Lull 1044C-54 Series II Service Manual - Manual (Page 118)

Supply, Pressure, and Return Hydraulics
5-36 31200079
CAUTION: Before removing support bracket or loosening capscrews that
secure the hydraulic pump to the transmission (Item 7),
support the pump to ensure that it does not twist or fall.
3. Remove capscrews (Item 19), lockwashers (Item 20), and flatwashers
(Item 21) securing upper pump support bracket (Item 22) to the pump.
4. Remove two (2) capscrews (Item 3) and lockwashers (Item 4) securing
the hydraulic pump to the transmission.
5. Pull the pump straight out from the transmission and take it to an
appropriate area for further inspection.
CAUTION: To avoid contamination of system, cap hoses and cover
opening in transmission after pump is removed.
Inspection and Maintenance, Hydraulic Pump
The following steps describe cleaning and replacement of fittings and
O-rings for the hydraulic pump after it has been removed.
1. (Ref. Fig. 5-23) Remove and discard O-rings (Items 6 and 8).
2. Make notes of positions of hydraulic fittings shown in Fig. 5-22 and
Fig. 5-23. Tag and remove all fittings. Clean with appropriate solvent
and dry with compressed air. Inspect and replace if damaged.
3. Clean exposed areas of hydraulic pump with appropriate solvent and
dry with compressed air.
4. (Ref. Fig. 5-23) Lubricate and install new O-rings on pump.
5. Lubricate threaded portion of each fitting, including the O-ring.
Steps 6 thru 14 apply to Fig. 5-22. Refer to notes made earlier for correct
positioning of all fittings.
6. Install connector (Item 6) in lower port on front of pump.
7. Install run tee (Item 17) on top of pump.
8. Install branch tee (Item 5) on side of pump.
9. Install reducer adapter (Item 4) on the branch tee (Item 5).
10. Install connector (Item 15) on side of pump.
11. Install swivel run tee (Item 12) on side of pump.
12. Install elbow (Item 13) on side of pump.