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NE Pumps.
ATTENTION.
When installing the pump impeller in a NE 4 unit, check that
the clearance between the impeller and the flat face of the
body is within 0.010 "(0.25mm) to 0.030" (0.7mm).
Servicing Motor and Mechanical Seal:
•
Remove the body (1) and impeller (4) as stated above.
•
Drain the oil from the casing (16) and remove the valve (22).
•
Remove the screws (13) and separate the motor (5) with the
coupling (3) from the casing (16).
•
Disconnect the motor (5) from the cable assembly (20),
release the coupling screws and remove the seal plate (2)
together with the stationary part of the seal (6) of the motor
(5).
•
Now examine the motor, bearings, and seal components.
•
Upon observation, replace what is worn or damaged.
•
If a replacement requires a seal component, then replace
everything.
•
Carefully reassemble the seal, making sure not to scratch or
mark up the new surfaces.
•
When replacing the seal remove the rotating component,
motor shaft spring, and the fixed part of the coupling. Then
clean the double seal cavity (3).
•
Place the new component into the double seal plate (3) with
the hard side of the fixed part in the seal plate (2). Make sure
the spring on the rotating component is set properly.
17
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