plugging master cylinder
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Elder User
Joined: May 2001
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From: East Norriton,PA
plugging master cylinder
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on my 79 f-250 plow truck, i blew out a steel brake line coming off the master cylinder down by the frame, for the back brakes, can i get away
with just plugging the master cylinder for the back brakes?
on my 79 f-250 plow truck, i blew out a steel brake line coming off the master cylinder down by the frame, for the back brakes, can i get away
with just plugging the master cylinder for the back brakes?
Lead Driver
Joined: Jun 2005
Posts: 8,458
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From: Calgary Canada
Having four wheel brakes is pretty important. I'd get this fixed ASAP. While it's true that your front brakes do most of the work, having all four is much better for stability. I've briven on two brakes, and it's scary as hell when you use them Now if you are talking about plugging it just to get it home, then, maybe.
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Elder User
Joined: May 2001
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From: East Norriton,PA
i know its nice to have the 4 wheels braking , but since its a plow truck for my driveway, i thought i could get away with a quick fix for the winter plowing. the truck wont see the road ever only the mile 1/2 mile long driveway
at my house... So is plugging the MC hurting anything is what i should ask?
I really only need the front calipers, and if i really get in a jam, i can drop the
blade and stop the truck
at my house... So is plugging the MC hurting anything is what i should ask?
I really only need the front calipers, and if i really get in a jam, i can drop the
blade and stop the truck
Cargo Master
Joined: Sep 2005
Posts: 2,954
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Originally Posted by 69crewcab
i know its nice to have the 4 wheels braking , but since its a plow truck for my driveway, i thought i could get away with a quick fix for the winter plowing. the truck wont see the road ever only the mile 1/2 mile long driveway
at my house... So is plugging the MC hurting anything is what i should ask?
I really only need the front calipers, and if i really get in a jam, i can drop the
blade and stop the truck
at my house... So is plugging the MC hurting anything is what i should ask?
I really only need the front calipers, and if i really get in a jam, i can drop the
blade and stop the truck
Cargo Master
Joined: Sep 2005
Posts: 2,954
Likes: 64
Originally Posted by Torque1st
DO NOT plug the MC!!! None of the brakes will work since the brake pedal will be as hard as a rock because there is no place for the fluid to go from that section of the MC. Replace the line.
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Originally Posted by EricJ
if you blow a line the checkvalve closes the bad system and the other still works.
Plugging or crimping the line to the back after the proportioning valve is different than plugging the MC. Unfortunately if you plug the line to the back the proportioning valve may "see" the front brakes as a blown line and shift to close the front brakes. Leaving you with no brakes at all... It is not worth taking a chance. Fix the system properly!
Last edited by Torque1st; Nov 28, 2005 at 03:29 PM.
Cargo Master
Joined: Sep 2005
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Originally Posted by Torque1st
That is correct.
Plugging or crimping the line to the back after the proportioning valve is different than plugging the MC. Unfortunately if you plug the line to the back the proportioning valve may "see" the front brakes as a blown line and shift to close the front brakes. Leaving you with no brakes at all... It is not worth taking a chance. Fix the system properly!
Plugging or crimping the line to the back after the proportioning valve is different than plugging the MC. Unfortunately if you plug the line to the back the proportioning valve may "see" the front brakes as a blown line and shift to close the front brakes. Leaving you with no brakes at all... It is not worth taking a chance. Fix the system properly!
Senior User
Joined: May 2004
Posts: 185
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From: Bedford Hts, Oh
I clamped down on our steel brake line, in our HMMWV, during a convoy. The line sprung a leak. So, we had no front brakes. The pressure equalizes, remember hydraulics class? There was no change to the brake operation, at the rear. Our HMMWV's are power assisted brakes, locking all four if you laydown on them. You will only need to step on the pedal sooner to brake at a longer distance, since the front brakes do more tha 60% of the stopping. We convoyed like that for 300 miles, with no trouble. Do not plug past the pro-valve, then you will have pressure going where you do not want it. We crimped between the pro-valve and the MC.
Last edited by robtinalimon; Nov 28, 2005 at 09:27 PM.