D353 INDUSTRIAL & MARINE ENGINES Caterpillar

start by:

a) remove pistons

1. Remove retaining rings (2) for the piston pin.

2. Remove piston pin and remove piston (1) from connecting rod (3).

3. Remove piston rings with tool (A).

Assemble Pistons

1. Install piston rings (1) with tool (A).

NOTE: The two compression rings have marks "UP-1N" and "UP-2M". The rings must be installed with the marks toward the top of the piston with "UP-1N" being the top ring. Put the ring gaps in place 120° from each other.

2. Put clean oil on the piston pin. Put the piston in place on the connecting rod. The "V" mark on piston must be on the same side of rod as bearing notches (2) in connecting rod. Install the piston pin and retaining rings.

end by:

a) install pistons