Hey All, Tons of excellent info here! I've read and read and checked and checked everything I can externally on our RTV and I'm stumped. I'm very familiar with working on hydraulics, mostly dozers and skit steers, but have never worked on a Kubota of an kind.
Its a 2010 1140cpx with 3950 hours
It runs excellent, shifts excellent, neutral is good
Slow speed maneuvering seems reasonable, the pedal is responsive and progressive off idle until about 1/2 throw
On flat ground in any gear from a stop if you mash the pedal to the floor the the engine revs all the way up and it slowly gains speed up to mid 20s. If you have speed and hit a mild 5% grade (on pavement) it struggles to hold 10-12mph with one person in it. Coming up to our house which is a 9-10% grade it slows to 6-8mph. The whole time the engine sounds like its high idling, I have never heard it load up and really start working Never min bog like people describe when promoting the hand throttle In 2wd in low I don't think I could get the tires to spin if I tried, maybe on ice.
What I've done:
new kubota filters and super UDT2
checked forward relief pressure, tough to get an accurate reading but looked to be about 3350psi.
checked the unloading poppet valve (I think this is the one on the right rear of the trans) It seems to be working fine and adjusted fine.
checked the throttle/servo linkage. Looks good, both look to be at max throw at full pedal throw.
any ideas before I tear into the trans?
Its a 2010 1140cpx with 3950 hours
It runs excellent, shifts excellent, neutral is good
Slow speed maneuvering seems reasonable, the pedal is responsive and progressive off idle until about 1/2 throw
On flat ground in any gear from a stop if you mash the pedal to the floor the the engine revs all the way up and it slowly gains speed up to mid 20s. If you have speed and hit a mild 5% grade (on pavement) it struggles to hold 10-12mph with one person in it. Coming up to our house which is a 9-10% grade it slows to 6-8mph. The whole time the engine sounds like its high idling, I have never heard it load up and really start working Never min bog like people describe when promoting the hand throttle In 2wd in low I don't think I could get the tires to spin if I tried, maybe on ice.
What I've done:
new kubota filters and super UDT2
checked forward relief pressure, tough to get an accurate reading but looked to be about 3350psi.
checked the unloading poppet valve (I think this is the one on the right rear of the trans) It seems to be working fine and adjusted fine.
checked the throttle/servo linkage. Looks good, both look to be at max throw at full pedal throw.
any ideas before I tear into the trans?