Reciprocating Compressor M Series
7-28
3. Measure the inner diameter of the shaft hole at the small end of the connecting rod.
If the inner diameter of the shaft hole exceeds the usage limit, replace the connecting rod bushings.
Measurement point
Standard
dimensions
(mm)
Usage limit
(mm)
Inner diameter of the shaft hole at the small
end of the connecting rod
45 45.1
Cylinder sleeve
1.
Inspect the surface of the suction valve seat on the top of cylinder sleeve for scratches.
If there are scratches on the surface of the valve seat, repair them by lapping.
2. Measure the height of the valve seat section. (Refer to 7-10)
If the height of the valve seat section exceeds the usage limit, replace the cylinder sleeve.
Measurement point
Standard
dimensions
(mm)
Usage limit
(mm)
Height of valve seat section of cylinder
sleeve: A
0.5 0.2
3. Inspect the inner surface of the cylinder sleeve for scratches.
If scratches are found in the inner surface, repair it by using a smooth grinding stone.
4. Measure the inner diameter of the cylinder.
If the inner diameter of the cylinder exceeds the usage limit, replace the cylinder sleeve.
z The section 5²7 mm from the top of the inner surface of the cylinder sleeve is the section most
worn.
Measurement point
Standard
dimensions
(mm)
Usage limit
(mm)
Inner diameter of the cylinder 146 146.2
Discharge Valve (Assembly)/ Suction Valve (Assembly)
1.
Replace the discharge plate valve, suction plate valve, and valve spring periodically. The endurance time
depends on the use condition.
Measure the depth of the wear at the contact surface to valve seat. (Refer to 7-10)
If the contact surface to valve seat is worn for 0.15 mm or more, replace the discharge plate valve, suction
plate valve, and valve spring
Measurement point
Standard
dimensions
(mm)
Wear limit (mm)
Depth of the wear at the contact surface to
valve seat of discharge plate valve: B
Depth of the wear at the contact surface to
valve seat of suction plate valve : C
² 0.15
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