Hummer Forums by Elcova  
Forums - Home
Source Decals

Source Motors
Custom. Accessories.

H2 Accessories
H3 Accessories
Other Vehicles

H2 Source

H2 Member Photos
H2 Owners Map
H2 Classifieds
H2 Photo Gallery
SUT Photo Gallery
H2 Details

H2 Club


H3 Source

H3 Member Photos
H3 Classifieds
H3 Photo Gallery
H3 Owners Map
H3 Details
H3T Concept

H1 Source

H1 Member Photos
H1 Classifieds
H1 Photo Gallery
H1 Details

General Info

Hummer Dealers

Sponsored Ads


Source Motors - custom. accessories.

Go Back   Hummer Forums by Elcova > Hummer H1 Discussion Forums > Technical Discussion and Customizing your H1

Thread Tools Search this Thread Display Modes
Old 05-10-2009, 10:32 PM
Elcova Newbie
Join Date: May 2009
Posts: 1
XXXLOAN is on a distinguished road
Default H1 brake question?

2002 HUMMER H1
I replaced the rear brake pads and had the calipers rebuilt after my brakes would lock up when I drove the H1 for about 10-15 minutes.If let the truck sit for 30-60 minutes the breaks would work (not locked up). Any suggestions on how I can figure out the problem causing the rear brakes too lock up? You can feel the brakes getting tighter the longer I drive it.Any suggestion's?
Reply With Quote
Old 05-11-2009, 05:56 PM
familyguy familyguy is offline
Elcova Newbie
Join Date: Aug 2008
Posts: 4
familyguy is on a distinguished road
Default Re: H1 brake question?

I have never had any personal experience with a problem like this, but I'm copying and pasting the following from my service manual for you (if you don't have a manual). There's also a section on diagnosis of the hydroboost if you suspect that:

Brake Drag
Brake drag occurs when the lining is in constant contact with
the rotor. Drag can occur at one wheel, all wheels, fronts only,
or rears only. It is a product of incomplete brakeshoe release.
Drag can be minor or severe enough to overheat the linings,
and rotors.
Brake drag also has a direct effect on fuel economy. If undetected,
minor brake drag can be misdiagnosed as an engine or
transmission/torque converter problem.
Minor drag will usually cause slight surface glazing of the lining.
It can also generate hard spots in rotors from the overheatcool
down process. In most cases, the rotors, wheels and tires
are quite warm to the touch after the vehicle is stopped.
Severe drag can char the brake lining all the way through. It
can also distort and score rotors to the point of needing replacement.
The wheels, tires and brake components will be extremely
hot. In severe cases, the lining may generate smoke as
it chars from overheating.
Some common causes of brake drag are:
? seized or sticking caliper piston
? caliper binding on bushings or pin slides
? incorrect length caliper mounting bolts (too long)
? loose caliper mounting bracket
? misassembled components
? misadjusted brakelight switch
? binding brake pedal
? master cylinder/hydroboost internal fault
? improperly adjusted parking brake
If brake drag occurs at all wheels, the problem may be related
to a blocked master cylinder compensator port or faulty hydroboost.
An improperly mounted or adjusted brakelight switch can prevent
full brake pedal return. The result will be the same as if
the cylinder compensator ports are blocked. In this case, the
brakes would be partially applied all the time causing drag.
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT +1. The time now is 11:29 PM.

Powered by vBulletin Version 3.0.7
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.