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 TM 55-1905-220-14-7
CHAPTER 3 (Continued)
SECTION V. MAINTENANCE PROCEDURES (Cont)
3-171. PISTONS, CONNECTING RODS, AND CYLINDER LINERS.
The following is an index to the piston connecting rods and cylinder liner maintenance instructions:
DESCRIPTION
PARAGRAPH
Piston
Connecting Rods
Connecting Rod Bearings
Cylinder Liner
3-171.1. PISTON - MAINTENANCE INSTRUCTIONS.
a. The trunk-type malleable iron piston is plated with a protective coating of tin which permits close fitting,
reduces scuffing and prolongs piston life. The top of the piston forms the combustion chamber bowl and is
designed to compress the air into close proximity to the fuel spray.
b. Each piston is internally braced with fin-shaped ribs and circular struts, scientifically designed to draw
heat rapidly from the piston crown and transfer it to the lubricating oil spray to ensure better control of piston
ring temperature.
3-2875
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