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Doosan DX22 - Page 190

Doosan DX22
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12. Other/Driving System
184
4. Inspecting the journal and connecting rod bearings
EH6OM039
1) When assembling the bearing as shown in the figure,
check whether the bearing is sufficiently pliable and
requires a significant amount of finger pressure.
2) When measuring the spread of the journal bearing and
connecting rod bearing, use a dedicated jig as shown in
the figure. However, perform the measurement with the
parts assembled as shown below in order to facilitate the
task.
EDM2047I
3) Journal bearing
EDX22190059
a) Install the bearings and caps on the cylinder block and
tighten them to the specified torque; then, completely
remove the bolts on one side and use a feeler gauge to
measure the gap which naturally forms between the
cylinder block and bearing cap.
Bearing cap clearance
4) Connecting rod bearing
EA6M064I
a) Install the bearing and cap on the connecting rod and
tighten them to the specified torque; then, completely
unscrew one of the bolts and use a feeler gauge to
measure the gap which forms naturally between these
parts due to the bearing.
Connecting rod bearing clearance
Spread = Ø A – Ø B
Reference value
0.3 ~ 1.2 mm
(0.0118 ~ 0.0472 in.)
Reference value
0.5 ~ 1.4 mm
(0.0197 ~ 0.0551 in.)

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