Hello all D9h 90V08500 Trans pump hose blew from pump to filters, lost a lot of oil so dropped remaining oil, found some metal in converter so I replaced bearings. On first test drive I walked the tractor 10m and then pulled it up to check leaks etc. Since then it’s had no drive in any gear I only have 320 psi at priority valve My thoughts are pump or sucking air, However is it possible there may be a internal leak in the brakes , steering clutches etc? Are there any procedures testing pressure, such as pushing brakes? Any suggestions/information much appreciated? I’m only a simple cow poke
test the P1 P2 pressures
Thank you If priority valve is not receiving 400psi would the p.1 & p.2 expected to have 0 pressure?
P1 100psi P2 0 psi
Replaced O rings and pump no change, no leaks obvious
Was the high pressure filters changed and the filter case drained and cleaned, next thing is to pull the Priority valve to bits and strip /clean the little filter inside the slug.
Thanks for your reply, I should of mentioned Penrite sae 30 was used to replace the oil, filters have been changed and pressure control and priority valve have been dissembled and cleaned I am going to do them both again What is the correct term for the left pedal ? Which I call a brake clutch , disengages the system whilst in gear Is it possible it is stuck causing a bypass ? Should I be looking more into steering clutches and brakes?
Yes, if your not getting pressure to the priority valve the steering clutches and brakes tap off the line going to the priority valve. Should make 275 +/- 25 psi with steering clutch released and 395 +/- 15psi in neutral and brake activated.
Did you go deep into the priority valve to access and clean the filter located inside the valve slug #16 as TCT suggested.?