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1. Turn off the pump leaving it installed in the line.
2. Ensure electrical power is disconnected and locked out.
3. Close the water supply at the points closest to the pump's
inlet and outlet.
4. Bleed the water pressure from the pump.
5. Place a pan under the pump to collect the drain water.
6. While holding the motor body, unfasten the four bolts that
attach the motor to the pump casing (volute). Start with the
two bottom bolts first and remove them, then slowly loosen
the top two bolts. Allow the water to drain from the bottom
of the pump. When the water has finished draining, remove
the two top bolts. Remove the motor straight out from the
volute, being careful of its attached impeller. The motor is
heavy; do not drop it!
7. Locate the snap bushing in the center of the back of the
motor housing and pry it out with a screwdriver. Insert a
straight-blade screwdriver into the snap bushing hole and
into the slot in the end of the motor shaft to lock the rotor.
8. While holding the rotor (step 7), unscrew the plastic
impeller off the motor shaft by hand turning it clockwise
(i.e. opposite to most bolts and nuts!). Place the motor on its
back, with its shaft up.
9. Remove the rotary part of the mechanical seal by gently
pulling it off the shaft. If too tight use two small flat bladed
screwdrivers. Gently pry it off the shaft by placing the flat
side of the blades onto opposite sides of the mechanical seal.
10. Remove the stationary part of the seal by gently prying it off
the steel faceplate.
11. Remove any corrosion present on the stainless steel motor
shaft with a nonmetallic brush or scrub pad. Do not use a
wire brush or steel wool.
1070-AP SERIES
12. Install the new stationary part of the seal into the faceplate:
first, the rubber cup by firmly pressing it down until it
bottoms, then the ceramic disk. The disk face with a circular
groove should be put against the rubber cup (the visible disk
face should be smooth). Press the disk firmly down until it
too bottoms into the rubber cup. The ceramic disk should be
clean. If needed, wipe it with alcohol and a soft cloth.
13. Install the new rotating part of the seal by gently pushing it,
by hand, onto the shaft (graphite ring first) until its steel cap
stops on the shaft.
Check that:
a. The height of the steel cap over the ceramic disk is
between 0.33" and 0.35" (8.4 mm and 8.9 mm). If it is
more than 0.35" (8.9 mm), then try pushing it farther
down, carefully, but harder.
b. The graphite disk is pressed against the ceramic disk (by
a spring inside it).
If either (a) or (b) is not happening, then contact
Aurora Pump: phone (630) 859-7000 or e-mail
ap_applications@pentair.com.
14. "Lock" again the motor rotor and shaft as per step 7 above,
in order to perform the next step.
15. Fasten the plastic impeller onto the shaft, turning it by hand
counterclockwise until it stops (when it touches the seal's
steel cap). Do not tighten it excessively.
16. Ensure the gasket is properly seated in the pump casing
(volute) gasket groove. Holding the motor body, insert the
impeller straight into the volute. Verify the gasket was not
dislodged during insertion and is still seated properly. Hold
the motor body steady while fastening the four bolts that
attach the motor to the pump casing (volute). Tighten evenly
and diagonally. There should be a small, even gap of about
0.02" (0.5 mm) all around between the motor flange and the
pump casing (volute).
17. Follow the START-UP instructions and check for leaks.
5
SECTION 2 ITEM 1070-AP
DATED NOVEMBER 2012
SUPERCEDES MAY 2010
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