brake master cylinder
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Freshman User
Joined: Jun 2008
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brake master cylinder
HeyI have a 1988 f150 4x4 300 and my brakes have been giving me a problem for the last couple days. I live in iowa and the last few days have been around 10-20 degrees and my brakes have been soft. I can come to a stop sign with the truck and pump the brakes and they get more firm. I cant find any leaks and the brake master cylinder is full. The front pads are pretty new also. Im stumped.
...oh and I have another question. I helped my buddy take his 95 bronco to the scrap yard. He in return gave me the gas tank out of the bronco which is rust free. I was wondering if I could swap my rear tank out for this one? Is the intank pump setup like the f150 with the low pressure pump in the tank and the high pressure pump on the frame? My tank now is rusty and the pump is not working right.
...oh and I have another question. I helped my buddy take his 95 bronco to the scrap yard. He in return gave me the gas tank out of the bronco which is rust free. I was wondering if I could swap my rear tank out for this one? Is the intank pump setup like the f150 with the low pressure pump in the tank and the high pressure pump on the frame? My tank now is rusty and the pump is not working right.
Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
Did you ever fire up your bronco? I'm sure everyone at the forum and me included, would love to hear about it. And I'm curious about the KB pistons.
Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
Likes: 6
From: Raphine, Virginia
Getting close! All I need now is the exhaust. Talked to muffler shop yesterday and will trailer it in first of Jan. Have to pick some sunny weather to schedule. No hood, fenders, top and don't want to crank it till exhaust is run. But sure is tempting.
Elder User
Joined: Feb 2004
Posts: 830
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From: Indiana
Have you checked the rubber hoses to see if they might be swelling as you apply the brakes. Would be a good idea to flush the fluid out until clear fluid comes out of all calipers and rear cylinders. I believe they recommend brake fluid change either every year or every other year. I do mine every year.
Senior User
Joined: Jun 2009
Posts: 480
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From: Hudson,Michigan
'95 Bronco tank has an FDM(fuel delivery module) which is an independent unit that has high pressure,They changed to one of these in each tank in '91.So it will not work in your system and I believe it operates at even higher pressure than your high pressure pump.I'm not sure about the hole diameter in the tank,as to if you could put an earlier Bronco pump in or not.Tank is deeper on the Bronco.Do a search on fitting the bronco tank on F150's ,there is some real good info on here or the F150 forum.
FTE Legend
Joined: May 2008
Posts: 56,542
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From: In my own world
bleed the brakes, and make sure to adjust the rear brake shoes. brake fluid probably has moisture in it, so keep bleeding all wheels until it comes out clear. gas tank will work, but you will have to get a fuel pump for 86-89 bronco for it. hole size where it goes in is the same. you have to use the bronco skid plate to hold it in, your brackets aren't long enough, and your spare tire won't fit anymore. small price to pay for a larger tank though. great for road trips with the extended range
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