Binding Brakes
- erikofnorway
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Binding Brakes
I have brakes binding on front left wheel. It turns when free, but I have to use excessive force. Also the rim is much hotter than the other wheels after a drive. What would typically cause this and what will I be looking for when I take this apart?
Erik
Erik
1943 Ford GPW #97472 "Hootin Annie"
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- Chuck Lutz
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Re: Binding Brakes
Maybe the wheel cylinder is not releasing all the way when you let up off the brake pedal.
What is the history of the following:
1) Have the wheel cylinders ever been replaced?
2) When was the last time the brakes were overhauled and new shoes put on?
3) Have you bled that wheel cylinder since this has started happening?
What is the history of the following:
1) Have the wheel cylinders ever been replaced?
2) When was the last time the brakes were overhauled and new shoes put on?
3) Have you bled that wheel cylinder since this has started happening?
Chuck Lutz
GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947
GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947
- erikofnorway
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Re: Binding Brakes
Hi Chuck. Answers as follows:
I did a complete brake job, including replacement of brake cylinders about 6-7 years ago.
At that time I also replaced the brake shoes.
No I have not bled the wheel cylinders since this started happening.
Erik
I did a complete brake job, including replacement of brake cylinders about 6-7 years ago.
At that time I also replaced the brake shoes.
No I have not bled the wheel cylinders since this started happening.
Erik
1943 Ford GPW #97472 "Hootin Annie"
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- tamnalan
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Re: Binding Brakes
First check that the pedal travel is correct. There should be some free play before the brakes engage - about an inch? I forget.
Too little free play will prevent the pressure in the master cylinder from fully releasing after you let off the brake.
If that's good then there might be a blockage in the LF brake line. The flexible hoses go bad, or perhaps there's some crud in the wheel cylinder. Try flushing and bleeding the brakes before taking things apart.
Too little free play will prevent the pressure in the master cylinder from fully releasing after you let off the brake.
If that's good then there might be a blockage in the LF brake line. The flexible hoses go bad, or perhaps there's some crud in the wheel cylinder. Try flushing and bleeding the brakes before taking things apart.
Alan W. Johnson
_______________
MB, 201453, "Lt Bob"
MB, 1942, not stock
M-100, Sep 1951
MB-TD, Mar 2012
Ford 91C, 1939
_______________
MB, 201453, "Lt Bob"
MB, 1942, not stock
M-100, Sep 1951
MB-TD, Mar 2012
Ford 91C, 1939
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Re: Binding Brakes
Time to inspect the Wheel Cylinders, a kit may be all that is necessary. 6-7 years is not an unusually short time for occasionally driven Jeeps. Brake fluid quality may be a factor also.
2011 MVPA PIONEER AWARD - MVPA #1064
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Re: Binding Brakes
All good suggestions here. If it was me, I would pull the wheel & drum off and inspect the wheel cylinder.
Dino Falabrino
On the "G" since 1998.
1943 GPW 102310 DOD 3-3-43
1928 Model A Roadster Pickup
1930 Model A Tudor
1968 Taco Minibike
On the "G" since 1998.
1943 GPW 102310 DOD 3-3-43
1928 Model A Roadster Pickup
1930 Model A Tudor
1968 Taco Minibike
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Re: Binding Brakes
Was advised by brake expert Cyril Morrison back in the 50's to disassemble new Jeep wheel cylinders and give the bore and pistons a liberal coating of caster oil to help prevent wheel cylinders on seldom driven Jeeps from sticking. Cyril got his start at Bendix in 1933 and was assigned to Hydrovac and Aircraft Brake development projects. He put his background to good use during WWII.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
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- erikofnorway
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Re: Binding Brakes
I think I will order a wheel cylinder for that wheel from Ron, and swap it out. With the binding brakes, will I have a problem getting the drum off? Any other parts I should order at the same time?
Erik
Erik
1943 Ford GPW #97472 "Hootin Annie"
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- tamnalan
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Re: Binding Brakes
I would replace the rubber brake line too.
There's an old adage that anything done to the brakes on one wheel, should be repeated on both wheels (on the same axle).
There's an old adage that anything done to the brakes on one wheel, should be repeated on both wheels (on the same axle).
