M977 and M985 Operating Procedures (Cont)
2-18. M977, M985 CRANE OPERATION (MANUAL CONTROLS) (CONT).
Do not raise vehicle tires off ground with outrigger
jack cylinders. Vehicle could roll causing serious
injury or death. Always chock front wheels when
Crane must be level from side to side. Use of crane
in unlevel position can cause vehicle to tip over
causing possible serious injury or death.
Operate left and right outrigger jack (LH O/R JACK
and RH O/R JACK) control levers at same time.
Crane movement from one lever may be slower than
the other when operating two levers together.
Vehicle weight should be off rear axle just enough so
tires still have firm contact with ground but do not
bulge from weight.
Move left outrigger jack (LH O/R JACK) and right outrigger jack (RH
O/R JACK) control levers (9 and 10) to DOWN position. Lower left
and right outrigger jack cylinders (8) until vehicle weight is off rear