Removing and installing brake shoes of parking brake - AR42.20-P-0530V

MODELS 171.442 /454 /456 /473 

Shown on Model 171.442 /456 

Fig 1: Identifying Brake Shoes Of Parking Brake - AR42 Shown On Model 171.442 /456

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the lifting platform and position the four support plates at 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	Hoist vehicle with lifting platform until wheels are free		AR00.60-P-1000V
3	Remove rear wheels.
	Remove/install wheels, rotate if necessary		AP40.10-P-4050V
4	Remove brake disks on rear axle	Model 171.473	AR42.10-P-0220AC
		Model 171.442 /454 /456	AR42.10-P-0220V
5	Unhook retracting spring (111) using extraction and insertion tool (040)	Removal and installation tool	Fig 2
6	Remove retaining springs (107) using installation tool (041)	Compress retaining springs (107) and turn counterclockwise or clockwise through 90°.
		Installation tool	Fig 3
7	Remove brake shoes (103) with adjusting mechanism (105) and retracting spring (112)	If the brake shoes (103) are burnt or the brake disk surfaces are damaged, the brake shoes (103), retracting spring (111, 112), as well as retaining springs (107) and brake disks should be replaced.
8	Remove retracting spring (112) and adjusting mechanism (105)	Installation:  Grease the thread on the thrust piece (104) and inner cylinder of the adjusting mechanism (105) lightly with MB-long-life grease. Turn back the adjusting mechanism (105) and mount so that the thrust piece (104) abuts the upper brake shoe.
		Long-life grease	*BR00.45-Z-1001-06A
9	Remove expanding lock (109)	To do this, fold up the expanding lock (109) and press the bolt (109a) out of the expanding lock (109) and rear cable (86) of the parking brake. Installation:  Grease bolt (109a) and bearing surfaces and slide surfaces on the expanding lock (109) lightly with MB long-life grease.
		Long-life grease	*BR00.45-Z-1001-06A
	Check
10	Check parking brake cables	Check for ease of movement and chafing marks, replace if necessary: ↓
		Replace front parking brake cable.	AR42.20-P-0520V
		Replace rear parking brake cable.	AR42.20-P-0525V
11	Install in the reverse order
12	Adjust parking brake		AR42.20-P-0540V
13	Bed in the parking brake brakes
	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.
14	Carry out brake test on the test stand
	Brake testing on test stand		AP42.00-P-4290V

Fig 2: Identifying Removal And Installation Tool (116 589 01 62 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Installation Tool (112 589 09 61 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1001-06A	Long-life grease	A 000 989 63 51