Conduct the following checks BEFORE putting a new 7 1/2 Ton Crane into operation.
Engine. Check oil and coolant level and ensure all clamps on air intake system are tight. Ensure all filters are
installed. Look for oil leaks around engine. Oil level is to be maintained between ADD and FULL as indicated
Transmission. Check transmission oil level dipstick. Oil level is checked with engine running at idle speed,
transmission in NEUTRAL, and oil warm (160° to 190°F (71° to 88°C)). Oil should be at FULL line on dipstick.
Driveshafts. Visually check connecting capscrews and driveshafts for damage. Examine parking brake disc
and brake pack. Check brake function.
Axles. Visually check all attaching bolts. Check differentials and hub drives for lubricant levels. Visually check
steering cylinders and tie rods for damage. Ensure torque on all wheel nuts is 450 to 500 ft-lb (610 to 678 N·m).
Visually check tires for damage and verify air pressure.
Swing Gearbox. Check lubricant level in swing gearbox.
a. Check fuel in fuel tank.
b. Check hydraulic components and fittings for oil leaks.
c. Check batteries for electrolyte level and ensure all battery connections are tight and
d. Check brake fluid in brake reservoir.
e. Lubricate the crane according to the lubrication chart in PMCS (TM 5-3810-305-10), up to and
including two weeks (80 to 100 hours).
f. Start engine and check gages while running at low idle rpm. When engine temperature reaches
190°F (88°C), increase rpm and continue to monitor gages, making sure everything is
g. Shut engine OFF.
h. If not already on the crane, install cable, hook block, and anti-two block counterweight,
according to instructions found in Operation Under Usual Conditions (TM 5-3810-305-10).
Perform the following requirements once AFTER indicated hours of service.
8 hours: Torque wheel nuts to 450 to 500 ft-lb (610 to 678 N·m) for two-week period.
20 hours: Drain, change filter, and refill transmission with new fluid.
40 hours: Make initial replacement of hydraulic return line filter.
100 hours: Do the following.
a. Drain and change winch lubricant.
b. Tighten swing bearing capscrews. Eighteen capscrews in outer race hold upperstructure to
bearing. Twenty-two capscrews in inner race hold bearing to carrier. Tighten all 40 capscrews
to 722 ft-lb (979 N·m).
c. Tighten winch base mounting capscrews to 249 ft-lb (338 N·m).
d. Tighten counterweight capscrews to 845 ft-lb (1,146 N·m).