B. Depress "Compound Blast" lever for about five seconds with other hand.
C. Release "Compound Blast' lever and depress "Air Blast" lever for about five seconds to blow off loose
compound particles which may cling to the plug.
D. Inspect the firing end cavity of plug with AV24-1 Inspection Light.
E. If heavy combustion or lead deposits are noted, set plug aside for cleaning per AV19-3 Vibrator Unit
F. If no deposits are noted and plug is not satisfactorily clean, a second or even a third cleaning cycle "A"
through "C"can be applied. Three five second cycles or total of fifteen seconds.
Due to the fast cleaning action of unit, lengthy random cleaning is not recommended because spark plug electrode or
insulator tip damage could result from excessive cleaning.
4. Maintenance:
A. Use only AC Aircraft Compound type CL-3. Purchase separately type CL-73 rubber nozzle and install a
new one each time the cleaner is refilled.
B. One half package (2-1/2 pounds) of compound will clean about 300 spark plugs. Examine compound
weekly and replace when it looks like fine dust. A more accurate test would be to push the end of a pencil
into the compound, remove pencil and notice if compound flows back into hole. If it compacts, replace.
Shake clinging dust from inside cloth filter sleeve before removing compound container. Discard worn
compound. Add new compound type CL-3. Replace rubber nozzle type CL-73.
C. Open water trap daily to avoid water accumulation. Damp compound will reduce efficiency of cleaning
action.
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