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

4. ENGINE
1. Measure the O.D. of the crankshaft journal with an
external micrometer.
Crankshaft journal Service specifi-
O.D. cation
2. Measure the I.D. of the crankshaft bearing 1 with an
internal micrometer.
Crankshaft bearing Service specifi-
1 I.D. cation
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.
Service specifi-
Oil clearance be-
cation
tween crankshaft
journal and crank-
Service limit
shaft bearing 1
(Reference)
• Undersize dimensions of crankshaft journal
4-180
59.921 to 59.940 mm
2.3591 to 2.3598 in.
59.980 to 60.039 mm
2.3615 to 2.3637 in.
0.0400 to 0.118 mm
0.00158 to 0.00464 in.
0.20 mm
0.0079 in.
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
0.2 mm
Undersize
0.008 in.
2.8 to 3.2 mm radi-
us
Dimension A
0.11 to 0.12 in. radi-
us
1.0 to 1.5 mm relief
*
Dimension B 0.040 to 0.059 in.
relief
59.721 to
59.740 mm dia.
Dimension C
2.3513 to 2.3519 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
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.
SERVICING
7. Servicing
0.4 mm
0.02 in.
2.8 to 3.2 mm radi-
us
0.11 to 0.12 in. radi-
us
1.0 to 1.5 mm relief
0.040 to 0.059 in.
relief
59.521 to
59.540 mm dia.
2.3434 to 2.3440 in.
dia.
C: Dimension C
KiSC issued 12, 2018 A