wsm ME8200, Workshop Manual

Page: 145 / 543

1-S43
ME8200, ME9000, WSM ENGINE
Piston Ring and Connecting Rod
1. Remove the piston rings using a piston ring tool.
2. Put the fan shaped concave (8) on the piston as shown in figure.
3. Remove the piston pin (1), and separate the connecting rod (7)
from the piston (2).
(When reassembling)
• Be sure to fix the crankpin bearing and the connecting rod are
same I.D. colors.
• When installing the ring, assemble the rings so that the
manufacture's mark (12) near the gap faces the top of the piston.
• When installing the oil ring onto the piston, place the expander
joint (10) on the opposite side of the oil ring gap (11).
• Apply engine oil to the piston pin.
• When installing the piston pin, immerse the piston in 80 °C (176
°F) oil for 10 to 15 minutes and insert the piston pin to the piston.
• Assemble the piston to the connecting rod with the aligning the
direction of the fan shaped concave (8) of piston head and the
mark (9) of connecting rod.
• The end faces of the oil ring are plated with hard chrome. In
putting the piston into the cylinder, be careful not to get the oil ring
scratched by the cylinder. Use the piston ring fitter to tighten up
the oil ring. If the ring's planting is scratched, it may get stuck on
the cylinder wall, causing a serious trouble.
IMPORTANT
■
• Mark the same number on the connecting rod and the piston
so as not to change the combination.
W1031143
(1) Piston Pin
(2) Piston
(3) Piston Pin Snap Ring
(4) Compression Ring 1
(5) Compression Ring 2
(6) Oil Ring
(7) Connecting Rod
(8) Fan-Shaped Concave
(9) Mark (10) Expander Joint
(11) Oil Ring Gap
(12) Manufacture’s Mark
(A) Connecting Rod I.D. Color : Blue
or Yellow (without color)
(B) Crankpin Bearing I.D. Color : Blue
or Yellow (without color)
KiSC issued 03, 2007 A