Brakes have no power and will not hold on inclines - JeepForum.com
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Unread 04-29-2013, 12:14 PM   #1
Topgun514
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1988 XJ Cherokee 
 
Join Date: Jul 2006
Location: Salt Lake City, UT
Posts: 1,798
Brakes have no power and will not hold on inclines

I have been having an issue for a bit now but last time the mechanics had the jeep for a U joint replacement (I was lazy), they drove it around and said brakes felt ok. When I got my inspections this past september, I was told they were close to not stopping quickly enough but passed inspection still.

The issues have made me drive even safer, but I figure brakes and steering are the 2 most important safety features. So I was wondering if you guys could help diagnose possible issues. My brake experience is extremely limited.

Brakes will not lock up unless it is snowy and icy. The back lock up very easily when wet, winter was tricky to say the least when the brakes were even slightly wet. Stomping on the pedal will not lock them up on dry pavement.

POSSIBLE ISSUE: I am wondering if I have a vacuum or some leak. When I am on an incline, I have to keep my pedal pushing in, it will slowly lose power (over 30 seconds) and I step harder. When the pedal hits the floor I have to repump the brakes or hold onto the e-brake so I don't go into traffic.

1988 Renix all. Base model, no ABS.

Thanks in advance

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87 XJ pioneer-Totalled
96 XJ Sport- Sold
Now: 88 RENIX 4.0 XJ, Project Overlander
3.5" Lift, RE SF LCA's with skids, 31x10.50R15 Duratracs, ARB Roofrack, Custom Bumper, Glasspack, Bored TB, Custom seats
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Unread 04-29-2013, 12:50 PM   #2
00XJMikey
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2000 XJ Cherokee 
 
Join Date: Jul 2012
Location: Rhinebeck, NY
Posts: 473
A worn out brake booster and bad fluid is what's causing me to have the same problems (not as bad brake fading).

IIRC, summitracing.com sells reman units for around $40 - $50.
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Unread 04-29-2013, 12:51 PM   #3
Elias4WDCenter
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Join Date: Jul 2012
Location: Townsend, MA
Posts: 102
Leaky line, brake cylinder or master cylinder.
Worn brakes.

You need to pull your wheels off and inspect your brakes. Also, follow the lines from the master cylinder to each wheel and look for wet spots.

If you cannot determine the condition of your brakes on your own yet, you need some friends that have done it before to help out, or get a professional brake job. Hopefully you can round up some buddies to help out and show you how to do it.

Be safe.
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Unread 05-01-2013, 04:18 PM   #4
Topgun514
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1988 XJ Cherokee 
 
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I looked at my brake fluid, its dark alright but haven't lost a single drop. Looked around and didn't see any leaks.

Could this narrow down the results?
__________________
87 XJ pioneer-Totalled
96 XJ Sport- Sold
Now: 88 RENIX 4.0 XJ, Project Overlander
3.5" Lift, RE SF LCA's with skids, 31x10.50R15 Duratracs, ARB Roofrack, Custom Bumper, Glasspack, Bored TB, Custom seats
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Unread 05-01-2013, 07:09 PM   #5
Nick05
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1987 MJ Comanche 
 
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can you bleed them or have you done that?
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Unread 05-01-2013, 07:36 PM   #6
XJaySC
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1997 XJ Cherokee 
 
Join Date: Feb 2009
Location: Charleston
Posts: 248
Take it to a trusted shop and have the brakes inspected.

Several things could cause the problem you have but with out putting my hands on it its all just guessing.

If you don't have any experience with brake work I wouldn't suggest bleeding the system.
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Unread 05-02-2013, 08:59 AM   #7
Topgun514
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1988 XJ Cherokee 
 
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Ok thanks guys. I appreciate the responses. I think shop time is where it's, dreadfully, heading.
__________________
87 XJ pioneer-Totalled
96 XJ Sport- Sold
Now: 88 RENIX 4.0 XJ, Project Overlander
3.5" Lift, RE SF LCA's with skids, 31x10.50R15 Duratracs, ARB Roofrack, Custom Bumper, Glasspack, Bored TB, Custom seats
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Unread 05-02-2013, 09:09 AM   #8
jeepster383
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Posts: 629
If you're pedal is dropping and there's no visible leaks on the outside I would suspect the master cylinder
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