PAT EI 65 Operator's Manual page 26

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5. PRE-OPERATION INSPECTION
Prior to operating the crane, the following checks must be made:
1. Check the cabling 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.
3. Check the anti two-block alarm light (2) and the audible alarm by performing one of the
following tests a, b, or c. If the crane is equipped with a boom extension, perform the test
procedure on both the main boom and boom extension anti two-block switches.
When checking system the operator must use caution. If the operator cannot see the load
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handling device approaching the boom nose, he/she shall have an assistant (signal person)
watch the load handling device. The operator shall be prepared to stop the machine
immediately should the EI 65 system not function properly by lighting the red warning
light, sounding the audible alarm and locking the dangerous crane movements.
a) Check the anti-two block alarm light (2) and the audible alarm by manually lifting the
weight attached to the anti- two block switches.
b) Slowly raise the main boom hook block to bring it into contact with the switch weight.
When the hook block lifts the weight, the audible alarm should sound, the anti-two block
alarm light (2) should light and the motion of the hook block should be stopped. Lower the
hook block slightly to eliminate this condition.
c) Then slowly lower or extend the boom to create a potential two-block condition. When
the hook block lifts the weight, the audible alarm should sound, the anti-two block alarm
light (2) should light and the boom lowering and/or boom extension function should be
stopped.
NOTE: 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 must be corrected
before operating the crane.
EI65 OPERATOR'S AND CALIBRATION MANUAL
L-B B5L0082/PAT 031-300-190-015 REVISION D 04/15/99