Yanmar 3JH4E Service Manual page 130

5. Inspection and Servicing of Basic Engine Parts
(4) Checking the side gap of a crankshaft
After assembling the crankshaft, tighten the main
bearing cap to the specified toque, and move the
crankshaft to one side, placing a dial gauge on one end
of the shaft to measure thrust clearance.
Replace the thrust bearing if it is worn beyond the limit.
mm
Standard Limit
Crankshaft side gap 0.14-0.22 0.30
(Side gap measurement 1)
Other measurement method can also be effective.
Insert the thickness gauge directly into the clearance
Cylinder block
between the thrust metal and crankshaft thrust face.
Crankshaft
Standard
width
Thrust metal
Thrust
face
Bearing cap
Thickness gauge
(Side gap measurement 2)
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