Installation - Emerson VILTER VSS Installation, Operation And Service Manual

Section 5 • Maintenance/Service
stamped. For the VSS 1551 thru 2101, use the side
rails and assemble to the gaterotor stabilizer. Refer
to Figure 5-21.
7. Remove hex head bolts and socket head bolts from
thrust bearing cover.
8. Re-install two bolts into the threaded jacking holes
to assist in removing thrust bearing cover. Retain
the shim pack.
9. Hold gaterotor support with a suitable wrench on
the flats provided near the roller bearing housing.
10. Remove the inner retainer bolts and retainer.
11. To remove the thrust bearing housing, install thrust
bearing removal and installation tool with smaller
puller shoe. Turn the jacking screw clockwise. The
thrust bearings and housing assembly will be pulled
off the shaft and out of the frame.
12. Remove bolts from roller bearing housing.
13. Re-install two bolts into jack bolt holes provided in
housing to aid in removal.
14. To remove the gaterotor support, carefully move
support in the opposite direction of rotation and
tilt roller bearing end towards the suction end of
the compressor. The compressor input shaft may
have to be turned to facilitate the removal of the
gaterotor support. On dual gate compressor units,
repeat the procedure for the remaining gaterotor
support assembly.

Installation

15. Install gaterotor support by carefully tilting the
roller bearing end of the gaterotor support towards
the suction end of the compressor. The compressor
input shaft may have to be rotated to facilitate the
installation of the gaterotor support. Install gatero-
tor stabilizer. The gaterotor stabilizer (901) will hold
the gaterotor support in place as the thrust bearing
housing is being installed. If the gaterotor support
is not restricted from moving, the gaterotor blade
may be damaged. See Figure 5-22.
16. Install the roller bearing housing (112) with a new
O-ring (141). See Figure 5-23.
17. Tighten bolts (152), see Appendix A.
18. When installing the thrust bearing housing (113), a
new O-ring (142) must be used when the housing
is installed, see Figure 5-23. Lubricate the outside
of the housing and bearings with clean compres-
sor oil to aid in the installation. Due to the fit of the
bearings on the gaterotor shaft, the thrust bearing
removal and installation tool with the pusher shoe
must be used. Turn the jacking screw clockwise.
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
For VSS 451-601
compressors, do not
use side rails.
For VSS 751/901 and 1051-
1301 compressors, use side
rails and assemble gaterotor
stabilizer as stamped.
Position leading edge of main rotor groove
flush with or slightly below back of gaterotor
support.
Figure 5-21. Gaterotor Assembly Removal
and Tools
90 1A
90 1B
90 1C
5 – 21