VIEWING WINDOW REPLACEMENT
1. Window replacement requires use of locally made wrench to fit gland slot 1/8" thick and 25/32" wide x 4" long.
Gland and window components (CL-109) are removed and replaced through spark plug test positions.
H.T. VOLTAGE SWITCH
1. Replace switch Type CL-104. To remove, rotate switch unit inside cleaner 2-1/2 turns counter-clockwise. Push
switch outward and turn knob from front of cleaner.
Solder leads to new switch and insulate with tape.
Reassemble new unit in reverse manner.
VIII. Final Inspection
After all reconditioning and testing operations, each spark plug should be individually inspected for the following defects
which could have been overlooked or undetected in processing:
A. Nicked or damaged shell and shield threads. Use suitable thread gauges.
B. Carefully examine the ceramic insulator sleeve and firing end tip for cleanliness, possible hairline cracks or
chipped conditions. Use suitable magnifying glass with good lighting source.
C. Recheck gap sizes and electrode conditions. Use suitable round wire "GO" and "NO-GO"gauges.
D. Check general condition of spark plug shielding barrel and hexagon. Use suitable tools and gauges.
IX. Rust - Proofing
If Aircraft Spark Plugs are to be stored for an indefinite period, rust-proof the shell and shielding barrel threads with an
oxidation inhibitor that will meet specification MIL-C-6529-A, Type III. Local Oil Company representatives can make a
suitable recommendation.
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