18 Installation, Operating and Maintenance Instructions (Original Instructions)
ABS submersible sewage pump XFP 80C - 201G
9.7
Bottom plate adjustment
At manufacture, the bottom plate is fi tted to the volute with the correct clearance gap set between the impeller
and the bottom plate (for optimum performance max 0.2 mm).
9.7.1 Instructions on how to adjust the bottom plate
To reset the clearance gap following wear:
(
Note:
when adjusting PE3 pumps, steps 1, 2 and 3 do not apply)
Check the position of the alignment notch (e) in the fi xing lug to determine if the bottom plate is in the fac-
tory pre-set position or if the clearance gap has been previously adjusted. If previously adjusted proceed to
Step 4.
Remove the three screws (c) securing the bottom plate to the volute.
Attention:
if, due to corrosion, the bottom plate does not release freely from the volute, DO NOT force it
free by tightening the adjusting grub screws (d) against the fi xing lugs on the volute as this could damage
the lugs on the bottom plate beyond repair! In that case, fi rst remove the volute from the motor housing by
releasing the three securing screws (f) and then remove the bottom plate by tapping it free from inside the
volute using a mallet and block of wood.
Rotate the bottom plate anti-clockwise through 45° from the pre-set position (a) to the secondary alignment
position (b) and refi t the securing screws.
Loosen the adjusting grub screws (d) and tighten the securing screws in the bottom plate evenly until the
impeller will lightly, but freely, rub against the bottom plate when rotated by hand.
Tighten the grub screws fully to secure the bottom plate in position (max. 33 Nm).
Factory pre-set position
Fixing lugs
Adjustment position
1.
2.
3.
4.
5.
(c)
(d)
(b)
(a)
(e)
(c)
(d)
(b)
(a)
(e)
(e)
(e)
(e)
(e)
(f)
(f)