TM 10-3950-672-10
When traveling, keep the lights on, use traffic warning flags and signs, and use front and rear flag vehicles. Check state
and local restrictions and regulations.
Drive carefully and avoid speeding.
Before traveling a crane, check suitability of proposed route with regard to crane height, width, and length.
Secure the turntable before moving crane, use the swing lock.
Stay alert at the wheel.
When parking on a grade, apply the parking brake and chock the wheels.
CAUTION
When moving in tight quarters, post a look-out to help guard against collisions or bumping structures.
2-3. CRANING OPERATION.
WARNING
Check crane stability before lifting loads. Ensure the outriggers (or tires if lifting on rubber) are firmly positioned on solid
surfaces. Ensure the crane is level, brakes are set, and the load is properly rigged and attached to the hook. Lift the
load slightly off the ground and recheck the stability before proceeding with the lift. Determine the weight of the load
before you attempt the lift. Check the load chart against the weight of the load.
Most accidents involving mobile hydraulic cranes are caused by the following:
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crane out of level
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bad surface conditions
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outriggers used improperly or not used at all
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inadequate blocking under outrigger floats
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improper crane operation.
After the crane has been properly set-up, make a dry run before making the first lift. Become familiar with all factors
peculiar to the job site. Know what moves to make BEFORE attaching the first load. Plan ahead.
Unless lifting within On Rubber capacities, the outriggers must be fully extended to provide maximum leveling of the
crane. Remove all weight from tires before lifting on outriggers.
Use adequate cribbing under outrigger floats to distribute weight over a greater area. Check frequently for settling.
Use the sight level bubble indicator to ensure crane leveling.
Use the load line to determine the levelness of the crane. It should always lie in the center of the boom. Check at two
points 90 degrees apart.
2-8
