Komatsu 4D98 Series Shop Manual page 72

4. Engine Body
l
Undersized bearing (0.25 mm)
Code No.
Standard thickness
(mm)
Upper Lower
4TNE94.98 12990d-02320 129900-02330 2.120-2.135
4TNE106 (T)
123900-02320 123900-02330 2.613-2.628
l
Journal bearing machining dimension
Journal bearing machining dimension (mm)
4TNE94.98 $64.702-64.712
4TNElO6 (T) @75.702-75.712
(1)
t-2)
[NOTICE]
If the oil clearance is excessive though the thicknesses of the journal and crankpin
metals are normal or if partial uneven wear is observed, regrind the crankshaft and
use an oversized metals.
If rust or surface roughening exists on the rear side of the metals, coat it with blue
or minimum. Then assemble the crankpin metal to the connecting rod, and tighten
the rod bolt to the specified torque to check the metal for contact. If the contact
surface occupies 75% or more, the metal is normal. If the contact surface is insuf-
ficient, the metal interference is insufficient. Replace the metal with
a
new one.
(5.3)
Thrust metal inspection
Inspect any damage or wear.
@ Thickness
l
Thrust metal thickness
ai
If the side gap is exceeded, use an oversized thrust metal.
l
Oversized metal (0.25 mm)
4TNE94.98
4TNE106 (T)
Code No.
Upper
Lower
129900-02370 129900-02360
123900-02370 123900-02360
Standard thickness (mm)
2.055-2.105
2.555-2.605
4-24