Lull 1044C-54 Series II Service Manual - Manual (Page 94)

Supply, Pressure, and Return Hydraulics
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6. Clean the strainer (Item 2) by back flushing with solvent. Dry the
strainer element thoroughly with compressed air. Install it as described
under “Installation” on page 5-20.
7. Install the reservoir drain plug (Item 4). Tighten two or three turns past
finger tight. If it is necessary to use thread sealant to stop fluid leakage,
apply sealant only to last few threads close to the drain plug head.
CAUTION: To avoid contamination of hydraulic system, do not apply
thread sealant to end threads of drain plug.
8. To install return filter assembly (Item 2), see “Installation” on
page 5-26.
9. Install a new breather filter assembly (Item 1).
10. Fill hydraulic reservoir. see “Filling Hydraulic Reservoir” on page 5-8.