2202G1JE-DA-M-N_2010.01.
7 Related Document
Reciprocating Compressor M Series
7.7 Parts Inspection and Replacement Standards
7-34
4.
Measure the outer diameter of the piston pin.
If the outer diameter is below the usage limit, replace the piston pin.
Measurement point
Standard
dimensions (mm)
Usage limit (mm)
Outer diameter of the piston pin
45 44.93
5.
Check the wear condition of the piston ring by measuring the abutment joint interval (a).
Place the piston ring at a position of approx. 3 mm from the top of the cylinder sleeve and measure the
abutment joint interval (a).
If the abutment joint interval (a) exceeds the usage limit, replace the piston ring.
Measurement point
Standard
dimensions (mm)
Usage limit (mm)
Abutment joint interval of the piston ring (1st, 2nd, and 3rd)
0.3
~
0.5
2.5
6.
Measure the width of the piston ring groove of the piston.
If the width exceeds the usage limit, replace the piston.
Measurement point
Standard
dimensions (mm)
Usage limit (mm)
1st
2.5 2.6
2nd
2.0 2.1
Width of the piston ring groove of the piston
3rd
3.0 3.1
Oil
Pump
If the oil pressure is low though the oil pressure adjustment valve is closed during the operation, and if the cause
is not the clogging of the oil filter, there may be wear on the gears, metals, and shafts of the oil pump.
1.
Remove the pump from the compressor, hold the shaft of the pump, and inspect the shaft for looseness by
moving it to the axial direction or right angle of the axial direction.
If the shaft is loosened, replace the oil pump as an assembly.
Main
Bushing
1.
Measure the inner diameter of the main bushing.
If the inner diameter exceeds the usage limit, replace the main bushing.
Measurement point
Standard
dimensions (mm)
Usage limit (mm)
Inner diameter of the main bushing (seal side)
125 125.36
Inner diameter of the main bushing (pump side)
110 110.36
2.
Measure the thickness of the thrust washer.
If the thickness is below the usage limit, replace the thrust washer.
Measurement point
Standard
dimensions (mm)
Usage limit (mm)
Thickness of the thrust washer
3.0 2.8
Springs
Replace the discharge valve spring and suction valve spring periodically.