UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES - QUARTERLY SCHEDULE (CONT)

TM 3-4230-209-20&P

2-16

UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES - QUARTERLY SCHEDULE (CONT)

Item to be

Procedures

Inspected

Item No.

Inspect nozzle holder and ignition plug. Disassemble nozzle

Boiler

and clean screen on nozzle with dry cleaning solvent (item

14, app D). Check that the gap between the ignition plug

electrode and the combustor-plate electrode is 5/32-inch.

CAUTION

Do not bend ignition plug electrode.

Adjust as needed by bending the combustor plate elec-

trode. Replace plug if unserviceable. Replace burner nozzle

if damaged.

Inspect the condition of the spark arrester in the exhaust

Spark Arrester

stack for possible damage to the screen. If screen is torn or

has puncture holes, replace spark arrester.