Checking Oil Clearance Between Crankpin And Crankpin Bearing; Checking Oil Clearance Between Crankshaft Journal And Crankshaft Bearing 1 - Kubota D1803-CR-E4 Workshop Manual

SERVICING
7. Servicing
RELATED PAGE
4.30 Measuring angular deviation between crankshaft
T.D.C. and crankshaft position sensor detected T.D.C.
on page 4-112
7.1 Checking cylinder head top clearance on page
4-162
7.32 Checking oil clearance between
crankpin and crankpin bearing
Tools required
• Plastigauge
1. Clean the crankpin and crankpin bearing.
2. Put a strip of plastigauge on the center of the
crankpin.
NOTE
• Do not put the plastigauge into the crankpin
oil hole.
3. Install the connecting rod cap.
4. Tighten the connecting rod screws to the specified
torque.
NOTE
• When you tighten the connecting rod
screws, do not move the crankshaft.
Tightening tor- Connecting rod
que screw
5. Remove the connecting rod cap again.
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 crankpin bearing.
• If the same dimension bearing is not
applicable because of the crankpin wear,
replace it with an undersize one.
Service specifi-
Crankpin O.D.
cation
Crankpin bearing Service specifi-
I.D. cation
Service specifi-
Oil clearance be-
cation
tween crankpin
and crankpin bear-
Service limit
ing
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
40.0 to 45.0 N⋅m
4.08 to 4.58 kgf⋅m
29.5 to 33.1 lbf⋅ft
46.959 to 46.975 mm
1.8488 to 1.8494 in.
47.000 to 47.046 mm
1.8504 to 1.8522 in.
0.025 to 0.087 mm
0.00099 to 0.0034 in.
0.20 mm
0.0079 in.
(Reference)
• Undersize dimensions of crankpin
0.2 mm
Undersize
0.008 in.
3.3 to 3.7 mm radius
Dimension A
0.13 to 0.14 in. radius
Dimension 1.0 to 1.5 mm relief
*
B 0.040 to 0.059 in. relief
46.759 to 46.775 mm
Dimension dia.
C 1.8409 to 1.8415 in.
dia.
The crankpin 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
7.33 Checking oil clearance between
crankshaft journal and crankshaft
bearing 1
Tools required
• External micrometer
• Internal micrometer
4. ENGINE
0.4 mm
0.02 in.
3.3 to 3.7 mm radius
0.13 to 0.14 in. radius
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
46.559 to 46.575 mm
dia.
1.8331 to 1.8336 in.
dia.
C Dimension C
4-179
KiSC issued 12, 2018 A