Fiat Kobelco EX355 Tier2, Technical Manual

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W5-3-90 EX355
ENGINE OVERHAUL
• Apply engine oil to the piston pin.
• Insert the piston pin to the connecting rod
through the piston pin hole in the piston.
• Install the snap ring.
3. Install the piston ring.
• Apply engine oil to the piston rings.
• Install the compression rings with the stamped
side facing up.
• Use the piston ring setting tool 1-85221-029-0 to
reassemble the four piston rings according to
the top mark on the piston ring.
The oil ring does not have a top mark.
NOTE: Insert the expander coil into the oil ring groove
so that there is no gap on either side of the expander
coil before installing the oil ring.
SM7209
SM7222
SM7208
The grade mark is stamped on the top of the piston
installed at the factory, but service part pistons do not
have any grade (single grade).
Piston outside diameter
Standard: 114.894 - 114.909 mm
(4.5233 - 4.5240 in.)
Piston and Liner bore clearance
Standard: 0.122 - 0.156 mm (0.0048 - 0.0061 in.)
If the piston and liner clearance exceeds the standard
value, the piston and/or liner must be replaced.
CAUTION
Cylinder liner kit clearances are preset. However,
the cylinder liner installation procedure may result
in slight decreases in cylinder liner clearances.
Always measure the cylinder liner clearance after
installation to be sure that its is correct.
Reassembly
1. Install the snap ring ( 1 ).
Use a pair of snap ring pliers to reassemble the
snap ring to the piston.
2. Install the connecting rod and piston pin.
• Clamp the connecting rod in a vise. Take care
not to damage the connecting rod.
• Install the piston so that the piston head front
mark and the connecting rod front mark face the
opposite direction.
• Check that the piston rings rotate smoothly in the
piston ring grooves.