pulls left when i brake.....

[JAMMER]

Just been driving my 69 around first time. (around town). I have the Cheby disk conv. Power MC. When I am going about 50 mph and apply the brakes the truck pulls left. All the brakes are new. Any help?
TIA

 

[70_Steve]

Still have drums in the rear??? Then check the adjustment of the shoes.

 

[bigpappa]

The first two things that come to my mind is make sure the tire pressure in both tires are close to the same. Second make sure there are no kinks in your brake lines causing one side to not get as much pressure as the other. I am sure you will get other things to look for those ar just what leapt into my mind.

 

[dpmerrill]

Did this just start happening after the disk conversion?

Worn out radius arm end bushings can point you different directions when you brake. Have you checked those?

 

[JAMMER]

I have checked all of the above. hmmmmm. Any other thoghts? Everything on this truck is new. Frame up.

 

[spatacuulous]

Pulls to the left

I would bleed the brake lines first, starting with the wheel cylinder farthest from the drivers side ( Rear Passenger Tire). What Calipers did you use on the conversion? Are they new as well? Assuming that they are, I would dissasemble the drivers side front setup. Check the pads for unusual wear, hints of too much heat or friction would be "mother of pearl" colored or oil on a puddle colored. Sometimes even the new calipers can be beat from the factory. This goes for master cylinders as well. Your problem lies within the calipers. For a quick fix, encourage passengers to lean hard to the right while you brake.

 

[Broncobowsher]

Pulling to the left usually means that the right brake isn’t working up to what it should be.
Air in the system affects both left and right sides the same.
Rear brakes usually don’t cause much pull.

So look for some reason why the right side isn’t working right.
A very big reason with the Chevy conversion is lack of adequate clearance between the caliper and the knuckle.
Another reason is bad pads, swap the pads between the 2 calipers and see if the pull changes sides. That can be corrected with new pads.
Last is what I think I have, mismatched calipers. If one caliper has a larger bore then the other, it will produce more clamping force for the same line pressure and will pull that way. Not sure of a good way to check this, since it only takes a few thousandths of an inch to make a difference. Do a few aggressive honing jobs on a cheap rebuilt caliper and who knows what the bore size really is?
While in there, be sure to also look at the wheel bearings and ball joints to make sure that they are in good shape

Last option is that you may have bump steer. If you have to turn the wheel to the right when you accelerate hard to go in a straight line, then your steering/track bar geometry is all screwed up. This is extremely common in lifted vehicles.

 

[saryan]

I have heard that it does that if you have lockers in the front. I dont know this for sure but I heard it once. Dont know if that helps you or not.

 

[RT]

Steer right when you brake...

Heh , Heh ,,











Found the Tequila... ;D ;D

 

[asabadin]

had the same problem. ended up bieng hung up calipers. Make sure they are not hitting the knuckle without the brake pads. after i ground some more of the knuckle off, problem solved. for me it only happened at high speeds.

 

[ehumaui]

I had the same problem. You need to grind the knuckle.


ehumaui

 

[hackyrat]

While your checking above items, make sure you do not have any oils on the rotor. If you have no miles on them they may need a little wear on the pads to seat equally. Is one rotor slightly rougher or have a bit of rust on it? Are both rotors straight and not warped?