TM 5-3810-306-10
OPERATOR PMCS (CONTD)
INTERVAL
ITEM
NO.
B
D
A
W
M
ITEM TO BE INSPECTED
PROCEDURE: CHECK FOR AND HAVE
REPAIRED, FILLED, OR ADJUSTED
EQUIPMENT IS NOT
READY/AVAILABLE IF:
NOTE
See item 27 to check function of
Boom Angle Indicator.
NOTE
If you cannot clearly see the
hook block approaching the boom,
you should have an assistant watch
the hook block. You should be
prepared to stop the crane
immediately if the LMI system
does not function properly by
lighting the red warning light,
sounding the audible alarm and
locking the dangerous crane
movements.
a. Check anti-twoblock alarm light
and audible alarm by manually
lifting the weight attached to
anti-twoblock switches.
b. Slowly raise the main boom hook
block to bring it into contact with
switch weight. When the hook
block lifts weight, audible alarm
should sound; anti-twoblock alarm
light should light and motion of
hook block should be stopped.
Lower hook block slightly to
eliminate this condition.
c. Slowly lower or extend boom to
create a potential two-block
condition. When hook block lifts
weight, alarm should sound, anti-
twoblock alarm light should
light and 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 move-
ments are not stopped, the
system is not working properly.
The malfunction must be
corrected before operating
the crane.
Change 1 2-25
![](//www.tpub.com/assessment.jpg)