5-30 LeeBoy 6150 Conveyor Paver
Maintenance
Use the following procedure for replacing either of the
gear pumps:
1. Access the gear pump slated for replacement.
2. Label and disconnect the hoses to the gear pump,
capping the tting on the pump.
3. Label, plug and cap the hoses.
4. Remove the two screws on the pump mount (one on
each side of mount).
5. Lift the pump assembly out of the machine and
place on a at surface.
6. Remove and inspect the O-ring(s) on end of the
pump for wear or damage. Replace if needed.
7. Put a small amount of hydraulic oil onto the O-Ring
and reinstall.
8. Align the mounting holes with the mounting on the
pump.
9. Reattach with the two mounting screws and torque
to 89 ft. lbs. (12 N•).
10. Remove plug caps and reconnect hydraulic hoses
to pump as previously labeled.
11. Check hydraulic oil level. Add more if needed.
12. Start the paver and check to be sure there are no
hydraulic oil leaks.
13. Let machine idle approximately 10 minutes to allow
the pump and motor cases to ll with hydraulic oil.
Hydrualic Pumps
Hydraulic uid is transmitted throughout the machine to
motors and cylinders, becoming pressurized accord-
ing to the resistance present. The uid is controlled by
valves and distributed through hoses and tubes. Three
hydraulic pumps play a signicant role in producing
hydraulic power as it supplies hydraulic uid to system
components: The propel, tandem gear and auxiliary
gear pumps. (Figure 5-37)
Front of Paver
Rear of Paver
Tandem
Gear Pump
Propel
Pump
Auxilliary
Gear Pump
(Option)
Figure 5-37. Gear Pumps
The tandem gear pump and propel pump are accessed
via the right access panel. The tandem gear pump is
attached to the propel pump (just behind it). (Figures
5-37 and 5-38). Both are easily reached via the right
access panel. The auxiliary gear pump is easier to
access from the front access panel inside the hopper.
Figure 5-38. Tandem Gear Pump
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