New to the forum, just came across a JD 3020 Diesel Power shift tractor. Tractor starts like a champ and runs strong. However, it lags when put into gear, the three-point assembly will not raise and neither will the loader. Drained and flushed the transmission, changed the filters, and pulled the sump screen. The sump screen was covered with metal shavings. The break away coupler in back that the loader hydraulic lines attach too do not appear to be pressurized and when removed,(selector lever in the open position) very little hydraulic fluid comes flowing out. New to tractors but learning as I go. Any help would greatly be appreciated.
- Thread starter lanterjm
- Start date
You need a FACTORY service manual to troubleshoot it, mucking away blindly and trying different things that may not be needed will dig you into a DEEP money pit darned fast.
You will start by checking transmission pump flow and operating pressure.
What is left of the transmission pump flow after the needs of the various transmission clutches and brakes and PTO clutch or brake "charges" the main (front) hydraulic pump.
Without an adequate oil flow to the front of the tractor, the main pump can't function.
If you are LUCKY the metal you see is from the brakes going "metal-to-metal, but if that's the case, there should be mushed up friction material in the sumps screen. Unless it has been previously cleaned after there linings fell apart and got chewed up.
Sorry to say, but if the metal isn't coming from the brakes you DO have a "money pit"!
You will start by checking transmission pump flow and operating pressure.
What is left of the transmission pump flow after the needs of the various transmission clutches and brakes and PTO clutch or brake "charges" the main (front) hydraulic pump.
Without an adequate oil flow to the front of the tractor, the main pump can't function.
If you are LUCKY the metal you see is from the brakes going "metal-to-metal, but if that's the case, there should be mushed up friction material in the sumps screen. Unless it has been previously cleaned after there linings fell apart and got chewed up.
Sorry to say, but if the metal isn't coming from the brakes you DO have a "money pit"!
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Welcome to YT.
IMHO if you haven't already bought the tractor you should RUN AWAY from it. Hyd & trans repairs can get very high $$$$$$. You could check frt hyd pump drive coupler to be sure pump shaft spins when engine is running as they've been know to strip out.
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