DE08TS Diesel Engines
Maintenance
c. Piston ring side clearance
• Fit the compression ring and oil ring in the piston
ring groove.
• With a feeler gauge, measure side clearance of
each ring, and replace either the ring or piston if the
measured value is beyond the specified limit.
d. Piston ring tension
With a tension tester, measure piston ring tension.
Replace the piston ring if the measured value is
beyond the limit.
4. Piston pin inspection
a. Wear
Measure the amount of wear on the piston pin at the
points as shown. The measured values are beyond
the limit (0.08 mm or greater), replace the pin.
b. Clearance
Measure the clearance between the piston pin and
connecting rod bushing, and replace either of them,
whichever damaged more, if the measured value is
beyond the limit.
c. Condition check
Check the engaged condition of the piston and
piston pin. If it is possible to force the pin into the
piston heated with piston heater, the piston is
normal. When replacing the piston, be sure to
replace the piston pin together.
5. Connecting rod inspection
a. Distorsion
Check the connecting rod for distortion. As
shown in the figure below, install the connecting
rod to the connecting rod tester, and check for
distortion using a feeler gauge. If the connecting
rod is found distorted, never re-use it but replace
with a new one.
EA3M2047
EA0M4031
EA0M4032
Feeler gauge
48
Standard
Limit
Top ring
-
-
2nd ring
0.07 ~ 0.102 mm 0.15 mm
Oil ring
0.05 ~ 0.085 mm 0.15 mm
Standard
Top ring
2.58 ~ 3.88 kg
2nd ring
1.81 ~ 2.71 kg
Oil ring
3.57 ~ 5.03 kg
Standard
Limit
N
41.994 ~
N
42.000 mm
N
41.94 mm
Standard
Limit
0.003 ~ 0.015 mm
0.08 mm
