Installation, Operator’s & Calibration Manual
Radio Anti-Two-Block
©PAT Rev. F 03/26/03
190136_f
10
With optional lockout installed the following additional tests must be performed:
•
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 should sound, the anti two- block alarm
light should light and the motion of the load-handling device should be stopped. Lower the load-
handling device slightly to eliminate this condition.
•
Slowly lower the boom to create a potential two-block condition. When the load-handling device
lifts the weight, the audible alarm should sound, the anti two-block alarm light should light and the
boom lowering function should be stopped. Lower the load-handling device slightly to eliminate this
condition.
•
Slowly extend (telescope) the boom to create a potential two-block condition. When the load-
handling device lifts the weight, the audible alarm should sound, the anti two-block alarm light
should light and the boom telescope out function should be stopped. Lower the load-handling
device slightly to eliminate this condition.
If the light and audible alarm does 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.
If the crane is equipped with a second transmitter, repeat the test on the second transmitter.
