brake problem
Thread Starter
|
New User
Joined: Apr 2007
Posts: 3
Likes: 0
brake problem
Recently had a brake job done on my 66f250 (previous Ride Of the Week), The truck is pulling hard to the right, I've had it back in the shop for the 3rd time, and now they are telling me they don't know what's causing it.. (a good shop)..
here is a list of what was done..
All drums resurfaced, and shoes replaced
replaced flexible hoses, and cylinders
bled the lines..
worked ok for awhile (about a month), and then started pulling right.. the shop has adjusted and adjusted, it just keeps coming back.. My thought is that one of the slave cylinders is not working properly,, but no leaking present...
appreciate any ideas and or thoughts about what might be causing this.. Thanks in advance
here is a list of what was done..
All drums resurfaced, and shoes replaced
replaced flexible hoses, and cylinders
bled the lines..
worked ok for awhile (about a month), and then started pulling right.. the shop has adjusted and adjusted, it just keeps coming back.. My thought is that one of the slave cylinders is not working properly,, but no leaking present...
appreciate any ideas and or thoughts about what might be causing this.. Thanks in advance
Cargo Master
Joined: Oct 2005
Posts: 2,084
Likes: 94
From: Stanton, Michigan, USA
Is the right front brake getting hot when it starts pulling?
When it binds down, does it "release itself" after sitting over night?
If it was mine, I'd suspect that the right front flex line (although new) is failing anyway. I would replace that flex line and then re-bleed the system.
BarnieTrk
When it binds down, does it "release itself" after sitting over night?
If it was mine, I'd suspect that the right front flex line (although new) is failing anyway. I would replace that flex line and then re-bleed the system.
BarnieTrk
Thread Starter
|
New User
Joined: Apr 2007
Posts: 3
Likes: 0
thank you for the reply, It does not lock up, it just feels as if the adjustment is wrong, and when stepping on the brake it pulls to the right, then when released it returns to normal..
I thought the same thing about the wheel cylinder that even though it's new , it could be defective.. but did not consider the flex line..
It was not acting like this prior to the break job,, I actually took it in to to have the wheel bearing replaced, and the shop spotted the leaking cylinders.. at that time it was not pulling..
I will pass on your reply to the shop,, you feel that the flex line should be replaced, and possibly the cylinder also..
thank you
I thought the same thing about the wheel cylinder that even though it's new , it could be defective.. but did not consider the flex line..
It was not acting like this prior to the break job,, I actually took it in to to have the wheel bearing replaced, and the shop spotted the leaking cylinders.. at that time it was not pulling..
I will pass on your reply to the shop,, you feel that the flex line should be replaced, and possibly the cylinder also..
thank you
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
So long as we're WAG, considering the hoses have been replaced it seems to me the more likely culprit at this point would be a partial obstruction in the hard line? Also consider if it's pulling to the right, the problem may be in the left side of the brake system. Can also be a M/C problem.
Tuned
Joined: Jun 2015
Posts: 298
Likes: 3
Get a helper, put the truck on jack stands, spin the wheels one at a time, and have your helper step on the brakes. Do all the wheels stop when the pedal is depressed? Does any wheel have less resistance while the pedal is depressed? Do they all spin freely again when the pedal is let go? This could help you locate the problem.
An obstruction in the line usually causes brakes to lock up. The pressure flowing toward the wheels when you apply the brakes is higher than the pressure flowing back when you let go. So, fluid gets in but can't get back out. Air in the line usually causes one or more wheels not to brake as hard or not at all. Instead of the fluid flowing to the wheel cylinders, the air gets compressed.
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
I don't know if the MC is the stock single reservoir version or, if the truck has been converted to a tandem, dual reservoir MC (?).
In either case, if any of the brakes are working --especially to one of the front brakes, the problem would have to be after the MC. The fluid pressure being supplied by the MC to the front and rear brakes would be equal throughout the entire brake system (Pascal's Law).
A restriction in the lines or a sticky or malfunctioning wheel cylinder could cause the fluid pressure not to actuate the brakes as it should but, the pressure in the brake lines up to that trouble point would be the same as what's being applied to the rest of the brake system.
If the MC is actuating any of the brakes, the problem is down stream from there.
Pascal's Law states that the "Pressure applied to any part of a confined fluid transmits to every other part with no loss. The pressure acts with equal force on all equal areas of the confining walls and perpendicular to the walls. This is the basic principle for any hydraulic system."
In either case, if any of the brakes are working --especially to one of the front brakes, the problem would have to be after the MC. The fluid pressure being supplied by the MC to the front and rear brakes would be equal throughout the entire brake system (Pascal's Law).
A restriction in the lines or a sticky or malfunctioning wheel cylinder could cause the fluid pressure not to actuate the brakes as it should but, the pressure in the brake lines up to that trouble point would be the same as what's being applied to the rest of the brake system.
If the MC is actuating any of the brakes, the problem is down stream from there.
Pascal's Law states that the "Pressure applied to any part of a confined fluid transmits to every other part with no loss. The pressure acts with equal force on all equal areas of the confining walls and perpendicular to the walls. This is the basic principle for any hydraulic system."
Trending Topics
Senior User
Joined: Jul 2003
Posts: 218
Likes: 0
From: Spokane, WA
I had a similar problem - turned out the new brake shoes I installed on the front end would seep out whatever material they were made out of, or perhaps were just defective. It took the shop several tear downs and brake line replacements to figure that one out. I pulled my hair out by then.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Or wheel bearing. Doubtful this is the case here, but.
Thread Starter
|
New User
Joined: Apr 2007
Posts: 3
Likes: 0
Wow, thanks for all of the replies.. I will pass all of this on to the shop.. a couple notes.... The front end is tight, no problem there ,, and the MC is original, (i mean stock), no problem there either..
is there any way to check for a possible obstruction in a line??
will keep you informed as to the eventual fix.. (i hope)..
thanks again..
is there any way to check for a possible obstruction in a line??
will keep you informed as to the eventual fix.. (i hope)..
thanks again..
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
Wow, thanks for all of the replies.. I will pass all of this on to the shop.. a couple notes.... The front end is tight, no problem there ,, and the MC is original, (i mean stock), no problem there either..
is there any way to check for a possible obstruction in a line??
will keep you informed as to the eventual fix.. (i hope)..
thanks again..
is there any way to check for a possible obstruction in a line??
will keep you informed as to the eventual fix.. (i hope)..
thanks again..
5th Wheeling
Joined: Mar 2015
Posts: 34
Likes: 1
The P/O did a brake job on the rear of my F100. He got the adjusters installed on the opposite sides. The one on the left side was trying to tighten the shoes up but was actually making them loosed, reverse on the other side.
I adjusted the brakes when I got it and everything was good for a short time then they got out of adjustment. There was a slight pull, probably not as noticeable on the rear than it would be on the front.
I had to take the adjusters off and take the cap off and then saw the that the L was on the Rt. side and the R was on the Left.
I adjusted the brakes when I got it and everything was good for a short time then they got out of adjustment. There was a slight pull, probably not as noticeable on the rear than it would be on the front.
I had to take the adjusters off and take the cap off and then saw the that the L was on the Rt. side and the R was on the Left.
Thread
Thread Starter
Forum
Replies
Last Post
jakeharp
1973 - 1979 F-100 & Larger F-Series Trucks
13
Aug 4, 2017 06:49 AM
vfrf2
1987 - 1996 F150 & Larger F-Series Trucks
3
May 16, 2014 08:33 PM
cberry
1948 - 1956 F1, F100 & Larger F-Series Trucks
15
Mar 12, 2008 10:40 AM