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TM 10-4320-351-14
6.4.13 Install Cylinder Head.
This procedure applies to either or both cylinder heads.
This task consists of:
a. Adjustment
b. Installation
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Torque Wrench, 50 ft. lb. capacity
Gasket (Appendix I, Item 20)
(Appendix B, Section III, Item 3)
O-Ring (Appendix I, Item 26)
Socket, Socket Wrench, Deep Well, 13 mm
(Appendix B, Section III, Item 3)
Handle, Socket Wrench, Ratchet
(Appendix B, Section III, Item 3)
Equipment Condition:
Straight Edge
Cylinder head assembled (para. 6.4.12)
(Appendix B, Section III, Item 3)
Timing cover installed (6.4.10)
Depth Micrometer
Piston protrusion checked (para. 6.4.11)
(Appendix B, Section III, Item 3)
Refer to figure 6-37.
a.
Clean each pushrod (1). Ensure lubrication passages in pushrods are clean and clear.
b.
Measure overall length of pushrod (2). Using a depth micrometer, measure depth of pushrod cup (3). Subtract
cup depth from overall length. The result should be 6.362-6.386 in. (161.6-162.2 mm). If measurement is out of
tolerance, replace pushrod.
c.
While holding cylinder in place, slowly turn engine crankshaft to position piston at Top Dead Center (TDC).
d.
Clean carbon, dirt and other foreign material from piston surface. Remove any remaining gasket materials.
Refer to figure 6-38.
e.
Insert the same number of copper washers (1) in fuel injector port as were removed from cylinder head (2).
f.
Temporarily secure fuel injector in cylinder head by installing injector (3), brace (4), flat washer (5) and nut (6) on
stud (7). Tighten nut.
g.
Using a depth gauge (8), measure protrusion of fuel injector tip (9) into combustion chamber (10) of cylinder head.
Protrusion should be 0.069-0.088 in. (1.75-2.25 mm). If adjustment is required, remove the fuel injector and
remove or add new copper washer(s) (1) to adjust the tip protrusion.
h.
Remove fuel injector (3), brace (4), flat washer (5) and nut (6) after protrusion check is completed.
Refer to figure 6-39.
i.
Install new O-rings (1) on the pushrod pipes (2) and insert pipes in crankcase. Insert pushrods (3) in same pipes
they were removed from.
6-60
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