Hydraulics - Removal And Refitting - ABS XFP 80C-CB1 PE22/4-C-50 Workshop Manual

8 Workshop Manual
ABS submersible sewage pump XFP 80C - 150E
5.1

Hydraulics - Removal and Refitting

Jacking bolt (min length 100 mm)
XFP 80C & 100C = M12
XFP 100E, 150E & 151E = M14
Fig 2. Jacking bolt
266
265
(e)
Fig 3. Bottom plate adjust
Shaft
Impeller
Blank or
washer
Threaded
bore
Factory pre-set position
(b)
(a)
fixing
lugs
Adjustment position
Removing Impeller.
Remove screws (150) to release volute (149) from motor housing
(55).
Connect hoist to lifting hoop, lift motor housing assembly from
volute and lay securely on its side on workbench.
Remove screw (144) and washer (145) from motor shaft.
Pull impeller from shaft by tightening jacking bolt against the shaft
through the threaded impeller bore (see Fig 2).
Note: To protect the shaft bore threads from damage by the
jacking bolt, place an adequately sized metal blank or washer at
the opening of the shaft bore, against which the jacking bolt can
be tightened. Otherwise the shaft bore may need to be re-tapped
before the securing screw can be re-fitted.
Note: The jacking bolt procedure is not possible with XFP 80E.
This impeller must be pushed off the shaft using two screwdrivers
to apply leverage between the top of the impeller and the motor
housing.
Refitting Impeller.
Remove impeller key (66) from shaft. Clean and refit.
Add grease to shaft.
Fit impeller to shaft, aligning with impeller key.
Fit washer (145) and screw (144).
Note: DO NOT use a hammer blow to force the impeller onto the
shaft as the shock can damage the mechanical seals. If the fit
is tight, pull the impeller onto the shaft using the securing screw
(144).
Refitting Volute and Bottom plate.
Remove screws (266) to release bottom plate (163) from volute.
Remove bottom plate and O-ring (164) from volute.
Note: 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 (265) against the fixing lugs on the volute as this
could damage the bottom plate lugs beyond repair!
In that case remove the bottom plate by tapping it free from inside
the volute using a mallet and block of wood.
Inspect O-ring for damage and replace if necessary. Clean and
(e)
lubricate, and fit to bottom plate.
Inspect O-ring (133) for damage and replace if necessary. Clean
and lubricate, and fit to motor housing.
Refit volute to motor housing assembly. Align cable-entry housing
with discharge outlet of volute and secure.
Fit bottom plate with fixing screws (266).
Note: At manufacture the clearance gap between the impeller and
bottom plate is pre-set, and the bottom plate is fitted to the volute
(e)
at position (a) with the alignment notch (e) positioned as shown
(Fig 3). If, following wear, the gap needs to be adjusted, the bottom
plate must be rotated anti-clockwise through
volute at position (b).
Resetting clearance gap between impeller
and bottom plate.
Loosen adjusting grub screws (265).
Tighten screws (266) evenly by the required amount. When
gap is correct the impeller will lightly, but freely, rub against the
bottom plate when rotated by hand. For optimum performance the
maximum allowable gap is 0.2 mm.
Tighten the grub screws fully to secure the bottom plate in position
- DO NOT OVERTIGHTEN!.
45° and fitted to the