Automatic brake adjusters - Checking wheel cylinder release travel · ap4210b4291c · Mercedes-Benz WIS

AP42.10-B-4291C

Automatic brake adjusters - Checking wheel cylinder release travel

12.02.16

Vehicle 688 with Cumbustion engine 374.953, 374.986, 374.988, 374.991, 374.993, 374.996, 906.924

B42.15-0033-06

A Camshaft radial clearance

B Camshaft axial clearance

a Camshaft

b Spacing washer

c Seal

	Check brake inspection points on rear axle
1	Check that the camshaft bushings need to be replaced by inspecting the camshaft radial clearance (A).	 If camshaft radial clearance (A) is greater than 0.8 mm, replace the bushings.	*BE42.10-B-1001-12C
		 If clearance (A) remains greater than 0.8 mm after replacing the bushings, replace the camshaft.
2	Check camshaft (a) axial clearance (B)	 If camshaft axial clearance (B) is greater than 1.5 mm, add spacing washers (b).	*BE42.10-B-1002-12C
3	Install grease seals (c) to the chamber support and the bracket assembly, both seals with the lips facing brake adjuster
4	Check if the brake drums have cracks, overheating signs and stains, corrosion or scratches. Replace damaged brake drums	 Maximum permissible diameter for grinding the brake drums	*BE42.10-B-1003-12C

Drum brake

Número	Denominação		Vehicle 688.156 with rear axle 743.415


BE42.10-B-1001-12C	Radial clearance of axle	mm	0.8
BE42.10-B-1002-12C	Axial clearance of expanding axle	mm	1.5
BE42.10-B-1003-12C	Maximum diameter of drum for rework	mm	328