Piston Pin; Connecting Rod; Holes Alignment - Daewoo DE12T Manual

3.2.10. Piston pin

1) Wear
•
Measure the amount of wear on the
piston pin at the points as shown.
•
If the measured values are beyond
the limit (0.005 mm or greater),
replace the pin.
Standard
N 44.995 ~ N 45.0 mm
2) Clearance
•
Measure the clearance between the
piston pin and connecting rod bush-
ing, and replace either of them,
whichever damaged more, if the
measured value is beyond the limit.
Limit
3) 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.

3.2.11. Connecting rod

1) 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.
2) Holes alignment (parallelism)
•
Measure the alignment of the con-
necting rod small bushing hole with
connecting rod big end hole.
•
At this time also, use both connecting
rod tester and feeler gauge.
Standard
0.05 mm
INSPECTION AND MEASUREMENT
Limit
N 44.990 mm or less
0.011 mm
Limit
0.1 mm or less
- 74 -
EA0M4031
EA3M2047
feeler
간극 게이지
gauge
EA0M4034