Anti Two Block System
CONDITION CAUSE REMEDY
PANEL LIGHT & HORN WILL
NOT COME ON WITH BOOM
SWITCH WEIGHT LIFTED
Burned out fuse Check and replace fuse (8
amp only).
Broken wire Check voltage in control
panel between terminals #0
and #37. If 0 volts, check
between ignition post of
ignition switch and ground. If
12 volts available, wire to
control panel is bad. Correct.
HORN WORKS, BUT NO
LIGHT WITH SWITCH
WEIGHT LIFTED
Light bulb burned out Replace bulb.
LIGHT AND HORN ARE ON
WITH HOOK BLOCK NOT
CONTACTING SWITCH
WEIGHT
Jumper wire or jib/rooster
sheave not plugged in boom
head
Plug in.
Boom head weight wire rope
broken or hung up
Check that weight is
attached to wire and hanging
freely. If rope is caught up on
something, correct.
Jib or auxiliary boom head
switch plugged in, but no
weight
Attach weight.
Broken electrical cable or
bad connection
Check all cable for visible
damage, then remove wire
from terminals #3 and #6 in
control panel and check for
continuity. If circuit is open,
check the wires inside cable
reel, and wires from the reel
to the boom head switch. If
the wires are OK, check the
anti-two block switch. If there
is continuity between #3 and
#6 check the relay in the
panel.
RT500
Troubleshooting
240 REVISED:
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