44 | Cable slack adjuster |
44a | Cable slack adjuster adjusting nut |
45 | Rear brake cables |
105 | Brake shoe adjustment wheel |
S42.20-4501-06
Adjust | |||
Danger | Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. | |
Topical note | General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system | ||
1 | Bed in the parking-brake brakes | Only if the brake shoes were replaced. | |
Bed in the parking brake with a brake force of approx. 1000 N for max. 60 s on the brake test stand. | |||
2 | Remove wheel trim from rear wheels | Only on vehicles with steel rims. | |
3 | Raise vehicle with vehicle lift | ||
4 | Release rear brake cables (45) from cable slack adjuster (44) | ||
5.1 | Remove a wheel bolt from the rear wheels | Only on vehicles with steel rims. | |
5.2 | Remove rear wheels | On vehicles with light alloy rims. | |
6 | Adjust brake shoes | Turn rear wheel slightly, if necessary. Turn brake shoe adjustment wheel (105) until the wheel locks. Then turn through 9 teeth in opposite direction. The freewheel must be guaranteed in the process. | |
7.1 | Screw in wheel bolts and tighten | Only on vehicles with steel rims. | |
Model 636, 639Steel rim wheel bolt | |||
7.2 | Fit rear wheels | On vehicles with light alloy rims. | |
8 | Adjust rear brake cables(45) | ||
9 | Check that rear wheels can turn freely | To do so, press and release pedal of parking brake 2 to 3 times. | |
| Check | ||
10 | Carry out brake test on the test stand | ||
| |||
The parking brake must engage 3 to 4 times and the pedal must exhibit the same brake values on both sides, otherwise repeat adjustment. | |||
11 | Attach wheel trim to rear wheels | Only on vehicles with steel rims. |
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