TM 9-4520-251-14
4-34 SPARK PLUG
This task covers:
a. Removal
d. Installation
b. Cleaning/Adjustment
e. Testing
c. Inspection
INITIAL SETUP
Tools
Materials/Parts
Tool kit, service, refrigeration unit
Spark plug
(Appendix B, Section Ill, Item 1)
Wire brush, 0.030 inch (0.76 mm)
Wire gauge
Plug wrench, 13/16–inch
Location/Item
Action
Remarks
REMOVAL
1. Spark plug
Rotate bail (1) down and
shield
remove cap (2).
2.
Cable terminal
Remove cable terminal (3).
3. Spark plug
Remove spark plug (4) using
13/16–inch plug wrench.
CLEANING/ADJUSTMENT
CAUTlON
Do not use abrasive cleaning machine to clean spark plug.
4. Spark plug
Clean with pen knife or wire brush. Set gap at
0.028 to 0.033 inch (0.711 to 0.838 mm) using
wire feeler gauge.
4-78
