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12. Others/driving system
200
DV2213157A
Piston Ring and Ring Groove
1. In case of piston ring’s wear, damage or engine over-
haul, replace piston rings.
2. Piston ring gap clearance: measure the piston ring cut
part.
1) Insert the piston ring at the cylinder liner’s upper part
perpendiculary.
2) With a feeler gauge, measure the gap clearance of
piston ring.
DV2213158A_E
3) If the measured value exceeds the limit value, replace
it.
DV2213159A_E
Piston pin
1. Wear
1) Measure the wear amount of the piston pin with a
outside micrometer.
2) If the reading exceeds the tolerance limit, replace the
pin.
DV2213160A
2. Clearance
1) Measure the clearance between the piston pin and
connecting rod bush.
Item
Standard
Piston outside diameter
Ø
127.739~
Ø
127.757mm
CAUTION
By comparing the measured value of the piston
outside diameter with the cylinder liner inside diam-
eter, the bigger clearance is replaced.
Gap gauge
Item
Standard
Limit
Top ring
0.35 ~ 0.55mm
1.5mm
2nd ring
0.50 ~ 0.82mm
1.5mm
Oil ring
0.30 ~ 0.62mm
1.5mm
Item
Standard
Limit
Outside diameter
Ø
45.994~
Ø
46.000mm
Ø
45.983mm
Gap gauge