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Kubota D1803-CR-E4 - Replacing Crankshaft Sleeve; Replacing Crankshaft Bearing 1

Kubota D1803-CR-E4
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1. Measure
the
O.D. of the crankshaft journal with an
external micrometer.
Crankshaft journal
O.D.
Service specifi-
cation
59.921 to 59.940 mm
2.3591 to 2.3598 in.
2. Measure the
I.D. of the crankshaft bearing 1 with an
internal micrometer.
Crankshaft bearing
1 I.D.
Service specifi-
cation
59.980 to 60.039 mm
2.3615 to 2.3637 in.
3. Calculate the oil clearance.
NOTE
If
the
oil clearance is more than the service
limit, replace the crankshaft bearing 1.
If the same dimension bearing is not
applicable because of the crankshaft journal
wear, replace it with an undersize one.
Oil clearance be-
tween crankshaft
journal and crank-
shaft bearing 1
Service specifi-
cation
0.0400 to 0.118 mm
0.00158 to 0.00464 in.
Service limit
0.20 mm
0.0079 in.
(Reference)
Undersize dimensions of crankshaft journal
Undersize
0.2 mm
0.008 in.
0.4 mm
0.02 in.
Dimension A
2.8 to 3.2 mm radi-
us
0.11 to 0.12 in. radi-
us
2.8 to 3.2 mm radi-
us
0.11 to 0.12 in. radi-
us
Dimension B
*
1.0 to 1.5 mm relief
0.040 to 0.059 in.
relief
1.0 to 1.5 mm relief
0.040 to 0.059 in.
relief
Dimension C
59.721 to
59.740 mm dia.
2.3513 to 2.3519 in.
dia.
59.521 to
59.540 mm dia.
2.3434 to 2.3440 in.
dia.
The crankshaft journal must be fine-finished to higher than Rmax
= 0.4 S
* Holes to be de-burred and edges rounded with 1.0 to 1.5 mm
(0.040 to 0.059 in.) relief.
A: Dimension A
B: Dimension B
C:
Dimension C
RELATED PAGE
7.35 Replacing crankshaft bearing 1 on page 4-181
7.34 Replacing crankshaft sleeve
Tools required
Sleeve guide
Crankshaft sleeve press fit tool
Removing crankshaft sleeve
1. Remove the used crankshaft sleeve.
Installing crankshaft sleeve
1. Set the sleeve guide (2) to the crankshaft (5).
2. Set the stopper (1) to the crankshaft (5) as shown
in figure.
NOTE
Make sure
that the large chamfer of the
sleeve points to outward.
3. Heat a new sleeve to the specified temperature.
4. ENGINE
SERVICING
7. Servicing
4-180
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
KiSC issued 12, 2018 A

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