AR42.10-W-1050A | Remove/install brake wear sensor | 25.1.11 |
MODEL 374, 375.3, 930, 932, 933, 934, 940, 942, 943, 944, 949, 950, 952, 953, 954, 958.2 /4
W42.15-1012-12
Shown on rear axle
1 Brake adjuster
2 Guide bolt
3 Sensor cable
4 Retaining ring
5 Shim
6 Brake wear sensor
7 Marking arrow
8 Brake camshaft
9 Adjustment screw
10 Tooth lock washer (made of plastic, up to axle no. V 937618)
11 Tooth lock washer (made of steel, as of axle no. V 937619)
A Version (up to axle no. V 937618)
B Version (as of axle no. V 937619)
Arrow: Zero position marking
Modification notes
21.1.11 | Brake wear sensor changed, added. | ||
Check version of removed brake wear sensor (6), added. | Operation step 6 | ||
Determine thick of new spacer washer (5), added. | Step 11 |
| Removing | ||
| Brake wear sensor changed | As of axle no. V 937619 | |
1 | Turn brake shoe on brake adjuster (1) all the way back | ||
2 | Detach sensor line (3) from brake wear sensor (6) | ||
3 | Remove locking ring (4) from brake camshaft (8) | ||
4 | Remove spacer washer (5) from brake camshaft (8) | ||
5 | Remove brake wear sensor (6) with guide screw (2) from brake adjuster (1) | ||
Checking | |||
6 | Check version of removed brake wear sensor (6) | Only up to axle no. V 937618 and if the brake wear sensor (6) is to be replaced. | |
| Install | ||
7 | Check and, if necessary, adjust zero position marking (arrow) on brake wear sensor (6) | The marks on the tooth lock washer (10 or 11) and on the housing must line up. | |
8 | Undo guide screw head (2) on brake wear sensor (6) by one half turn | ||
9 | Slide brake wear sensor (6) onto brake camshaft (8) | Cast marking arrow (7) on brake wear sensor (6) must point in operating direction of the brake adjuster (1). | |
10 | Align guide screw (2) on brake wear sensor (6) by sliding it in the elongated hole to the hole in the brake adjuster (1) and then tighten the guide screw head (2) | ||
11 | Determine thickness of new spacer washer (5): | Only when the version (A) was installed and replaced by version (B). | |
In this instance the previous spacer washer (5) must be replaced by a 2.0 mm thicker new spacer washer (5). | |||
12 | Fit spacer washer (5) onto brake camshaft (8) | ||
13 | Install locking ring (4) on brake camshaft (8) | ||
14 | Connect sensor line (3) to brake wear sensor (6) | | |
15 | Adjust clearance of brake shoes |
Drum brake
Number | Designation | Model | Model | Model | |
BA42.10-N-1004-16A | Bolt, sensor cable to brake wear sensor | Nm | 1 | 1 | 1 |
Drum brake