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 TM 5-2420-224-34
CYLINDER HEAD REPAIR (CONT)
15. TO CORRECT exhaust valve seat
COUNTERBORE width (7), USE 150-degree
R E A M E R or GRINDSTONE to remove
material from face of counterbore (5).
valve
seat
16. TO CORRECT intake
C O U N T E R B O R E width (8), USE plane
REAMER to remove material from face of
counterbore (5).
17. REMOVE all CHIPS and GRIT from valve
seat counterbores (5).
18. CHECK all valve seat COUNTERBORES (5)
for irregularity (step 8).
NOTE
is the same for all
Procedure
valves.
APPLY COAT of LUBRICATING OIL to valve
19.
STEM (9).
INSTALL VALVE (10), washer (11), spring
20.
(12), and retainer (13).
21.
C O M P R E S S SPRING (12) and INSTALL
COLLET (14). The split must be equal on
both sides of collet.
22.
LIGHTLY TAP all valve STEMS to ensure
proper seating of entire valve assembly.
13-12
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