TM 5-3825-226-24
VALVES
(1)
9N3617 Spring for valves (new):
Length under test force ........... 1 655 in. (42.04 mm)
Test force ............................. 50 ± 5 lb. (220 ± 22 N)
Use again minimum load at length
under test force .................................. 35 lb. (155 N)
Length of spring at valve open
position .................................... 1.167 in (29.64 mm)
Use again minimum load at valve
open position .................................154.5 lb. (687 N)
Free length after test ............... 1.855 in. (47.12 mm)
Outside diameter .................... 1.440 in. (36.58 mm)
Spring must not be bent more than .065 in. (1.65 mm)
(1)
9L9190 Spring for valves (new):
Length under test force ............. 1.715 in (43.56 mm)
Test force ............................. 35 ± 5 lb. (155 ± 22 N)
Use again minimum load at length
under test force .................................. 23 lb. (100 N)
Length of spring at valve open
position .................................. 1.215 in. (30.86 mm)
Use again minimum load at valve
open position ......................................145 lb (645 N)
Free length after test ............... 1.855 in. (47.12 mm)
Outside diameter .................... 1.440 in. (36.58 mm)
Spring must not be bent more than 065 in. (1.65 mm)
(2)
Distance from the end of
the valve to the valve spring
spacer seat ........ 2.063 ± .015 in. (52.40 ± 0.38 mm)
(3)
Diameter of valve stem:
9L7682 Intake Valve...................3725± .0005 in. (9.462 ± 0.013 mm)
Use again minimum diameter
of the valve stem ....................... .371 in. (9.42 mm)
9L7683 Exhaust Valve (tapered stem):
Head end of valve
stem ..........3705 + .0005 in. (9.411 + 0.013 mm)
Use again minimum diameter of
the head end of valve stem ..... 369 in. (9.37 mm)
Lock end of valve
stem ......... .3715 ± .0005 in. (9.436 ± 0.013 mm)
Use again minimum diameter of the lock
end of valve stem ............. .3704 in. (9.408 mm)
Bore in the valve guides (intake
and exhaust) . .3745 ± .0005 in. (9.512 ± 0.013 mm)
Maximum permissible bore in the valve guides (worn):
Measure .75 in. (19.0 mm) deep
in valve guide bore from both
ends of the valve guide ..... .3760 in. (9.550 mm)
(4)
Angle of valve face:
Intake valve ................................................ 30° ± 15'
Exhaust valve ............................................. 45° ± 15'
(5)
Diameter of valve head
(intake valve) ..... 2.094 ± .005 in. (53.19 ± 0.13 mm)
Diameter of valve head
(exhaust valve) .. 1.804 ± .005 in. (45.82 ± 0.13 mm)
(6)
Thickness of valve lip:
Intake valve ................................ .091 in. (2.31 mm)
Use again minimum valve lip thickness ................. .070 in. (1.78 mm)
Exhaust valve ............................. .063 in. (1.60 mm)
Use again minimum valve lip thickness ...................044 in. (1.12 mm)
1-13