Goulds Pumps 3656SP Series User Manual Download

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Disassembly

• Follow ALL warnings and instructions in the

“MAINTENANCE” section of this manual.

1. Remove motor hold down bolts.
2. Remove casing bolts (371A).
3. Remove back pull-out assembly from casing (100).
4. Remove guidevane seal ring (349) and discard.
5. Remove casing/adapter gasket (351) and discard.
6. Remove guidevane screws (459) and guidevane (347) from

adapter.

7. Insert a screwdriver into one of the impeller waterways to

restrain motor shaft from rotation and remove impeller
bolt (198). Discard.

8. Remove impeller washer (199), impeller (101), and

impeller key (178). If impeller is difficult to remove, insert
two pry bars between impeller and adapter, 180

apart,

and CAREFULLY pry off impeller.

9. Remove motor adapter bolts (371) and adapter (108) from

motor, pulling with it the mechanical seal (383).

10. Push stationary seat of mechanical seal out of the motor

adapter and discard.

11. Inspect shaft sleeve (126), if damaged or badly scored,

remove by heating with a torch. Discard.

NOTICE: EXERCISE CARE IN HANDLING HOT SHAFT

SLEEVE.

Reassembly

• All parts should be cleaned before reassembly.
• Refer to parts list for description of replacement items.

Specify pump index number when ordering parts.

1. Inspect shaft, removing any debris or burrs.
2. When replacing shaft sleeve, apply new shaft sleeve’s bore

with LOCQUIC

Primer N, or equivalent. Let parts dry

and then apply LOCTITE

#262 on the same surfaces.

Slide new sleeve over shaft with a twisting motion, wipe off
excess. Let cure according to instructions.

NOTICE: MECHANICAL SEAL MUST BE REPLACED

WHENEVER SEAL HAS BEEN REMOVED.
FOLLOW SEAL MANUFACTURER’S
INSTRUCTIONS CAREFULLY.

3. If necessary, seat ring may be lubricated with water or

glycerin to aid in installation. DO NOT contaminate the
seal face. Fully and squarely install the stationary seat into
the adapter. With a clean cloth, CAREFULLY wipe the
seat face clean of debris. DO NOT damage the seal
seat face.

4. Reinstall the motor adapter on the motor, making sure that

the motor shaft does not dislocate or damage the stationary
seal seat.

5. Fully and squarely install the seal rotary assembly against

the stationary seat. Be sure rotating seal face does not drop
out of the holding collar and DO NOT damage seal face.

6. Install impeller key in shaft keyway. Mount impeller on

shaft and push until it bottoms.

7. Install new im peller washer.
8. Insert a screwdriver in a waterway passage of the impeller

holding it against rotation and install the new impeller bolt.

9. Remove any burrs caused by screwdriver on the periphery

of impeller in waterway passages.

10. Replace guidevane, being sure that impeller hub is not

binding, tightening screws alternately and evenly. Check
impeller for binding by rotating the motor shaft by use of a
screwdriver slot or flats on the end of the motor shaft
(removal of the motor end plug or cover will be necessary).
If binding occurs, loosen screws, readjust guidevane until
impeller hub turns freely. Tighten screws.

11. Install new guidevane seal ring.
12. Install new casing/adapter gasket.
NOTICE: ENSURE CASING/ADAPTER GASKET

SURFACES ARE FREE OF DEBRIS OR
LEAKING WILL RESULT.

13. Install motor and rotaing assembly into casing, tighten

casing bolts alternately and evenly.

14. Replace foot bolts and motor end plug or cover.
15. Check for free rotation after assembly is complete.
16. Replace all drain plugs, using Teflon™ tape on male

threads.

17. Prime according to instructions in the “OPERATION”

section of the manual.