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 NOTE: The classified spacers which you use must be
____ equal to the thickness of the removed parts (Dimension A), plus or minus 0.010 inch (0.254 mm).
 3)  Use a maximum of two classified spacers with each igniter plug (4).
 NOTE: The total thickness of the classified spacers
____ must not be more than 0.30 inch (7.62 mm) at each igniter plug location.
 ~.......................................................................... | | Dimension A | | Classified Spacer ................................................... | Part Number | Inches | Millimeters | ............................................................................ | 741073 CL 1 | 0.008 - 0.018 | 0.20 - 0.46 | | 741073 CL 2 | OVER 0.018 - 0.028 | OVER 0.46 - 0.71 | | 741073 CL 3 | OVER 0.028 - 0.038 | OVER 0.71 - 0.97 | | 741073 CL 4 | OVER 0.038 - 0.048 | OVER 0.97 - 1.22 | | 741073 CL 5 | OVER 0.048 - 0.058 | OVER 1.22 - 1.47 | | 741073 CL 6 | OVER 0.058 - 0.068 | OVER 1.47 - 1.73 | | 741073 CL 7 | OVER 0.068 - 0.078 | OVER 1.73 - 1.98 | | 741073 CL 8 | OVER 0.078 - 0.088 | OVER 1.98 - 2.24 | | 741073 CL 9 | OVER 0.088 - 0.098 | OVER 2.24 - 2.49 | | 741073 CL 10 | OVER 0.098 - 0.108 | OVER 2.49 - 2.74 | | 741073 CL 11 | OVER 0.108 - 0.118 | OVER 2.74 - 3.00 | | 741073 CL 12 | OVER 0.118 - 0.128 | OVER 3.00 - 3.25 | | 741073 CL 13 | OVER 0.128 - 0.138 | OVER 3.25 - 3.51 | | 741073 CL 14 | OVER 0.138 - 0.148 | OVER 3.51 - 3.76 | | 741073 CL 15 | OVER 0.148 - 0.158 | OVER 3.76 - 4.01 | | 741073 CL 16 | OVER 0.158 - 0.168 | OVER 4.01 - 4.27 | | 741073 CL 17 | OVER 0.168 - 0.178 | OVER 4.27 - 4.52 | | 741073 CL 18 | OVER 0.178 - 0.188 | OVER 4.52 - 4.78 | 2........................….........................….......................1
 Spacer Classification Data
 Table 401

 S 224-016-N00
 (3)  Do the igniter plug immersion depth check (AMM 74-21-02/601) if the thickness of the parts is not available and if:
 -
the igniter plug boss (2) was removed or replaced, or

 -
the classified spacer (1) was removed or replaced.

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 74-21-02
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S 424-043-N00
 (4)  Install the classified spacers (1) and the igniter plug boss (2) if:
 -
the classified spacers (1) or the igniter plug boss (2) were removed or replaced, and

 -
the thickness of the parts was found for installation.

 S 424-044-N00
 (5)  If removed, install the igniter plug boss.
 (a)  Clean the threads of the igniter plug boss (2) with the petroleum solvent to remove carbon particles and thread lubricant.
 CAUTION: DO NOT USE SILVER GOOP ON THE THREADS OF THE IGNITER PLUG
_______ BOSS IF A DIFFERENT LUBRICANT WAS USED BEFORE. IF SILVER GOOP IS USED WHERE OTHER LUBRICANTS WERE USED, IT CAN BECOME HARD AFTER THE ENGINE OPERATES.
 (b)  Lubricate the outer threads of the igniter plug boss (2) with the silver goop lubricant or the Fel-Pro C-200.
 NOTE: Do not apply too much lubricant to the igniter plug
____
 threads.

 (c)  
Install the classified spacer (1) or spacers to the igniter plug boss (2).

 (d)  
Install the igniter plug boss (2) to the diffuser base.

 (e)  
Tighten the igniter plug boss (2) to 375-440 pound-inches (42.4-49.7 newton-meters).

 (f)  
Safety the igniter plug boss (2) with lockwire or safety cable and safety cable ferrule.

 S 424-045-N00
 (6)  Install the igniter plug.
 (a)  If necessary, clean the threads of the igniter plug (4) with petroleum solvent to remove the carbon particles and thread lubricant.
 CAUTION: DO NOT USE SILVER GOOP ON THE THREADS OF THE IGNITER PLUG
_______ IF A DIFFERENT LUBRICANT WAS USED BEFORE. IF SILVER GOOP IS USED WHERE OTHER LUBRICANTS WERE USED, IT CAN BECOME HARD AFTER THE ENGINE OPERATES.
 (b)  Apply the silver goop lubricant to the threads of igniter plug (4).
 NOTE: Do not apply a large quantity of lubricant to the
____
 igniter plug threads.

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