TM-9-2320-428-10

TRUCK, CARGO, 8X8, M977

TECHNICAL MANUAL; OPERATOR'S MANUAL

JUNE 2009

TM-9-2320-428-10 - Page 291 of 1072

ROTATE AND TELESCOPE BOOM - Continued

CAUTION

Boom must be above vehicle sides for clearance. Hitting side of vehicle

with boom may cause damage to equipment.

NOTE

Operate control levers with light, even pressure. Moving lever slightly will

cause slow movement of crane. Moving lever to full travel will cause faster

movement of crane.

1.

Move SWING control lever (1) to CW position to move boom (2) clockwise.

Figure 4.

2.

Move SWING control lever (1) to CCW position to move boom (2) counterclockwise.

CAUTION

Keep hook block at least 2 ft. (0.61 m) from end of boom. If hook block

hits end of boom it may damage cable or hook block and crane will lose

power. Wait six seconds for power to return and check crane for damage.

NOTE

•

When crane is overloaded, vehicle overload system will automatically

shut off power to telescope boom out, raise boom, or hoist load any

higher. Vehicle 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.

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