How often should rear brake shoes be replaced?
How often should rear brake shoes be replaced?
The replacement of rear shoe hardware should be suggested each time the rear brake shoes are replaced to prevent this from happening. The shoe lands or “bosses” are an often overlooked item when looking for the cause of a rear wheel lockup condition.
What kind of brake does a GM FWD vehicle use?
A prime example of this are GM FWD vehicles that are equipped with duo-servo rear drum brakes. Most FWD vehicles use a non-servo rear drum brake because of the braking balance of a FWD vehicle. These GM vehicles are “over-braked” in the rear which makes them very sensitive to rear brake problems.
What causes rear wheel lockup on Phoenix brakes?
The shoe lands or “bosses” are an often overlooked item when looking for the cause of a rear wheel lockup condition. The shoe lands keep the brake shoes square with the drum and provide a friction surface for the shoes to move against. Over time the bosses can become grooved and corroded as in Figure 61.6.
Can a out of round brake drum cause one wheel lockup?
An out of round brake drum or drums that vary in diameter too much from side to side could cause a one wheel lockup condition (Figure 61.8). Measuring drum runout or out of roundness is not easy in the field. Current micrometers do not allow a repeatable measurement to be taken.
When do you adjust the rear brake on a car?
Most FWD vehicles self adjust when braking while the vehicle is moving forward (See Figure 61.4). Once the rears are quick set test drive the vehicle to finish the adjustment process.
What’s the best way to replace brake Springs?
Align the new brake shoes with the old set on a flat table or bench and start removing brake springs and swapping them to the new shoe set. Try not to get the linings of the new shoe set dirty as this can distort their braking ability. If dirt or grease does get on the linings try to use a small amount of brake cleaner to help remove it.
What should I do if my brake caliper is stuck?
Check the rubber boots and remove, clean, and lubricate the guide pins again. They can be a pain to remove when they have been stuck for a while – so a torch is a must to warm them up when trying to remove them. If your sticking caliper problem comes from the vehicle’s rear, there is a big chance of a problem with the parking brake.
How do you adjust the brakes on a Ford drum?
Turn the star wheel with the brake-adjusting tool, until the shoes contact the drum. The shoes should not be so tight that the drum cannot turn, but there should be a slight drag on the drum as it is turned. Reinstall the wheels and lower the vehicle.
Can a brake leak affect both front and rear brakes?
That way, if there is a leak in one part of the system, it should only affect one front brake and one rear brake. If this is what is going on, you need to identify and replace the faulty part.
When to use handbrake or front brake caliper?
The handbrake prevents the car from rolling when the car is at a complete halt. In extreme circumstances, the driver can use the handbrake to stop the car when the brakes fail. The front brakes often play a greater role in bringing the car to a halt than the rear ones. This does not mean you should replace one and ignore the other.
Check the rubber boots and remove, clean, and lubricate the guide pins again. They can be a pain to remove when they have been stuck for a while – so a torch is a must to warm them up when trying to remove them. If your sticking caliper problem comes from the vehicle’s rear, there is a big chance of a problem with the parking brake.
