TM 5-3810-305-23
0016
SYMPTOM
HORN WORKS BUT NO LIGHT WITH ANTI-TWO BLOCK COUNTERWEIGHT LIFTED; CONTROL
DISCONNECTS WILL NOT ENGAGE
MALFUNCTION
Light Bulb Burned Out.
CORRECTIVE ACTION
Replace panel bulb (WP 0067).
SYMPTOM
LIGHT AND HORN ARE ON WITH HOOK BLOCK NOT CONTACTING ANTI-TWO BLOCK COUNTERWEIGHT;
CONTROL DISCONNECTS WILL NOT ENGAGE
MALFUNCTION
Anti-Two Block Counterweight Chain Broken or Hung Up.
CORRECTIVE ACTION
Ensure counterweight is attached to chain and hanging freely.
MALFUNCTION
Electrical Cable Broken or Bad Connection.
CORRECTIVE ACTION
1.
Check all cables for visible damage, then check plug terminals #37 and #38 at control panel and
check for continuity. If circuit is open, check wires inside cable reel, wires from reel to anti-two
block switch, and anti-two block switch on boom head. If continuity exists, check relay in panel
2.
Replace faulty component.
MALFUNCTION
Anti-Two Block Switch Defective.
CORRECTIVE ACTION
1.
Check for correct mechanical operation.
2.
If correct, remove cover and wires from terminals #1 and #2. With arm pulled down there should
be a closed circuit between terminals. With arm up, circuit should be open.
3.
If all conditions are not met, replace anti-two block switch (WP 0067).
0016-2
03/15/2011Rel(1.8)root(tswp)wpno(T00021)
