Kubota Z400-B Handbuch Seite 185

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Oil Clearance between Crankshaft Journal and
-Seanngs2and 3
1. Put a strip of Plastigage lengthwise in the center of the
journal.
2. Install the bearing cap and tighten the screws to the
specified torque, and remove the bearing cap.
3. Measure the amount of the flattening with the scale and
get the oil clearance.
4. If the oil clearance exceeds the allowable limit, replace the
crankshaft bearing.
5. If the same size bearing is useless because of the crank·
shaft journal wear, replace it with an undersize one re ­
ferring to the table and the figure.
Rear
rSearing 2 Factory
A
~O~.
_ _ _ _
+--~specification
Crankshaft Factory
journal 0.0. specification
Intermediate
!
Bearing 3 Factory
11.8to 14.7 N-m
Tightening torque Beari ng cap screw 1.2 to 1.5 kgf'm
8.7 to 10.8 ft·lbs
Factory 0.034 to 0.092 mm
Oil clea rance
specification 0.00134 to 0.00417 in.
Allowable
limit
0.20 mm
0.0079 in.
I
43.984 to 44.026 mm
1.73166 to 1.73331 in.
I
43.934 to 43.950 mm
1.72969 to 1.73032 in.
J
39.984 to 40.026 mm
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f--~sp~ec~if~ic~at
__ __ __
i.o~n_+_~1~.~57--4~1~8~t-o~1~.5~7_5
8_3_in_'_-'1
'
Crankshaft Factory 39.934 to 39.950 mm
I
L -__
~io_u_rn_a_10_.0_._~~sp_e~c_if_ic_at_io_n_~_1._5_72_2_1_t_o_l_.5_7_2_8_4_i_n.
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(Reference)
• Undersize bearings:
I
Marking
i
Undersize
I
Bearil1!L.......
I
Code Number
Bearing 2 02 15261-23931
020 US
1------­
Bearing 302 15841·23861
020 US
i
I Bearing 2 04 15261·23941 040 US
0.4mm
Bearing 304 15841-23871
040 US I
I
._­
• Undersize dimensions of crankshaft:
Dimension
(A) Oil hole 3 mm 10.12 in.) dia.
(8) 1.8 to 2.2 mm (0.071 to 0.087 in.) R
Ie)
0.2 mm Undersize 39.734 to 39.750 mm
(1.56433 to 1.56496 in.)
0.4 mm Undersize 39.534 to 39.550 mm
(1.55646 to 1.55709 in.)
(0)
0.2 mm Undersize 43.734 to 43.750 mm
(1.72181 to 1.72244 in.)
0.4 mm Undersize 43.534 to 43.550 mm
(1.71394to 1.71457 in.)
• Finely finish the contact face to the bearing, to higher
than VVVV (O.4S)
S-103