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 MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10 GROUP-ANCHOR WINDLASS, CAPSTAN
1. WINDLASS FAILS TO STOP AT SAME RATE OF SPEED AS STARTING.
Step 1. Check if magnetic brake out of adjustment.
Adjust magnetic brake (para. 5-66).
Step 2. Check for oil on brake band.
Remove. using cleaning solvent Fed. Spec P. D. 680.
Step 3. Check if brake band worn.
Replace band.
2. HANDBRAKE SLIPS.
Step 1. Check for brake out of adjustment.
Adjust brake.
Step 2. Check for brake band wear.
Replace band.
3. WINDLASS MOTOR.
See troubleshooting on dc motors in group 05.
CAPSTAN.
1. CAPSTAN FAILS TO STOP AT SAME RATE OF SPEED AS STARTING.
Step 1. Check for brake not properly adjusted.
Adjust brake (para. 5-66).
Step 2. Check if friction linings worn out.
Replace linings (para. 5-66).
Step 3. Check for proper airgap in magnetic brake.
Adjust airgap (para. 5-66).
2. CAPSTAN MOTOR.
See troubleshooting on dc motors in group 05.
11 GROUP-HEATING SYSTEM
1. BOILER SMOKING.
Step 1. Check for partially clogged nozzle.
Clean nozzle (para. 5-70).
2. INSUFFICIENT DRAFT OVER FIRE.
Step 1. Check for restriction in stack.
Inspect stack: remove restriction.
3. IMPROPER ATOMIZATION.
Step 1. Check for dirty screen in nozzle.
Clean screen.
Step 2. Check for nozzle orifice clogged or film or carbon over face of nozzle.
Clean nozzle.
4. ACCUMULATION UNEXPANDED GASES.
Step 1. Check if nozzle too large.
Use smaller nozzle.
5. ALTERNATELY DELAYED IGNITION.
Step 1. Check the setting of electrodes.
Adjust electrodes.
6. BOILER BURNER MOTOR.
Step 1. See troubleshooting on dc motors in group 05.
7. CONVECTORS NOT HOT ENOUGH.
Step 1. Check for low steam pressure.
Increase pressure.
Step 2. Check if thermostat setting too low.
Raise thermostat setting.
Step 3. Check if steam supply valve closed.
Align valves (para. 2-21).
12 GROUP-VENTILATING SYSTEM
1. COMPARTMENT NOT PROPERLY VENTILATED.
Step 1. Check if outlet closed or restricted.
Open outlet cover, remove restriction.
Step 2. Check if blower impeller dirty.
Clean impeller.
Step 3. Check dampers in ventilation lines.
Adjust to supply ample air.
2. BLOWER MOTOR
Step 1. See troubleshooting on dc motors in group 04.
3-18
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