TM-9-2320-428-10
TRUCK, CARGO, 8X8, M977
TECHNICAL MANUAL; OPERATOR'S MANUAL
JUNE 2009
TM-9-2320-428-10 - Page 274 of 1072
ROTATE AND TELESCOPE BOOM - Continued
NOTE
•
When crane is overloaded, M977 and M985 overload system will
automatically shut off power to telescope boom out, raise boom, or
hoist load any higher. The M977 overload system will also prevent
lowering boom. Overload condition can be corrected by lowering load
to ground or other supporting surface by using HOIST control lever
only.
•
When telescoping the boom, the TELESCOPE and HOIST control
levers should be operated at the same time.
•
Crane movement from one lever may be slower than the other when
operating two levers together.
3.
Move TELESCOPE control lever (3) to OUT position to extend boom (2) and move
HOIST control lever (4) to DOWN position to pay out cable (5).
Figure 15.
CAUTION
Do not go over maximum load rating as shown on RANGE DIAGRAM.
Going over load ratings will cause damage to equipment.
NOTE
When operating M977 crane, raise boom to approximately 60 degree
angle to pick up maximum load.
4.
Refer RANGE DIAGRAM (6) on turntable panel (7) to raise boom (2) to correct angle
before connecting the load.
TM 9-2320-428-10
0042
0042-16
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