M977 and M985 Operating Procedures (Cont)
To avoid damage to outrigger leg or load hook, do not
hit outrigger leg with load hook.
Operate MAST control lever (7) in UP position until the mast (8) is
fully erect and the cylinders are fully extended. Use BOOM control
lever (5) simultaneously as required to maintain the boom (6) at
approximately 45_ above horizontal until the mast is fully erect. Hold
the mast control lever (7) to UP position for 2-3 seconds after mast is
fully erect to ensure cylinders are fully filled with oil.
Operate crane with manual controls (para 2-18d and 2-18e) or
REMOTE CONTROL UNIT (para 2-19).