Resetting the parking brake's adjustment mechanism to its initial position · ar4220d0560a · Mercedes-Benz WIS

AR42.20-D-0560A

Resetting the parking brake's adjustment mechanism to its initial position

20.4.98

MODELS 668, 670 with REAR AXLE 742.501 /505

MODELS 905

D42.10-0107-01

1 Pistons

2 Resetting key 

3 Secondary piston

4 Adjusting nut

5 Adjusting screw

D42.10-0060-01

	Remove
1	Remove brake pads on rear axle		AR42.10-D-1700B
	Adjust
2	Use the reset wrench (2) to press the secondary piston (3) into the piston (1), then turn it back in a clockwise direction, continuing until it seats with the surfaces of the piston (8) and of the dust boot flush	 Pressing in the secondary piston (3) engages the threads in the adjustment screw (5) and the adjustment nut (4).
			*742589016300
3	Loosen the secondary piston (3) one half turn and check to determine whether it turns without undo resistance	 The threads in the adjustment screw (5) and the adjustment nut (4) should no longer be engaged.
	Install
4	Installing rear brake pads		AR42.10-D-1700B

Reset wrench

742 589 01 63 00