Operator's Manual
DS 350 / 1334
© PAT
Rev. D 04/12/02 CSH
190072_d.DOC
42
Pre-Operation Inspection and Calibration Verification
After the electrical connections have been checked to insure that the system is properly connected for the
crane configuration, the following checks shall be made:
1.
Check the electrical wiring connecting the various parts of the system for physical damage.
2.
Check the anti two-block switches and weights for free movement.
The following tests shall be performed with care to prevent damage to the machine or injury to
personnel. Proper functioning of the system requires successful completion of these tests before
operating the machine.
If the operator cannot see the load-handling device approaching the boom nose, he shall have an assistant
(signal person) watch the load-handling device. The operator shall be prepared to stop the machine
immediately should the RCL system not function properly as indicated by lighting the red warning light (4),
sounding the audible alarm (12) and locking the crane movements, hoist up, telescope out and boom
down.
3.
Check the anti two-block alarm light (4) and the audible alarm (12) by performing one of the following
tests:
a.
By manually lifting the weight attached to the anti two-block switches. When the weight is lifted,
the audible alarm (12) should sound, the anti two-block alarm light (4) should light.
b.
Slowly raise the main boom load-handling device to create a potential two-block condition. When the
load-handling device lifts the weight, the audible alarm (12) should sound, the anti two- block alarm
light (4) should light and the motion of the load-handling device should be stopped. Lower the load-
handling device slightly to eliminate this condition.
c.
Slowly lower the boom to create a potential two-block condition. When the load-handling device lifts
the weight, the audible alarm (17) should sound, the anti two-block alarm light (24) should light and
the boom lowering function should be stopped. Lower the load-handling device slightly to eliminate
this condition.
If the light and audible alarm do not function as described and the crane movements are not stopped,
the system is not working properly. The malfunction shall be corrected before operating the crane.
4.
If the crane is equipped with a boom extension, repeat the test procedure for the boom extension anti
two-block switch.
5.
Check that the display of the main boom length agrees with the actual boom length.
6.
Check that the display of the main boom angle agrees with the actual boom angles.
7.
Check that the display of the operating radius of the crane agrees with the actual radius.
8.
Check the load display by lifting a load of known weight.