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Pulling to left while braking #6602306
08/24/19 08:22 PM
08/24/19 08:22 PM
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Indiana
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brianmall Offline OP
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New used truck I just purchased
Air brakes
Chevy T7500
Pulling to left every time I brake
Loud noise on left side when braking hard

Possible causes?

I've never messed with air brakes. Just looking for some good pointers before I dive in.

Grease seal? Out of adjustment? Crystalized pad? Etc...

Re: Pulling to left while braking [Re: brianmall] #6602308
08/24/19 08:23 PM
08/24/19 08:23 PM
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Indiana
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brianmall Offline OP
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Because this truck is essentially unknown to me. I'm thinking I'm just gonna do a full job? New everything?

Re: Pulling to left while braking [Re: brianmall] #6602310
08/24/19 08:24 PM
08/24/19 08:24 PM
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Indiana
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brianmall Offline OP
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No visible leakage from outside

Re: Pulling to left while braking [Re: brianmall] #6602317
08/24/19 08:29 PM
08/24/19 08:29 PM
Joined: Dec 2010
Posts: 34,758
Central, SD
Law Dog Offline
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Break shoes wore out the other side not doing it's part?


Was born in a Big City Will die in the Country OK with that!

Jerry Herbst
Re: Pulling to left while braking [Re: Law Dog] #6602335
08/24/19 08:46 PM
08/24/19 08:46 PM
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Indiana
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brianmall Offline OP
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Originally Posted by Law Dog
Break shoes wore out the other side not doing it's part?


Why the loud slapping noise on left when breaking hard then?

Also,

There is some squealing and slight pulsation of pedal. But I think those could be different issue all together?

Me lacking in expirence with air brakes wants to say left side needs adjusted? Because it pulls to left all the time and engages hard when breaking hard on the left side.

Dunno!

I think it's just all gonna get replaced!

Re: Pulling to left while braking [Re: brianmall] #6602338
08/24/19 08:47 PM
08/24/19 08:47 PM
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Indiana
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brianmall Offline OP
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Or maybe right is out of adjustment making left to compensate?

Re: Pulling to left while braking [Re: brianmall] #6602359
08/24/19 09:05 PM
08/24/19 09:05 PM
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williamsburg ks
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danny clifton Offline
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all I know about air brakes is semis.

if I adjust my brakes I adjust them all. on a big truck more brake on one side could be an equalizer valve needs replaced.

crawl under there and have a look. look for broke/cracked shoes or wore out shoes. listen for air leaks. look for a broken slack adjuster. have somebody step on the brake pedal and hold it. listen for air leaks and watch the pressure gauge. gauge should hold steady. look and make sure slack adjusters are moving when the pedal is depressed. last check the abs light and make sure the bulb wasn't removed to hide a problem


Those who would give up essential liberty, to purchase a little temporary safety, deserve neither liberty nor safety. Benjamin Franklin (1706-1790)
Re: Pulling to left while braking [Re: brianmall] #6602378
08/24/19 09:22 PM
08/24/19 09:22 PM
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Oakland, MS
Drifter Offline
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If adjusted wrong the shoes can glaze over. Can clean them sometimes with mineral spirits. Could have a cracked drum on the right making the left do all the braking. I am assuming this is on a big truck as never heard of air brakes on a private size vehicle.


Some individuals use statistics as a drunk man uses lamp-posts — for support rather than for illumination.

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Re: Pulling to left while braking [Re: Drifter] #6602407
08/24/19 09:55 PM
08/24/19 09:55 PM
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Indiana
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brianmall Offline OP
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Originally Posted by Drifter
If adjusted wrong the shoes can glaze over. Can clean them sometimes with mineral spirits. Could have a cracked drum on the right making the left do all the braking. I am assuming this is on a big truck as never heard of air brakes on a private size vehicle.



