Nothing the direction of the piston, make the longer
side(machined with key groove on the bearing) of the
connecting rod big end.
On the piston head surface, the longer side
connecting rod big end is in opposite direction from the
valve seating surface as well as in the same direction
with the narrow margin of the combustion chamber.
Install the snap rings and check to see that it is
securely assembled.
Install the piston ring in the piston using piston ring
pliers.
Identify the mark ―Y‖ or ―TOP‖ on the ring end to
prevent the top and bottom of the piston ring from being
interchanged and make the marked portion face upward.
(The surface marked as ―Y‖ is upper surface.)
Adjust the angle among individual piston ring gaps to
90° and fit a piston assembling jig onto the piston, Use
care not to match the ring gaps with the pin direction.
Install the bearing by aligning it with the connecting
rod key groove and apply oil to the bearing and piston.
SPC000006 5ton Diesel Engine
Page 70
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