Gardner Denver Oberdorfer 800B Replacement Instructions

Seal Replacement Instructions
The following instructions are general. Although the illustrations may not depict the specific centrifugal
pump model you are concerned with, the seal components are similar for all centrifugal pumps.
1. Remove Pump Cover.
This exposes the centrifugal impeller.
2. Remove Pump Impeller
(SEE FIGURE 1) The impeller is threaded onto the shaft.
Unscrew impeller from shaft by shocking with screwdriver
and hammer. Note that all impellers unscrew in the same
direction as the pump rotates. Thus, the impeller unscrews
counter clockwise when facing the open end of the pump.
However, Model 800B has left hand threads and unscrews
clockwise.
Usually the shock force alone is sufficient to
unscrew the impeller. In extreme cases it may be necessary to
restrain the shaft. For pedestal centrifugal pumps, the exposed
drive end of the shaft can be clamped in a vise and restrained
accordingly. For pumps close coupled mounted to electric
motors, restrain the shaft via the screwdriver slot in opposite
end of motor shaft. (SEE FIGURE 2) The impeller hub exten-
sion may also be gripped with a pipe wrench, channel lock, or
vise grip to loosen and remove it.
If motor does not have a screwdriver slot in opposite
end of shaft, restrain motor shaft by inserting screwdriver
through air openings in motor body to bear against fan or
cooling air projections of motor armature. Exercise care not
to damage motor fan or armature.
3. Remove Pump Body (or pump casting containing the
seal)
On some models, the pump body is clamped to motor
adapter by a single bolt. Loosen nut and slide pump body off.
On other models, the seal is contained in the pedestal
bracket or adapter to the motor.
*Teflon® is a registered trademark of DuPont.
Permatex® and Locktite® are registered trademarks of Locktite Corporation.
315-437-0361 or 800-448-1668
Centrifugal Pumps:
Fax: 315-463-9561
FIGURE 1
FIGURE 2
web: www.oberdorfer-pumps.com