOVE bulkhead sound insulation.
- Detach vacuum line from brake booster.
- Detach ENGINE WIRING HARNESS in electronics box and set aside.
- Remove complete PROPELLER SHAFT .
- Remove front BRAKE PADS .
- Remove both brake calipers at the front and hang them to one side.
Necessary preliminary work for engine or transmission replacement
Following repair work must be carried out before removal of the front axle support with a table lift.
- Disconnect torque converter from flywheel.
Crank engine at vibration damper in direction of rotation until screw (1) is visible in recess.
Release 6 bolts of torque converter with special tool 24 1 110 .
Tightening torque 24 40 1AZ .
Installation note:
Replace screws (remove any adhesive residues in thread).
Unscrew knurled screw (1) from special tool 2 222 741 (do not remove completely) before inserting in the recess of the transmission housing.
Insert special tool 24 1 370 and shaped element (3) in the recess.
Slightly tighten knurled nut (2).
Screw in knurled screw (1) fully.
- Locating pin (4) must be located between converter and engine.
Move special tool 2 222 741 in the recess until the locating pin (4) rests against the converter.
Use knurled nut (2) to fix special tool 2 222 741 and converter in position.
Unlock and detach thermostat on radiator (1).
Release screw (1).
Tightening torque 17 22 4AZ .
Remove engine oil pipe from thermostat (2).
Unlock and detach coolant hose (3).
Release hose clamp (1) with special tool 17 2 050 and detach coolant hose (2).
Unlock and detach charge air line (1) and charge air pipe (2) of charge air cooler and set to one side.
Release screws (1) and remove refrigerant lines (2).
Tightening torque 64 52 1AZ .
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to install sealing rings without damaging them.
Release clamping bolts (1) on steering shaft at the bottom of the steering gear and pull off.
Installation note:
Clean screw threads to remove all remnants of screw locking adhesive.
Replace clamping bolts.
Tightening torque 32 31 2AZ .
Unlock and detach both electrical connectors (1) on steering gear.
Unclip cable routing from front axle support and fold back cable toward engine support.
Installation note:
Replace faulty cable clips.
Recycling:
Catch and dispose of escaping fuel with auxiliary materials.
Observe country-specific waste disposal regulations.
Release screws (1) and remove protective plate (2).
Unfasten fuel line (1) and disconnect.
Unlock and detach tank ventilation line of carbon canister (2).
Close off fuel line (1) with special tool 13 5 161 .
Close off fuel line (2) with special tool 13 5 162 .
Release ground cable at body.
Open connector housing (1), pull electrical connection out of bracket and disconnect.
Disengage cable with rubber grommets from holders (2).
Installation note:
Check that the electrical connectors and rubber grommets are correctly mounted.
Note 31 00 MOBILE TABLE LIFT information
Position engine on working surface of table lift A .
Position transmission on working surface of table lift A .
Work surface of table lift B can be adjusted in length (see arrow).
Structure of table lift.
Position adapter (50) on work surface of table lift B for transmission cross-member with coordinates 3/3 and 4/7.
Position adapter (80) on work surface of table lift B under transmission with coordinates 7/4.
Position adapter (60) on work surface of table lift A for front axle support with coordinates 2/1 and 2/8.
Position adapter (10) on work surface of table lift A for swivel bearing with coordinates 4/1 and 5/8.
Position adapter (70) on work surface of table lift A for front axle support with coordinates 7/2 and 7/7.
Possible attachment points of front axle support (1 and 2) and transmission cross-member (3).
Adapt and secure (3) wheel hub adapter (1) on left and right of wheel hub (2).
Release left and right spring strut screws (2).
Tightening torque 31 31 1AZ .
Installation note:
Clean inside contact surface at spring strut dome.
Align spring strut with bore holes on spring strut dome using centering pins and push up.
Release screws (1).
Tightening torque 22 32 3AZ .
Release screws (1) on left and right.
Tightening torque 51 11 6AZ .
Unclip cable tie (2).
Installation note:
Replace faulty cable clips.
Release bolts (1-3).
Carefully lower the front axle complete with the motor and transmission.
Installation note:
Note the installation location and tightening sequence of the screws.
Check threads for damage; if necessary, repair with HELICOIL THREAD INSERTS .
- Bolt (1) M12x45
- Screw (2) M12x165
- Screw (3) M14x60
Tightening torque 31 10 1AZ .
Installation note:
Position the table lift beneath the vehicle.
Adjust the table lift to the vehicle inclination using the adjusting screw (2).
After installation:
- Check and add engine oil.
- Fill and bleed hydraulic system.
- Check line connections for leak tightness
- Check and clear the fault memory