Doosan GV158TIC, Руководство по эксплуатации и техническому обслуживанию

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Disassembly and Reassembly of Major Components - 60 -
3.2.7. Valve spring
●
Inspect the outlook of valve spring and if
necessary replace it.
●
By means of spring tester, measure the
tension and free length.
●
Measure the perpendicularity of valve
spring.
●
In case that the measured value exceeds
the limit value, replace it.
< Dual spring perpendicularity regular >
< Single spring perpendicularity regular >
< Valve spring tension standard >
●
Squareness of valve spring:
Measure the sequareness of the valve
spring with the surface plate and the
right-angle square. If the reading exceeds
the tolerance limit, replace the valve
spring.
EA3M2033
Free length
Spring
Inside 65.5 mm
Outside 64 mm
Free length
Intake/
exhaust
Outside 61.9 mm
EA0M4056
S pring tester
Length
(mm)
Spring
tension
(kg)
Limit
Intake/
exhaust
Out-
side
46.8/
32.8
47.0/
90.5
±2.5/
±4.5
Inclination
Free length
EJM2050I
S quare
Standard Limit
Intake/
exhaust
Outside 1.2 mm 2.0 mm