Kubota D650-B Handbuch Seite 178

CRANKSHAFT
o
C hecking Crankshaft Alignment
1) Place V blocks on the surface plate, and support the
journals at both ends of the crankshaft on the V blocks.
2) Set a dial gauge to the central journal.
3) Read the dial gauge while rotating the crankshaft slowly.
Crankshaft flexure is half of the reading.
4)
If
the reading exceeds the allowable limit, replace.
8
Checking Oil Clearance between Crankshaft
Journal and Crankshaft Bearing 1
1} Measure the crankshaft journal (on the side of the crank­
shaft bearing 1) with an outside micrometer.
2) Measure the crankshaft bearing 1 with an inside micro­
meter. Calculate the clearance.
3) If the clearance exceeds the allowable limit, replace the
crankshaft bearing 1.
0.034 to 0.106 mm
Reference value
0.0013 to 0.0042 in.
----1c--------
- - - - 1
0.2
mm
Allowable limit
0.079 in.
Crankshaft
journaIO.D.
Crankshaft
1 I.D.
43.934 to
1.7297 to 1.7303
43.984 to 44.040
1.7317 to 1.7339
8
Checking Oil Clearance between Crankshaft
Journals and Crankshaft Bearings 2
1) Paste a press gauge with grease on the crankshaft bearing_
2) Tighten the crankshaft bearing case onto the crankshaft
journal to the specified torque 20 to 24 Nm (2.0 to 2.4
kgf-m, 15 to 17 ft-Ibs).
3) Detach the bearing case slowly, and measure the depres­
sion of the press gauge with a sheet of gauge (paper)_
4) If the measurement exceeds the allowable limit, replace
the crankshaft bearing 2.
0.034 to 0.092 mm
Reference value
0.0013 to 0.0036 in.
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