TM 5-2420-230-24-2
Piston and Connecting Rod Assembly (001-054)
B3.9 and B5.9 Series Engines
Page 1-100
Section 1 - Cylinder Block - Group 01
Install the pin. Refer to Procedure 001-043.
however, the pistons do need to be at room temperature or
above.
Install the second retaining ring.
Piston Grading
When rebuilding an engine with the original cylinder block,
crankshaft, and pistons, make sure the pistons are installed
in the original cylinder.
If replacing the piston(s), make sure the replacement pis-
ton(s) are the same grade as the original piston.
If a new cylinder block or crankshaft is used, the piston
grading procedure must be performed to determine the
proper piston grade for each cylinder.
Install the connecting rod/piston assembly into the No. 1
cylinder without the rings installed.
NOTE: The connecting rod bearings must be installed in
the original connecting rod and cap.
Install the upper bearing shell in the connecting rod with
the tang of the bearing in the slot of the connecting rod.
Use clean lubricating oil to coat the inside diameter of the
connecting rod bearing shell.
L-778