Remove/install automatic linkage adjuster

AR42.15-B-0010TB

Remove/install automatic linkage adjuster

25.10.2018

Model

934.2, 938.1

with code BB6 (Drum brakes on front and rear axle)

Rear axle

Model

958.2/4

with code BB6 (Drum brakes on front and rear axle)

Rear axle

Rear axle with drum brake (carry out cam S)

1

Pin

6

Thrust washer

11

Brake camshaft

2

Washer

7

Brake wear sensor

12

Regulating screw

3

Cotter pin

8

Bolt

13

Mandrels

4

Bolt

9

Command arm

14

Brake shoes

5

Locking ring

10

Brake adjuster

Seta

Stopper direction



Remove

 Danger

Risk of death caused by vehicle slipping or toppling off during lifting

Only lift vehicle at the lift support points specified by the vehicle manufacturer.

AS00.00-Z-0032-01A

1

Loosen the spring relief screw of the parking brake combined cylinder

 Maintain the working pressure in the system to loose the combined cylinder relief screw.

.Operating pressure

*BE42.20-B-1002-01A

2

Remove the screw (4) and remove the brake wear sensor (7)

AR42.10-B-1050TA

3

Turn the camshaft (11) with the brake adjuster (1) through the fit screw (12)

 Turn the fit screw (12) anticlockwise.

4

Remove the brake drum

.

AR42.10-B-1010TA

5

Remove screw (8) from command arm (9)

6

Remove the cotter pin (3), the washer (2) and the pin (1).

7

Remove brake adjuster (10) and the shim

 The shim is located between the brake adjuster (10) and the bearing stand.

 Open the brake shoes (14) with the appropriate assembly pin (13) and remove the camshaft (11) with the brake adjuster (10).



Install

8

Install the brake adjuster (10) with the camshaft (11) up to stop (arrow)

 Install the shim between the brake adjuster (10) and the bearing stand.

9

Install the pin (1)

 Pin (1) should be inserted tension-free.

10

Install the washer (2) and lock the pin (1) with a new cotter pin (3)

11

Adjust command arm (9) in brake adjuster (10)

.

AR42.15-B-0010-02TA

 .Control lever attachment bolt

*BA42.15-B-1003-01D

12

Check and adjust the axial play of brake camshaft (11)

.

AR42.15-B-1050-02TA

.Axial clearance of camshaft

*BE42.15-B-1001-01E

13

Install the brake drum

.

AR42.10-B-1010TA

14

Install brake wear sensor (7)

AR42.10-B-1050TA

15

Regulate the spring relief screw of the parking brake combined cylinder

 Maintain the working pressure in the system to loose the combined cylinder relief screw.

 KNORR BrakesAccumulator spring relief bolt in relief position

*BA42.10-B-1006-08E

 Other brakesAccumulator spring relief bolt in drive position

*BA42.10-B-1005-08E

.Operating pressure

*BE42.20-B-1002-01A

Values for attesting the mechanical aspects

Number

Designation

Vehicles 958.0/1/2/4, 963.4, 964.0/2/4

BE42.15-B-1001-01E

Axial clearance of camshaft

mm

1,0

Parking brake

Number

Designation

Type 934.2, 938.1, 958.2/4, 963.4, 964.0/2/4

BE42.20-B-1002-01A

Operating pressure

bar

13

 Brake cylinder

Number

Designation

Type 934.241, 938.142, 958.0/1/2/4 with Code BB6 (Drum brakes on ED (VA) and on ET (HA))

BA42.10-B-1005-08E

Accumulator spring relief bolt in drive position

M16x1.5

Nm

35

 Brake cylinder

Number

Designation

Type 934.241, 938.142, 958.0/1/2/4 with Code BB6 (Drum brakes on ED (VA) and on ET (HA))

BA42.10-B-1006-08E

Accumulator spring relief bolt in relief position

Knorr

M16x1.5

Nm

45

 Mechanical brake

Number

Designation

Type 958.0/1/2/4 with Code BB6 (Drum brake mechanism on ED (VA) and on ET (HA))

BA42.15-B-1003-01D

Control lever attachment bolt

Nm

20 ... 25