Checking Oil Clearance Between Idle Gear Shaft And Idle Gear Bushing; Checking Piston Pin Bore I.d; Checking Oil Clearance Between Piston Pin And Small End Bushing - Kubota D1803-CR-E4 Workshop Manual

SERVICING
7. Servicing
7.23 Checking oil clearance between
idle gear shaft and idle gear bushing
Tools required
• External micrometer
• Internal micrometer
1. Measure the idle gear shaft O.D. with an external
micrometer.
Idle gear shaft Service specifi-
O.D. cation
2. Measure the idle gear bushing I.D. with an internal
micrometer.
Idle gear bushing Service specifi-
I.D. cation
3. Calculate the oil clearance.
NOTE
• If the oil clearance is more than the service
limit, replace the bushing.
Service specifi-
Oil clearance be-
cation
tween idle gear
shaft and idle gear
Service limit
bushing
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
37.959 to 37.975 mm
1.4945 to 1.4950 in.
38.000 to 38.025 mm
1.4961 to 1.4970 in.
0.025 to 0.066 mm
0.00099 to 0.0025 in.
0.10 mm
0.0039 in.
RELATED PAGE
7.20 Replacing idle gear bushing on page 4-171

7.24 Checking piston pin bore I.D.

Tools required
• Cylinder gauge
1. Measure the piston pin bore I.D. in the horizontal
and vertical directions with a cylinder gauge.
NOTE
• If the measurement is more than the service
limit, replace the piston.
• When replacing the piston, select the
cylinder head gasket thickness to meet with
the top clearance.
Service specifi-
cation
Piston pin bore
I.D.
Service limit
RELATED PAGE
4.29 Selecting cylinder head gasket on page 4-111
7.1 Checking cylinder head top clearance on page
4-162
7.25 Checking oil clearance between
piston pin and small end bushing
Tools required
• External micrometer
• Internal micrometer or cylinder gauge
4. ENGINE
25.000 to 25.013 mm
0.98426 to 0.9476 in.
25.05 mm
0.9862 in.
4-173
KiSC issued 12, 2018 A