S50HT datasheet(4/16 Pages) PENTAIR

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Pump Disassembly

S40HT Series

410 0893

Pump Disassembly

Oil Fill

Plug

Housing

Capscrew

Rotor/Stator

Assembly

Stator

Capscrew

Lower

Motor

Housing

Volute

Shaft Seal,

Stationary

Head Ass'y

Shaft Seal,

Rotating

Mating Ring

O-Ring

Insulating

Disk

Blk

Grn

Impeller

Power Cord

Impeller and Seal Replacement,

Model S50HTPC1

Risk of electrical shock. Disconnect

electrical power before doing any service work on pump!

Refer to assembly drawing.

Disassembly

1. Unscrew hex-head cap screws, remove motor assembly

from volute and set it on its side in a clean area.

2. Remove oil plug. Turn pump upside down to drain oil.

3. Hold impeller; remove impeller nut and washer.

4. Unscrew impeller (turn counter-clockwise) for cleaning.

Risk of electric shock. Before touching

capacitor, discharge it by shorting the terminals

together with an amber handled screwdriver.

5. Loosen cord nut and gently pull cord assembly out from

motor cover. Disconnect wires from cord set (wires and

connector are color coded for reassembly).

6. Unfasten socket head screws holding motor cover to seal

plate and remove motor cover.

7. Remove rotating half of seal off of shaft.

8. Cradle motor assembly so that it stands vertically with

motor shaft extending out of the bottom.

9. Remove through bolts from motor assembly. Remove

motor and shaft from seal plate.

10. Working from back of seal plate, tap primary seal head

out of seal plate; thoroughly clean seat cavity.

Re-assembly

NOTICE: Make sure that seal faces are clean and

undamaged. Apply Permatex #2 or equivalent sparingly to

outside edge of seal body (with spring) Figure 2.

1. Press new seal body into cavity in seal plate (Figure 2).

Slide ceramic

part onto

shaft.

Don't damage

rubber ring

on groove

Install washer,

then clip.

033 0893

Permatex

here

Impeller side of seal plate

Press seal

into cavity

Figure

2. Reinstall motor and shaft to seal plate using the four

through bolts removed in step 9 under “Disassembly”.

NOTICE: Do not overtighten through bolts!

3. Slide new rotating half of seal onto shaft (Figure 3).

NOTICE: Do not nick or scratch the silicon carbide seal

face when passing it over shaft shoulder. Seal faces

must be clean and undamaged or seal may leak.

Slide ceramic

part onto

shaft.

Don't damage

rubber ring

on groove

Install washer,

then clip.

033 0893

Permatex

here

Impeller side of seal plate

Press seal

into cavity

Figure 3

4. Reassemble impeller, washer, and impeller nut.

5. Inspect O-Ring carefully; replace if damaged. If it is not

nicked or scratched, clean and reinstall.

NOTICE: It is good practice to replace O-Ring each time

pump is serviced.

6. Reinstall capacitor cover, feeding wire through connector

hole, then reconnect cord wires to connector. Reference

color code markings.

7. Fill motor with clean dielectric oil. To allow room for

expansion, oil level with cold motor should be about 1/4"

(6 mm) above top of motor assembly.

Motor Lead Connections (S50HTP1 only)

Connect to PW217-280 panel or duplex panel 27400A245.

Leads From

Stator

White

Red

Black

Green

Black

Capacitor

1308 1094

Motor Leads

White

Red

Black

Green

Black

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