Doosan D35S-5 Service Manual page 82

Connecting Rod Bearing
1. Before removing the connecting rod cap, measure
the connecting rod endplay. If the gap exceeds
the reference, replace the connecting rod.
Connecting rod endplay
Reference : 0.15 ~ 0.45 mm
Limit : 0.6 mm
2. Measure the oil gap of the connecting rod bearing.
1) Remove the connecting rod cap.
2) Measure the oil gap of the connecting rod
bearing.
a. Remove the oil or foreign materials from pin
journal and connecting rod bearing surface.
b. Place the plastic gauge on the shaft of pin
journal along with its direction.
c. Install the connecting rod bearing cap and
fasten the bolt.
Tightening torque : 29.4 Nm + 90°
(3.0kgf.m + 90°, Ib-ft + 90°)
D439E Service Manual
d. Remove the connecting rod bearing cap and
measure the oil gap at each pin journal.
Connecting rod oil gap
Reference : 0.040 ~ 0.099 mm
Limit : 0.2 mm
e. If the oil gap is excessively large, replace the
connecting rod bearing.
3. Length of the connecting rod bearing.
Length of the connecting rod bearing (1) is
measured at the free state. If the measurement is
below the limit, replace the upper and lower
bearing.
Length of the connecting rod bearing
Limit : above 69.5 mm
Bearing should not be artificially expanded to
reuse.
80 2. Engine Mechanical System (D439E)
CAUTION