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 TM 5-1940-277-20
TM 1940-20/2
NOTE
Perform adjustment of the following tappets with cylinder number
1 at TDC position plus 360 turned clockwise.
Valve tappet clearance is optimal when a slight drag is felt on
feeler gauge being used.
The intake valve rocker lever clearance should be adjusted to
0.010 in. (0.25 mm) the exhaust valve rocker lever clearance
should be adjusted to 0.020 in. (0.51 mm).
10.
To adjust valve tappet clearance, loosen nut (2) on adjusting screw (1) with 3/8 wrench. Using
screwdriver, rotate screw (1) until feeler gauge (4) is snug between rocker arm (3) and valve stem
cap (5) of valve being adjusted.
11.
Remove feeler gauge (4) from valve stem cap (5) and rocker arm (3). Tighten nut (2) to 18 lb-ft
(24 Nm).
Cylinder
Intake Valve (I)
Exhaust Valve (E)
1
Do not set
Do not set
2
Do not set
Set
3
Set
Do not set
4
Do not set
Set
5
Set
Do not set
6
Set
Set
I
I
E
E
I
E
1
5
2
4
3
3-274.2
Change 2
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