brake issues
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Cargo Master
Joined: Feb 2008
Posts: 3,409
Likes: 1
From: back in SE Iowa
brake issues
hey guys on my 72 f100 work truck i have to pump the brakes about 4 or 5 times to get pressure up to stop.i drove it today and it scared the crap out of me.i was wondering what this may be.the master cylinder looks kinda wet along with the fittings on the side everything else is dry and it is loosing brake fluid but never drips that ive noticed all the calipers ary dry as well could the master cylinder be letting air in the lines?before i started working for this company the truck was neglected.im thinking the master cylinder what do you guys think?
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
If you are replacing fluid it is leaking somewhere, or it got low and you got air in the line.
Did you check the inside of your tires to see if there was any wet looking places on them?
Reman master cylinders aren't very expensive neither are wheel cylinders. Have you upgraded to power discs? Might be a good time to put that in the hopper.
Keep check on the fluid level and don't be afraid to do a check pump until you get the issue resolved.
John
Did you check the inside of your tires to see if there was any wet looking places on them?
Reman master cylinders aren't very expensive neither are wheel cylinders. Have you upgraded to power discs? Might be a good time to put that in the hopper.
Keep check on the fluid level and don't be afraid to do a check pump until you get the issue resolved.
John
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Check the inside of firewall and see if it's damp. Alot of times it will seep inside the truck(where rod comes thru). Sounds like it's got alot of air in the lines, plus the fact the master cylinder may be bad.
I would definitely start looking hard for the problem, as driving around like that is NOT safe.
I would definitely start looking hard for the problem, as driving around like that is NOT safe.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
John
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
If this 1972 F100 has calipers, then disc brakes have been swapped in.
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Senior User
Joined: Jun 2004
Posts: 249
Likes: 1
From: Sacramento, CA.
If you are loosing fluid with no apparent leak, it is probably leaking out the back of the master into the booster. Remove the master and see if there is fluid in the booster. If not, some times it takes a while for a wheel cylinder leak to show itself on the outside of the drum. Take off the drums and inspect the cylinders. Have fun,
Mike
Mike
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