Operator's Manual
DS 350 / 1319
© PAT Rev. 8 05/19/03
191319_8.DOC
34
6.5 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.
3. Check the spring-loaded cable reel to be sure it is free to rotate, has tension and the cable is
reeled properly.
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 LMI 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.
1. 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.
d) Slowly extend (telescope) 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 telescope out function should be stopped. Lower the load
handling device slightly to eliminate this condition.
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