TM 9-2330-390-14&P1-21. HYDRAULIC SYSTEM.a.The hydraulic system maneuvers the front and rear dolly top and bottom beams into a series of positionsso that a shelter can be attached and lifted to riding height. Once towed to its destination, the hydraulic system lowersthe shelter to the ground.b.Each dolly half has its own independent hydraulic system.c.Power to operate the hydraulic system comes from the engine and hydraulic pump.d.The hydraulic system is configured to accommodate a redundant power kit option. If either the front orrear dolly has engine or hydraulic pump failure, the other dolly half can operate both the front and rear hydraulicsystems using the engine and hydraulic pump of the functioning dolly half and the redundant power kit (seeparagraph 2-34).e.Major components of the hydraulic system include the following:KeyComponentDescription1Positioning CylindersExtend or retract to position top and bottom beams at shelters ofvarying dimensions. Housed inside top and bottom beamtelescoping vertical tubes.2Lift CylindersExtend or retract to lift or lower shelter.1-39
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