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Always flush pump with water, or neutralizing agent,
before servicing.
Pump Housing Disassembly (All Models)
In most cases, seal replacement requires disassembly of only
the pump half of the unit.
NOTE:
Instructions following in italics describe procedures for
the polypropylene centrifugal pumps, when different than the
cast iron pumps.
1. Remove the four casing cap screws with 9/16"
box end wrench. Tap pump casing on discharge port with
rubber hammer, if necessary, to break loose from mounting
flange. Check inside of pump casing including suction port.
If badly eroded [or damaged], pump casing should be
replaced. Remove o-ring and discard. o-ring should always
be replaced. [Using a 1/2" wrench, remove the six bolts from
the front. Also remove the 5/16" screw from the rear near the
outlet port.]
2. To remove the impeller nut, clamp the flange in a vise and
insert a large screwdriver or file (at least 10" long) into
impeller vanes to prevent impeller from turning when
loosening nut. Use a socket wrench (3/4" for Series 9000C
or 5/8" for Series 9200C and 9400C) to remove the impeller
nut by turning it counterclockwise (Fig. A). [Use 7/8" deep
socket wrench to remove plastic seal nut, then 9/16" deep
socket to remove metal jam nut, rubber gasket and washer.]
3. Once the nut [and washer] is removed, place a screwdriver
on each side (Fig. B) behind the impeller and pry away from
the mounting flange. Remove woodruff key from the shaft
(for Series 9000 only). Remove o-ring from the mounting
flange. NOTE: Fig. B shows 9000C gear flange. The same
general procedure applies for the other pumps.
Pump Seal Removal
1. Lightly lubricate shaft for easier removal of seal. Using two
screwdrivers positioned opposite each other, pry the rotary
portion of the seal from the shaft (Fig. C).
2. [Remove plastic back cover flange. Knock seal out from
back with a hammer and screwdriver.]
3. Remove stationary seat and boot by prying out with two
small screwdrivers in manner similar to impeller removal.
(Caution: The seal will be damaged by removal in this
manner. A new seal and rubber gasket MUST be used
when pump is reassembled.)
Clean-Up Of Pump Housing
1. Using the circular bottle-type wire brush with air or hand
drill, clean the discharge port, suction port and the sealing
areas of the o-ring on the pump casing and mounting
flange. [The last step should not be performed on the
polypropylene models.]
2. After wire brush cleaning, it is recommended that the pump
casing and mounting flange be further cleaned in a solvent
tank to remove rust and corrosion particles.
Pump Shaft and Bearing Assembly Removal and
Replacement
1. While the pump is disassembled (see the Pump Housing
Disassembly section), the driven pulley on the pump shaft
must be removed. Remove the large retainer ring in pump
bearing bore on the pulley side of housing. Press out the
shaft and bearing assembly from the pump side using an
arbor press.
2. Bearings must be pressed off each end of shaft and
replaced in the same manner. NOTE: Shaft diameter
between bearings is larger.
3. For reassembly, reverse the order of instructions.
Seal Replacement/Pump Housing Reassembly
NOTE:
Reassemble if drive end is not to be repaired.
Be extremely careful with the new seal. Take special care not
to scratch the lapped sealing faces of the rotary washer and
stationary seat.
1. Lubricate seal cavity in mounting flange with WD-40, LPS
or equivalent.
2. Install the stationary portion of the mechanical seal by
sliding over the shaft with the ceramic side out.
IMPORTANT:
Make sure the seal cavity is clean and
lubricated. Never run the sealing faces dry.
3. To seat the seal in the seal cavity, use a piece of 3/4" PVC
pipe 4" to 6" in length. Press it in firmly and squarely.
4. To install the rotary portion of the mechanical seal, place it
over the shaft with the carbon side facing in, and press until
it bottoms out against the stationary portion (Fig. D).
5. Insert key into shaft key slot. Place impeller on shaft. Put
[washer, jam nut and gasket] impeller nut on shaft end, and
using a large screwdriver or file in the impeller vanes for
support, tighten impeller nut securely.
6. Install o-ring on mounting flange. Replace o-ring if worn or
damaged.
7. Place pump casing on mounting flange, insert and tighten
bolts evenly.
Repair Instructions
Recommended repair tools for
use with these instructions:
C
D
A
B
