Kubota L4400, Руководство по ремонту

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1-S60
L4400 , WSM ENGINE
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 2
1. Put a strip of plastigage on the center of the journal.
2. Install the bearing case and tighten the bearing case screws 1 to
the specified torque, and remove the bearing case again.
3. Measure the amount of the flattening with the scale and get the
oil clearance.
4. If the clearance exceeds the allowable limit, replace the
crankshaft bearing 2.
5. 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.
NOTE
■
• Be sure not to move the crankshaft while the bearing case
screws are tightened.
(Reference)
• Undersize dimensions of crankshaft journal
W1083821
Crankshaft Sleeve Wear
1. Check the wear on the crankshaft sleeve (1).
2. If the wear exceeds the allowable limit or when the engine oil
leaks, replace the crankshaft sleeve.
W1110651
Oil clearance between
crankshaft and
crankshaft bearing 2
Factory spec.
0.040 to 0.104 mm
0.00157 to 0.00409 in.
Allowable limit
0.20 mm
0.0079 in.
Crankshaft O.D. Factory spec.
59.921 to 59.940 mm
2.35910 to 2.35984 in.
Crankshaft bearing 2
I.D.
Factory spec.
59.980 to 60.025 mm
2.36142 to 2.36319 in.
Undersize
0.2 mm
0.008 in.
0.4 mm
0.016 in.
Dimension A
2.8 to 3.2 mm radius
0.1102 to 0.1260 in. radius
2.8 to 3.2 mm radius
0.1102 to 0.1260 in. radius
*Dimension B
1.0 to 1.5 mm relief
0.0394 to 0.0591 in. relief
1.0 to 1.5 mm relief
0.0394 to 0.0591 in. relief
Dimension C, D
59.721 to 59.740 mm dia.
2.35122 to 2.35197 in. dia.
59.521 to 59.540 mm dia.
2.34335 to 2.34410 in. dia.
(0.8S)
The crankshaft journal must be fine-finished to higher than
∇∇∇∇
Wear of sleeve Allowable limit
0.1 mm
0.0039 in.
(1) Crankshaft Sleeve
KiSC issued 07, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland