TM 5-3820-256-10
WARNING
When raising the boom, keep the boom top at least 10 feet away from any type of electrical line or other
electrical source.
(6)
Move the boom switch to the UP position to raise the crane main boom (8). Elevate the boom to a position
where rotation will not be blocked by any part of the truck or deck load.
WARNING
Make sure all personnel are a safe distance from the crane when rotating or extending the boom.
(7)
Move the rotation switch to the left for counterclockwise rotation, or move it to the right for clockwise
rotation.
CAUTION
On telescoping booms, operate the winch to unwind wire line when extending the boom. Be sure to wind
up the wire line when retracting the boom.
(8)
Extend the manual-pullout extension boom (4) as follows:
(a)
Remove clinch pin (5) and pull out the manual extension pin (6).
(b)
Pull out the manual-pullout extension boom (4) to the intermediate or fully extended position.
(c)
Aline the pin holes and reinstall the manual extension pin and clinch pin.
(9)
Extend or retract the hydraulic extension boom (7) by moving boom switch out or in.
WARNING
Before attempting to lift a load, check the load lifting chart (see figure 2-30) on the crane base. Never
exceed the manufacturer's rating. Always keep your eyes on a moving load.
(10) If the load is greater than 3,800 pounds and crane is rigged with one-part line, change to two-part line
as follows (see figure 2-31):
(a)
Snap winch line hook over pin at rear of boom point to form a two-part line loop.
(b)
Loosen the handwheel bolt on the snatch block and open the side plate. Slip the snatch block over the two-
part line loop.
2-58
