TM 5-3810-307-10
4. 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.
WARNING
If the light and audible alarms 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.
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.
G-32 Change 1
