ASSEMBLE HEATER (AVIM)
Check mark on end of feeler gage (T63) (46).
Gage shall read within limits of area B (50). If
not, reset spark gap as follows:
Pull feeler gage (T63) (46) out until gage
is free of ground electrode (6). Make sure
tapered end of feeler gage (T63) is bottomed
against thimble gage (47).
Pivot feeler gage (T63) (46) and bend spark
plug thimble (T62) (47) to obtain proper spark
gap. Turn feeler gage (T63) to increase or
decrease spark gap.
When proper spark gap is obtained, push
feeler gage (T63) (46) into thimble gage
(T62) (47) until feeler gage contacts ground
Repeat step 35.
Remove feeler gage (T63) (46) and thimble gage
(T62) (47) from heater (45).
Make sure thimble gage reading is
within limits of area B before installing
igniter plug. If gage does not read in
area B, igniter plug will not be installed
in correct position.
Install igniter plug (51) and gasket (52).
Torque igniter plug (51) to 335 inch-pounds.
Perform operational check (TM 55-1520-240-T).
END OF TASK