Lull 944E-42 Operation Manual - Manual (Page 26)

Section 2 - Pre-Operation and Inspection
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8. Operational Check - Once the walk-around inspection is complete, perform a
warm-up and operational check (see page 2-12) of all systems in an area free
of overhead and ground level obstructions. See Section 3 - Controls and
Indicators for more specific operating instructions.
WARNING
If telehandler does not operate properly, immediately bring machine to a stop,
lower boom and attachment to ground and stop the engine. Determine cause and
correct before continued use.