Spark Plug Servicing Instructions
1. Position unit on bench for easy Spark Plug cleaning and testing. Three mounting holes provided in base for
securing to bench.
2. Attach Air Line (120 to 150 psig) to trap by use of Quick Disconnect Coupling.
3. Plug A. C. Cord in to Power Supply Receptacle (110-120 Volts, 60 cycle). Three wire A. C. cord supplied with
unit. If receptacle is two wire, use three wire A. C. adapter supplied with unit, and properly ground third wire.
4. Raise lid, remove rubber plug adapter and pour cleaning compound into blast chamber.
1. Select rubber spark plug adapter to fit spark plug being cleaned. Hold in place over blast chamber by use of
2. Place 14 mm or short reach 18 mm spark plugs in adapter to gasket seat. Long reach 18 mm spark plugs insert
approx 1/2 of total thread length.
Spark plugs should be cleaned and free from all oil, grease, and cleaning fluids for best cleaning
3. Hold spark plug with one hand and rotate terminal end in circular motion approximately one inch in diameter and
push "sand" button with other hand for about five seconds.
4. Using same circular motion, push "Air" button for about five seconds to clear clinging particles of compound from
5. Using inspection light, inspect firing end of spark plug. If spark plug has heavy combustion or lead deposits, set
aside for cleaning on vibrator unit. (See cleaning instruction on Vibrator Unit.)
6. If slight or no deposits are noted but plug is not cleaned satisfactorily, a second, or a max. of three cleanings can
7. Inspect terminal end of spark plug. If cleaning is necessary, refer to instructions on Insulation Cleaning Tool.
1. Use recommended cleaning compound conforming to type III-MIL-C-744B.
2. Compound should be changed after approx. 300 spark plugs have been cleaned. Replace spark plug adapters
and nozzle when necessary.
3. Drain moisture trap in air supply line daily to avoid an accumulation of water. Cleaning efficiency will be reduced
with damp compound.