Master Cylinder issues?
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Postmaster
Joined: Jan 2004
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From: Kearney, Nebr
Master Cylinder issues?
It's been a while since I've been on here... lots of stuff going on!
Anyways, I was traveling down the interstate a few days ago and I noticed the my cruise kicked off and my parking brake light turned on. I thought that was a little weird as I haven't touched the brakes in the last 100 miles or so. I pulled off the interstate and it appears that I lost any assist to the brakes. The pedal depresses an inch of two and then it's solid.
So I'm guessing the master cylinder went out? What is the process for replacing it? I know they can be somewhat a pain as you have to bleed the cylinder and the brakes.
Any pointers are tips? Thanks in advance.
Brandon
Anyways, I was traveling down the interstate a few days ago and I noticed the my cruise kicked off and my parking brake light turned on. I thought that was a little weird as I haven't touched the brakes in the last 100 miles or so. I pulled off the interstate and it appears that I lost any assist to the brakes. The pedal depresses an inch of two and then it's solid.
So I'm guessing the master cylinder went out? What is the process for replacing it? I know they can be somewhat a pain as you have to bleed the cylinder and the brakes.
Any pointers are tips? Thanks in advance.
Brandon
Post Fiend
Joined: Feb 2009
Posts: 8,773
Likes: 1
From: Texas Coast
Yep
The VP should pull right at 20 or so, if there are not leaks and the pumps working. Thats at idle.
Also go check out this 1996 Bronco/F-Series Workshop Manual
See the brake & Vacuum section and you should be able to figure it out.
The VP should pull right at 20 or so, if there are not leaks and the pumps working. Thats at idle.
Also go check out this 1996 Bronco/F-Series Workshop Manual
See the brake & Vacuum section and you should be able to figure it out.
Last edited by DRRXR; Jan 2, 2012 at 01:40 PM. Reason: added vac lol
Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
Usually if the vacuum pump is bad enough to affect the brakes then heater control will default to defrost and you won't be able to control air flow.
Although rare for the issue, check out the vacuum manifold where the vacuum pump hose goes to ...
Although rare for the issue, check out the vacuum manifold where the vacuum pump hose goes to ...
Senior User
Joined: Oct 2004
Posts: 264
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From: Las Vegas
When my Vacuum pump went out I had to stand on the brakes and hope I could get stopped in time. I thought it was the mster cyl as well.
I think someone here told me to pull the Vacuum hose to the brake booster (behind master cylinder) with it running to see if there is vacuum or not.
I did and there was only a small ammount of vacuum; replaced the vacuum pump and everything was back to normal.
I hope this helps.
I think someone here told me to pull the Vacuum hose to the brake booster (behind master cylinder) with it running to see if there is vacuum or not.
I did and there was only a small ammount of vacuum; replaced the vacuum pump and everything was back to normal.
I hope this helps.
Thread Starter
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Postmaster
Joined: Jan 2004
Posts: 3,207
Likes: 0
From: Kearney, Nebr
When my Vacuum pump went out I had to stand on the brakes and hope I could get stopped in time. I thought it was the mster cyl as well.
I think someone here told me to pull the Vacuum hose to the brake booster (behind master cylinder) with it running to see if there is vacuum or not.
I did and there was only a small ammount of vacuum; replaced the vacuum pump and everything was back to normal.
I hope this helps.
I think someone here told me to pull the Vacuum hose to the brake booster (behind master cylinder) with it running to see if there is vacuum or not.
I did and there was only a small ammount of vacuum; replaced the vacuum pump and everything was back to normal.
I hope this helps.
Any tricks to replacing the vac pump? I looked at the diagrams and it doesn't seem too difficult.
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Postmaster
Joined: Nov 2009
Posts: 4,556
Likes: 0
From: Crapy southern New Jersey
You will need a power steering pulley puller, after that I think the ax pump must come out. Then it just swap out. My hardest part was putting the pulley back on the shaft.
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Post Fiend
Joined: Feb 2009
Posts: 8,773
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From: Texas Coast
Remove belt and the old pump
Use a pully puller/intaller and pull the pully(auto parts store should loan)
Remove the bolts
Just be sure to remember to install the bolts before the new pully is pressed back on.
Press pully on
And put it all back.
10mm wrench
Edit add on
My pc connection must be slow. What Doug said lol
Use a pully puller/intaller and pull the pully(auto parts store should loan)
Remove the bolts
Just be sure to remember to install the bolts before the new pully is pressed back on.
Press pully on
And put it all back.
10mm wrench
Edit add on
My pc connection must be slow. What Doug said lol
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