TM 5-1940-321-13&P
( 19 ) Apply a light coating of grease to the spring and spring washer.
( 20 ) Insert the male valve portion into the female portion verifying that the indicating
arrow on the flywheel is at the 6 o clock position. Rotate the flywheel.
Operation of the flywheel must be smooth. If operation of the flywheel indicates
grit is present, disassemble and reclean. Any grit present will result in grooving
of the mating surfaces and will cause air leaks.
( 21 ) Return indicating arrow on valve flywheel to the 6 o clock position.
( 22 ) Install valve spring washer and valve spring by first slipping them over a
screwdriver as shown in figure 5-10. Then ease the spring and washer into
position on the valve stud.
Figure 5-10. Valve Spring Washer and Spring Slipped over Screwdriver before Installing in Valve.
( 23 ) Install the locknut and tighten until snug using the 10 mm deep socket nut
driver. It is necessary to apply downward force against the spring while
installing the locknut. Loosen the locknut by unscrewing counterclockwise
exactly five complete turns. (This operation sets the intercommunicating valve
overpressure release to approximately 700-750 mb (10.2 TO 10.9 psi).
5-22