31 10 001 Completely Removing and Installing Front Axle With Engine and Transmission
31 10 001 Completely removing and installing front axle with engine and transmission (N63/S63 E70/E71)Special tools required:
Important!
Removal weight approx. 250 kg to 450 kg.
Check payload of vehicle and empty if necessary
Load front footwell with sandbags if necessary, approx. 200 kg.
Follow safety information of aggregate table!
Necessary preliminary work:
^ Position vehicle on vehicle hoist so its weight is centered.
^ Disconnect the battery
^ Move engine compartment lid into service position
^ Suction off air conditioning.
^ Remove both intake silencer housings.
^ Remove charge air cooler expansion tank.
^ Remove coolant expansion tank.
^ Remove fan cowl with electric fan.
^ Remove auxiliary coolant pump for intercooler
^ Remove complete propeller shaft.
^ Remove front right wheel arch cover.
^ Release feed and return lines for engine oil cooler
^ Remove brake caliper on left and right
^ Detach steering shaft at steering box
Release vacuum line (3) for brake-servo assistance at the vacuum pump.
Unlock coolant hose (1) and detach from coolant pipe.
Release engine wiring harness from electronics box and secure on engine against falling off.
Unlock and detach all connectors (1) on DME control unit.
Unlock plug on electronics box fan and disconnect.
Unlock and detach terminal strip (2).
Unlock all plugs on plug strip (3) and detach.
Unlock plug strip (3) and remove towards top.
Release screws and remove retaining bar (1).
Unlock upper part (2) of partition seal in direction of arrow and remove.
Release grommets (3) for wiring harnesses from lower section of partition seal and from electronics box.
Installation Note:
Make sure grommets are correctly seated so as to prevent ingress of moisture.
Unlock and detach vacuum line (1) from vacuum pump.
Release screws (1).
Detach line.
Tightening torque: 64 53 5AZ
Installation Note:
Replace sealing rings and moisten with refrigerant oil.
Unlock and disconnect fuel delivery line (1), seal off with special tool 13 5 160.
Seal off fuel delivery line (2) with special tool 13 5 162.
Release nut and remove screw (3).
Fix brake caliper (1) with a suitable auxiliary materials (2).
Installation Note:
Keep wishbone to swivel bearing connection clean and free from oil and grease.
Note direction of insertion of screw.
Screw must rest correctly in groove of ball stud.
Replace self-locking nut.
Tightening torque: 31 12 6AZ
Release nut (1) and remove screw (2).
Installation Note:
Replace screw and nut.
Note direction of insertion of screw.
Tighten down screw connection in normal position.
Tightening torque 31 12 3AZ.
Detach plug connection of speed sensor at front left and right.
Turn steering wheel.
Use two tire levers on both sides to unlock the drive shaft of the front axle differential.
Detach coolant hose (1) from auxiliary water pump (2).
Slacken nut (1).
Release holder (2) from support plate (3).
Remove screws (1 to 4).
Detach pressure line of swivel motor (5).
Detach pressure line of swivel motor (6).
Pull off expandable hose for Adaptive Drive (7).
Pull off return line (8).
Installation Note:
Replace all gaskets.
Disengage engine oil pipe (1) from backer (2).
Important!
Coordinate determination always begins at the top.
Position engine assembly on table top A.
Position transmission on table top B.
Table top is adjustable in a longitudinal direction (see arrow).
Structure of table lift.
Position retaining elements (2) with fixture (40) on table top B for cross member at coordinates 3/2.
Position retaining elements (3) with fixture (50) on table top B for cross member at coordinates 2/6.
Position an additional retaining element (4) with fixture (80) on table top B under transmission at coordinates 8/5 and 8/6.
Position retaining elements (1) with fixtures (60) on table top A for front axle support at coordinates 3/2 -7/2 - 3/7 and 7/7.
Position fixture (5) on table top A for swivel bearing at coordinates 4/1 and 5/8.
Note:
Possible mounting points for front axle support and transmission.
Note position (1 to 4).
Secure fixture of swivel bearing (1) on brake disc with wheel studs (2).
Secure adjusting screw (3).
Release screws.
Tightening torque, 22 32 4AZ.
Release screws (1, 2).
Installation Note:
Tighten down first screws (1) and then screws (2).
Tightening torque: 31 10 1AZ.
With lift truck 81 22 2 184 136 and the aid of another person, carefully remove engine with transmission from below in front axle support combination.
Note:
Graphic diagram N63 Hybrid
Installation Note:
The inclination of the table lift (1) can be adjusted using adjusting screws (2).
Note:
Reassemble the vehicle.
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