TM 9-2330-390-14&P
2-21. OPERATING HYDRAULIC CONTROL VALVE (Con't).
(6)
The positioning cylinders lever (5) has a fourth position-FLOAT When in FLOAT position, the
positioning cylinders (2) work in unison with the lift cylinders (1) as the lift cylinder levers (3) are operated. To engage
this position, quickly push up on positioning cylinders lever beyond the RETRACT position. Once in FLOAT position,
the lever will remain in FLOAT until pulled back down to NEUTRAL position.
b. Placing Dolly Half in Maneuverlng Position.
DO NOT operate control valve levers to put front or rear dolly In maneuvering position
unless telescopic brace and front axle steering locking pin are Installed. Telescopic
brace and front axle steering locking pin must ALWAYS be Installed before lift cylinders
reach their vertical position. Failure to follow this warning may cause front or rear dolly
to overturn, resulting in serious Injury or death to personnel.
Use extreme caution to ensure that near (left side) top beam vertical tube does not
contact control valve and fittings and cause damage when placing dolly half In
maneuvering position. Carefully follow all steps and monitor position of lift cylinders
and plvoting tray to guard against binding and Interference.
NOTE
The maneuvering position Is a three-wheel configuration. The dolly half’s center of
gravity Is shifted over the axle, the top beam Is resting over the drawbar, and the axle
Is level with the ground. In this position, the dolly half can be easily moved and
positioned where required.
Before proceeding, ensure that all stowed ltems such as rear drawbar, ladder, and
lntradolly air hoses and cable have been removed; air bags must be deflated;
transportation lockouts have been secured to top beam vertical tubes with stowage
straps; and toolbox has been closed (see paragraph 2-8).
The following steps are performed at the front and/or rear dolly as required.
Procedure begins with bottom beam resting on ground with top and bottom beams
vertical and engines running at high Idle.
(1)
Ensure that front axle steering locking pin is installed to lock steering (see paragraph 2-7). Ensure
that telescopic braces are installed (see paragraph 2-8).
(2)
Pull down on positioning cylinders lever (5) to extend positioning cylinders (2) until telescopic
brace (7) reaches rest pin (6).
(3)
Quickly push up on positioning cylinders lever (5) to FLOAT position.
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