Doosan P158LE -III, Руководство по эксплуатации и техническому обслуживанию

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Inspection - 76 -
z
Measurement of cylinder bore
Assemble the cylinder liner at the
cylinder block and measure inner
diameter at upper, middle, lower that
is, 3 steps by 45° interval and
calculate the average values after
eliminating the maximum and
minimum values.
z
Measure the clearance between the
cylinder liner bore and the piston
outer diameter, if it is more than the
use limit value, replace either one
that is more severe.
3) Piston ring and ring groove
a) Inspection
z
In case of piston ring’s wear,
damage or engine overhaul,
replace piston rings.
b) Gap clearance
z
Measure the piston ring cut part.
z
Insert the piston ring at the
cylinder liner’s upper part
perpendicularly.
z
With a feeler gauge, measure the
gap clearance of piston ring.
z
If the measured value exceeds the
limit value, replace it.
<Piston ring gap>
Standard 127.739 ~ 127.757 mm
Standard 0.233 ~ 0.271 mm
Division Standard Limit
Top ring 0.35 ~ 0.55 mm 1.5 mm
2nd ring 0.40 ~ 0.60 mm 1.5 mm
Oil ring 0.40 ~ 0.70 mm 1.5 mm
2
EAMD067I
EA0M4033
Feeler gauge