In the article, we will consider the adjustment and repair work of the mechanism and drive of the car handbrake
The parking brake is adjustable if the lever travel has become more than half of its maximum travel (7-8 clicks), or the car is not held on a slope
Hanging the rear wheel of the car
We turn on the neutral gear in the transfer case and turn off the front axle
Move the parking brake lever to the frontmost position
We tighten the adjusting screw with a key until the handbrake brake drum stops turning by hand
We unscrew the adjusting screw by 5-6 clicks (1/3-1/2 turn of the screw) so that the drum rotates freely
We adjust the thrust of the drive, for this we unscrew the lock nut of the adjusting fork with a key 13
Unpin with pliers and remove the pin connecting the plug and the expander drive lever
Turning the adjusting fork, we combine the hole in the fork and the lever, install the pin, cotter it and tighten the locknut
Checking the correct adjustment of the parking brake
A vehicle on a 23% slope should be held by the parking brake when the lever is retracted 4-5 clicks
Replacing handbrake pads
We install the car on a viewing ditch or lift
We remove the rear driveshaft, as indicated in the article "How to remove the cardan drive of a UAZ-3151, -31512, -31514, -31519"
We unscrew the screw of the adjusting device, we bring the pads together, as indicated above
Use a screwdriver to unscrew the two screws securing the drum
We bring the jack under the gearbox housing, raise the power plant so that the cross member does not interfere with the removal of the brake drum
Remove the brake drum
On the inside, hold the brake shoe rod
Press on the cup, compressing the spring
Turn the spring cup 90°. In this case, the slot on the cup will be aligned with the protrusions of the rod
Remove the cup with the spring and take out the pad rods
With a large screwdriver, we squeeze the lower edge of the block and remove it from the groove of the piston of the adjusting mechanism
Pull back the upper edge of the block with your hand and remove the block from the groove of the expander piston
Disconnect the coupling springs from the shoe and remove the shoe
We also remove another block
Install the pads in reverse order
Before installing the drum, disconnect the adjusting fork from the expander drive lever
In this case, the pads will be completely brought together. We adjust the parking brake drive, as described above
Removing the parking brake mechanism
Install the car on the inspection ditch
Move the handbrake lever to the extreme forward position
With a head of 10, unscrew the eleven bolts securing the left side of the floor cladding
Remove the rubber seals of the handbrake levers and gearshift levers from the lining flanges and pass them into the holes
Remove the left side of the floor cladding
Disconnect the adjusting fork from the expander drive lever
We unscrew the two nuts securing the handbrake lever bracket with a 17 wrench, holding the bolts with a 14 wrench
Remove the lever with the drive rod
Remove the brake drum and pads
With a head of 10, unscrew the six bolts securing the right side of the floor cladding
Remove the right side of the cladding
Unpin the spreader drive lever with pliers
Remove the lever from the axle
We unscrew the two bolts of the expander with a 14 wrench
Remove the expanding device, holding its pistons from falling out
On the other side of the shield, remove the special washer
With a 14 head, unscrew the two bolts securing the adjusting device
Remove the adjustment device
We assemble the parking brake mechanism in reverse order
When installing the expanding and adjusting devices, we orient them in such a way that the lugs for fastening the coupling springs made on their bodies face the transfer case shaft