Alan W. Johnson
_______________
MB, 201453, "Lt Bob"
MB, 1942, not stock
M-100, Sep 1951
MB-TD, Mar 2012
Ford 91C, 1939
_______________
MB, 201453, "Lt Bob"
MB, 1942, not stock
M-100, Sep 1951
MB-TD, Mar 2012
Ford 91C, 1939
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Re: Binding Brakes
And you may discover that the cylinder bore and pistons have a shellac like deposit that will clean up with alcohol and that a kit will suffice. Caution, do not use gasoline to clean the wheel and master cylinders.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
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Re: Binding Brakes
Raise the tire off the ground.
Pump the brakes so the brake is dragging.
Now, release the brake bleeder to relieve any pressure that might be on the cylinder.
If the you get brake fluid and the wheel frees up, the flex hose has collapsed and needs replaced.
If opening the bleeder makes no difference, the cylinder is sticking.
A frame to axle hose collapse would effect both brakes on the axle.
A master cylinder problem would lock up all four brakes.
Pump the brakes so the brake is dragging.
Now, release the brake bleeder to relieve any pressure that might be on the cylinder.
If the you get brake fluid and the wheel frees up, the flex hose has collapsed and needs replaced.
If opening the bleeder makes no difference, the cylinder is sticking.
A frame to axle hose collapse would effect both brakes on the axle.
A master cylinder problem would lock up all four brakes.
Mike Wolford
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VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
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CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
EAA ( 49 yrs)
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Re: Binding Brakes
Mentioned free travel which is very important affects all wheels not just one.
2 possible causes but checked in order so as not to waste time/money::
1. Flex hose....there are 3 on the front axle....the one from the frame will cause the same issue on both front wheels, so that is out.
When the problem occurs release the bleeder on that particular wheel.
If the drag is gone the short hose over the knuckle is the problem.
For safety reasons automatic replacement of all hoses should be done @ 15 to 20 years on ALL vehicles.
2. Binding wheel cylinder piston/s on that side. If one side needs refurbishment or replacement so does the other.
When using brake fluid DOT's other than 5 [silicone] it is essential to flush the brake system every couple of years.
Not doing so is a primary cause of sticking wheel cylinder/s.
2 possible causes but checked in order so as not to waste time/money::
1. Flex hose....there are 3 on the front axle....the one from the frame will cause the same issue on both front wheels, so that is out.
When the problem occurs release the bleeder on that particular wheel.
If the drag is gone the short hose over the knuckle is the problem.
For safety reasons automatic replacement of all hoses should be done @ 15 to 20 years on ALL vehicles.
2. Binding wheel cylinder piston/s on that side. If one side needs refurbishment or replacement so does the other.
When using brake fluid DOT's other than 5 [silicone] it is essential to flush the brake system every couple of years.
Not doing so is a primary cause of sticking wheel cylinder/s.
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.
- erikofnorway
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Re: Binding Brakes
I need to get the jeep ready for the week end. So I started the work. I have pulled off the flange and the nuts and washers inside the hub, plus the outer bearing. Not sure if I need to pull off more to get the drum off? And I could not find a brake-line clamp, so I plan to use a wise-grip.
To get the drum off, I understand I turn the adjusters on the back to "relax" the shoes, then pull the drum off? The hub comes off with the drum, correct?
Erik
To get the drum off, I understand I turn the adjusters on the back to "relax" the shoes, then pull the drum off? The hub comes off with the drum, correct?
Erik
1943 Ford GPW #97472 "Hootin Annie"
1963 Volvo L3314N Feltvogn #2020 "UNIFIL-954"
1963 Volvo L3314N Feltvogn #2020 "UNIFIL-954"
- erikofnorway
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Re: Binding Brakes
Got the drum off but had to use the larger hammer to get it off the shoes. So tomorrow's project is to get the cylinder off and possibly bleed it. The adjusting screw on front pad is rusted to the locking nut. Trying to get them separated. Do I need to remove the spring to separate the shoes from the cylinder?
Erik
Erik
1943 Ford GPW #97472 "Hootin Annie"
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Re: Binding Brakes
Yes remove the spring, both shoes will fall away from the wheel cylinder & allow for EZ removal of the cylinder.
I don't recommend using vice grips on these flex hoses but if no alternative use split plastic tube between the steel jaws & rubber hose.
I don't recommend using vice grips on these flex hoses but if no alternative use split plastic tube between the steel jaws & rubber hose.
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.
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