TM 10-3930-641-34-1
VALVES SPECIFICATIONS
(Sheet 1 of 2)
(1)
4N5906 Spring for valves (new):
Length under test force ................................. 2.165 in. (54.9 mm)
Test force .........................................77.5 + 3.9 lb. (35.2 + 1.8 kg)
Use again minimum load at length
under test force ..................................................... 71 lb. (32.2 kg)
Length of spring at valve
open position ................................................. 1.665 in. (42.3 mm)
Use again minimum load at valve
open position ....................................................... 191 lb. (86.6 kg)
Free length after test ....................................... 2.47 in. (62.7 mm)
Outside diameter ........................................... 1.250 in. (31.8 mm)
Spring must not be bent
more than ........................................................... 086 in. (2.2 mm)
(2)
Height to top of valve
guide.............................................. 1.27 + .03 in. (32.3 + 0.8 mm)
(3)
Diameter of valve
stem (new)......................... .3717 + .0003 in. (9.441 + 0.008 mm)
Use again minimum:
7N4580 Exhaust ............................................. 3704 in. (9.41 mm)
4N5654 Intake ................................................ 3708 in. (9.41 mm)
Bore in valve guide with guide installed in
the head (new).................... 3735 + .0010 in. (9.487 + 0.025 mm)
(4)
Diameter of valve head:
Exhaust valve ........................ 1.646 + .005 in. (41.81 + 0.13 mm)
Intake valve ........................... 1.771 + .005 in. (44.98 + 0.13 mm)
(5)
Angle of intake valve face ....................................... 29-1/4 + 1/40
TA098806
Go on to Sheet 2
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