2202MYJE-MY-C8-N_2018.02.
Chapter 5 Maintenance and Inspection
Compound 2-stage Screw Compressor 3225**C 5.4 Disassembly and Inspection
5-34
5.4.13 High-stage Rotors and Main Rotor Casing
5.4.13.1 Disassembly
a) While you can pull out the rotor either from the M or F side, you should be very careful in the work as
either rotor is very heavy.
When pulling out the M rotor (or F rotor) first, pull out about 2/3 of the full length of the rotor by
holding the shaft upward and turning it in the CW (or CCW) direction.
You should carefully note that the rotor must be rotated in the specified direction
while pulling it out. If the M (F) rotor is not turned during the pulling out process,
the F (M) rotor can also be pulled out together.
b) As a preparation, use a nylon belt or other lifting belt that will not blemish the lifting surface to
support the center of the rotor. Then, pull out the rotor while slightly lifting up the rotor using the belt.
Photo 042 Pulling Out the F Rotor
Photo 043 Lifting Up the F Rotor
Photo 044 Pulling Out the M Rotor
Photo 045 Lifting Up the M Rotor
c) The pulled out rotor should not be directly
placed on the floor. Use appropriate wood
boards to support the rotor as a cushion to
prevent blemishing or use V-blocks to support
the shaft to prevent blemishing of the outer
surface (See Photos 046 and 048.)
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