ENGINE
TM 5-3805-263-14&P-2
PISTONS
DISASSEMBLY AND ASSEMBLY
ASSEMBLE PISTONS
Tools Needed
A
7S9470
Ring Expander
1
1.
2.
3.
4.
5.
Install the connecting rod (4) in the piston with
the bearing tab groove (slot) (1) on the same
side as the cutout (depression) (3) on the head
of the piston.
Install piston pin (2) and retaining rings (5) in
piston.
When old pistons are to be used, clean the
piston grooves with an acceptable piston groove
cleaning tool.
Install the spring for the oil ring. Install the oil
ring with tool (A). The gap in the ring must be
approximately 180° from the oil ring spring
connections.
The two compression rings have marks “UP-1”
and "UP-2". The rings must be installed with
these marks toward the top of the piston with
"UP-1" as the top ring. After installation of all
three piston rings, put piston rings in position
so gaps in rings are 120° apart.
NOTE: Compression rings that do not have identifi-
cation can be installed either way.
6. To check the clearance between the piston ring
grooves and rings, see SPECIFICATIONS.
7. See SPECIFICATIONS to check the clear-
ance between the ends of the piston rings (end
gap).
end by:
a) install pistons
1-210
