mpilihp
Silver Member
So this probably could happen to any hydraulic brake system but unfortunately its happening to my Pasquali's brakes. Whats happening is after sitting with no use the next time I go to use the tractor there is no brake pedal pressure.
A little history, when I got the tractor, 5-7 or so years ago the brakes were bad and I replaced the wheel cylinders and master cylinder and all was well, great pressure and worked fine. Then last year one day I went to use it there was no pedal pressure. Before this happened I did press HARD on the pedal to hold the tractor in place while twitching a log out and this could have contributed Im now thinking.
Looking the brakes over I found no leaks, I could bleed the brakes and they would work for a day but the next time I used it the pressure was lost again. Since I could not see any fluid leaking I decided I must have damaged the master cylinder, maybe the primary cup and while sitting fluid was leaking past back up the line into the reservoir.
So last fall I bought a new master cylinder, primed and then installed it and all was well, till this spring. When I took the tractor out the brakes were flat, I bleed them and started using the tractor and was using it pretty consistently every few days. Now after sitting for over a week when pulled it into the garage to work on the clutch cable I found it with no brake pedal pressure again.
So my question is what can be causing the fading and loss of pressure? I still see no leaks very weird. For kicks I bleed one wheel cylinder and it appears to let air out and then fluid and pressure built up. By the time I put my tools away and cleaned up to pull the tractor out the pressure was gone again.
Im at a loss as to whats causing this, any ideas??
Thanks ~ Phil
A little history, when I got the tractor, 5-7 or so years ago the brakes were bad and I replaced the wheel cylinders and master cylinder and all was well, great pressure and worked fine. Then last year one day I went to use it there was no pedal pressure. Before this happened I did press HARD on the pedal to hold the tractor in place while twitching a log out and this could have contributed Im now thinking.
Looking the brakes over I found no leaks, I could bleed the brakes and they would work for a day but the next time I used it the pressure was lost again. Since I could not see any fluid leaking I decided I must have damaged the master cylinder, maybe the primary cup and while sitting fluid was leaking past back up the line into the reservoir.
So last fall I bought a new master cylinder, primed and then installed it and all was well, till this spring. When I took the tractor out the brakes were flat, I bleed them and started using the tractor and was using it pretty consistently every few days. Now after sitting for over a week when pulled it into the garage to work on the clutch cable I found it with no brake pedal pressure again.
So my question is what can be causing the fading and loss of pressure? I still see no leaks very weird. For kicks I bleed one wheel cylinder and it appears to let air out and then fluid and pressure built up. By the time I put my tools away and cleaned up to pull the tractor out the pressure was gone again.
Im at a loss as to whats causing this, any ideas??
Thanks ~ Phil
