Komatsu 4D98 Series Shop Manual page 109

8. Turbocharger (for 4TNE106T)
(2.8) Bearing housing 15
@ Inspect the housing for cast surface
exfoliation due to oxidation and deg-
radation, dent or crack.
Replace with a new one if defective.
@ Inspect circlip 16 for chipping or
crack, and replace with a new one if
defective.
@ Measure the (B) and (F) portions of
the bearing housing shown in the
figure below.
Replace with a new one if either
wear limit is exceeded.
Bearing fitting ring
Bearing housing inside diameter (B)
Wear limit : 12.42 mm
Turbine side seal ring inserting
portion (F)
Wear limit : 15.05 mm
Compressor
side
(2.9) Seal plate 4
@
Inspect the seal plate for any contact trace, joint surface
defect, dent or crack.
Replace it if defective.
@ Measure the seal ring inserting dimensions (Hl and H2)
on the compressor side, and replace the seal ring with a
new one if either wear limit is exceeded.
Wear limits : Hl : 12.45 mm
H2 : 10.05 mm
Seal
plate
Ii
2
(2.10) Seal rings
Replace seal rings with new ones.
(2.11.) Inspect keep plates 10, 13 and bolts for any deformation, and replace defective parts with
new ones. Also replace M3 Ton: machine screws with new ones.
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