Operator’s Manual
EI65 / 0005
© PAT
Rev. C 06/15/00 // CSH
056-065 / 190005_c.doc
18
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
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 EI65 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.
4. Check that the display of the main boom length agrees with the actual boom length.
5. Check that the display of the main boom angle agrees with the actual angles.
6. Check that the display of the operating radius of the crane agrees with the actual radius.
