Replacing Bearing Case Cover Oil Seal - Kubota D1803-CR-E4 Workshop Manual

4. ENGINE
6. Measure the width that it becomes flat with the
scale to get the oil clearance.
NOTE
• If the clearance more than the service limit,
replace the crankshaft bearing 2.
• If the same dimension bearing is not
applicable because of the crankshaft journal
wear, replace it with an undersize one. Refer
to the table and figure.
Crankshaft journal
O.D.
Service specifi-
cation
Crankshaft bearing
2 I.D.
Oil clearance Service specifica-
between crank- tion
shaft journal
and crankshaft
Service limit
bearing 2
(Reference)
• Undersize dimensions of crankshaft journal
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, D
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.
4-182
59.921 to 59.940 mm
2.3591 to 2.3598 in.
59.980 to 60.025 mm
2.3615 to 2.3631 in.
0.0400 to 0.104 mm
0.00158 to 0.00409 in.
0.20 mm
0.0079 in.
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.
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
A: Dimension A
B: Dimension B
C: Dimension C
7.37 Replacing bearing case cover
oil seal
Tools required
• Bearing case cover oil seal replacing tool
Removing bearing case cover oil seal
1. Remove the used oil seal by using appropriate tool.
NOTE
• Be careful not to scratch the bearing case
cover.
Installing bearing case cover oil seal
1. Clean a new oil seal (1) and bearing case cover (2).
(1) Oil seal
2. Set the bearing case cover on the bearing case
cover oil seal replacing tool 1 (3) and fix it with
bolts.
3. Apply a layer of engine oil to the seal outer
periphery.
4. Install the oil seal into the bearing case cover by
using the bearing case cover oil seal replacing tool
2 (4) as shown in the figure, until it is flash with the
bearing case cover.
SERVICING
7. Servicing
D: Dimension D
(2) Bearing case cover
KiSC issued 12, 2018 A