5.4.1Hoist.5.5 Load Test1. Raise and lower the hook through thefull-working distance of hook travel.2. Run the hoist block into the limit switch orswitches, if installed, at slow speed.3. Run the hoist block beyond the limit switch orswitches by using the bypass switch.5.4.2Boom.1. Raise and lower the boom through thefull-working range.2. Raise the boom into the upper limit switch(when installed). Raise the boom past the boomupper limit switch using the bypass switch.3. Test the lower limit switch (when installed) bythe same proecdure prescribed for testing the upperlimit switch.4. Extend and retract telescoping boom sectionstheir full distance of travel.5. Check the radius indicator by measuring theradius at the minimum and maximum boom angle.5.4.3Motion.Other motions, including swing, shall be operatedthrough one cycle (one-full revolution of majorcomponents).The load test consists of basically two parts: amaximum load test and a stability test. The followingtest sequence is time and cost cffcctivc. The sequencemay be varied by the activity.5.5.1MaximumTestLoadfortheCraneonMainHoist.1. StaticTest. Raise the test load to clear theground with the boom at minimum radius and hold for10 minutes without boom and load hoist pawls (dog)engaged. Rotate the load and hook to check bearingoperation. Observe any lowering that may occur thatmay indicate a malfunction of the boom or hoistingcomponents, brakes, or outriggers. For hydrauliccranes, tests are performed with the boom fullyretracted and fully extended.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 test load, and continue on with the test.3. HoistBrake. Test the ability of the brake tocontrol and stop the load (fig. 3-18). Test the abilityof the brake to hold and lower the test load with thefriction clutch disengaged, if applicable.Figure 3-17.—Marking hydraulic rams.3-17Figure 3-18.-Hoist brake.
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