OldBlueDually
Full Access Member
- Joined
- Jun 8, 2020
- Posts
- 2,428
- Reaction score
- 8,518
- Location
- Minnesota
- First Name
- Justin
- Truck Year
- 1976 GMC
- Truck Model
- C30
- Engine Size
- 455 Olds
Hey gents, I was hoping not to spend a ton of money here (I am so far over budget right now I am cringing and not even close to done), but being as how I have NOT worked with squares until this point, maybe you guys can give me some advice.
Advice I am looking for;
1.) Would you use a re-build kit on the master cylinder and booster pump (or send booster in for rebuild)?
a.) If you would buy a kit, where would you buy them (Rock Auto has master cylinder re-build kit, but not for booster pump)
b.) Or could this lead to other problems (or just not work), and buying new makes more sense because you may be money ahead?
2.) How would you correct the leaking issue at the pass side caliper?
a.) Bend the line slightly to clear the drop spindle?
Back story on the problems: 2 weeks back I cleaned up my master cylinder reservoir, the small one in front was fairly clean with some fluid in it, but I cleaned it out (stuffing shop rags in it to get out fluid). The back large one was dried up, had some scaling rust in it, and chunks of old fluid. I cleaned this out also with a few shots of brake cleaner (not down into ports) and some scrubbing with shop rags.
I then stuffed shop rags in both reservoirs and sanded the top of the master cylinder with my flat block hand sander to clean up the lid sealing surface. I then cleaned the rubber seal, and the top cap where the rubber meets that cap. After that I carefully lifted out the rags and then blew compressed air into it (about a foot away) to get any light dust out. At this point I wiped it down again with a brake cleaner soaked rag, then blew out again and filled with Dot3 brake fluid, pumped the brakes a few times and just let it sit.
Over these last 2 weeks, I would occasionally walk by and just give the brake a couple pumps and walk away (couldn't work on it anyhow, life is too busy).
A few days later I have a red puddle (not the color of brake fluid) on my garage floor under the master cylinder & pump that got larger over this 2 weeks, that left quite a trail as you can see. I assume this is power steering fluid, and I also assume its because my booster pump is leaking.
Picture of the of the master cylinder and booster.....including underside of them....
On the passengers side I have a puddle of fluid on the garage floor that also got big over the last two weeks (to the front bumper in fact), and the inside of my rim and tire are wet from brake fluid. I also noticed fluid on the rear side of the inner fender well (like fluid shot up at it from pumping the brakes). I took this below connection apart just tonight and cleaned metal surfaces up to a shine, and also cleaned the copper washers, re-installed & tightened down.
After this I had my wife push on the brakes for me tonight, and that leak is coming from here at the connection to the caliper (did not squirt, it puddled up quick and started dripping). Look how this line is routed, it is touching the inside of my drop spindle, and is also lightly touching the upper ball joint nut. Is this correct????
Circle is where leak is coming from (I am pretty sure, suppose it could be elsewhere on that connection), and arrow is showing where the line is touching.
Thank you in advance!!!
Advice I am looking for;
1.) Would you use a re-build kit on the master cylinder and booster pump (or send booster in for rebuild)?
a.) If you would buy a kit, where would you buy them (Rock Auto has master cylinder re-build kit, but not for booster pump)
b.) Or could this lead to other problems (or just not work), and buying new makes more sense because you may be money ahead?
2.) How would you correct the leaking issue at the pass side caliper?
a.) Bend the line slightly to clear the drop spindle?
Back story on the problems: 2 weeks back I cleaned up my master cylinder reservoir, the small one in front was fairly clean with some fluid in it, but I cleaned it out (stuffing shop rags in it to get out fluid). The back large one was dried up, had some scaling rust in it, and chunks of old fluid. I cleaned this out also with a few shots of brake cleaner (not down into ports) and some scrubbing with shop rags.
I then stuffed shop rags in both reservoirs and sanded the top of the master cylinder with my flat block hand sander to clean up the lid sealing surface. I then cleaned the rubber seal, and the top cap where the rubber meets that cap. After that I carefully lifted out the rags and then blew compressed air into it (about a foot away) to get any light dust out. At this point I wiped it down again with a brake cleaner soaked rag, then blew out again and filled with Dot3 brake fluid, pumped the brakes a few times and just let it sit.
Over these last 2 weeks, I would occasionally walk by and just give the brake a couple pumps and walk away (couldn't work on it anyhow, life is too busy).
A few days later I have a red puddle (not the color of brake fluid) on my garage floor under the master cylinder & pump that got larger over this 2 weeks, that left quite a trail as you can see. I assume this is power steering fluid, and I also assume its because my booster pump is leaking.
You must be registered for see images attach
Picture of the of the master cylinder and booster.....including underside of them....
You must be registered for see images attach
You must be registered for see images attach
On the passengers side I have a puddle of fluid on the garage floor that also got big over the last two weeks (to the front bumper in fact), and the inside of my rim and tire are wet from brake fluid. I also noticed fluid on the rear side of the inner fender well (like fluid shot up at it from pumping the brakes). I took this below connection apart just tonight and cleaned metal surfaces up to a shine, and also cleaned the copper washers, re-installed & tightened down.
After this I had my wife push on the brakes for me tonight, and that leak is coming from here at the connection to the caliper (did not squirt, it puddled up quick and started dripping). Look how this line is routed, it is touching the inside of my drop spindle, and is also lightly touching the upper ball joint nut. Is this correct????
Circle is where leak is coming from (I am pretty sure, suppose it could be elsewhere on that connection), and arrow is showing where the line is touching.
You must be registered for see images attach
Thank you in advance!!!
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