Maintenance instruction for sunray hfc4da1-2c china-IV diesel engines
34
s.
Measure the outside diameter of connecting rod journal
and the inside diameter of bush bore of connecting rod
fitted with bush.
Calculate the clearance between main journal of crankshaft
and the main bush bore of crankshaft: The difference
between the diameter of main journal and the inside
diameter of crankshaft main bush bore measured above is
the fitting clearance. The wear limit shall not exceed
0.11mm.
Notice: While measuring the inside diameter of
crankshaft main bush bore, install the bearing cap and
bush onto the bearing block and tighten the bolts to
specified torque. Use an inside multimeter to measure
the inside diameter.
Calculate the clearance between crankshaft connecting rod
journal and connecting rod bush bore: The difference
between the diameter of connecting rod journal and the
inside diameter of connecting rod bush bore measured
above is the fitting clearance. The wear limit shall not
exceed 0.10mm.