Primary Ring
Chamfered Edge
Impeller Gasket
Stationary Ring
O-Ring
Bellows Assembly
Page 17 of 21
MECHANICAL SEAL AND IMPELLER
E501-C Pumps Only:
Note: The bellows assembly fits tight on the im-
peller hub. This tight fit is necessary for the seal
to withstand the high pressures this pump
creates. Use plenty of mechanical seal lubricant
and push bellows assembly onto impeller hub us-
ing a slight twisting motion to ease installation.
Note: If Waterous Mechanical Seal Lubricant part no.
52608 is not available, P80 rubber lubricant, straight dish
soap or glycerin may be substituted.
1.
Install the impeller gasket.
2.
Coat the impeller hub and inside diameter of the bel-
lows assembly with mechanical seal lubricant. Install
bellows assembly onto impeller hub with the primary
ring facing away from the impeller. Make sure the pri-
mary ring stays in its retainer (use a small amount of
grease on the backside of the primary ring as needed
to keep the ring in place).
3.
Clean the sealing surface of mechanical seal primary
ring with soft cloth and denatured alcohol.
4.
Place key in shaft keyway and install the impeller onto
the shaft.
5.
Install the Nord-LockR washer (see Detail A). Install
impeller nut using Loctite 542. Torque nut to 60-70 ft-lbs.
maximum.
E501-C Mechanical Seal Diagram
Nord-Lock
→
Washer (See Detail
A)
E501-C Mechanical Seal Lubrication Details
Bellows
Clean sealing surfaces with rubbing
alcohol and a soft cloth.
Apply Mechanical
Seal Lubricant to
Inside of Bellows
E501-C
Stationary
Ring
Apply Mechanical Seal
Lubricant to O-Ring
Summary of Contents for E500 Series
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