2202L5JE-DA-C5-N_2015.05.
5 Maintenance and Inspection
Compound 2-stage Screw Compressor
5.3 Compressor Disassembly Preparation
1612LSC Speed Increaser Type
5-12
5.3.5 Compressor Removing and Lifting
The work to lift up or move the compressor must be performed by a qualified operator.
Make sure that the lifting equipment and wires have sufficient load capacity for the
compressor before starting the compressor lifting work.
Never try to perform disassembly or assembly while the compressor is lifted in the air.
Since the suction piping is located immediately above the compressor, hold it up or partially
remove it before lifting the compressor.
For the lifting positions of the compressor, refer to Figure 3-1 in page 3-3 of Chapter 3 in this
manual.
If the planned overhaul work includes separation between low-stage and high-stage blocks of the
compressor, place the compressor on a special stand as shown in Photo 004 and then remove
eight or more hexagon head cap screws around the bottom flange part.
Never try to remove
these bolts while the compressor is lifted in the air.
Note that these bolts cannot be removed
once the compressor is placed on the work bench.
Lifting the Compressor
Lower Bolts for Tightening Rotor Casing
5.3.6 Removing Oil from Inside the Compressor
Since there is a large quantity of oil inside the compressor, remove it beforehand.
There is a plug [10] under the suction cover [5-1] and a plug [15] under the bearing head [11-1].
Most of the oil will flow from these plug holes. The remaining oil will flow onto the work bench during
disassembly.
Main locations remaining oil are a) inside the unloader cylinder, b) inside the balance piston cover, c)
inside the seal cover [51], and d) inside the suction cover [5-1]. Prepare a tray and cloth for oil that spills
during disassembly.
