2201Q4JE-MY-C9-N_2018.01.
Chapter 5 Maintenance and Inspection
Compound 2-stage Screw Compressor 4032**C
5.4 Disassembly and Inspection
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5.4.14 Low-stage Bearing Head and Main Bearings
5.4.14.1 Disassembly
a) Unscrew and remove all the hexagon socket head cap screws [2-1].
b) Drive in the alignment pins [3-1] from the bearing head side to the main rotor casing side.
c) Screw tow jacking bolts into screw holes on the flange portion of the main rotor casing, then screw
the bolts evenly to push and separate the bearing head and the main rotor casing.
d) Separate them carefully along the shaft axis, as the unloader push rod [67-1] is engaged.
e) The main bearing [27-1] can be easily pulled out by removing the snap ring [29-1] and then lightly
tapping it from the rotor side via a pad. Otherwise, use a special tool to pull it out.
f) Remove the slide valve as an assembly, using the same procedure as for the high-stage unit.
Carefully perform the work using lifting tools, as you are handling a heavy object.
5.4.14.2 Inspection
The inspection must be performed similarly to the case of the high-stage side.
