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What is the difference between primary brakes and the secondary brakes?
Wiki User
∙ 10y ago
Primary brakes are situated at the front wheels and provide about 70% of a vehicle's braking power. Your secondary brakes are located at the rear wheels and only provide about 30% of a vehicle's braking power.
Wiki User
∙ 10y ago
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What is the difference between twin leading and leading and trailing brakes?
Leading brakes are the primary braking system. ON a car, for example, the front breaks apply more braking force than the rear (trailing) brakes do. There is a slight difference in this pressure so a vehicle does not brake out of control.
When a driver depresses the brake pedal what air brake system is he using?
If the vehicle has brakes on the steer axle (which any truck from 1975 and newer will have), they're using both the primary and secondary system - primary for the drive axle and trailer brakes, secondary for the steer axle brakes, and often for any additional lift axle brakes, as well.
Dual air brake system?
Not certain what your question is here. Every vehicle from 1976 - when FMVSS 121 became law - onwards will have a dual circuit application system, consisting of a primary air system and a secondary air system. Some systems retain a wet tank; some do not, and instead pipe air from the compressor directly into the primary and secondary supply tanks. Most often, the primary air system will be the system which actuates the brakes on the drive axle, as well as the trailer brakes when the foot pedal is applied. And the secondary circuit usually actuates the steer axle brakes, and the trailer brakes when the Johnson bar is used.
What is the difference between a ttr125 and a ttr125 lw?
I think one has disc brakes & the other has drum brakes but not sure which is which.
What happens if the air pressure is lost from the primary brakes system?
The treadle (foot valve) moves downwards until the secondary air system can be actuated mechanically.
What is the difference between regular and HD brakes on Cadillac deville?
hd brakes will last longer and stop a lot eaiser
Have a 93 s10 Chevy rear brakes which one goes in front the short one or long?
The short shoe (primary) faces the front. The long shoe (secondary) faces the rear.
What is the difference between 12 x 3 brakes and 12 x 2.5 brakes?
ONE HALF INCH/ THE WIDTH OF THE SHOE. HOPE THAT HELPED,BEN
Whatcircuit supplies air to the trailer service brakes in FMVSS121?
When using the foot/treadle valve, it'll be the primary air system. When using the Johnson bar, it'll be the secondary air system.
What is primary and secondry air?
If you're referring to air brake systems, primary air supplies service air pressure to the brakes on the drive axles and the trailer axles when the foot valve is used to brake. The secondary air system supplies service pressure to the brake system on the steer axle, as well as the trailer when the hand valve is used to apply the trailer brakes.
What is Primary and secondry?
If you're referring to air brake systems, primary air supplies service air pressure to the brakes on the drive axles and the trailer axles when the foot valve is used to brake. The secondary air system supplies service pressure to the brake system on the steer axle, as well as the trailer when the hand valve is used to apply the trailer brakes.
What is the difference between a brake booster and power brakes?
The brake booster is part of the power brake system.
