Remove/install brake shoes of parking brake - AR42.20-P-0530RT

MODEL 251 

Shown on model 164.1, left side 

Fig 1: Identifying Brake Shoes Of Parking Brake Remove/Install Components - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

29.11.11

Long-life grease repair materials replaced by hot-grease paste

Operation step 8, 9

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury  to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
1	Release parking brake
2	Raise vehicle		AR00.60-P-1000RT
3	Remove rear wheels		AP40.10-P-4050RT
4	Remove brake disks on rear axle		AR42.10-P-0220RT
5	Unhook retracting spring (6) using removal and installation tool		Figure
6	Remove retaining springs (7).	Compress retaining springs (7) and turn counterclockwise or clockwise through 90°.
7	Remove brake shoes (1) with adjusting mechanism (5) and retracting spring (2)	If the brake shoes (1) are burnt or the brake disk surfaces are damaged, the brake shoes (1), retracting spring (2, 6), retaining springs (7) and brake disks should be replaced.
8	Remove retracting spring (2) and adjusting mechanism (5)	Apply light coating of grease to thread on thrust piece (4) and inner cylinder of adjusting mechanism (5). Turn back adjusting mechanism (5) and mount thrust piece (4) as follows: Left side: Left thrust piece to lower brake shoes (1). Right side: Right thrust piece to upper brake shoes (1).
		Hot lubricating paste	*BR00.45-Z-1005-06A
9	Remove expansion lock (8)	For this purpose, fold down expansion lock (8) and press out of the rear parking brake cable. Apply light coating of grease to slide surfaces on expansion lock (8).
		Hot lubricating paste	*BR00.45-Z-1005-06A
	Checking
10	Check parking-brake brake cables	Check for ease of movement and chafing marks, if necessary: ↓
		Replace front parking brake cable.	AR42.20-P-0520RT
		Replace rear parking brake cable.	AR42.20-P-0525RT
11	Install in the reverse order
12	Adjust parking brake		AR42.20-P-0540RT
13	Bed in parking brake according to instructions.		AP42.20-P-4290-01BA
	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.	AS00.00-Z-0019-01A
14	Carry out brake test on the test stand		AP42.00-P-4290BA

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

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1005-06A	Paste, hot lubrication 1 kg, DB supply specification 6879.20	A 000 989 76 51