173
MAINTENANCE NSTRUCTIONS
E719 E720 E721
CHECKING THE OIL LEVEL IN
HYDROSTATIC STEERING TANK
Check the oil level daily before starting of
operation on tractor standing on level
ground. Remove the left-hand side
bonnet shield. Screw off the dipstick,
wipe it with a rag and screw it in. The oil
level must not drop below the lower
dipstick mark after repeated dipstick
removal. Add the oil after removal of the
tank cap, if needed.
OIL CHANGE AND REPLACE-
MENT OF THE FILTER ELE-
MENT OF HYDROSTATIC
STEERING
1. Put a suitable vessel under the
hydrostatic steering tank.
2. Screw off the drain plug situated at
the tank bottom.
3. Drain the oil.
4. Unscrew the tank cap nut.
5. Remove the cap of hydrostatic
steering tank.
6. Remove and replace the filter
element.
7. Reassemble the tank cap.
8. Secure the cap position with nut.
9. Screw in the drain plug.
10. Disconnect both hoses from the
working cylinder and loosen the
return line pipe from the tank (put
vessels for the used oil under the
working cylinder hoses and under the
return line pipe).
11. Start the engine and turn the steering
wheel two or three times into both
sides with engine running at idle
(max. 10 seconds) to drive the oil out
of the steering unit and from pipes.
12. Secure the tractor against movement
and lift the front axle.
13. Put a vessel for oil under the working
cylinder and by turning the wheels
(by hand) drive the oil out of the
working cylinder.
14. Reinstall all disconnected connec-
tions.
15. Fill the tank with oil and bleed the
hydrostatic steering circuit.
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