Gorman Rupp T8A3S-B Pump
Spare Parts for T8A3S-B Self Priming Pump
Product Summary
The Gorman-Rupp T8A3S-B is an 8-inch Super T Series® self-priming centrifugal trash pump, renowned for its ability to handle solids-laden liquids and slurries. Designed for economical, trouble-free operation, it features a removable cover plate for quick access to the impeller and wear plate without disconnecting piping. Its rugged cast iron construction makes it a standard for industrial and municipal wastewater applications.
- Solids Handling: Capable of passing spherical solids up to 3.00 inches (76.2 mm) in diameter[cite: 580].
- Removable Cover Plate: Provides quick and easy access to the pump interior for clearing clogs or servicing the wear plate without disturbing piping[cite: 541].
- Cartridge Seal: Features a double-floating, self-aligning mechanical cartridge seal (46513-153) for easy installation and long life[cite: 1183].
- External Shimless Adjustment: The external shimless cover plate allows for easy adjustment of the clearance between the impeller and wear plate to maintain peak efficiency[cite: 1602].
- Self-Priming: Designed for re-priming lifts up to 25 feet, suitable for suction lift applications above the wet well[cite: 975].
Spare Parts List
| Select | Qty | Part Number | Description | Material / Spec |
|---|---|---|---|---|
| 1 | 44163-291 | Repair Rotating Assembly | Complete Unit | |
| 1 | 46472-714 | Pump Casing Assembly | Cast Iron | |
| 1 | 46513-153 | Cartridge Seal Assembly | Mechanical | |
| 1 | 12349 | Impeller | Ductile Iron | |
| 1 | 12348A | Wear Plate | Cast Iron | |
| 1 | 38515-587 | Impeller Shaft | Alloy Steel | |
| 1 | 23421-461 | Ball Bearing (Inboard) | Steel | |
| 1 | 23422-412 | Ball Bearing (Outboard) | Steel | |
| 3 | S1917 | Oil Seal | Rubber | |
| 1 | 25152-384 | O-Ring (Pump Casing) | Rubber | |
| 4 | 25154-026 | O-Ring (Seal Plate) | Rubber | |
| 1 | 12350G | Gasket | Cork/Fiber | |
| 1 | 50G | Cover Gasket | Rubber | |
| 1 | 46411-066 | Check Valve (Flap) | Rubber/Steel | |
| 1 | 46431-628 | Pressure Relief Valve | Bronze/Steel |
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Curve | T8A3S-B / Curve T8A-B-3 |
| Rated Power | Motor Dependent (Frame Listed on Drive) |
| Voltage / Frequency | Motor Dependent |
| Rated Current | See Motor Nameplate |
| Discharge Connection | 8" NPT (Standard) [cite: 476] |
| Impeller Type | 2-Vane Open Ductile Iron [cite: 990] |
| Installation Type | Self-Priming Surface Mount |
Troubleshooting, Common Faults & Solutions
Pump fails to prime
Likely Cause: Not enough liquid in casing, air leak in suction line, or clogged check valve.
Action / Part: Add liquid through fill plug (31), seal suction joints, clean Check Valve (26).
Pump stops or fails to deliver flow
Likely Cause: Suction intake not submerged, impeller blocked, or strainer clogged.
Action / Part: Check submergence[cite: 596], clear Impeller (12349) or Strainer.
Bearings run too hot
Likely Cause: Low or incorrect lubricant, drive misaligned, or excessive speed.
Action / Part: Check oil level (Sight Gauge 14A), align drive[cite: 741], check RPM.
Excessive Noise
Likely Cause: Cavitation, pumping entrained air, or loose mounting hardware.
Action / Part: Check suction lift/lines, secure pump mounting bolts.
Leaking Seal
Likely Cause: Worn mechanical seal faces or damaged sleeve.
Action / Part: Replace Cartridge Seal Assembly (46513-153)[cite: 1470].
Online Resources
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