TM 9-2330-390-14&P2-21. OPERATING HYDRAULIC CONTROL VALVE (Con't).(6)The positioning cylinders lever (5) has a fourth position-FLOAT When in FLOAT position, thepositioning cylinders (2) work in unison with the lift cylinders (1) as the lift cylinder levers (3) are operated. To engagethis 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 positionunless telescopic brace and front axle steering locking pin are Installed. Telescopicbrace and front axle steering locking pin must ALWAYS be Installed before lift cylindersreach their vertical position. Failure to follow this warning may cause front or rear dollyto overturn, resulting in serious Injury or death to personnel.Use extreme caution to ensure that near (left side) top beam vertical tube does notcontact control valve and fittings and cause damage when placing dolly half Inmaneuvering position. Carefully follow all steps and monitor position of lift cylindersand plvoting tray to guard against binding and Interference.NOTEThe maneuvering position Is a three-wheel configuration. The dolly half’s center ofgravity Is shifted over the axle, the top beam Is resting over the drawbar, and the axleIs level with the ground. In this position, the dolly half can be easily moved andpositioned where required.Before proceeding, ensure that all stowed ltems such as rear drawbar, ladder, andlntradolly air hoses and cable have been removed; air bags must be deflated;transportation lockouts have been secured to top beam vertical tubes with stowagestraps; 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 beamsvertical and engines running at high Idle.(1)Ensure that front axle steering locking pin is installed to lock steering (see paragraph 2-7). Ensurethat telescopic braces are installed (see paragraph 2-8).(2)Pull down on positioning cylinders lever (5) to extend positioning cylinders (2) until telescopicbrace (7) reaches rest pin (6).(3)Quickly push up on positioning cylinders lever (5) to FLOAT position.2-132
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