0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What should the vacuum be in lbs at the carburetor on a 350 using vacuum assist brakes and vacuum wiper?
18 to 21 inches at idle
2003 dodge neon brakes are hard when engine off but soft with engine on?
because the hydraulic system pumps are running when the engine is on (power brakes), assisting you in applying the brakes. if your car did not have a brake assist pump, the pedal would always be difficult to press. Actually, there is no "hydraulic system pump", but a vacuum assist device. It is that large, round, metal thing that the master brake cylinder is attached to. Obviously, it operates on the engine's vacuum while the engine is running. With the engine off, there is no vacuum, and therefore no assist. There is a big, rubber diaphragm inside it, which is operated on by the engine vacuum. Pushing down on the brake pedal opens up the vacuum. When you let up on the brake pedal, springs return it to the original position. Occasionally they develope small leaks in the diaphragm, and have to be replaced. I have done this once as a "shade-tree" mechanic, who was trained in the U.S. Air Force. It is not an easy job.
What is the diesel vehicle have a vacuum pump?
Because a diesel engine does not create vacuum and the vacuum pump is necessary to operate things like the vacuum assist brakes and cruise control.
Loss of power brakes on 1995 Saturn SC1 DOHC?
"Power Brakes" are actually "vacuum assisted brakes", meaning that a vacuum diaphragm is used to provide additional force against the brake pedal as you attempt to stop your vehicle. If the engine vacuum has decreased, through wear, timing issues or because of a vacuum leak, there will be considerably less of the vacuum assist available when you stop your vehicle. First, check for a vacuum leak, and make certain that you include the vacuum assist module. If there are no vacuum leaks, check the vacuum that the engine is creating; if that's not the problem then you may have a leaking or damaged master cylinder.
How do you bleed hydraulic anti lock brakes on a ford 350?
hand operated vacuum pump . hook up and and apply vacuum and open bleeder and keep applying vacuum then close bleeder. repeat x4
What is an engine activated booster unit that reduces the effort required to apply the hydraulic brakes?
That would be the power brake vacuum operated booster.
Why would a 94 blazer brakes hard as stone?
No power assist Severe vacuum leak Bad brake booster
Why would Brake pedal on ford zx2 stay up with car off but go to floor when car is turned on?
Vacuum booster is working--When vehicle off there is no vacuum assist (for power brakes) When vehicle is on vacuum is present Brake pedal going to floor is another problem--no fluid in master cylinder? Leak in system? Brakes not adjusted properly?
What kind of braking system uses a brake booster?
Brake boosters are found on car braking systems, to help the brakes to stop the car. They work on the disc brakes, using a vacuum supply to add to the hydraulic braking system. On petrol engines the engine may provide the vacuum, on diesel engines there needs to be a separate pump.
What is an integral braking system?
Older cars had integral brakes, meaning that a proportional valve, which is the redundant part of a brake system that prevents total failure of brakes, if a brake line broke you will still have brakes on two wheels, and a master cylinder were all combined in one unit. A nonintegral brake unit typically uses a vacuum booster for power assist. The booster, the master cylinder, hydraulic modulator, and proportional valve are all separate units
What is an F-250 turbo diesel vacuum pump?
vacuum pump in a diesel, is a pump installed to create vacuum to assist in opreation of brakes in pickups tha have diesel engines, the brakes are same as any other pickup and use vacuum created by the ngine to operate. a diesel engine does not create vacuum, as a gasoline engine does. that is why there is a vacuum pump added to a small diesel engine on f250 the pump is belt driven, is on the driver side of engine, under the a/c compressor.
What are the 2 types of brake systems?
Air and hydraulic brake systems.
