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6
Pump Reassembly
1. Install the spring end of the mechanical seal
onto the impeller shaft. Be sure black/carbon
face is facing outward.
2. Remount the seal plate to the motor using the
four (4) lock washers and four (4) nuts.
3. With the white ceramic face facing outward, press
the seal into the seal plate with your thumbs and
wipe off the ceramic with a clean cloth. Do not
lubricate seal faces.
4. Hand tighten impeller onto the motor shaft.
5. Screw in the impeller reverse lock screw (counter-
clockwise to tighten).
6. Install the rear plastic cover on the back of the
motor.
7. Remount the diffuser onto the seal plate. Make
sure the plastic pins and holding screw inserts
are aligned (see "TOP" indicator).
8. Assemble the motor subassembly to the housing.
Do not tighten the nuts and washers until all
four (4) motor bolts are in place. Using a torque
wrench, install and tighten the four nuts to a
torque value of 100 in-lbs (maximum). Do not
overtighten the nuts.
Nuts /
Lock Washers (x4)
Motor Base
H3-Plus Series™ and L3-Plus Series™ Series Energy Efficient Aquaculture Duty Pump Installation and User's Guide
9. Fill the H3-Plus Series™ or L3-Plus Series™
Aquaculture Duty Pump with water.
10. Reinstall the pump lid and locking ring; see
Maintenance on page 4.
11. Reprime the system. Refer to page 3 for priming
instructions.
The Mechanical Seal
The mechanical seal consists primarily of two parts, a
rotating member and a ceramic seal. The pump requires
little or no service other than reasonable care. However,
a mechanical seal may occasionally become damaged
and must be replaced.
Spring Half:
Carbon face is
pointing outward
Seal Plate
Diffuser
O-Ring #446
Pump Illustrated Parts View
Mechanical Seal
Seal Plate
Mechanical
Seal
Impeller
Reverse Thread
Impeller Screw
Diffuser Screw
(x3)
Ceramic &
Rubber Half:
White ceramic face
is pointing outward
Diffuser O-Ring
#336
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