TM 5-3810-307-10
As the crane is lifted, all wheels should remain in the same position
relative to fenders.
WARNING
Suspended axles and wheels/tires can fall when
carrier IGNITION switch is actuated or crane is
rotated. Death or serious injury can result from being
crushed by falling suspension. When on outriggers,
ensure areas beneath crane and adjacent to wheels
are clear of all personnel before swinging
superstructure to the rear or actuating carrier
IGNITION switch.
m.
Slowly rotate superstructure to the rear. As boom approaches within 6 of
directly over-rear position, both front wheels (only) should fall to full
extension of front suspension lockout cylinders. The rear tires should
remain in the same position relative to fenders.
n.
Rotate superstructure to front, return boom to its boom rest, and retract
outrigger stabilizers, placing crane back on its wheels.
o.
Shut down engine: test is complete.
5-12.14
Emergency Boom Operating Procedures. Although improbable the boom
lift cylinders hydraulic equalizer line could fail. If this occurs, there are devices that allow continued
crane operation. All crane functions remain operable until the hydraulic oil in the reservoir is
depleted. The most important thing is to get the boom in a safe position so that repairs can be
made. The following procedures are recommended for getting the boom to a safe position should
the equalizer line fail.
a.
Don't panic. Remain in cab. All functions can be accomplished from the
cab.
b.
Maintain engine at normal operating speed.
c.
Maintain desired boom angle by pulling back on boom control joystick as
necessary. With oil leaking from the hydraulic system, boom angle will drop
if you do not react.
d.
While maintaining boom at this angle: activate swing; retract boom; and
operate hoist(s) as necessary until load is safely lowered to ground.
e.
If over-the-side, retract as much boom as possible and then lower boom. If
over-the-front, it will not be necessary to retract boom. Remember, boom
cannot be lowered to minimum elevation over-the-rear, as boom would hit
engine hood.
5-106
