Fiat Kobelco EX355 Tier2, Technical Manual

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W5-3-94 EX355
ENGINE OVERHAUL
1. Remove the cylinder head assembly.
Refer to “Cylinder Head Removal” in this manual.
2. Remove the oil pan.
Refer to “Oil Pan Removal” in this manual.
3. Remove the flywheel housing .
Refer to “Flywheel Housing Removal” in this
manual.
4. Remove the crank pulley.
Refer to “Crank Pulley Removal” in this manual.
5. Remove the front cover.
Refer to “Front Cover Removal” in this manual.
6. Remove the timing gears.
Refer to ‘Timing Gear Removal “ in this manual.
7. Remove to the piston with the connecting rod.
Refer to “Piston Removal “ in this manual.
8. Measure the crankshaft end play at No. 7 crank-
shaft journal before removing the crankshaft
thrust bearing.
Crankshaft end play
Standard: 0.04 - 0.205 mm (0.0016 - 0. 81 in)
Limit: 0.54 mm (0. 021 in)
If the measured value exceeds the specified limit,
the crankshaft thrust bearing must be replaced.
9. Remove the crankcase.
1. Loosen the crankcase bolts (M14/14 pieces)
a little at a time in the numerical order shown
in the illustration.
2. Loosen the crankcase bolts (M10/25 pieces)
evenly from outside to inside.
3. Screw M10 bolts (crankcase bolts) into the
four thread holes (marked with asterisks) and
tighten them evenly. Separate the crankcase
from the cylinder block.
4. Remove the thrust bearing.
Clean the crankcase surfaces and remove
the sealant residue.
10. Remove the crankshaft from the cylinder block.
11. Remove the upper crankshaft bearings.
• Keep the crankshaft bearings in order for in-
stallation to their original position.
• Clean the cylinder block surfaces and bores.
Remove the sealant residue and carbon de-
posits.
• Use compressed air to thoroughly clean the
inside and outside surfaces of the cylinder
block, the oil holes, and the water jackets.
SM7224
SM7225
SM7226