Replacing Small End Bushing - Kubota D1803-CR-E4 Workshop Manual

4. ENGINE
1. Measure the piston pin O.D. where it contacts the
bushing with an external micrometer.
Service specifi-
Piston pin O.D.
cation
2. Measure the small end bushing I.D. at the
connecting rod small
micrometer or cylinder gauge.
Small end bushing Service specifi-
I.D. cation
3. Calculate the oil clearance.
NOTE
• If the clearance more than the service limit,
replace the bushing.
• If it still more than the service limit, replace
the piston pin.
• When replacing the small end bushing,
select the cylinder head gasket thickness to
meet with the top clearance.
Service specifi-
Oil clearance be-
cation
tween piston pin
and small end
Service limit
bushing
RELATED PAGE
7.26 Replacing small end bushing on page 4-174
4-174
25.004 to 25.011 mm
0.98441 to 0.98468 in.
end with an internal
25.025 to 25.040 mm
0.98524 to 0.98582 in.
0.014 to 0.036 mm
0.00056 to 0.0014 in.
0.15 mm
0.0059 in.
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
4.29 Selecting cylinder head gasket on page 4-111
7.1 Checking cylinder head top clearance on page
4-162

7.26 Replacing small end bushing

Tools required
• Small end bushing replacing tool
Removing small end bushing
1. Press out the used bushing with small end bushing
replacing tool.
(A) Removing direction
Installing small end bushing
1. Clean a new small end bushing and bore.
2. Insert a new bushing onto the tool.
NOTE
Apply engine oil to a new small end bushing
and bore.
(B) Installing direction
3. Press-fit it with a press so that the seam (1) of
bushing position as shown in the figure, until it is
flash with the connecting rod.
SERVICING
7. Servicing
KiSC issued 12, 2018 A