Doosan P158LE -III, Руководство по эксплуатации и техническому обслуживанию

Страница: 78 / 165

Inspection - 75 -
3.2.7. Piston
1) Piston disassembling
z
Pull out the snap ring for piston pin
and with a pair of snap ring pliers.
z
With a round bar, remove the piston
pin.
z
With a pair of pliers, remove the
piston rings.
z
Clean the piston thoroughly.
2) Inspection & measurement of the piston
z
With naked eyes, inspect the piston
for any wear, crack and scratch and
particularly inspect carefully at the
ring grooves for any wear.
z
With the outside micrometer,
measure the piston’s outside
diameter the measuring position is
71.5 mm from the piston lower end,
and the direction of measurement
must be perpendicular to the piston
pin direction.
z By comparing the measured value of
the piston outside diameter with the
cylinder liner inside diameter, the
bigger clearance is replaced.
Standard 127.739 ~ 127.757 mm
EA3M2029
EFM2051I
71.5 mm
EA3M2045