JLG Lull 1044C-54 II Series Service Manual page 309

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9. Start engine and cycle frame tilt fully left and right several times to
purge air from hydraulic system. Lower boom and shut off engine.
10. Inspect for hydraulic leaks and repair as necessary.
11. Check oil level in hydraulic reservoir and add as necessary. See "Filling
Hydraulic Reservoir" in Section 5 for procedures.
Frame Tilt and Oscillation
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