Checking brake drum and brake linings for wear

AR42.10-W-1090C

11.9.06

MODEL 970, 972, 976
with drum brake (wedge unit)

W42.10-1035-12

Shown on front axle 731.7

1 Brake pad

A Total lining thickness (new brake lining)

B Minimum lining thickness

	Removing
1	Remove wheels		AR40.10-W-1100A
2	Remove brake drum	Front axle	AR42.10-W-1010C
		Rear axle	AR42.10-W-1010F
	Checking
3	Check brake drum for heat cracking, score marks and wear	 If necessary, skim or replace brake drum. After skimming or replacing brake drums, install new brake linings (1). 	*BE42.10-N-1001-12E
		Replace brake linings.	AR42.10-W-1040B
4	Check thickness of brake linings (1)	 if necessary: 	*BE42.10-N-1001-13E
		Replace brake linings (1).	AR42.10-W-1040B
	Install
5	Install brake drum	Front axle	AR42.10-W-1010C
		Rear axle	AR42.10-W-1010F
6	Mount wheels		AR40.10-W-1100A

Test values for drum brake

Number	Designation			Model 970, 972, 976 drum brake with wedge design


BE42.10-N-1001-12E	Brake drum diameter	Normal	mm	364 (+0.2)
		Repair size I	mm	365.5 (+0.2)
		Repair size II	mm	367 (+0.2)
		Wear limit	mm	368.5

Test and adjustment values for brake shoes

Number	Designation			Model 970, 972, 976 drum brake with wedge design


BE42.10-N-1001-13E	Brake lining thickness	Regular (A)	mm	16
		Repair size I	mm	16.8
		Repair size II	mm	17.6
		Minimum lining thickness (B)	mm	5
		See picture		-