Fiat Kobelco EX355 Tier2, Техническое руководство

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EX355 W5-3-91
ENGINE OVERHAUL
• Apply molybdenum disulfide grease to the two
piston skirts. This will facilitate smooth break-in
when the engine is first started after reassembly.
• Apply engine oil to the upper connecting rod
bearing.
• Apply engine oil to the cylinder wall.
• Position the front mark (
1 ) on the piston head so
that it is facing the front of the engine.
• Use a piston ring setting tool to compress the
piston rings.
SM7204
SM7205
• Use a hummer grip to push the piston in until the
connecting rod marks contact the crankpin.
As the same time, rotate the crankshaft until the
crankpin is-at bottom dead center.
CAUTION
Do not bend or damage the oil jet.
4. Install the connecting rod bearing.
Carefully wipe any oil or other foreign material
from the connecting rod bearing back faces and
the bearing fitting surfaces.
5. Install the connecting rod cap.
• Fit the lower connecting rod bearing to the
connecting rod cap.
• Apply engine oil to the circumference of each
piston ring, piston and crankpin.
• Position the piston ring gaps as shown in the
illustration.
Gap position
1. 1
st
compression ring
2. 2
nd
compression ring
3. 3
rd
compression ring
4. Oil ring
5. Coil expander
SM7203
Front mark