TB-9-2320-279-34

TB 9-2320-279-34

CAUTION

Do not contact vehicle with test bad. Damage to vehicle may result.

e. Position the inner boom 10 to 15 degrees from horizontal and the outer boom horizontal at the

maximum boom extension.

f. Attach a certified load of 4,500 pounds (plus or minus 25 pounds) to the crane hook. Use the

crane winch to raise the test load to a height of 18 inches (plus or minus three inches).

g. When test load stops swaying, measure and record the distance from the load to the ground.

h. Disengage the PTO and shut off the vehicle engine. (Refer to TM 9-2320-279-10).

i. Allow the vehicle and crane to set undisturbed for 30 minutes. Again, measure the distance be-

tween the load and the ground. Note the difference between the two measurements. The difference in

the two measurements should not be greater than 12 inches. If the difference is greater than 12 inches,

determine the cause, repair, and retest.

Rotate crane either left or right but never over crane operator. Injury or

death to personnel and/or damage to equipment may occur if crane fails

during rotational maneuver.

CAUTION

Take care not to contact vehicle with test bad. Damage to vehicle may

result.

NOTE

Always use main control panel during this crane load test. Use of the

remote controls may lead to a false overload indication.

j. Upon successful completion of steps a. through i., rotate the crane boom left and right, stopping

short of load contacting the vehicle.

k. Return boom to a position in line with centerline of vehicle. Raise boom to maximum elevation.

Raise and lower test bad with crane winch. Return outer boom to a horizontal position. Retract and ex-

tend boom. All crane movements should be smooth (without jerking); if not, determine the cause, repair,

and retest.

2-7. RECORDING LOAD RATING AND NEXT PERIODIC INSPECTION DUE DATE.

After satisfactory completion of load tests, stencil the bad rating including bad radius on the side of the

boom or mast using one-half inch letters. Stencil markings will be the same color as other vehicle mark-

ings. (Refer to TB 43-0209).

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