Page 76
Operation 7 Rear brakes - fitting new shoes
to remove (Figure 5)
1. Jack up the rear of the vehicle and secure on stands.
2. Remove the road wheel.
3. Slacken off the brake adjuster and remove the drum.
4. Prise the tongue of the shoe from the wheel cylinder piston
groove, adjacent to the handbrake operating lever.
5. Lift the other end of the shoe from the slot in the adjuster.
6. Lever the second shoe from the piston and adjuster,
disengaging the shoe from the handbrake lever.
7. Remove both shoes complete with springs and put a rubber
band around the wheel cylinder to hold the pistons in place.
8. Clean the back plate using a vacuum cleaner or wipe out
with a damp cloth. Remove all traces of dust. The old-established
practice of blowing off with an air line is NOT recommended as it
represents a potential health hazard.
9. Inspect the wheel cylinder for leakage and check the
condition of the rubber dust seals.
10. Inspect the adjuster for ease of operation. Lubricate if
necessary using "copaslip" or a proprietary brake grease.
To replace
1. Attach new springs to the new shoes. Arrange the springs
so they are on the back plate side f the shoe webs with the single coil
spring adjacent to the adjuster.
2. Remove the rubber band and position the shoes on the
back plate so that the handbrake lever locates in the aperture in the
web of the shoe.
3. Engage the tongues of the shoe into the slots in the
adjuster and wheel cylinder.
4. Repeat with the other shoe.
5. refit the brake drum after ensuring it is clean and free from
grease or contaminant.
6. Refit the road wheel and adjust the brake.
Note: Brake shoes MUST be changed in axle sets. Repeat for the
opposite rear wheel.
7. Lower the vehicle and road test to check braking
performance.
Operation 8 Rear wheel cylinders - removal & replacement
Faulty rear wheel cylinders will show similar symptoms to faulty front
ones. If the vehicle has a tendency to gently pull to the left or right
under braking, a rear cylinder might be the cause.
To remove
1. Remove the brake shoes as previously described.
2. Disconnect the hydraulic pipe from the cylinder and plug to
avoid leakage and dirt ingress. Remove the bleed nipple.
3. Prise off the wheel cylinder retaining circlip and remove the
cylinder.
Replace in reverse order. Bleed the brakes.
Note: The circlip MUST be replaced with a new one and can be
awkward to fit.
Safety Note: Brake shoes contaminated by leaking fluid must always
be replaced. On no account try to clean contaminants from brake
shoe linings.
Operation 9 Master cylinder - removal & replacement
A faulty master cylinder can be diagnosed by excessive pedal
movement or signs of leakage around the rubber sealing gaiter and
push rod. A very stiff brake pedal might indicate a seized master
cylinder piston. Overhaul is not advised with complete replacement of
a faulty or worn unit being the recommended course of action.
To remove
1. From within the engine compartment, prise out the
grommet located on top of the driver's foot well to gain access to the
split pin and clevis connecting the master cylinder to the brake pedal.
Remove the split pin and washer.
2. From within the foot well, remove the clevis pin and
disconnect the master cylinder.
3. Disconnect the fluid pipe from the master cylinder and plug
to avoid leakage or dirt ingress.
4. Unscrew the nut and set screw compete with lock washers,
securing the master cylinder to the body and pedal bracket and
remove the master cylinder.
Replace in reverse order. Bleed the brakes.
Brake pedal assembly
Removal and dismantling / re-assembly of the brake pedal assembly is
explained in Section H - The clutch.
Operation 10 Handbrake cable - replacement
To replace handbrake cable (Figure 6)
1. With the handbrake in the off position, remove the split
pins washers and clevis pins and disconnect the cable from the right
and left-hand rear brake plates.
2. Remove the inner cables from the cable guides and release
the outer cables from the stop brackets on the axle tubes.
3. Pull down the handbrake pulley and detach from the clevis
by removing the split pin, washer and clevis pin.
4. Slacken the adjuster locking nut, release the cable from the
handbrake mounting plate and withdraw the cable from the vehicle.
5. Locate the new cable in the handbrake mounting plate and
secure with the lock nuts.
6. Fit the pulley in the cable and secure with the clevis pin,
washer and a new spilt pin.
7. Locate the cables in the axle stops and feed the inners
around the cable guides.
8. Connect the right and left-hand cables to the operating
arms on the brake plates with the clevis pins, washers and new split
pins.
9. Adjust the hand brake.
Operation 11 Handbrake lever - removal & replacement
1. With the handbrake off, remove the split pin, washer and
clevis pin connecting the handbrake cable pulley clevis to the
handbrake lever.
2. From inside the vehicle, peel back the carpet around the
handbrake lever. Unscrew three set screws, lock washers and coach
washers and detach the handbrake lever from the body mounting.
Replace in the reverse order, and re-adjust the handbrake if
necessary.
To Next Page
Loading...
