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 TM 5-1940-277-20
TM 1940-20/2
4.
Valve will be adjusted in sequence as shown below:
Valves Open
Valves to Adjust
1 and 4
9 and 12
8 and 10
3 and 5
2 and 6
7 and 11
9 and 12
1 and 4
3 and 5
8 and 10
7 and 11
2 and 6
5.
To adjust valve number 9, insert .018-inch feeler gauge (4) between valve stem cap (5) and rocker
arm (6) of valve number 9.
6.
Place socket (7) on adjusting screw (8) and rotate screw until feeler gauge is lightly caught between
rocker arm (6) and valve stem cap (5) of valve being adjusted. Feeler gauge should meet with only
slight drag. Remove feeler gauge (4) and socket (7).
7.
Repeat procedure for valve number 12.
8.
Rotate engine until valves 8 and 10 are open. Valves 3 and 5 may now be adjusted as in preceding
steps 7 and 8.
9.
Repeat steps 7 and 8 until all valves have been adjusted, following sequence in step 6.
10.
Replace engine rocker arm cover (refer to paragraph 3-125).
11.
Close engine hatches.
3-273
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