Yanmar 3JH4BE - Cylinder Block

13. SERVICE STANDARDS
194
13.2.3 Cylinder block
(1) Cylinder block
(2) Crankshaft
(3) Thrust bearing
(4) Piston and ring
1) Piston
mm
Inspection item Standard Limit Reference page
Cylinder inside diameter 88.000-88.030 88.200
5.1.5
Cylinder bore
Roundness
0.01 or less 0.03
Inclination
mm
Inspection item Standard Limit Reference page
Bending (1/2 the dial gauge reading) - 0.02 5.5.1(2)
Crank pin
Pin outside diameter 47.952-47.962 47.902
5.4.2(2)
5.5.1(3)
5.5.2(2)
Metal inside diameter 48.000-48.026 -
Metal thickness 1.492-1.500 -
Clearance 0.038-0.074 0.150
Crank journal
(Selective pairing)
Journal outside diameter 49.952-49.962 49.902
Metal inside diameter 51.000-51.010 -
Metal thickness 1.995-2.010 -
Clearance 0.038-0.068 0.150
mm
Inspection item Standard Limit Reference page
Crankshaft side gap 0.14-0.22 0.30 5.5.1(4)
mm
Inspection item Standard Limit Reference page
Piston outside diameter
(Measure in the direction vertical to the piston pin.)
87.950-87.960 87.900
5.3.1(1)
Piston diameter measure position
(Upward from the bottom end of the piston)
22 -
Hole inside diameter 26.000-26.009 26.020
5.3.2Pin outside diameter 25.995-26.000 25.900
Clearance 0-0.014 0.074