The brakes on my '05 900 (with a coast valve installed) started feeling soft this spring, then it got to the point where the first push on the pedal went to floor. 2nd or 3rd pump would slow it down. I didn't mind it, but the Mrs. didn't care for it at all, so it got moved up on the 'to-do' list.
Bled the lines, there was a little air in the right front, but it didn't really change anything. Rear brake adjustment was OK. Next on the troubleshooting list was the master cylinder. Installed the rebuild kit I bought from Messick's, no change.
Next thought was the brake pads themselves. I thought maybe having the coast valve installed and all of the winter plowing had worn down the brakes because they weren't designed to be used all that much with the amount of engine braking it originally had.
When draining the front hubs I found out that the right front hub was pressurized, the UDT spraying all over me was the first clue.......
The problem ended up being that the O-rings in the front brake cylinder weren't containing the brake fluid. Applying the brakes was pressurizing the entire hub. This had contaminated the hub UDT with brake fluid so I still had to change the friction plates.
I was actually surprised at the old friction plates, they showed absolutely no signs of wear. Except for being wet, they looked exactly the same as the brand new ones.
The brakes work great now, and I don't have to worry about others driving it.
All is well, but I still have to wonder why it happened because the O-rings didn't show any wear or damage. The only two other things I can think of is either one of the few people that drive it stood on the brakes going down a hill instead of downshifting. Or perhaps last fall when I found the hubs low on fluid, it had actually caused damage.
Rich
Bled the lines, there was a little air in the right front, but it didn't really change anything. Rear brake adjustment was OK. Next on the troubleshooting list was the master cylinder. Installed the rebuild kit I bought from Messick's, no change.
Next thought was the brake pads themselves. I thought maybe having the coast valve installed and all of the winter plowing had worn down the brakes because they weren't designed to be used all that much with the amount of engine braking it originally had.
When draining the front hubs I found out that the right front hub was pressurized, the UDT spraying all over me was the first clue.......
The problem ended up being that the O-rings in the front brake cylinder weren't containing the brake fluid. Applying the brakes was pressurizing the entire hub. This had contaminated the hub UDT with brake fluid so I still had to change the friction plates.
I was actually surprised at the old friction plates, they showed absolutely no signs of wear. Except for being wet, they looked exactly the same as the brand new ones.
The brakes work great now, and I don't have to worry about others driving it.
All is well, but I still have to wonder why it happened because the O-rings didn't show any wear or damage. The only two other things I can think of is either one of the few people that drive it stood on the brakes going down a hill instead of downshifting. Or perhaps last fall when I found the hubs low on fluid, it had actually caused damage.
Rich