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TM 10-4320-351-14
6.4.6 Install Piston Assembly and Cylinder. (Refer to figure 6-28.)
This task consists of:
a. Removal
b. Installation
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Snap Ring Pliers (or Needle Nose)
Bearings (Appendix I, Item 14)
(Appendix B, Section III, Item 3)
Gasket (Appendix I, Item 24)
Socket, Socket Wrench, 14 mm
(Appendix B, Section III, Item 3)
Torque Wrench, 50 ft. lb. capacity
(Appendix B, Section III, Item 3)
Equipment Condition:
Crankshaft installed (para. 6.4.1)
Piston rings installed (para. 6.4.4)
Cylinder checked (para. 6.4.5)
NOTE
The cylinder is off-set. Ensure cylinder (1) is correctly positioned inside cylinder
studs (2).
a.
Turn flywheel so that crankshaft journal (3) for cylinder being installed is at TDC.
b.
Insert connecting rod (4) in piston (5). Install piston pin (6) through piston (5) and connecting rod (4). Install the
two snap rings (7) to hold piston pin (6) in place.
NOTE
When installing piston, combustion chamber recess must be positioned toward
injector side of engine. Bottom end of cylinders are chamfered for easier piston
ring installation.
c.
Insert piston assembly (4 thru 7) up into bottom end of cylinder (1) until piston rings have passed into cylinder,
d.
Install cylinder gasket (8). Set cylinder (1) in crankcase (9). Press cylinder (1) into crankcase (9).
e.
Align and install new bearing half (10).
NOTE
Bearing halves (10) are keyed together one way. Connecting rod (4) and rod cap
(11) are also keyed together one way.
f.
Install new bearing half (10) on rod cap (11).
g.
Position connecting rod (4) around crank shaft journal (3). Insert and start cap screws (12) in rod cap (11).
h.
Install and torque cap screws (12) to 26 to 30 ft. lbs. (35-41 Nm).
6-46
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