2201Q4JE-MY-C9-N_2018.01.
Chapter 5 Maintenance and Inspection
Compound 2-stage Screw Compressor
4032**C
5.5 Reassembly
5-33
5.5 Reassembly
During the reassembly work, be very careful in selecting the correct replacement
O-rings of the specified standard, not to make a mistake regarding the size, material, for
fixed use, for sliding use, etc. Using a wrong O-ring can lead to oil leak or other
problems.
Some gaskets are not symmetrically shaped. In such a case, be careful not to misplace
the gasket. If the gasket is misplaced, it can lead to a significant problem such as
blocking any oil supply route on the casing.
After completing the disassembly and inspection procedures, start the assembly process.
Fist, read Section 5.1 "Precautions for Maintenance and Inspection" again in this Chapter 5.
Before starting the assembly, check the replacement parts once again.
Like gaskets, all O-rings that have been removed during the compressor disassembly must be replaced
with new ones.
The assembly sequence is mostly the reverse of the disassembly sequence. First of all, clean the work
bench and the tools to be used.
Immediately prior to the assembly, use washing agent (e.g., kerosene, parts cleaner) to clean the parts
to be assembled, dry them with compressed air, and sufficiently apply lubricating oil, etc. For this,
prepare a sufficient amount of clean lubricating oil for the reassembly. Also, apply oil on both sides of
the gasket.
Because the assembly procedure is mostly similar between the high-stage and low-stage, the following
Sections provide explanations that are commonly used for both stages. For this purpose, the part
number given in the common explanations will omit the distinction between high-stage and low-stage
by means of a hyphenated suffix (the suffix of [**-1] for low-stage and [**-2] for high-stage part number
will be omitted).
Please fully understand the details in this Section 5.5 for correct assembly work.
Table 5-6 Tightening Torques for Hexagon Socket Head Cap Screws
Torque unit
M6
M8
M10
M12
M14
M16
M20
M24
M30
N
・
m
10
25
50
90
140
240
450
750
1600
kgf
・
cm
100
250
500
900
1400
2400
4500
7500
16000
When fastening the hexagon socket head cap screws, use the tightening torque specified in the above
table.
