Page 614 - Foton Workshop Manual - Auman EST-M

EG - 98 Engine section – Engine (Cummins ISF3.8)

e. Measure and record the diameter of the connecting rod
journal on the crankshaft.
Diameter of journal of connecting rod of standard
crankshaft
Minimum: 68.962mm Maximum: 69.013mm
Crankshaft connecting rod journal diameter a bit
smaller
Reduce 0.25 in dimension
Minimum: 68.712mm Maximum: 68.763mm
Reduce 0.50mm in dimension
Minimum: 68.462mm Maximum: 68.513mm
Caution
If the crankshaft connecting rod journal does not
meeting the known technical specification, it must be
re-grounded. Machine the crankshaft to the minimum
specification of targeted minimum dimension bearing.
Then polish the crankshaft and machine it till the
nominal value of bearing. If one axle journal does not
meet the technical specifications, all the axle journals
need to be grounded
Measure the diameter of the hole of the crankshaft of the
connecting rod and calculate the clearance from the
connecting rod to the crankshaft bearing.
Clearance from connecting rod to crankshaft bearing
Minimum: 0.04mm Maximum: 0.12mm

f. Test the main journal of the crankshaft.
Crankshaft main journal
Minimum: 82.962mm Maximum: 82.763mm
Crankshaft connecting rod journal diameter a bit
smaller
Reduce 0.25 in dimension
Minimum: 82.712mm Maximum: 68.763mm
Reduce 0.50mm in dimension
Minimum: 82.462mm Maximum: 82.513mm
Caution

If the crankshaft connecting rod journal does not
meeting the known technical specification, it must be
re-grounded. Machine the crankshaft to the minimum
specification of targeted minimum dimension bearing.
Then polish the crankshaft and machine it till the
nominal value of bearing.

g. Measure the main bearing bore with the bearing and
calculate the clearance between the main bearing and the
crankshaft journal.
Gap between the main bearing hole and crankshaft
bearing
Minimum: 0.04mm
Maximum: 0.12mm

EG-098