26
Operating Manual for
FAN Press Screw Separator PSS 1.1-300
S
13.4 INSPECTING AND REINSTALLING THE AUGER
The auger is made of stainless steel. In the area of the screen, the auger blades have been plated with
a special material according to a special process, see Fig. 13-12.
Inspect the auger for any damage and
clean it. The axial contact surface of the
auger mount shown in Fig. 13-12 and
the feather key grooves must be free of
solid matter and must not exhibit any
damage or markings; otherwise the au-
ger will rotate out of true, thereby dam-
aging the screen.
If both the auger and the screen are in
good condition [see the following section
for the criteria to evaluate the auger and
the screen], the auger can be installed.
Fig. 13-12 Auger plated with special material and hub mount,
new condition
Insert the auger carefully into the separator
without
striking the feather keys against the axial contact
surface of the auger. This could cause the auger to exhibit axial eccentricity. Turn the auger until the
feather keys snap into the feather key grooves of the auger. Then press the auger upward and screw it
with the auger bolt again (tightening torque 81lbf ft).
Check the auger again for axial eccentricity. This should
be less than 1 mm, otherwise the screen will be dam-
aged. Fig. 13-13 shows the axial eccentricity check at
the factory. If the axial eccentricity is larger, inspect the
auger and fastening elements again for damage, marks
and soiling.
Then readjust the scraping bolts. To do this, loosen the
lock nuts and slowly adjust the scraping bolts while turn-
ing the auger until the bolts scrape against the auger.
Then turn the bolts back approx. 30° and lock the lock
nuts. The scraping bolts must be readjusted every 4
weeks.
Fig. 13-14 Scraping bolts
Fig. 13-13 Inspection of the auger axial eccentricity
