Kubota L4400 Workshop Manual page 134

L4400 , WSM
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 1
1. Measure the O.D. of the crankshaft journal with an outside
micrometer.
2. Measure the I.D. of the crankshaft bearing 1 with an inside
micrometer, and calculate oil clearance.
3. If the clearance exceeds the allowable limit, replace the
crankshaft bearing 1.
4. If the same size bearing is ineffective because of the crankshaft
journal wear, replace it with an undersize one referring to the
table and figure.
Oil clearance between
crankshaft journal and
crankshaft bearing 1
Crankshaft journal O.D.
Crankshaft bearing 1
I.D.
(Reference)
• Undersize dimensions of crankshaft journal
Undersize
Dimension A
*Dimension B
Dimension C
The crankshaft journal must be fine-finished to higher than ∇∇∇∇
Replacing Crankshaft Bearing 1
(When removing)
1. Press out the used crankshaft bearing 1 using a crankshaft
bearing 1 replacing tool.
(When installing)
1. Clean a new crankshaft bearing 1 and crankshaft journal bore,
and apply engine oil to them.
2. Using a crankshaft bearing 1 replacing tool, press in a new
bearing 1 (2) so that its seam (1) directs toward the exhaust
manifold side.
Dimension (A)
(1) Seam
(2) Crankshaft Bearing 1
(3) Cylinder Block
1-S59
0.040 to 0.118 mm
Factory spec.
0.00157 to 0.00465 in.
0.2 mm
Allowable limit
0.0079 in.
59.921 to 59.940 mm
Factory spec.
2.35910 to 2.35984 in.
59.980 to 60.039 mm
Factory spec.
2.36142 to 2.36374 in.
0.2 mm
0.008 in.
2.8 to 3.2 mm radius
0.1102 to 0.1260 in. radius 0.1102 to 0.1260 in. radius
1.0 to 1.5 mm relief
0.0394 to 0.0591 in. relief 0.0394 to 0.0591 in. relief
59.721 to 59.740 mm dia. 59.521 to 59.540 mm dia.
2.35122 to 2.35197 in. dia. 2.34335 to 2.34410 in. dia.
4.2 to 4.5 mm
Factory spec.
0.1654 to 0.1772 in.
(A) Dimension
ENGINE
0.4 mm
0.016 in.
2.8 to 3.2 mm radius
1.0 to 1.5 mm relief
(0.8S)
W1033717
W10342000
KiSC issued 07, 2007 A