Ex450 w/Cl400 loader

Eyecatcher · May 14, 2012

I don't see too much on his forum regarding the newer Yanmar tractors, so maybe I'm in the wrong fourm. I'd be very interested in talking to anyone who owns this combination, since I've got serious questions about the one I own. I have a bucket float problem that the dealer can't seem (or won't) to address. I'd like to know if anyone has the same problem.

Pete Judd · May 15, 2012

You are in the right forum, but I don't think anyone here has the newer ones yet. Mine is 32 years old, but the basics are the same as the new ones. I think that if you fully tell us of your problem and send pictures, we as a group can figure it out.

Good luck, and welcome to the forum.

Eyecatcher · May 15, 2012

I'm having a problem which the dealer calls sponge, and Prince Hydraulics (who made the loader valve) calls cavitation. When I dump a bucket of dirt and lower the bucket to the ground to pick up another load, the bucket floats. Either it will dig in or float on top. I have to pushe the control lever hard right (bucket tilt down) to pick up hydraulic power to stabilize it. Once it stabilizes, it's hard as a rock. They're
telling me that because the load dump causes the cylinder to extend very fast, that it's pulling a vacuum on the back side of the piston, causing the hydraulic fluid to boil thereby giving up air, and the pump can't keep up. When I hold the control all the way to the right, it may take 5 seconds to catch up, if I let it idle-10. I'd go along with this, except - it does it with the bucket empty. If I dump a bucket of dirt, and move forward with the bucket beyond the pile to back blade, the bucket will float over until I power it. Back blade, pick up the arms, pull forward, drop the bucket beyond the pile, and it will float again, haven't touched the bucket spool.