All hydraulic system fails to function.
Replace fuse.
Low oil supply.
Fill system with proper oil to center of hydraulic reservoir sight tube.
Clogged suction line.
Clean line.
Damaged pump drive coupling.
Replace coupling.
Pump faulty.
Replace pump.
Oil escapes at reservoir breather.
Reduce oil to center of sight tube.
Excessive speed on rough terrain.
Select slower target speed.
Booms level or fold too fast.
Use correct orifices, properly installed. (See your John Deere dealer.)
Lift arms drop too fast.
Booms fold too slow.
Remove orifice, clean and reinstall.
Incorrect orifice.
Install correct orifice. (See your John Deere dealer.)
Some functions work erratically or not at all.
Fill tank to proper level.
Loose or disconnected wires at switch or solenoid.
Check and repair connections.
Failed solenoid coil.
Replace coil.
Erratic steering.
Clean oil cooler and screens.
All hydraulic functions but one do not work or are slow.
Clean or replace check valve or (see your John Deere dealer).
One hydraulic function fails to work properly.
Replace.
Bad switch.
Repair or replace.
Check valve sticks shut in load sense line of hydraulic valve.
Clean or replace check valve.
Solenoid or hydraulic function faulty.
Hydraulic spool not shifting properly.
Clean or replace or (see your John Deere dealer).
OUO6092,000055C-19-20040115