LOAD TESTING PROCEDURE
THIS WORK PACKAGE COVERS
Boom Cylinder Drift Test, Extension Cylinder Drift Test
Tools and Special Tools
WP 0004 00
Tool Kit, General Mechanic's (Item 128, WP 0289
2 x 4 x 3 ft
RTCH parked on level smooth pavement
Parking brake applied (TM 10-3930-675-10)
Hydraulic temperature at 150F (66C)
Construction Equipment Repairer (2)
DO NOT stand directly under tophandler or container while performing this procedure.
Inspect the lift cylinders, blocking valves and hoses before starting this procedure.
Failure to do so may result in injury or death.
Certifier is the Safety Officer of the Installation.
BOOM CYLINDER DRIFT TEST
Operate RTCH hydraulics to warm hydraulic oil temperature to 150F (66C).
Use right arrow key and advance to fourth operator screen to monitor temperature.
To lessen the time needed to warm the hydraulic temperature to 150F (66C), hold the engine
RPM approximately 1,000 to 1,500 and fully retract the boom and hold. This will force the
hydraulic oil through the over relief valve and raise the temperature quicker.
Make sure the blocking valve float and emergency lowering valves are fully closed before starting
Use the heaviest container available within the weight range 35,000 to 53,000 lb (15,876 to 24,040
kg) for the test procedure.
Boom and tophandler must be properly calibrated before performing the test procedure. Cali-
After raising hydraulic oil temperature to 150F (66C) cycle boom up and down to increase oil temperature in lift cyl-
inders (at least 12 cycles).
Cycle boom extension in and out 10 cycles to raise temperature in boom extension cylinder.
Engage and lift 20-ft ISO weighted container approximately 1 to 2 ft (30 to 60 cm) off ground.