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Why are drum brakes frequently used as the mechanism for parking brakes?
Wiki User
∙ 13y ago
It's quite cheap and easy to create a mechanical connection (typically, a wire that is pulled by a lever) that will hold drum brakes in a "tight" position. That's because brake shoes require relatively little force to push or pull them against the drum ... any turning motion of the drum will tighten them automatically once the shoes come in contact with the drum.
Disc brakes, on the other hand, require more pressure to activate because they are squeezing a rotor and there is no "assist" from the rotor's motion. Also, a disc brake pad is pushing, not pulling (one of the pads is typically fixed), and it would be more difficult to design a secondary pushing mechanism that works with a hydraulic caliper.
Finally, a parking brake system powerful enough to push a pad against the disk might also be strong enough to warp the disk (if the disk was held in the same position for days or weeks)
So the easiest and cheapest way is usually to use a small drum brake at the middle of the rear disc brakes. The parking brake shoes will typically last the life of the vehicle (unless you habitually drive with your parking brake on!)
Wiki User
∙ 13y ago
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What types of brakes are there?
You have hydraulic brakes and air brakes. Hydraulic brakes can be drum or disc. Air brakes can be drum, disc, or wedge. On a lot of medium duty trucks and RVs, the parking brake can be a shaft brake, mounted to the back of the transmission.
What are Types of brakes?
You have hydraulic brakes and air brakes. Hydraulic brakes can be drum or disc. Air brakes can be drum, disc, or wedge. On a lot of medium duty trucks and RVs, the parking brake can be a shaft brake, mounted to the back of the transmission.
Does a 2000 ford explorer have drum brakes?
No , disk brakes front and rear ( the back disk brake rotors have small parking brake shoes inside of a drum portion )
Are disc's brakes the same as drum brakes?
No. Drum brakes are large and contain the mechanism within them. Disc brakes are slim and use calipers to slow them down. Although both are very similar, disc brakes are more advanced and a better option for your car.
How do you get to brakes with drum?
Jut pull of drum if not 4 wd, make sure parking brake off and you may have to tap it a couple times.
How do you adjust parking brake on 2004 Toyota sienna?
if your van has rear drum brakes, adjust them up until there is a slight drag on the brakes. this usually does the trick to tighten up the parking brake.
How do you fix your parking brake if it is stuck on a 2000 dodge caravan?
Parking brakes are all operated by a cable, which you tighten by pulling the lever. If the car has discs brakes all around, the problem is almost always that the cable is rusted in the sheath. If the car has rear drum brakes, the problem can also be a jammed lever inside the drum.
Why manufacturers use different types of brakes on the same car?
Disc brakes are more powerful, but it's easier to add a parking brake to a drum brake. So the front wheels often gets disc brakes, as they do most of the braking anyway, and the rears get drum brakes.
How do you break free a parking brake?
Most cars have drum brakes in rear which the parking brake manipulates. Take off both rear wheels and brake drums. You should see a wire system inside that continues out the rear of the brake housing. This is the parking brake wire. Spray it with WD-40 or an equivilant rust penetrating oil. If this does not work, disconnect the wire from the brake mechanism and the brakes should release.
How do you adjust the drum brakes on a 95 stratus?
INITIAL ADJUSTMENT PROCEDURE Be sure parking brake lever is fully released. Fully apply the vehicles service brakes 2 to 3 times by depressing the brake pedal as far as possible. This will cause the automatic adjuster mechanism to correctly adjust the rear drum brakes. Apply and release the park brake lever one time after the service brakes have been correctly adjusted. This procedure has correctly adjusted the vehicle's rear service brakes.
How do you adjust the brakes on a 97 Chevy Blazer?
The front brakes are disc brakes and are self adjusting. The rears are drum brakes and are also self adjusting providing the self adjusting mechanism is in working order.
How to install rear drum brakes for 94 Nissan Sentra 1.6?
Raise and support vehicle and remove wheel.Release parking brake.Remove brake drum. If drum is difficult to remove, screw in bolt to pull drum out.Remove retainer, return springs, adjuster and shoes.Remove retainer ring with suitable tool, then separate toggle lever and brake shoe.Reverse procedure to install.Adjust brakes and parking brake.
