1991 Ford F-150 Rebuilding the Master brake cylinder

Tiny
EDWJONES
  • MEMBER
  • 1991 FORD F-150
  • V8
  • 4WD
  • MANUAL
  • 180,000 MILES
I removed the master brake cylinder from the truck and proceeded to rebuild it. I removed the true arc or clip from the rear end of the unit expecting the insides would drop out. They didn't so I fooled around trying to get it to drop out without any success. I then notice a set screw on bottom of the brake cylinder and removed it with no success of the internal part dropping out. Next I tried to remove the plastic brake fluid resevor on top of the brake cylinder by pulling on it without success. It has two connections to the brake cylinder appears to be pressed into a rubber collar, and I don't know how much force it would take without damaging it. The purpose of removing it is to look for some kind of release device to free the internal parts.
Thursday, August 28th, 2008 AT 7:03 PM

3 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,386 POSTS
Hit the back of it with a rubber mallet. OR you can hit it on the table flat and that should jar it, if not rubber mallet it, you can hit it, it holds 400 odd psi! If that dont work the insides could be swolen up not coming loose.
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Thursday, August 28th, 2008 AT 9:30 PM
Tiny
EDWJONES
  • MEMBER
  • 1 POST
After reading your reply I went out to the garage and hit the back with a rubber mallet and the internal works came out like a shot. Some times I think I work to hard.
Thanks, Ed Jones.
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Friday, August 29th, 2008 AT 5:21 AM
Tiny
BLACKOP555
  • MECHANIC
  • 10,386 POSTS
Glad to hear it was that simple! Need any further assistance let me know.

Remember note the way they came out.
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Friday, August 29th, 2008 AT 8:45 AM

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