Yanmar 4TNE98, Service Manual, Page: 122 / 246

4TNV98 & 4TNE98 Diesel Engine Section 3. Engine 120
Figure 6-105
IMPORTANT
Do not rotate the crankshaft when using
PLASTIGAGE. A false reading may result.
(c) Reinstall bearing caps and tighten to
specification. See Special Torque Chart on page
69.
(d) Remove bearing caps.
(e) Compare the width of the flattened
PLASTIGAGE to the graduation marks on the
package
(Figure 6-106, (1)) . The mark that most
closely matches the width of the flattened
PLASTIGAGE will indicate the bearing oil
clearance.
Figure 6-106
6. Remove the crankshaft from the engine.
7. Remove the bearing inserts (Figure 6-104, (1))
and thrust bearings (Figure 6-104, (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
6-107, (1)) , parallel pin (Figure 6-107, (2)) and
key (Figure 6-107, (3)) .
If using a gear puller, be careful not to damage the
threads in the end of the crankshaft.
Figure 6-107
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.
Replacement of Crankshaft Oil Seals
1. Remove the seal (Figure 6-108, (2)) from the
cover (Figure 6-108, (1)) .