2205B0JE-DA-J-N_2014.05.
5 Maintenance and Inspection
Screw Compressor J-series
5.4 Disassembly and Assembly of the Compressor
5-47
5.4.13.1 Common Precautions for Removal/Installation
Spiral retaining ring
Do not extend the spiral retaining ring excessively in the circumferential direction.
It may cause injuries if extended excessively in the circumferential direction.
5.4.13.2 Precautions for Removal
Vi
cylinder
1.
Attach the hexagon socket head cap screws (M12 for 170J, M8 for 220J/280J) into the service
holes of the Vi cylinder and tighten them evenly to separate the Vi cylinder from the balance piston
cover in parallel.
2.
After the O-ring part of the Vi cylinder is pulled out, remove the Vi cylinder from the Vi piston by
holding the hexagon socket head cap screws (M12 for 170J, M8 for 220J/280J) used as service
bolts.
Spiral retaining ring
Do not attempt to extend the spiral retaining ring excessively in the axis direction. The ring will
be distorted and can’t reuse it.
Vi piston assembly
1.
Using eyebolts, remove the Vi piston assembly from the Vi push rod.
5.4.13.3 Precautions for Installation
Spiral retaining ring
If the spiral retaining ring is distorted, replace it with new one.
O-ring
(P130/P170/P225)
Do not apply silicon grease to the O-ring (P130/P170/P225) of the Vi piston.
Teflon cap seal
Attach the Teflon cap seal to cover the outside of the O-ring. Make sure both sides of the Teflon
cap seal do not stick out of the O-ring groove on the unloader piston.
Vi
cylinder
1.
Lubricate the inner face of Vi cylinder with lubricant.
2.
Install the Vi cylinder to the Vi piston and push the Vi cylinder into the balance piston cover.
