Kubota D1803-CR-E4 - Checking Set Load of Valve Spring; Checking Oil Clearance between Rocker Arm and Rocker Arm Shaft

2. T
urn the valve spring to measure the maximum tilt
(1).
NOTE
• If the
measurement is more than the service
limit, replace it.
Tilt (1) Service limit
1.0 mm
0.039 in.
(1) Tilt
3. Check the full surface of the valve spring for
scratches.
NOTE
• If there is a damage, replace it.
7.12 Checking set load of valve
spring
T
ools required
• V
alve spring tester
1. Put the valve spring on a tester and compress the
valve spring to the specified setting length.
2. Read the compression load on the gauge.
NOTE
• If the
measurement is less than the service
specification, replace the valve spring.
Setting load / Set-
ting length
Service specifi-
cation
118 N / 35.0 mm
12.0 kgf / 35.0 mm
26.5 lbf / 1.38 in.
Service limit
100 N / 35.0 mm
10.2 kgf / 35.0 mm
22.5 lbf / 1.38 in.
7.13 Checking oil clearance between
rocker arm and rocker arm shaft
Tools required
• Internal micrometer
•
External micrometer
1. Measure the rocker arm I.D. with an internal
micrometer.
Rocker arm I.D.
Service specifi-
cation
14.000 to14.018 mm
0.55119 to 0.55188 in.
2. Measure the
rocker arm shaft O.D. with an external
micrometer.
Rocker arm shaft
O.D.
Service specifi-
cation
13.973 to 13.984 mm
0.55012 to 0.55055 in.
4. ENGINE
SERVICING
7. Servicing
4-168
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
KiSC issued 12, 2018 A