TM 5-4310-386-14
5-41. Valves.
This task covers:
a.
Adjust
b.
Replace
INITIAL SETUP
Tools
Equipment Condition
General Mechanic's Tool Kit
Compressor unit shut down (para. 2-13).
(NSN 5180-00-177-7033)
Cylinder head removed (para. 5-40).
Clamping Stand (PN 0030562)
Rocker arms and push rods removed (para. 5-38).
Clamping Plate (PN 0030794)
Push rods tubes removed (para. 5-39).
Valve Spring Compressor (PN 0030504)
Circlip pliers (NSN 5120-00-789-0492)
a.
Adjust.
figure 5-61)
(1) Turn crankshaft unit valves of cylinder are overlapping (exhaust valve about to close, inlet valve about to
open).
(2) Continue turning crankshaft through 360 degrees.
(3) Valve clearance (1) is correct when a 0.15 mm feeler gage can be inserted with a slight drag between
rocker arm (2) and valve (3). Failing this, the valve clearance must be adjusted.
(4) Loosen locknut (4) by two or three turns.
NOTE
Do not change the setting of oil nozzle (6) unless required. With hot engine idling, an oil flow to
pad of rocker arm (2) must be just noticeable. An excessive oil flow can lead to higher oil
consumption.
(5)
Adjust setscrew (5) so that when locknut (4) is retightened, the 0.15 mm feeler gage can be inserted and
withdrawn with slight drag.
5-172
