| Pump Assembly, Standard Spa
Pump |
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Note that the purpose of this section is to
show you how to assemble a spa pump. While every effort is made to be
sure that virtually all areas of complexity are covered, you may find it more
difficult or sometimes easier to accomplish this task. Use common
sense. If the pump assembly or components that you have on your spa are a
lot different from what is depicted here, then do not use these
instructions.
Safety Warnings!
| Remove Power from the spa/hot tub BEFORE performing this
procedure. Failure to comply with this requirement, can lead to
electrical shock and/or electrocution! |
Disclaimer
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instructions here are intended for general reference only. Many pumps
are different from the one depicted here, and may require more or less
mechanical effort or knowledge in order to achieve the desired
results. |
READ FIRST BEFORE YOU
CONTINUE
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Pumps and Parts Price Listings:
Complete Pumps,
Wet Ends,
Motors,
Seals,
Impellers,
Kits.
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In this pump assembly procedure, we are building an entirely new
pump, using a 1.0 HP Emerson motor, and a center discharge Waterway wet
end.
To get things started, first slide
the rubber 'water slinger' away from the front of the pump motor. I
always apply Waterlube anti-corrosion lubricant to the pump shaft, all the way
to the bearing. This simple application will save your pump motor from
damage caused by seal failure in the future.
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Apply Waterlube brand anti-corrosion lubricant liberally around the
pump shaft and a little on the threads. Be sure to get as close to the
bearing entrance as possible. This coating will prevent the rusting of
the pump shaft in the event of pump seal failure.
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Since this is a new pump
motor, we first have to remove the retaining nuts from the thru-bolts before we
can mount the wet end to it. If you are only replacing the wet end, then
skip this step.
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Next, remove the access cover
to the pump shaft. Other types or brands of motors may have a different
back cover to gain access to the armature shaft. Newer style Emerson with
a pop-out plastic cover is shown to the right.
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| Franklin
Electric |
Magnetek |
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These three pictures show how to
put the wet end on the pump motor. Carefully insert the pump shaft into
the impeller opening of the wet end until it bottoms out. Here I'm using
my fingers to hold the impeller in place through the suction opening.
Then, using a screwdriver, rotate the armature clockwise to thread the impeller
onto the shaft. It should NEVER require more than finger-tip force to do
this. If you are installing a Franklin Electric pump motor, you will need to
use pliers or other suitable tool to rotate the armature shaft. Remember,
this is a very simple procedure, requiring very little
force. As
you tighten the assembly, the impeller will pull away from the front of the wet
end, and "spring-load" the pump seal. It is very normal to
experience an increase in rotational pressure at this point. Simply
continue turning the shaft until it stops. Never try to tighten the
impeller more than this. The normal operation/rotation of the pump motor
will always keep the impeller tight.
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Re-install the armature end
cover, and tighten the long through bolts into the wet end. There
are 4 bolts to do this with, and it is recommended to tighten them in an X
fashion. If
you have difficulty getting all of them seated, be sure to only fully tighten
them after all four bolts have been at least started into the threads.
The assembly of the pump is now complete.
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