Replacing Oil And Hydrostatic Steering Filter Element; Venting Hydraulic Circuit Of Hydrostatic Steering - Zetor MAJOR Operator's Manual

Replacing oil and hydrostatic steering filter element

1. place a suitable vessel under the hydrostatic
steering tank
2. unscrew drain screw at the bottom of the tank
3. drain the oil
4. unscrew the nut of tank cap
5. demount the cap of hydrostatic steering tank
6. remove and replace filter element
7. set the lid of the tank back in
8. lock its position with a nut
9. screw drain screw back in
10. disconnect both hoses from working roller and
waste pipeline from the tank (place vessels for used oil
under working roller hoses and waste pipeline)
11. start the engine and with idle run (max. 10 seconds)
turn the steering wheel 2-3 times to both sides so that you
pushed oil from control unit and pipeline
12. secure the tractor against movement and lift front drive
axle
13. place a vessel for oil under the working roller
and by turning the wheels (manually) push the oil from
working roller
14. do the back assembly of all disconnected joints
15. fill the tank with oil and vent hydrostatic steering circuit

Venting hydraulic circuit of hydrostatic steering

1. secure the tractor against movement and lift the front axle
2. start the engine and allow it to run for approximately 1 minute in idle run
3. turn the steering wheel several times to both sides with idle run
4. with maximum engine revolutions, turn the steering wheel 3 times alternately slowly and quickly to both
sides to restricting wheel stop
5. stop the engine
6. after completing the venting check or replenish the oil level to control gauge line. Check the tightness of all
joints and hydraulic circuit guide-ways of hydrostatic steering
7. lower the tractor down to front wheels
MAINTENANCE INSTRUCTIONS
E722
90
NM14D019
E721