Question about 1991 Jeep Cherokee Limited

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1991 4.0 Jeep Cherokee brake booster, can an o-ring be replaced if the booster leaks, and how?

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If the brake booster has failed then the only real fix is replacement.

Posted on Oct 04, 2011


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Hi i just replaced a brake booster in 1999 jeep grand cherokee because of vacuum leak .but now i ll have to push down to brake .how to make it little hard ?

Sounds like air in the brake system. Will need to bleed the brakes to remove the air. May possibly have to bleed the master cylinder as well.

Dec 12, 2012 | 2001 Jeep Grand Cherokee

1 Answer

Jeep cherokee limited 1991 (with abs) brakes wont work

I don't see why not.
Technically, the hydraulic brake system works independently from the ABS. The ABS system uses the regular hydraulic system to function.
So your regular hydraulic system should work even with the ABS system in place.

Sep 01, 2012 | 1991 Jeep Cherokee Limited

1 Answer

1998 Jeep Cherokee Sport. There is no visible leak in the braking system, but fluid level goes down rapidly and there is visible exhaust smoke.

Very likely the master cylinder is leaking and filling the power booster with brake fluid. to check, remove the master from the booster and look for signs of seepage.
I can't remember seeing a booster full of fluid ...hopefully it will empty itself through the engine. You can't take the booster apart and fluid in there can't be good for it.

Dec 12, 2010 | Jeep Cherokee Cars & Trucks

1 Answer

Brake petal goes to floor

if you cant find any leaks in lines or cylinders or calipers u probaly have a bad booster
see lots come threw my shop like that but also their is a vacum line that runs to the booster and it hooks to a plastic valve that goes in to the booster those get gloged and you loose pedal as well try replacing that before you bye a new boooster

Mar 26, 2009 | 2000 Jeep Grand Cherokee

2 Answers

Soft brakes

then you will need a master cylinder or a brake booster

Jan 30, 2009 | 1988 Jeep Cherokee

1 Answer

Brake air leak noise

check under dash for a leaky vaccum switch. if booster was faulty brake pedal would be very hard to depress.

Jul 18, 2008 | 1991 Jeep Comanche

1 Answer

1991 jeep comanche brakes

check under dash for leaking vaccum switch. usually manufacturers use vac switches to release the e-brake automatically when applying the brake.

Jul 17, 2008 | 1991 Jeep Comanche

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