Automatic brake adjusters - Checking wheel cylinder release travel

AP42.10-W-4291A

Automatic brake adjusters - Checking wheel cylinder release travel

03.09.2015

Model

374.5/6

with drum brake

Model

375.3

with drum brake

Model

930, 932, 933, 934

with drum brake

Model

940.1, 942, 943, 944.1

with drum brake

Model

950, 952, 953, 954

with drum brake

1

Move brake force regulator of automatic load-dependent brake system to full-load position

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

2

Start engine

3

Fill compressed air system until operating pressure is reached

 Keep the compressed air system at operating pressure while testing the individual linkage adjusters.

4

Secure vehicle against rolling

5

Release parking brake

6

Apply service brake and measure release travel of wheel brake cylinders between released position and full braking position

 The release travel must be within the specified values.

Release travel of wheel brake cylinder

*BE42.10-N-1003-12A

If the values are outside the tolerance



Repair or replace automatic linkage adjuster, subject to separate repair order

7

Reset brake force regulator to partial load position (original position)

8

Turn off engine

Test values for drum brake

Number

Designation

Model 374
Model 375.3, 958

Model 930, 932, 933, 934, 940, 942, 943, 944, 950, 952, 953, 954

BE42.10-N-1003-12A

Release travel of wheel brake cylinder

mm

30...40

30...40