Yanmar 3TNV Series Service Manual page 120

(d) Rod big end measurement
Measure the crankpin and bushing according to
4.4.5.(2)(c) described above.
Calculate the oil clearance of a crank pin metal and a
crank pin from the measured values of the crank pin
metal inner diameter and the crank pin outside
diameter.
Replace a crank pin metal if the oil clearance becomes
about the limit dimension of the below table.
Correct by grinding if unevenly wear, roundness
exceeding the limit or insufficient outside diameter is
found. Also use an undersized metal. (Refer to the
above (2) c.)
[NOTICE]
When measuring the inside diameter of the rod big
end, install the crankpin metals in the rod big end
not to mistake the top and bottom of the metals and
tighten the rod bolts by the standard torque.
Tightening torque of rod bolt
Tightening torque
Model
37.2 41.2
3TNV82A
(3.8 4.2)
44.1 49.0
TNV84/88
(4.5 5.0)
53.9 58.8
4TNV94L/98
(5.5 6.0)
78.5 83.4
4TNV106(T)
(8..0 8.5)
Standard of rod big end
Model
Rod I.D. bushing
Crankpin O.D.
3TNV82A
Metal thickness
Clearance
Rod I.D. bushing
Crankpin O.D.
TNV84/88
Metal thickness
Clearance
Rod I.D. bushing
Crankpin O.D.
4TNV94L/98
Metal thickness
Clearance
Rod I.D. bushing
Crankpin O.D.
4TNV106(T)
Metal thickness
Clearance
Lubricating oil application
Nm(kgf-m) (threaded portion, and bearing seat surface)
Item Standard
42.952 42.962
43.000 43.042
1.487 1.500
0.038 0.090
47.952 47.962
48.000 48.026
1.492 1.500
0.038 0.074
57.952 57.962
58.000 58.026
1.492 1.500
0.038 0.074
63.952 63.962
64.016 64.042
1.984 1.992
0.054 0.090
4. Disassembly, Inspection and Reassembly of Engines
Lube. oil applied
Limit
42.902
-
-
0.150
47.902
-
-
0.150
57.902
-
-
0.150
63.902
-
-
0.150
105
mm