TB-9-2320-279-34

TB-9-2320-279-34 - Page 6 of 29

TB 9-2320-279-34

CHAPTER 2

PROCEDURES

2-1. CLASSIFICATION OF TESTS.

Table 2-1 lists the tests which are to be employed to safety certify applicable HEMIT cranes. Table 2-2

lists the load ratings which are to be stenciled on the applicable HEMTT crane after completion of all load

tests. (Refer to paragraph 2-7). The load rating is the maximum authorized load that maybe lifted by

that specific HEMIT crane. Two different types of testing are described in this bulletin:

a. Static testing, as used in this technical bulletin, is defined as lifting or lowering of the test load

without traversing.

b. Dynamic testing, as described within the bulletin, includes traversing the test load.

Table 2-1. Classification

The difference in the test requirements between Test Classification II

(125 percent) and Test Classification Ill (110 percent) is due to the dif-

ference in overload protection systems of the HIAB and Grove Cranes.

Test Classification I is a static overload protection test performed to assure proper setting of overload

protection switches on Grove Cranes.

Test Classification II is a static proof test performed to assure the structural integrity of Grove Cranes at

125 percent of the maximum rated load or the maximum load the crane overload protection system will

allow the crane to lift,

2-1

NOT E