TM 55-1520-240-23-10
13-6.1
ASSEMBLE HEATER (AVIM)
(Continued)
13-6.1
7.
Install igniter plug (13) and washer (14).
8.
Torque igniter plug (13) to 335 inch-pounds.
9.
Check the spark gap using a wire feeler gage
thru the nozzle opening (16) in the combustion
plate. The gap is 0.15 to 0.18 inch.
Use care when adjusting concentricity
with screwdriver to prevent damage to
spark plug ceramic.
10.
Check the concentricity of the igniter plug (13)
and the shroud (15) by viewing the end of the
igniter plug thru the opposite igniter plug port
(17). If concentricity is satisfactory, go to step
11. If adjustment of concentricity is required,
remove igniter plug, insert a one-half inch rod
(18) through opposite igniter plug port (17) into
end of shroud (15) and adjust shroud by bending.
13-39
