TM 10-3510-222-24
Table 3-3. DIRECT SUPPORT DRYER TROUBLESHOOTING PROCEDURES
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
DRYER CYLINDER DOES NOT OPERATE.
Step 1. Check for defective starter circuit and relay wiring. Using a multimeter, test wiring for continuity.
If wiring is damaged, repair or replace defective wiring. Refer to FO-4, Dryer Wiring Diagram.
Step 2. Check for damaged roller chain.
If roller chain is damaged, replace roller chain. Refer to paragraph 3-72, Roller Chain.
Step 3. Check for cracked, worn, or broken cylinder drive motor parts, damaged or loose shaft threads, and bent
shaft.
If motor is damaged, replace motor. Refer to paragraph 3-33, Compressor and Motor.
Step 4. Check for defective trunnion. Check for rough rotation of shafts and sprockets.
If trunnion is damaged, replace or repair trunnion. Refer to paragraph 3-71, Trunnion.
2.
DRYER HOT AIR BLOWER DOES NOT OPERATE.
Step 1. Check for broken starter wiring. Use a multimeter and test wiring for continuity.
If starter wiring is defective, repair or replace defective wiring. Refer to FO-4, Dryer Wiring Diagram.
Step 2. Check for cracked, broken, or worn hot air blower parts and bent motor shaft.
If hot air blower is damaged, repair. Refer to paragraph 3-70, Hot Air Blower.
3.
DRYING TAKES TOO LONG.
Check for cracked, worn, or broken exhaust motor parts.
If motor is damaged, replace motor. Refer to paragraph 3-70, Hot Air Blower.
4.
DRYER'S HEATED AIR IS NOT DRAWN THROUGH TUMBLER.
Step 1. Check for defective hot air blower. Check for loose coupling and for missing or damaged parts.
If defective, replace hot air blower. Refer to paragraph 3-70, Hot Air Blower.
Step 2. Check for defective dryer hot air blower motor. With power off, remove hot air blower motor connection box
cover. With power on, measure 120 vac between each leg and ground.
If hot air blower motor voltage is present and motor does not turn, replace hot air blower motor. Refer to
paragraph 3-70, Hot Air Blower.
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