Kubota ZD221-48 Workshop Manual page 126

ZD221 , WSM
ENGINE
3TMABAB1P081A
D
B
A
3EEABAB1 P152B
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 2 (Crankshaft Bearing 3)
1. Put a strip of plastigage on the center of the journal.
2. Install the bearing case and tighten the baring 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 (1) and crankshaft bearing (3).
5. If the same size bearing is useless 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.
Oil clearance between
crankshaft journal and
crankshaft bearing 2
(crankshaft bearing 3)
Crankshaft journal
0.0.
(Flywheel side)
Crankshaft bearing 2
I.D.
Factory spec.
Allowable limit
Factory spec.
Factory spec.
0.028 to 0.059 mm
0.0011 to 0.0023 in.
0.20mm
0.0079 in.
43.934 to 43.950 mm
1.7297 to 1.7303 in.
43.978 to 43.993 mm
1.7315 to 1.7320 in.
Crankshaft journal
0.0.
(Intermediate)
Factory spec.
39.934 to 39.950 mm
1.5722 to 1.5728 in.
Crankshaft bearing 3
I.D.
Factory spec.
39.978 to 39.993 mm
1.5740 to 1.5745 in.
(Reference)
• Undersize dimensions of crankshaft journal
I
Undersize
0.2mm 0.4 mm
0.008 in. 0.016 in.
Dimension A
-:1.8 to 2.2 mm radius
1.8 to 2.2 mm radius
.071 to 0.087 in.radius 0.071 to 0.087 in.radius
-Dimension B
1.0 to 1.5 mm relief 1.0 to 1.5 mm relief
0.040 to 0.059 in. relief 0.040 to 0.059 in. relief
Dimension C
39.734 to 39.750 mm dia.
39.534 to 39.550 mm dia.
1.5643 to 1.5650 in. dia. 1.5565 to 1.5571 in. dia.
Dimension D
43.734 to 43.750 mm dia.
43.534 to 43.550 mm dia.
1.7219 to 1.7224 in. dia. 1.7140 to 1.7145 in. dia.
(0.8S)
The crankshaft joumal must be fine-finished to higher than
'\7'\7'\7'\7.
-Holes to be de-burred and edges rounded with 1.0 to 1.5 mm
(0.0394 to 0.0591 in.) relief.
W10340750
1-S54