General Maintenance - AquaScape EXT 12000 Instructions & Maintenance

Hide thumbs

Table Of Contents

Table of Contents

• Power cord should be protected by conduit or by cable

and be of proper gauge. It should be no longer than

necessary.

• Power should be drawn directly from a box with circuit

breaker protection or with a fused disconnect switch.

Pump End Assembly

• Inspect all pump parts (O-ring, O-ring groove, impeller hub

ID, motor shaft, etc.) and clean if necessary.

• Check motor rotation prior to pump assembly.

• Install threaded rod in end of the motor shaft, leaving

.725"± .005" extended beyond the end of the motor shaft.

Use thread locker to secure in place, let cure overnight.

• Install motor shaft heat shrink tubing sleeve at this time if

required.

• Place slinger over motor shaft.

• Using a silicon based grease such as Molykote 111

lightly grease the OD of the seal head casing/o-ring and

the pump bracket seal bore. Press the seal head assembly

into the pump bracket seal bore to stop by applying

pressure only on the seal casing shoulder (do not press

on the seal head carbon.), a 1-3/4" socket has the right

clearance to press on the seal casing shoulder. Wipe away

any grease squeeze out.

• Lightly grease the seal seat (mating ring) o-ring and

impeller hub ID, press the seal seat into the impeller hub to

bottom, making sure the o-ring has not dislodged and the

seal seat sits fl at in the bottom of the impeller hub. Wipe

away any excess grease. Lightly chamfer the impeller cap

recess.

• Align the bracket over the motor mounting holes and C

face. Install bracket/motor mounting bolts and washers.

Tighten to 75 in. lbs.

• Place 3/16" square key in motor shaft keyway. If a motor

shaft sleeve is installed, the end of the square key will slide

underneath.

• Clean both seal faces with a lint free tissue and alcohol.

WARNING: Do not use grease on the seal faces.

Slide impeller onto motor shaft aligning key and

keyways until seal faces touch.

• Slide the impeller further towards the motor, compressing

the seal and hold in place while placing rubber impeller

washer over the threaded rod until it bottoms in contact

with the motor shaft. Impeller metal washer is next placed

on top of the rubber impeller washer, lightly grease the

side of the metal washer that will contact with the rubber

washer. Lock the impeller in place with the 3/8"-16 hex

jam nut, tighten to 50 in. lbs.

• Lightly grease the impeller cap o-ring gland, place the

o-ring in the gland and lightly grease the outside of the

o-ring and the impeller nose opening. Assemble the

aquascapeinc.com |

CAN (866) 766-3426 |

impeller cap w/ o-ring onto the threaded rod tighten to 50

in. lbs.

• Place large o-ring into the o-ring gland in the pump

bracket, use grease only if required.

• Assemble volute into position aligning over impeller.

• Secure volute to bracket using the supplied fi ve

5/16"-18 x 4" through bolts with washers, lock washers

and nuts and three 5/16"-18 x 1-1/4" long bolts with

washers and lock washers into the molded inserts.

Tighten all bolts to 75 in. lbs.

• Apply thread sealant to the drain plug threads, tighten to

seal.

• Discharge hardware is supplied as it uses non-standard

(and possibly hard to fi nd) nuts.

Disassembly

• Shut off power to motor before disconnecting any

electrical wiring from the motor.

• Disassemble volute from bracket by removing the fi ve

5/16"-18 x 4" long hex cap screws, and the three 5/16"-

18 x 1.25" hex cap screws.

• Pump/Bracket/Impeller Assembly may now be pulled back

from the Volute.

• Remove impeller eye 'cap' by unscrewing

counterclockwise. Remove impeller locknut, unscrew

counterclockwise. Slide impeller off of motor shaft.

• Remove mating ring from impeller. Eye protection is

strongly recommended. (If you are replacing the seal)

• Detach bracket from motor.

• Remove mechanical seal from bracket by pressing out

from the back. Do not dig out from the front. (If you are

replacing the seal).