Rear Wheel Brake Shoes - Volvo 164, 1970 Service Manual

Fig. 5-25. Rear wheel brake unit fitted
l. Altoching screw 4. Reor wheel broke co liper
2. Broke line
5. Ve nling nippl e
3. Altaching screw
Rear wheel brake shoes
REMOVING
When working with the hydraulic system, observe
the instructions given under "Cleaning" and "Brake
fluid" Group 50.
1. Remove the hub caps and slacken the wheel nuts
slightly. Temporari ly block the venting hole in the
brake fluid conta iner cap to reduce leakage.
2. Jack up the front end and place blocks under the
rear axle. Remove the wheels. Re lease the hand -
brake.
Fig. 5-26. Removing the rear wheel brake cal iper
5: 14
3. Disconnect the pipe connection (2, Fig . 5-25) from
the caliper and fit a protective cover on the brake
line. Remove the attaching screws (1 and 3, Fig.
5-25). Remove the brake caliper, see Fig . 5-26.
DISMANTLING
1. Remove the hairpin -s haped retainning clips for the
retaining pins. Pu ll out one of the retaining pins
while keeping the damping springs in position .
Remove the springs and then the other retaining
pin . Pu ll out the pads and the spacers, see Fig.
5-18.
2. Remove the dust cover retaining tings and the
dust covers. Place the caliper in a vice as shown
in Fig. 5-27. Fit tool SYO 2809 and press one of
the pistons down to the bottom. Fit a suitable
venting connection, see Fig. 5-4, in the ca liper.
Place a hose piece in the caliper and force out
the other piston. The pressure required may go
up to about 7 kg/cm
2
(100 Ib.sq .in .). Remove the
piston.
3. Fit the tool as shown in Fig. 5-28 with a suitab le
rubber sea ling A for the free cylinder. Press out
the piston. Remove the piston and the tool.
4. Remove the sealing rings with help of a blunt
tool. Take care not to damage the edges of the
grooves. Screw out the venting nipple.
N.B. Both halves of the brake caliper should not be
separated. The reason for this is, that assembling of
these halves requires pressure testing equipment and
special fluid for the screws.
Fig. 5-27. Removing the piston