TM-9-2320-431-10-1

TRUCK, WRECKER, 8X8, M984A1

TECHNICAL MANUAL; OPERATOR'S MANUAL; PART 1 OF 2

JUNE 2009

TM-9-2320-431-10-1 - Page 1034 of 1244

ROTATE AND TELESCOPE BOOM - Continued

1

2

Figure 17.

2.

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

CAUTION

Keep hook block at least 1 ft. (30 cm) 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, M984A overload system will automatically

shut off power to telescope boom out, raise or lower boom, or hoist

load any higher. Overload condition can be corrected by lowering

load to ground or other supporting surface. All crane functions will be

restored in approximately six seconds.

•

When telescoping (extending) the boom, the TELESCOPE and

HOIST control levers should be operated at same time.

•

Crane movement from one lever may be slower than 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).

TM 9-2320-431-10-1

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