To remove and install the brake shoe springs, you will need the assembly tool mentioned in the text. If you don't have it, remove the rear wheel hub to make the job easier. Fig. 257 shows a section of the parking brake.
Fig. 257. Section of the parking brake.
1 - support,
2 - bolts,
3 - locking bar,
4 - hub body,
5 - tapered roller bearing internal,
6 - inner seal,
7 - oil seal ring,
8 - nut,
9 - spacer sleeve,
10 - parking brake cable,
11 - protective cover,
12 - brake disc,
13 - supporting partition,
14 - mounting pin,
15 - rear wheel hub,
16 - outer tapered roller bearing,
17 - dust protection ring,
18 - outer seal,
19 - parking brake base,
20 - brake pads,
21 - emphasis,
22 - adjusting nut,
23 - spacer sleeve,
24 - pressure spring,
25 - bolt with spring washer,
26 - pin,
27 - spacer stopper,
28 - Allen bolt and spring washer,
29 - upper spring,
30 - bolt and spring washer,
31 - lower spring.
Remove the caliper with the brake hose.
Remove the brake disc.
Disconnect the lower spring.
Turn the rear wheel hub so that the threaded hole in the hub is positioned opposite the spring (1) in Fig. 258.
Fig. 258. Removing and installing the parking brake pads.
1 - pressure spring,
2 - brake pads,
3 - stop,
4 - adjusting nut,
5 - parking brake base,
6 - protective cover,
7 - spacer sleeve,
8 - upper spring,
9 - lower spring,
10 - supporting partition,
11 - spacer stopper.
Using the assembly tool 112 589 09 061 00, pull back the spring, turn it 90° and remove the spring.
Remove the spring from the second shoe.
Stretch the pads relative to each other so that they can be removed through the rear wheel hub.
Remove the pin from the expansion stop.
Disconnect the spacer stop from the parking brake cable (see fig. 259).
Fig. 259. Section of the spacer stopper. Designations are shown in Fig. 257.
When installing brake pads, perform the following work:
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Apply Molycote paste to all working surfaces of the expansion stopper.
Install the drive cable mounting pin and spacer stop.
Press the expansion stopper against the protective cover.
Apply long-life grease to the threads of the stop and the cylindrical surface of the adjusting nut.
Assemble the adjusting device. Screw the stop all the way into the spacer sleeve.
Install the adjusting device between the ends of the brake shoes so that the adjusting nut is in front in the direction of travel.
Install the upper spring onto the brake shoes.
Pull the brake pads apart, place them on the rear wheel hub, and install a spacer stop between the ends of the pads.
Place the pressure spring into the brake shoe.
Using the above mentioned mounting tool, stretch the pressure spring through the threaded hole in the hub, turn it 90° and secure it to the protective cover.
Using assembly tool 116 589 016 200, install the spring first on one brake shoe and then on the other.
Install the brake disc and caliper.
Adjust the parking brake.