4. BoomOperation. Operate the boom fromminimum radius to maximum radius for the load applied.5. HydraulicCraneSlippage. Lift the test load atmaximum radius and allow time for fluid andcomponent temperatures to stabilize. Hold the loadfor 10 minutes without the operator using thecontrols. There should be no significant lowering ofthe load, boom, or outrigger beam due to a componentor system malfunction or failure during the test. Thesignificance of any lowering shall be evaluated by thecertifying officer, depending on operatingrequirements and safety.5.5.2MaximumTestLoadatMaximumRadiusofCrane(StabilityTest)1. BoomOperation. Raise and lower the boomthrough the full-working range. Visually observe forsmooth operation.Test the boom brake for properoperation. For hydraulic cranes, the test is performedwith the boom fully retracted and fully extended.2. Rotation. Rotate the crane left and right themaximum degrees allowed by the manufacturer atslow speed.Apply the brake periodically duringrotation. The brake should have the ability to stop therotating motion in a smooth, positive manner.NOTE: Where brakes are designed for holdingonly, operate controls (plugging) to stop rotation thenapply brakes. Test shall be performed with boomfully retracted and fully extended.3. HydraulicCraneSlippage. Lift the test load atmaximum radius and allow time for fluid andcomponent temperatures to stabilize. Hold the loadfor 10 minutes without the operator using thecontrols. There should be no significant lowering ofthe load, boom, or outrigger beams due to acomponent or system malfunction or failure duringthe test. The significance of any lowering shall beevaluated by the certifying officer, depending onoperating requirements and safety.5.5.3AuxiliaryandJibHoist.The test load should be the maximum load for thehoist.1. StaticTest. Raise the test load to clear theground and hold for 10 minutes. Observe anylowering that occurs that may indicate a malfunctionof the hoisting components or brakes.2. DynamicTest. Raise and lower the test load atnormal operating speeds. Lower the test load to theground until the hoist lines are slack. Wait 5 minutes,hoist the test load, and continue the test.3. HoistBrakeTest. Test the ability of the braketo control and stop the load. Next, test the ability ofthe brake to hold and lower the test load with thefriction clutch disengaged, if applicable.5.5.4Free-RatedLoadTest.To check the stability of the crane and operationof the crane carrier, wheels, tires, tracks, brakes, andso forth, under load.Retract outriggers beforebeginning the free-rated test.CAUTIONATTACH TAG LINES TO THE LOADTO CONTROL OSCILLATION.NOTE: No static test is required (not applicableto mobile cranes temporarily mounted on barge).1. Hoist the maximum free-rated test load at themaximum radius over the rear.a. Rotate the load through the “over the rear”working arc.b. Travel a minimum of 50 feet with the testload held over the rear of the crane with the boomparallel to the longitudinal axis of the crane carrier.2. Hoist the maximum free-rated test load at themaximum radius over the side.a. Rotate the load through the full-workingrange.b. Travel a minimum of 50 feet with the testload over the left and then the right side of the cranecarrier with the boom 90 degrees to the axis of travel.As outlined in the COMSECOND/COM-THIRDNCBINST11200.1series,ratedfreeloadsorpickandcarryoperationsareonlyperformedaccordingtoNAVFACP-307duringacertification,incaseofanemergency,orasdirectedbythecranecertifyingofficer.5.5.5TestAfterChangeorRepairofTires.After change or repair of tires, the crane should betested with the maximum free-rated test load over theaffected tire(s). Raise and hold the test load for 10minutes while observing the changed or repairedtire(s).5.6Weight-HandlingEquipmentUsedforOtherThanLiftCraneService.Locomotive, crawler, truck, and cruiser cranesused for clamshell, dragline, magnet, pile driving, orother nonlift crane work should be tested at the3-18
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