Rotor Nuts
Both rotors on the pump are retained on the shaft by flanged rotor nuts. Each nut carries an
o-ring which seals the end of the rotor and shaft.
The rotor nuts are handed as follows:
Top Shaft - Left hand thread
Bottom Shaft - Right hand thread
Once the rotor nuts are removed, the o-rings must be carefully inspected for damage and
replaced if necessary.
On reassembly, the rotor nuts should be tightened to the correct torque settings.
Front Cover
Rotor Nut
Rotor
Shaft
Fig. 3
Page 10
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