Product Manual

10. While wearing clean gloves or using a clean rag, press
seal seat squarely into adapter recess. Avoid scratching
the polished surface. If seal seat will not position properly,
place a cardboard washer over the polished surface and
use a piece of pipe to press in, firmly but gently.
11. After seal seat is in place, dispose of cardboard washer.
Check that seat is clean and has not been marred.
12. Using a clean cloth, wipe the shaft and make certain that
it is perfectly clean.
13. Secure the adapter on the motor mounting surface with
fasteners.
14. Wet the inside rubber portion of the new seal cartridge
with a light coating of soapy water. 316A-95 and 316B-95:
Slide cartridge onto motor shaft until cartridge meets seal
seat. 393A-95, 393B-95, 394A-95, 394B-95, 394E-95,
394F-95 and 399C-95: Slide cartridge onto shaft sleeve.
Slide shaft sleeve with seal cartridge onto motor shaft until
cartridge meets seal seat. Reinstall impeller key.
15. Reinstall any impeller shims which have been removed.
(See "Shim Adjustment" section).
16. 316A-95 and 316B-95: Screw impeller back in place,
tightening until it is seated against shims and shaft
shoulder. 393A-95, 393B-95, 394A-95, 394B-95, 394E-95,
394F-95 and 399C-95: Replace impeller key, impeller, o-
ring, and impeller lock bolt. Tighten lock bolt until impeller
is seated against shims and shaft sleeve.
17. Remount volute with fasteners.
18. Refer to section entitled Shim Adjustment at this time if
shaft sleeve or any other parts listed have been replaced.
19. Inspect position of flapper valve to ensure proper
movement and sealing.
20. Replace o-ring seal on volute rabbet.
NOTE: Always inspect o-ring seals. Replace when cracked or
worn. Wet o-ring with soapy water for ease of assembly.
21. Remount casing.
22. Remount any other parts and reconnect power.
SHIM ADJUSTMENT
When installing a replacement impeller, motor, shaft sleeve,
adapter, or volute, it may be necessary to adjust the number of
impeller shims (Ref. No. 4) to insure proper running clearance
between impeller and the volute wear surface. Proceed as
follows:
NOTE: Proper running clearance is 0.010".
1. For impeller replacement, add one (1) shim in addition to
those removed originally.
2. For motor replacement, add one (1) shim in addition to the
shims removed during disassembly.
3. Reassemble the pump as described in steps 15, 16, and
17. (See "Mechanical Seal Replacement" section).
IMPORTANT: Check the shaft to make sure it is turning freely
(rotate the impeller by the impeller lock bolt with an Allen
wrench or by the acorn nut with a socket wrench). If it turns
freely, check to insure that the volute and adapter are fitted
metal-to-metal where they meet on the outside. If they are not
metal-to-metal, tighten fasteners and recheck the shaft for free
turning. Tighten carefully, turning the shaft while tightening so
that the motor bearings are not damaged in the event that too
many shims were installed. If shaft seizes before fasteners are
completely tight, disassemble the pump and remove one (1)
shim and repeat reassembly.
NOTE: When adding or removing shims it is best to proceed
with a 0.010" increment each time. If motor shaft does turn
freely, add shims until it does strike, then remove a 0.010"
shim. This will insure maximum performance.
IMPELLER, WEARPLATE, AND VOLUTE REPLACEMENT
Impeller (Ref. No. 3), wearplate (Ref. No. 23) and volute (Ref.
No. 2) are subject to wear only by abrasive sand or sediment
laden liquids. If badly worn, all these parts can be replaced
easily and the pump thus restored to full efficiency.
NOTE: When the clearance between the impeller and the
volute exceeds 1/16" at the face of the impeller or 1/8" on the
outside diameter of the impeller, it may be necessary to take
corrective action. The increased clearance can cause
lengthened priming times and reduce pumping capacity. If
both the priming and capacity of your unit are satisfactory for
your application, it is recommended that no corrective
maintenance be performed regardless of what clearances on
your unit may have developed, since the increased clearances
in themselves are not generally harmful to your pump.
Normally, new pump clearances can be restored by simply
shimming behind the impeller. (Add impeller shims (Ref. No.
4). If the impeller is badly worn, it is recommended that the
impeller be replaced. This is usually all that is required since
only on unusually abrasive service does the cast iron
wearplate and volute show deterioration. Occasionally a stone
or hard object might get caught in the impeller and cause
damage to the volute. In these cases, follow the instructions
below for replacement and refer to the associated Repair Parts
Illustration.
1. Disassemble pump for access as described in
MECHANICAL SEAL REPLACEMENT, steps 1, 2, 3 and
4.
2. Replace parts as necessary.
NOTE: When replacing volute, attach flapper valve to new
volute.
3. To replace rear wearplate (Ref. No. 23), remove impeller
(Ref. No. 3), and fasteners (Ref. No. 24).
NOTE: Before installing new parts, clean all mating surfaces
thoroughly.
CLEANING
These units are designed with a removable volute and suction
cleanout cover (394A-95, 394B-95, 394E-95, 394F-95 and
399C-95) enabling the pump to be cleaned or unclogged with
ease. Remove the suction clean out cover plate (Ref. No. 26)
and gasket and/or remove the casing and volute. Remove any
debris found inside the unit, reassemble as described in
MECHANICAL SEAL REPLACEMENT steps 17 to 22.
NOTE: When replacing clean out cover plate, carefully wipe
clean all surfaces on which the gasket has contact. Also, make
sure the gasket is in position.
FLAPPER VALVE CLEANING
If debris clogging the flapper valve becomes a constant
problem, the flapper area can be cut from the perimeter gasket
area and removed from the pump. It is important that the
perimeter of the flapper valve remains to seal the inlet area of
the casing/volute from the discharge area.
NOTE: Priming efficiency will be reduced if flapper portion is
removed.
NOTE: Do not remove entire flapper valve. Perimeter of valve
must remain; remove only the flapper area. The pump will not
prime and performance will be affected if entire flapper valve is
removed.
Specifications Information and Repair Parts Manual
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