Crankshaft - Kubota EA330-E4 Series Workshop Manual

EA330-E4, WSM

(3) Crankshaft

Oil Clearance between Crank Pin and Bearing
1. Put a strip of press gauge lengthwise on the center of the crank
pin in each direction as shown in the figure.
2. Install the connecting rod cap and tighten the screws to the
specified torque (27 to 30 N·m, 2.7 to 3.1 kgf·m, 20 to 22 lbf·ft)
once, and remove the cap 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 bearing.
NOTE
• Do not insert the press gauge into the crank pin oil hole.
• Fasten the crankshaft so that it does not turn.
(Reference)
• When the crank pin wears further over a long period of use and
oil clearance exceeds the allowable limit after replacing the
standard bearing, use a undersize bearing. Machine the crank
pin according to the following precautions.
Factory specification
Oil clearance between
crank pin and bearing
Allowable limit
Crank pin O.D.
Factory specification
Crank pin bearing I.D.
(When tightening)
(a) 0.52 rad (30 °)
Use of Under size Bearing and Crank Pin Correction
1. Be sure to correctly grind the corner radius of the crank pin.
2. Be sure to chamfer the entire circumference of each oil hole,
using an oil stone.
3. Be sure to precision finish the crank pin section to higher than
0.4S.
Bearing Code No. 15531-2297-1
Bearing Name Crank pin bearing (0.2)
Bearing Mark 0.2 US
Crankshaft machined
36.759 to 36.775 mm
Dimension D
1.4472 to 1.4478 in.
(See figure)
(1) Corner Radius 2.8 to 3.2 mm R
(0.11 to 0.12 in. R)
(2) The End of the Oil Hole Should be
Chamfered to 1.0 to 1.5mm R
(0.040 to 0.059 in. R)
1-S53
0.019 to 0.077 mm
0.00075 to 0.0030 in.
0.2 mm
0.008 in.
36.959 to 36.975 mm
1.4551 to 1.4557 in.
36.994 to 37.036 mm
1.4565 to 1.4581 in.
(b) 0.52 rad (30 °)
9Y1211018ENS0091US0
0.2 mm (0.008 in.) 0.4 mm (0.02 in.)
15531-2298-1
Crank pin bearing (0.4)
0.4 US
36.559 to 36.575 mm
1.4394 to 1.4399 in.
(3) Maker Mark
(4) Manufacture's No.
(5) Size
[A] Marking and Numbering on
Under size Bearing
9Y1211018ENS0092US0
KiSC issued 05, 2015 A
ENGINE