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Old 04-12-2010, 01:12 AM   #1
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brakes pulling left - caliper question

2004 TJ.

When I brake, it pulls left pretty bad. I took my wheels off this weekend and noticed that the left side had a ton of mud. so I cleaned it up well. Both tires would stop when rotating by hand and having someone step on the brake.

I searched the forum and it seems that everyone agrees that it is a caliper sticking that is causing the issue.

So which caliper do I need to replace? the left or the right? Would just cleaing the caliper work? (think I have a page saved on cleaning it. just have to locate it)

if I replace the caliper, I suppose I will need to bleed the brakes, correct?


Thanks for the help.

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Old 04-12-2010, 01:13 AM   #2
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If it's pulling to one direction, the opposite side isn't working properly. The left one is the only one working in this case, I'd inspect the right side more.

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Old 04-12-2010, 08:32 AM   #3
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Take the caliper off (while leaving it attached to the brake line) and clean (I use a grinder with a wire wheel attached) and polish the bolts that attach it as well as the sleeves that the bolts go through. Then use some special lithium grease on the sleeves(small packs of the grease can be bought at autozone for about $1 and 1 pack will do at least 2 wheels if not all 4)
If you have a special tool that pushes the piston back into the caliper, push it back in some, then re-assemble everything. The caliper should now freely move side to side on those cleaned and greased sleeves(at least the amount you compressed the caliper)
Repeat for both sides. Total time 30 min

I have a yj, not tj....not sure if your set up is the same.....but this applies for most vehicles with disk brakes
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Old 04-12-2010, 03:01 PM   #4
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seems simple enough to check and clean it.

I did not remove the caliper on the passenger side since it was not muddy or overly dirty looking. I will make a point to do that this weekend coming up.
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Old 04-12-2010, 03:16 PM   #5
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Quote:
Originally Posted by GRYDE001 View Post
Take the caliper off (while leaving it attached to the brake line) and clean (I use a grinder with a wire wheel attached) and polish the bolts that attach it as well as the sleeves that the bolts go through. Then use some special lithium grease on the sleeves(small packs of the grease can be bought at autozone for about $1 and 1 pack will do at least 2 wheels if not all 4)
If you have a special tool that pushes the piston back into the caliper, push it back in some, then re-assemble everything. The caliper should now freely move side to side on those cleaned and greased sleeves(at least the amount you compressed the caliper)
Repeat for both sides. Total time 30 min

I have a yj, not tj....not sure if your set up is the same.....but this applies for most vehicles with disk brakes
+1

while its off inspect the portion of the piston you can see. clean it as well.

Its "black lithium grease".

One thing you can try is:

1.check fluid level, it should be lowish.
2. push pistons back into calipers like you were going to change pads - watch the fluid in MC...don't let it overflow.
3. lube etc as directed above
4. put all back together
5. Pump up brakes

see what happens. I've seen it before where the piston gets in a bind of sorts and causes the pull problem, but simply pushing piston in, and then letting it come back out normally fixes issue. (like there's a small catch somewhere inside.). Never had it recur on same vehicle...odd I know.
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Old 04-12-2010, 04:41 PM   #6
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ok. I will definitely pick up some grease and brake cleaner this week sometime. I have it on my list to take it apart and clean it this weekend.

Thanks for the information guys. I was hoping that I wouldn't have to rebuild anything. It is still an option, but for now, this will be the easiest to accomplish and troubleshoot it from there.
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Old 04-12-2010, 07:31 PM   #7
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I had a very similiar problem several years back and after replacing everything I could think of someone told me to try the rubber hose that connects to the caliper. replaced it and fixed my problem. I guess the fuy was right and the hose had seperated on the inside restricting the flow of oil to that caliper.

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