Kubota Z400-B Handbuch Seite 183

Oil Clearance between Crankshaft Journal and
Beari~1_
1. Measure the I.D. of the crankshaft bearing 1 with an
inside micrometer.
2. Measure the O. D. of the crankshaft front journal with an
outside micrometer.
3. If the oil clearance exceeds the allowable limit, replace the
crankshaft bearing
1.
4. If the same size bearing is useless because of the crank­
shaft journal wear, replace it with an undersize one refer­
ring to the table and the figure.
• IMPORTANT:
• Install the bearing using a replacing tool (see page S-591,
so that its seam directs toward the exhaust side in the
crankcase (See figure).
Oil clearance
Factory
specif icat ion
Allowable
limit
0.034 to 0.106 mm
0.00134 to 0.00417 in.
0.20 mm
0.0079 in.
Crankshaft
bearing 1.0.
Factory
specification
!
39.984 to 40.040 mm
1.57418to 1.57638 in.
I.
Cran kshaft
journal 0.0.
....
~---.--
...
Facotry
I
specification
~
..
39.934 to 39.950 mm
1.57221 to 1.57284 in .
( Reference)
• Undersize bearings:
• Undersize dimensions of crankshaft:
Dimension
(A) Oil hole 5 mm (0.2 in.) dia.
(8)
0.2 mm Undersize 39.734 to 39.750 mm
(1.56433 to 1.56496 in.)
OA
mm Undersize 39.534 to 39.550 mm
(1.55646 to 1.55709 in.)
(C) 1.8 to 2.2 mm (0.071 to 0.087 in.) R
• Finely finish the contact face to the bearing, to higher
than
V\1VV
(OAS).
• Chamfer the oil hole with an oilstone.
Undersize
Bearing Code Number Marking
0.2mm Bearing 1 02 15841-23911 020 US
040 US
0.4mm
~
Bearing 1 04
15841·23921
Seam
Joint
S-101
I