Lost brake fluid ??
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Laughing Gas
Joined: Nov 2006
Posts: 773
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Lost brake fluid ??
Got in my '84 F-150...351HO..C-6..yesterday. Backed out.. ..started down lane and hit brake..Very little pedal..Back to garage...Opened MC..Front cavity near empty..Rear ..a bit low..Filled both up..and pedal has been correct since.. Could not find any leaks on garage floor...What is my next step ?..thanks..JV..........
FTE Legend
Joined: Nov 2015
Posts: 30,880
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From: Angier, NC
I think the front one is the smaller of the 2 right?
If so that would be for the rear drum brakes, the larger front disc brakes.
If you have a good pedal now and no bad metal lines (rusted) or rubber hoses that show leaking then I would pull the rear drums and check for leaking wheel cly.
Pull back the rubber cups but if it leaked that much fluid you should see the brakes wet.
When they get really bad you will see fluid leaking out of the drum and coating the inside of the tire.
The other thing that happens is when the shoes get brake fluid on them that wheel will lock up with just a little pedal pressure.
When were the rubber lines changed out?
If never then now may be a good time to change all the rubber hoses, find & fix where the fluid went to and flush the system so you have fresh fluid in it.
Dave ----
If so that would be for the rear drum brakes, the larger front disc brakes.
If you have a good pedal now and no bad metal lines (rusted) or rubber hoses that show leaking then I would pull the rear drums and check for leaking wheel cly.
Pull back the rubber cups but if it leaked that much fluid you should see the brakes wet.
When they get really bad you will see fluid leaking out of the drum and coating the inside of the tire.
The other thing that happens is when the shoes get brake fluid on them that wheel will lock up with just a little pedal pressure.
When were the rubber lines changed out?
If never then now may be a good time to change all the rubber hoses, find & fix where the fluid went to and flush the system so you have fresh fluid in it.
Dave ----
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Laughing Gas
Joined: Nov 2006
Posts: 773
Likes: 10
I have owned this truck for 15 years. It has 121K miles. I am third owner. Right ..the front is the smaller. I have never done..or had done..any brake work since I have owned it. I will further investigate,,,thanks,,jv....PS...There are pics. on the forum. It shows the Bronco buckets and console..and another of the matching red/silver trailer..j..
Lead Driver
Joined: Nov 2013
Posts: 7,163
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How often do you drive the truck, and how long since the previous time you checked the fluid levels? Just wondering if there has been a slow leak that went unnoticed over a long period.
Can the MC leak into the booster, leaving no visible evidence? Not sure, but maybe something to consider if you find nothing else.
Can the MC leak into the booster, leaving no visible evidence? Not sure, but maybe something to consider if you find nothing else.
FTE Legend
Joined: Nov 2015
Posts: 30,880
Likes: 4,117
From: Angier, NC
How often do you drive the truck, and how long since the previous time you checked the fluid levels? Just wondering if there has been a slow leak that went unnoticed over a long period.
Can the MC leak into the booster, leaving no visible evidence? Not sure, but maybe something to consider if you find nothing else.
Can the MC leak into the booster, leaving no visible evidence? Not sure, but maybe something to consider if you find nothing else.
Dave -----
Lead Driver
Joined: Jun 2013
Posts: 5,654
Likes: 1,158
From: Tolland, CT
My truck doesn't get driven much, either. But I have replaced mos oft the braking system.
As said, you need to inspect the system,
Report back here before you spend any money to fix.
As said, you need to inspect the system,
Report back here before you spend any money to fix.
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Laughing Gas
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AND THE ANSWER IS. !!!..Master Cylinder leaking...New on installed...along with ....New front rotors and pads..Bearings..etc.............No more than I drive it...This should last my Grandson for a while. !..jv..
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Laughing Gas
Joined: Nov 2006
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Master cylinder seals were the problem. I imagine it was the original M.C....After all that...we put new calipers on too...One piston was sticking....So...should last me..and my son's use...jv..
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