Well here we go, been giving a mate a help with what was percieved to be a brake pull on his car.
I dont want to give any ideas of what I think it is away as I want to see if anyone else come up with a possible solution to a very annoying problem.
Vehicle : Ford Model A coupe
front brakes : Wilson welding back plates with Buick finned drums
Rear brakes, Stock chevy ( old 10 bolt rear end)
Master cylinder : 60s chevy truck ( the one with the tandem clutch master )
brake pipes are american standard steel 1/4 inch
OK when the car was brought in to the UK it was fitted with 40 Ford front brakes and had a pull to the left..
due to the brake pull and in search of much coolness, the front brakes were changed to the wilson welding set up. The idea here was to upgrade and solve the pulling issue in one hit...
All new brake components were used
guess what ,,,, the car still pulled left .. ?
much bleeding and adjusting made zero difference.
About this time I was drafted in, I just live around the corner, so its handy
Ive never been convinced it was a brake problem, especially since it had the same issue with the previous brake set up..
Any way, I stripped the entire brake system, cleaned out all of the cylinders checked the seals adjusted everything properly, checked wheel bearings cleaned and greased those beveled the front shoes and reasembled having adjusted everything.
Bled the system back to front, best pedal it ever had...
Took it for a drive and several applications of the brake later the car pulled to the left, exactly as it had been doing previously..
OK back to the drawing board, fronts are fine rears are fine fluids running freely, no brake binding while jacked up all wheels spinning freely and stop dead when brakes applied with no residual binding when the pedal is released..
I was never convinced the brakes were a problem but went back in there, made new metal brake pipes, eliminating any leaks or crushing damage ( of which there were none) swapped the master cylinder for a new one out the box, and fitted new flexis..
Guess what..... EXACTLY THE SAME PULL TO THE LEFT.
I must add that the owner was convinced it was possibly a line problem and for purposes of elimination that the master cylinder would be replaced .... there ony $35 so no real harm swapping it out anyway ..
So with still no progress but pretty much the entire brake system replaced in desperation I swapped the wheel cylinders side for side re bled the system for the umpteenth time, took it out and it STILLL FECKIN PULLED LEFT......
So far we have eliminated the actual brake set up, the wheel cylinders, the master cylinder, the brake flexis, metal brake pipes, air , and fluid ..
the wheel bearings are good, and I cleaned and repacked them for good measure..slight play in the kingpins but nothing excessive, tyre pressures are equal, tyres are nearly new
If you brake a few times and jump out to check the front drums the nearside drum is pretty hot while the right is still cool,
Brake as per an emergency stop viz hammer on the brake, it stops in a straight line, brake lightly and progressively it pulls hard to the left ..
Adusters are free and greased up and adjustment couldnt be more equal, its so basic you cant go wrong.... or can you !!!
The steering is the usual vega box which was brand new several months ago, ( remember can still pulled with all the old stuff on)
I get the impression that the car always wants to pull left, braking just magnifies the problem... and the reason why I think its more a steering/ suspension problem manifesting itself as a brake pull and somehow causing the left brake to do more work than it needs to
The car did break a perch pin and this was replaced but still never fixed the left pull problem..
Short or stripping the car and rebuilding it, checking and replacing as you go, im kinda stumped, Ive checked the wishbone, split ends are fine no excess wear in ball joints spring bushes are good, shox are old but look OK no leaks..
Im buggered if I know and I dont own the car to have time to check it completely other than what Ive already done..
Just wondered if anyone has had a similar problem and got to the bottom of it ?
Hope you can help