Yanmar 3TNV88F - Inspection of Crankshaft and Camshaft Components

ENGINE
6-40
3TNV88F Service Manual
Crankshaft and Camshaft Components
5. Measure bearing oil clearance prior to removing
the crankshaft to determine extent of wear.
Record the measurements.
1- Wipe oil from the bearing insert and
crankshaft journal surfaces.
2- Place a piece of PLASTIGAGE
(Figure 6-60, (1)) along the full width of
each bearing insert.
Figure 6-60
NOTICE
Do not rotate the crankshaft when using
PLASTIGAGE. A false reading may result.
3- Reinstall bearing caps and tighten to
specification. See Special Torque Chart on
page 6-10.
4- Remove bearing caps.
5- Compare the width of the flattened
PLASTIGAGE to the graduation marks on
the package (Figure 6-61, (1)). The mark
that most closely matches the width of the
flattened PLASTIGAGE will indicate the
bearing oil clearance.
Figure 6-61
6. Remove the crankshaft from the engine.
7. Remove the bearing inserts (Figure 6-59, (1))
and thrust bearings (Figure 6-59, (2)).
Note: Do not remove the crankshaft gear
unless the gear or crankshaft are
damaged and require replacement.
8. If necessary, remove the crankshaft gear
(Figure 6-62, (1)), parallel pin
(Figure 6-62, (2)) and key (Figure 6-62, (3)). If
using a gear puller, be careful not to damage
the threads in the end of the crankshaft.
Figure 6-62
Inspection of Crankshaft and
Camshaft Components
WARNING
Fume/Burn Hazard!
• Always read and
follow safety related
precautions found on
containers of
hazardous substances
like parts cleaners,
primers, sealants and
sealant removers.
• Failure to comply could result in death or
serious injury.
Thoroughly clean all components using a brush
and appropriate solvent. Each part must be free of
carbon, gasket material, metal filings and other
debris.
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K0001899
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K0001731A
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