Adjust parking brake - AR42.20-P-0540V

MODEL 171.4 

Fig 1: Identifying Brake Disk, Brake Shoe And Thumbwheel

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

23.8.05

Clearance adjustment value changed to 10 teeth

Step 5

	Remove
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the and position the four support plates below the lifting platform support points specified by the vehicle manufacturer.	-
	Notes on repairs to brake system		AH42.00-P-0003-01A
1	Release parking brake
2	Raise vehicle so that wheels are clear of the ground		AR00.60-P-1000V
3	Unscrew one wheel bolt on the left and right rear wheel	Light alloy wheels must be removed due to the risk of damage.
	Remove/install wheels, rotate if necessary.		AP40.10-P-4050V
	Adjust
4	Bring brake shoes (103) into contact with parking brake drum	Rotate adjusting wheel (c) by means of a screwdriver until the brake shoes (103) abut the parking brake drum and the rear wheel or brake disk (61) can no longer be turned by hand. Direction for bringing brake shoes (103) into contact: Turn left adjusting wheel (c) from the top downwards and right adjusting wheel (c) from the bottom upwards.
5	Loosen adjusting wheel (c)	Release left and right adjusting wheel (c) by the same number of teeth (10 teeth). It must be possible to rotate the rear wheel or brake disk (61) completely freely by hand.
	Check
6	Operate the parking brake lever several times and check the travel of the parking brake lever		*BE42.20-P-1005-01A
7	Loosen parking brake and check unobstructed movement of rear wheels or brake disks (61)
	Install
8	Fit wheel bolts or light alloy wheels
	Remove/install wheels, rotate if necessary.		AP40.10-P-4050V
	Risk of death  caused by body parts being pulled in by rotating vehicle wheels and roller dynamometer rollers	Do not insert your hand into rotating parts. Wear closed and snug-fitting work clothes. Safeguard areas with rotating vehicle parts and dynamometer rollers against unauthorized access. Safeguard roller dynamometer from unauthorized access.	-
9	Carry out brake test on the test stand
	Brake testing on test stand		AP42.00-P-4290V

TEST VALUES FOR PARKING BRAKE

Number	Designation	Model 171
BE42.20-P-1005-01A	Number of notches at which the parking brake must be adjusted if up to that point there is insufficient braking effect	5