How does wheel braking work in a car?
Since the braking happens at the wheel and not the power source, in this case, it is known as wheel braking. In vehicles, this is achieved by pressing on the brake pedal or lever, which in turn actuates the braking mechanisms. Below, we will discuss wheel braking in detail.
How is the parking brake binding on a car?
Parking Brake Binding All cars run the parking brake to just the rear wheels and as you know, some vehicles have calipers at the rear and others will have drum brakes. The parking brake on most cars are still operated by pulling a lever which pulls a cable which applies the rear brakes.
What causes rear wheel to lock up when braking?
Problem: One or both rear wheels lockup during braking or the rear end of the car squats when braking. Cause: Rear Wheel lockup or squatting has many causes. Here is the list of possible causes: Service and parking brake adjustment. Rear brake hardware. Shoe lands or bosses. GM clip in wheel cylinders. Brake drum condition.
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.
How do you reassemble a pedal brake hub?
Reassemble clutch. Grease spring, place washer inside clutch, and turn spring into place. Turn with spring wrap direction (clockwise). Grease axle threads of axle. Install left side cone on axle. Pack grease inside cage of bearings. Install bearings on cone. Ball bearings face cone surface.
What is the hold off valve on a disc brake system?
In a brake system with disc front and drum rear, there is a valve in the system known as a metering valve or hold-off valve. This valve basically allows the rear drums to apply first in the system.
How do you make a drum brake assembly?
Lube contact areas on SA arm and pivot put guide on anchor. place SA arm with pivot on rear shoe with nail, tube washer & straight spring Add actuator link, follow with overide spring from arm to pivot (next pic) Place return spring under SA arm. note placement of pivot and link Press shoes against anchor.
How do you overhaul a coaster brake wheel?
Coaster Hub Overhaul (Pedal Brake Hub) Lift off wheel from axle assembly. Use care, as the brake shoe or other parts may fall out. Turn axle assemble over in the vise. Hold the brake arm as a lever, and use a wrench on.