TM 9-4940-568-34
3-14
3-5. CRANE LOAD TEST (CONT).
TEST WEIGHT
9,890 to 9,910 LBS
(4,486 to 4,495 KG)
2
(6)
Lower hook block (2) and attach hook block to test weight (9,890 to 9,910 lbs. [4,486 to 4,495 kg]).
NOTE
Only use HOIST control lever in Steps (7) through (9). Do not use TELESCOPE or
MAST control levers or test will be invalid.
If crane will not lift test weight in Step (7), crane has failed load test. Refer to
troubleshooting task.
(7)
Lift test weight three to four ft. (0.92 to 1.2 m) up using hoist.
(8)
Lower test weight to ground using hoist.
(9)
Disconnect hook block (2) from test weight.
(10)
Attach hook block (2) to test weight (10,280 to 10,300 lbs. [4,662 to 4,672 kg]).
NOTE
Only use HOIST control lever in Steps (11) and (12). Do not use TELESCOPE or MAST
control levers or test will be invalid.
Using HOIST control lever, crane should lift test weight a maximum of 1 in. (2.5 cm)
before Overload Sensing System (OSS) disables hoist. If hoist lifts test load higher than 1
in. (2.5 cm), OSS is not functioning correctly and crane has failed load test. Perform
Troubleshooting OSS task, TM 9-4940-568-20.
OSS disables hoist only in the direction of raising. OSS does not effect hoist lowering.
(11)
Attempt to lift test weight using hoist.
(12)
Lower test weight to ground using hoist.
(13)
Disconnect hoist hook block (2) from test weight.
