TM 5-3895-383-24NOTICEIf a testing time longer than three (3) minutes is required,rotate the drum periodically in order to lubricate theeccentric weight shaft bearings.NOTE:The hydraulic oil temperature should be at least38° C (100° F).Illustration 47Vibratory Pump(1) Test port.High Amplitude1.Make sure that the parking brake is applied. Ensurethat the propel control lever is in the STOP position.2.Connect a 60000 kPa (8700 psi) pressure gauge torelief valve test port (1).Illustration 48Control Console(2) Vibratory amplitude control. (3) Vibratory ON/OFF control.3.Move amplitude selector (2) to the HIGH AMPLITUDEposition.4.Install the Multitach in order to measure engine rpm.Install 4C-6500 Digital Thermometer into the hydraulicoil tank. Start the machine and run the machine at highidle (2350 ± 50 RPM) until the hydraulic oil temperaturereaches 38C (100F).5.Look at the gauge and depress vibratory control switch(3) to the ON position in order to start the vibratorysystem.NOTE:The force that is needed to overcome the inertiaof the weights causes the pressure in thevibration system to momentarily reach the highamplitude relief valve setting. Look at the gaugeand turn on the vibration system. The highestreading on the gauge is the high amplitude reliefvalve setting.6.The high amplitude relief valve setting should be 35000± 3000 kPa (5076 ±435 psi).Illustration 49Vibratory Pump(4) High amplitude relief valve.7.If the high amplitude relief valve setting is not correct,high amplitude relief valve (4) must be adjusted.Illustration 50Relief Valve Cartridge(5) Spindle. (6) Collar. (7) Lock screw.11-48
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