9-TRANSMISSION ASSEMBLY
49
CHK
ADJ
NO.
PART NO.
PART NAME
QTY
CAUTION
1
1050468-001000 16×1 piston pin retaining ring
2
2
1050455-005000 ZT152MI Piston
1
3
1050468-002000 14×37×8.5 Piston pin
1
4
1050455-002000 52×0.8×2.05 first air ring
1
5
1050455-003000 52×0.8×2.1 second air ring
1
6
1050455-004000 52×1.5×1.9 oil ring combination
1
Fig6 TRANSMISSION
ASSEMBLY
Gear shifting and transmission mechanism
components-6
PROCEDURE:
●
Use needle-nose pliers or other sharp tools to pick out the piston pin retaining ring
⑴
, pull out the piston pin
⑶
, and remove the piston
⑵
from the crankshaft.
●
Find the gap of the first air ring
⑷
and remove it from the piston.
●
Find the gap of the second air ring
⑸
and remove it from the piston.
●
There are two oil ring scrapers and a liner ring in the oil ring assembly
⑹
, and take them out after finding the
gaps.
CAUTION:
●
Piston pin retaining ring
⑴
must be replaced after disassembly, because piston pin retaining ring
⑴
may
undergo plastic deformation during disassembly. If the piston pin retaining ring
⑴
falls off in the engine, it may
cause cylinder pulling in severe cases.
●
Piston pin(3), crankshaft and piston(2) are in clearance fit, and they can move with each other. If they become
stuck, they need to be replaced.
●
Be careful not to scratch the surface of the piston when disassembling the gas ring and oil ring combination.
●
Distinguish between the first air ring and the second air ring:
There is an "R" mark on the first air ring, and a "2R" mark on the second air ring. When the two are assembled,
the marked side faces up.
●
The gap between each ring must be staggered, as shown in Picture.
●
When installing the piston
⑵
into the cylinder block, the "IN" on the piston
⑵
faces the installation side of the
engine tensioner.
