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FRAME 22 - TM-9-2815-210-34-2-20254
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TM-9-2815-210-34-2-2 Engine Assembly Diesel (MULTIFUEL): Naturally Asspirated or Turbocharged Fuel-Injected Water-Cooled 6-Cylider Manual
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Table 4-49. Exhaust Valve Seat Inserts and Counterbores Wear Limits
TM 9-2815-210-34-2-2
FRAME
23
NOTE
I f no exhaust valve seat inserts (1) were taken out, go
to para 4-19c(2).
T w o sizes of exhaust valve seat inserts (1) are used in
c y l i n d e r h e a d s ( 2 ) .  C y l i n d e r head can use a combination
o f exhaust valve seat insert sizes.  M e a s u r e each exhaust
v a l v e seat counterbore (3) to tell whether to put in a
s t a n d a r d size or oversize exhaust valve seat insert.
R e a d i n g s must be within limits given in table 4-49. The
l e t t e r T shows a tight fit.  I f readings are not within
g i v e n limits, throw away part and get a new one.
1.
M e a s u r e and note inside diameter of three exhaust valve seat counterbores (3).
I f diameter is 1.8080 to 1.8095 inches, this is a standard size exhaust valve
s e a t c o u n t e r b o r e .  If diameter is 1.8180 to 1.8195 inches, this is a 0.0100-
inch oversize exhaust valve seat counterbore.
NOTE
U s e d exhaust valve seat inserts, (1) that were not worn
w e r e tagged so they can be put back in the same place.
B e c a u s e machine shop may have machined some standard
s i z e exhaust valve seat counterbores (3) into oversize
e x h a u s t valve seat counterbores, some exhaust valve
seat inserts may be too small.
M e a s u r e and note outside diameter of each exhaust valve seat insert (1) to be
2.
put in.  S t a n d a r d size exhaust valve seat inserts go in standard size exhaust
valve
seat
counterbores
(3).  F o r 0.0100-inch oversize exhaust valve seat
c o u n t e r b o r e s , u s e 0 . 0 1 0 0 - i n c h o v e r s i z e e x h a u s t v a l v e s e a t i n s e r t s .  R e f e r to
t a b l e 4-49. for exhaust valve seat insert sizes.
M e a s u r e fit of each exhaust valve seat insert (1) in its exhaust valve seat
3.
counterbore (3).
GO TO FRAME 24
4-235

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