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Did you check the master cylinder in your pre trip inspection?
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Help, lost Brakes today.
- Thread starter tklm539
- Start date
Here is a problem that I did not find described before - my apologies if I missed it.
The story so far:
Brakes were dragging, so I rebuilt air pack.
Then the brakes would go soft after awhile, replaced MC.
All was good for some time, but recently they started going soft again. I had enough braking power for ranch land use, but not on the road.
So this evening I decided to start with the simplest thing and bled the brakes. I also installed an extra reservoir in the cab like I have seen some of you do.
After bleeding I had great pedal pressure, the airpack was making a nice whooshing sound, but the brakes will hardly actuate. It is much worse now.
Any ideas?
The story so far:
Brakes were dragging, so I rebuilt air pack.
Then the brakes would go soft after awhile, replaced MC.
All was good for some time, but recently they started going soft again. I had enough braking power for ranch land use, but not on the road.
So this evening I decided to start with the simplest thing and bled the brakes. I also installed an extra reservoir in the cab like I have seen some of you do.
After bleeding I had great pedal pressure, the airpack was making a nice whooshing sound, but the brakes will hardly actuate. It is much worse now.
Any ideas?
OK - now I am even more confused. The truck would seem to have fixed itself overnight . . . magical elves, I guess. When I went out for round two this evening everything worked great.
Very odd . . . . . my best guess is that something in the boost pack was sticking, but I would love any insight from you more experienced guys.
Very odd . . . . . my best guess is that something in the boost pack was sticking, but I would love any insight from you more experienced guys.
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I had a panic stop in my 98 Suburban and soon after had a spongey pedal. I got it home and crawled under it and found a small pin hole had been produced in a rusted area of brakeline I lost a lot of fluid out of that hole and had to replace the entire nine foot section of brakeline.
Funny thing is I didn't want to mess with bleeding it so I took it to Pep boys. I told them of the empty new line and that it would require extra bleeding time. After walking around the store about 50 times I went to check on it and they had given up not knowing what to do. I told them let it down a little and I got my vacume pump brake bleeder out of the back and did it myself. The manager wanted to give me a job right there, I told him sorry the Army has other things in mind.
Funny thing is I didn't want to mess with bleeding it so I took it to Pep boys. I told them of the empty new line and that it would require extra bleeding time. After walking around the store about 50 times I went to check on it and they had given up not knowing what to do. I told them let it down a little and I got my vacume pump brake bleeder out of the back and did it myself. The manager wanted to give me a job right there, I told him sorry the Army has other things in mind.
dmetalmiki
Well-known member
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Silicone is NOT fixotropic! (absorbs moisture)..used in "things Military" BECAUSE they often stand for yonks! (ours do? between shows? and so stops the accumalation of water (and rust forming!) in the bottoms of cylinders. Dot fluids are tropc and in regular use get hot therefore tending to vaporate moisture in use. agree with other posts. (if not for cost allone!) all mine are converted to dot 4. flushed absalutely.. and sreviced regularly. silcone and dots can and DO form a gell (because OLD dots bieng f.t. try to mix thier moisture with silicone!!..A.NO NO!! K>