2205Q2JE-HO-S6-N_2020.01.
Chapter 5 Maintenance and Inspection
SCV-series Screw Compressor 5.5 Reassembly
5-46
Table 5-11 Unloader Positioning Spacer with Model
g) Attach the O-ring [65] without lubricating oil on the unloader piston [64], and then install the cap seal
[66] on it. It can be smoothly installed by slightly folding the cap seal along the circumferential
direction. Also, using a small and smooth spatula (following picture to the left) will facilitate the
assembling work.
h) Install the unloader piston fitted with the O-ring and cap seal in the unloader cylinder. One side of
the unloader piston is with screw holes for eye bolts, while the other side does not have such holes.
First, to make it easier to fit the cap seal on the wall, lightly press one side of the piston onto the
chamfered area of the unloader cylinder by hand, changing the side of the piston for several times.
Finally, apply lubricating oil to the unloader cylinder, then, push and install the piston with the screw
holes side of the piston facing the unloader cover. After the installation, check that the cap seal is
not broken or pinched.
i) Push the unloader piston into the unloader cylinder and set it in the middle of the cylinder, pull the
unloader push rod [67] toward yourself, and install the balance piston cover with the gasket fitted as
shown in following picture to the left onto the suction cover (following picture to the right).
Pushing the piston into the push rod and temporarily fastening the lock nut [69] in the course of the
work will make later work easier.
Model
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