Yanmar 3TNV88C - Crankshaft and Piston Specifications; Crankshaft

ENGINE
TNV Tier 4 Service Manual
6-9
Crankshaft and Piston Specifications
CRANKSHAFT AND PISTON SPECIFICATIONS
Crankshaft
Note: Check appropriate parts catalog for various sizes of replacement main bearing inserts.
Inspection item Standard Limit
Reference
page
Bend (1/2 the dial gauge reading) –
0.0008 in.
(0.02 mm)
See Inspection
of crankshaft on
page 6-55.
Connecting rod
journals
3TNV88C,
3TNV86CT,
4TNV88C,
4TNV86CT
Journal outside diameter
1.8879 - 1.8883 in.
(47.952 - 47.962 mm)
1.8859 in.
(47.902 mm)
Bearing inside diameter
1.8898 - 1.8909 in.
(48.000 - 48.026 mm)
–
Bearing insert thickness
0.0587 - 0.0591 in.
(1.492 - 1.500 mm)
–
Oil clearance
0.0015 - 0.0029 in.
(0.038 - 0.074 mm)
0.0059 in.
(0.150 mm)
4TNV98C,
4TNV98CT
Journal outside diameter
2.2816 - 2.2820 in.
(57.952 - 57.962 mm)
2.2796 in.
(57.902 mm)
Bearing inside diameter
2.2835 - 2.2845 in.
(58.000 - 58.026 mm)
–
Bearing insert thickness
0.0587 - 0.0591 in.
(1.492 - 1.500 mm)
–
Oil clearance
0.0015 - 0.0029 in.
(0.038 - 0.074 mm)
0.0059 in.
(0.150 mm)
Main bearing
journal
3TNV88C,
3TNV86CT,
4TNV88C,
4TNV86CT
Journal outside diameter
1.9666 -1.9670 in.
(49.952 - 49.962 mm)
1.9646 in.
(49.902 mm)
See Inspection
of crankshaft on
page 6-55.
Bearing inside diameter
1.9685 - 1.9693 in.
(50.000 - 50.020 mm)
–
Bearing insert thickness
0.0785 - 0.0791 in.
(1.995 - 2.010 mm)
–
Oil clearance
0.0015 - 0.0027 in.
(0.038 - 0.068 mm)
0.0059 in.
(0.150 mm)
4TNV98C,
4TNV98CT
Journal outside diameter
2.5572 - 2.5576 in.
(64.952 - 64.962 mm)
2.5552 in.
(64.902 mm)
Bearing inside diameter
2.5590 - 2.5598 in.
(65.000 - 65.020 mm)
–
Bearing insert thickness
0.0785 - 0.0791 in.
(1.995 - 2.010 mm)
–
Oil clearance
0.0015 - 0.0027 in.
(0.038 - 0.068 mm)
0.0059 in.
(0.150 mm)
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