Mitsubishi Fuso CANTER FE85DE6SLGP, Руководство по ремонту

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Inspection procedure
Inspection: Main bearing span when free
CAUTION
• Do not attempt to manually expand the bearings.
• If the measurement is less than the limit, replace upper and low-
er bearings as a set.
Inspection: Main bearing-to-crankshaft oil clearance
• Fit the upper bearing into the upper crankcase and the lower
bearing into the lower crankcase.
• Tighten the main bearing cap bolts to a torque of 49 N·m {5.0
kgf·m}.
• Measure the inside diameter of the main bearing and the diame-
ter of the corresponding crankshaft journal.
• If the difference between the measurements exceeds the speci-
fied limit, machine the crankshaft journal to one of the specified
undersize dimensions indicated on the next page.
Inspection: Crankshaft
(1) Bend
•
Support the crankshaft at its No. 1 journal and No. 5 journal.
Measure the extent of bending in the crankshaft at the center of
the No. 3 journal.
• The amount of crankshaft bend is obtained by giving the crank-
shaft one turn and dividing the dial gauge reading by two.
• If the measurement exceeds the specified limit, replace the
crankshaft.
(2) Out-of-roundness and taper of crankshaft journals and
pins
• If any of the measurements exceeds the specified limits, grind
the crankshaft journal(s) and/or pin(s) to undersize(s) or replace
the crankshaft.