It's a T7500 with 13 yd packer body. Truck weight is 21000 empty

Re: Pulling to left while braking [Re: danny clifton] #6602408
08/24/19 09:57 PM
08/24/19 09:57 PM
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Indiana
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brianmall Offline OP
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Originally Posted by danny clifton
all I know about air brakes is semis.

if I adjust my brakes I adjust them all. on a big truck more brake on one side could be an equalizer valve needs replaced.

crawl under there and have a look. look for broke/cracked shoes or wore out shoes. listen for air leaks. look for a broken slack adjuster. have somebody step on the brake pedal and hold it. listen for air leaks and watch the pressure gauge. gauge should hold steady. look and make sure slack adjusters are moving when the pedal is depressed. last check the abs light and make sure the bulb wasn't removed to hide a problem


Will do

Brother in law is a truck driver/tech. Says it sounds like a slack adjuster?

I still think I'm gonna replace everything in the front just so I know what I have?

Re: Pulling to left while braking [Re: brianmall] #6602409
08/24/19 09:58 PM
08/24/19 09:58 PM
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Indiana
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brianmall Offline OP
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He will come out tmrw afternoon after church and take a look.

Re: Pulling to left while braking [Re: brianmall] #6602418
08/24/19 10:12 PM
08/24/19 10:12 PM
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Frazee, MN
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backroadsarcher Offline
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left side being adjusted and the right side needing adjustment. Or like said previously brake valve might need to be replaced. Could even be the brake cam bushing have excessive wear causing them to stick a little when applied. (did brake work on semi's years ago.)

Re: Pulling to left while braking [Re: brianmall] #6602479
08/24/19 11:07 PM
08/24/19 11:07 PM
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Central, SD
Law Dog Offline
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If it's got play and slap it's a wore out or loose issue.


Was born in a Big City Will die in the Country OK with that!

Jerry Herbst
Re: Pulling to left while braking [Re: brianmall] #6602485
08/24/19 11:10 PM
08/24/19 11:10 PM
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northern indiana
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kenny k Online content
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Sound like a strip out slack adjuster, What year is the truck? old slack adjuster can do that.. Adjust the brakes then have someone hit the brakes if the slack adjuster makes a clattering sound then it's bad and won't stay adjusted.

Re: Pulling to left while braking [Re: kenny k] #6602621
08/25/19 08:07 AM
08/25/19 08:07 AM
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Indiana
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Originally Posted by kenny k
Sound like a strip out slack adjuster, What year is the truck? old slack adjuster can do that.. Adjust the brakes then have someone hit the brakes if the slack adjuster makes a clattering sound then it's bad and won't stay adjusted.



2007

Re: Pulling to left while braking [Re: brianmall] #6602628
08/25/19 08:26 AM
08/25/19 08:26 AM
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kentucky
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logger coffey Offline
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Like you say, check everything out in front ,big trucks its just the smart thing to do.

Re: Pulling to left while braking [Re: brianmall] #6602629
08/25/19 08:28 AM
08/25/19 08:28 AM
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potter co. p.a.
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pcr2 Offline
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pulling left while braking--sounds like a demoncrat. grin









Re: Pulling to left while braking [Re: brianmall] #6602662
08/25/19 09:20 AM
08/25/19 09:20 AM
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whitehorse,yukon,canada
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trapperbruce Offline
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it could be a leaking wheel seal and oil on the brake pad

Re: Pulling to left while braking [Re: brianmall] #6602902
08/25/19 04:01 PM
08/25/19 04:01 PM
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Indiana
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brianmall Offline OP
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Went through and adjusted/greased everything

Now all pulling to left is fixed. But it will pull right now when I brake hard.

?

Re: Pulling to left while braking [Re: brianmall] #6602936
08/25/19 04:54 PM
08/25/19 04:54 PM
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williamsburg ks
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danny clifton Offline
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did you check that abs light?


Those who would give up essential liberty, to purchase a little temporary safety, deserve neither liberty nor safety. Benjamin Franklin (1706-1790)
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