B. Removal and Installation of Center Differential Lock (ZS) Piston

Dismantling and Assembling Transfer Case

B. Removal and Installation of Center Differential Lock (ZS) Piston

Preceding work:
Sun gear shaft removed (28-300, section A) A. Removal and Installation of Sun Gear Shaft

Special Tools:

Insert inner bushing (011) 124 589 05 14 00.

Insert and screw on outer bushing (012) 124 589 03 14 00.

Install and screw on assembly fixture (013) 124 589 04 14 00 at center differential lock (ZS) piston (7).

Apply compressed air to hydraulic connection of center differential lock (ZS) (31), press out center (31) differential piston (ZS) (7).

Coat sealing lip of center differential lock piston (ZS) (7) with hydraulic oil.

Insert center differential lock piston (ZS) (7) with assembly fixture 124 589 04 14 00 into outer bushing (012), press in.
Note pilot pin.
Note gap dimension "B" 30.5 ± 1 mm.

Check center differential lock piston (ZS) (7) for leaks (28-303). Non-Trouble Code Procedures




Gap dimension "B"
Check gap dimension"B" (B = 30.5 ± 1 mm),by measuring on the assembly fixture (013)124 589 04 14 00 to locating plate using depth caliper gauge.

If the gap dimension "B" is incorrect, withdraw center differential lock (ZS) piston again and check the position of the springs (28-300, section C). C. Removal and Installation of Outer Multi-Disk Carrier of Front Axle Drive Train (AV)