Inspecting Piston And Piston Ring - Echo CS-2510TES Service Manual

CS-2510TES
62
250Ts, 250TCs
ENGINE

8-7 Inspecting piston and piston ring

{Disassembling}
B
A
D
1. Inspect piston ring (A) and replace it if broken,
C
scored, or exceeded service limits (Refer to "1-5
Service limits").
2. Inspect piston crown (B). Clean with fi ne sand
paper, oil stone, and soft cleaning brush (C) if car-
bon is found.
3. Inspect top land (D), ring groove and skirt (E).
E
Clean them with soft cleaning brush (C), if carbon
is found.
NOTE: Do not use square end of broken piston
ring when cleaning piston ring groove, otherwise
piston ring groove might be damaged.
H
4. Remove snap rings (F) from both sides of piston
pin.
F
G
K
5. Push piston pin (G) out from piston (H).
J
NOTE: If piston pin is tight, use piston pin tool
897702-30131 (J) with adapter (K) stamped "8" on
an end.
6. Inspect piston pin, needle bearing and piston
pin spacers, and replace if wear or discoloration is
noted.
{Assembling}
M
7. Lubricate needle bearing (L) with 2-stroke oil.
8. Set needle bearing (L) and piston pin spacers (M)
on small end of connecting rod (N).
N
L
9. Place piston (H) over connecting rod (N).
M
H
N