TM 9-4310-397-14
Table 4-1. Preventive Maintenance checks and Services for 16MS125 - Continued
Location
Item No.
Interval
Procedure
Not Fully Mission Capable If:
Item to
Check/Service
18 -
c. Remove six hex washer head
Cont
bolts (89), valve cover (88), and o-
ring (gasket) (90). Discard o-ring
(gasket).
d. Using engine rotation tool, rotate
engine flywheel in running
direction (clockwise viewed from
water pump) until number one
cylinder (front) reaches top dead
center on the compression stroke.
Valve springs (91) should not be
compressed by rocker arm (92)
when cylinder is in the proper
position.
e. Turn adjustment screw (93) to set
the clearance gap (94) to the
following:
• Cylinders, number one and two
exhaust valves, 0.018 in. (0.45
mm).
• Cylinders, number one and three
intake valves, 0.014 in. (0.35 mm).
f. Using engine rotation tool, rotate
engine flywheel in running
direction (clockwise viewed from
water pump) 360°
.
g. Turn adjustment screw (93) to set
the clearance gap (94) to the
following:
• Cylinder number three exhaust
valve 0.018 in. (0.45 mm).
•· Cylinder number two intake
valve 0.014 in. (0.35 mm).
h. Install new o-ring (gasket) (90)
(item 6, section IV, chapter 4),
valve cover (88), and six hex
washer head screws (89). Tighten
screw to 96 in. lb (10.8 Nm) torque.
4-34
