ITT GT07 User Manual

4

Hazardous voltage
can shock, burn or
cause death.

Hazardous voltage
can shock, burn or
cause death.

  1. Remove foot bolt (10).
  2. Remove casing bolts (12).
  3. Remove back pull-out assembly from casing (2).
  4. Remove diffuser seal ring (3) and diaphragm (4).
  5. Remove diffuser screws (5) from adapter (11).
  6. Remove motor end plug or cover.
  7. Restrain motor shaft from rotation by utilization of

the screwdriver slot, or 

7

⁄

16

" shaft flats, accessible at the

motor shaft end.

  8. Remove impeller (7), turning COUNTER-

CLOCKWISE.

  9. Using two screwdrivers, pry off rotary section of

mechanical seal (8). Discard. See Figure 2.

10. Remove motor adapter bolts (12) and remove motor

adapter from motor.

11. Push stationary seat of mechanical seal out of

motor adapter. Discard seal seat.

•

 Clean and inspect all parts before reassembly.

  1. Inspect seal seat bore for wear and debris, clean and

replace as necessary.

  2. 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, lint free cloth,
CAREFULLY wipe the seat face clean of debris. DO
NOT damage the seal seat face.

  3. Reinstall the motor adapter on the motor, making sure

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

  4. Fully and squarely install the seal rotary assembly

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

  5. On three phase units, impeller MUST be installed with

LOCTITE

®

 “Purple”. Hold shaft from rotating, as

explained in the “DISASSEMBLY” section of the
manual, and install impeller by turning CLOCKWISE
until tight against motor shaft shoulder.

  6. Replace diffuser. Align to prevent impeller rub.

  7. Install new diaphragm and new diffuser seal ring.

  8. Install motor and liquid end into casing.

  9. Check impeller for binding by rotating the motor shaft.

If binding occurs, loosen casing bolts, readjust diffuser
until impeller hub turns freely. Retighten casing bolts in
a crossing pattern.

10. Replace all drain plugs and motor end components.

11. Reprime and operate according to instructions in the

See Probable Causes 1 through 5.

See Probable Causes 3, 4, 6 through 12, 15.

See Probable Causes 3, 6, 7, 10, 12, 13, 14.

  1. Motor thermal protector tripped.
  2. Open circuit breaker or  blown fuse.
  3. Impeller binding.
  4. Motor improperly wired.
  5. Defective motor.
  6. Pump is not primed, air or gases in pumpage.
  7. Discharge, suction plugged or valve closed.
  8. Incorrect rotation. (3 phase only)
  9. Low voltage or phase loss.
10. Impeller worn or plugged.
11. System head too high.
12. NPSH

A

 too low – excessive suction lift or loss.

13. Discharge head too low – excessive flow rates.
14. Pump, motor or piping loose.
15. End of suction piping not submerged.