2205B0JE-DA-J-N_2014.05.
5 Maintenance and Inspection
Screw Compressor J-series
5.4 Disassembly and Assembly of the Compressor
5-43
5.4.12.1 Common Precautions for Removal/Installation
Unloader cylinder assembly
If the lifting equipment and lifting slings in use do not have sufficient loading
capacity, the unloader cylinder assembly may fall causing injuries and damage to
the compressor.
Before starting the lifting work, always check that the lifting equipment and lifting
slings have sufficient loading capacity. Do not allow anyone to be under the lifted
unloader cylinder assembly.
(Unloader cylinder assembly weight: 30 kg for 170J, 60 kg for 220J, 90 kg for 280J)
5.4.12.2 Precautions for Removal
Unloader cylinder assembly
1.
Remove the plastic caps from the eyebolt holes and service holes.
2.
Attach eyebolt (M12) in eyebolt hole.
3.
Remove the two upper hexagon socket head cap screws (M12×70/M16×90/M20×110) and attach
stud bolts for safety.
4.
Remove the hexagon socket head cap screws (M12×110/ M16×140/ M20×170).
5.
Insert the hexagon socket head cap screws (M12) into the service holes and tighten the hexagon
socket head cap screws evenly.
6.
After the fitted part of the unloader cylinder and balance piston cover is separated, pull the
unloader cylinder assembly horizontally towards yourself to remove the unloader cylinder
assembly from the unloader slide valve push rod.
7.
Lift and carry the unloader cylinder with lifting equipment by using the attached eyebolt (M12) on
the unloader cylinder.
Push the unloader slide valve push rod into the inner part of unloader cylinder using eyebolts
(M8) attached to the unloader piston, before removing the unloader cylinder.
Pull the unloader cylinder straight and horizontally not to damage the unloader
slide valve push rod.
Unloader cylinder partition plate
1.
Using eyebolts (M8), remove the unloader cylinder partition plate.
