5-7
5.3 Compressor Disassembly Preparation
Screw compressors are very reliable compressors. However, it is necessary to disassemble and
inspect parts after a certain period of operation.
This chapter 5 describes the essential points of disassembly methods, where to inspect on parts, and
reassembly procedure of the i-series compressor.
As a general rule, overhauling of the screw compressor that require complete disassembly should be
done at the maintenance factory.
At the installation location of the compressor, it is only possible to inspect/replace mechanical seals and
suction strainers.
Read this manual thoroughly and fully understand the compressor structure as well as the work
procedure before starting work.
Numbers denoted by [ ] that follow part names refer to the part numbers (P/N) used in assembly
sectional views or parts configuration table.
5.3.1 Disassembly Tools and Work Place
Prepare special hand tools required for disassembly. Refer to Section 7.2 "Disassembly Tools" in this
manual Chapter 7.
In addition, prepare standard hand tools, green carbonite grinding stone, #80- to #100-grit sandpapers,
# about #400 to #800 sandpapers, parts cleaner, lubrication oil, a squirt can, a can for oil sump, and a
waste cloth.
A work bench with a large surface plate is useful to perform work accurately and with ease.
If the surface plate cannot be prepared, use a commercially available steel plate. The steel plate should
be approximately 1000 mm × 1500 mm in size and have a thickness of approximately 1.5 mm if the
work location is flat.
Perform the work in a dry place with as little sand and dust as possible, with a sufficiently wide space
around there. In addition it is necessary a temporary storage place for disassembled parts.
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