TM5-3810-305-10Lower Load with Winch1.2.3.4,5.6.7.NOTEIf there is no load on hookproceed to Retract Boom.Bring hand pump pressure hose up to winchand remove smallest cap on the connector tee.Disconnect the brake hose from the tee in thelowering port on the winch motor.Entry of air into lowering portwill cause winch motor to cavi-tate. The winch motor loweringport tee must be capped to pre-vent load from free falling whenhand pump pressure is applied.Failure to follow this procedurecould cause DEATH or seriousinjury.Install cap on winch motor lowering port tee.Connect connector tee to winch brake hose.When working the hand pump,clear all personnel from the area.Failure to follow this procedurecould cause DEATH or seriousinjury.Close pressure release lever on pump. Pumpslowly until winch brake is released. Theload will lower slowly to the ground.With the load safely down, open pressurerelease lever on hand pump.Disconnect brake hose from connector tee andreattach to lowering port tee. Install cap onconnector tee.8. Using a wrench on the swing box, rotate up-perstructure back to the travel position.Retract Boom1.2.3.4.5.Never disconnect hydraulic linesor fittings before venting pres-sure. Turn dipstick cap 1/4 turnto safety notch to relieve pres-sure. Failure to follow thisprocedure could cause SERIOUSINJURY.Turn dipstick 1/4 turn to safety notch torelieve pressure.Locate counterbalance valve on top of boomextend cylinder at base of boom.Loosen jam nut on counterbalance valve ex-tending up from valve block and turn theadjusting screw in until it bottoms (Figure 4-54). Keep track of number of turns requiredto bottom out screw.Figure 4-54. Holding Valve (Adjusting Screw)Turn ignition switch ON and pull back onboom telescope lever until boom is fully re-tracted.NOTEIf boom retracts, proceed to step12.Remove hose from retract port adapter oncontrol valve extend/retract section (firstsection from the left side) (refer to Figure 4-53).4-58
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