Gorman Rupp T4A3S-B Pump
Spare Parts for T4A3S-B Self Priming Pump
Product Summary
The Gorman-Rupp T4A3S-B is a legendary 4-inch Super T Series® self-priming centrifugal pump designed for handling solids-laden wastewater and industrial fluids. Renowned for its reliability, it features a removable cover plate for quick clog removal and access to the pump interior without disconnecting piping. Its robust cast iron construction and shimless wear plate adjustment make it a standard in municipal and industrial sewage applications.
- Removable Cover Plate: Provides quick and easy access to the pump interior for inspecting the impeller or clearing clogs without disturbing the piping.
- Shimless Wear Plate Adjustment: External adjustment system allows for maintaining peak efficiency by adjusting the clearance between the impeller and wear plate without special tools.
- Cartridge Mechanical Seal: Double-floating, self-aligning oil-lubricated mechanical seal (Pos. 46513-150) ensures long life and dry-running capability.
- Solids Handling: Designed to pass spherical solids up to 3 inches (76 mm) in diameter, preventing blockages in sewage applications.
- Removable Rotating Assembly: The entire rotating assembly can be removed from the pump casing for inspection or maintenance without disturbing the suction or discharge lines.
Spare Parts List
| Select | Qty | Part Number | Description | Material / Spec |
|---|---|---|---|---|
| 1 | 46513-150 | Mechanical Seal Assembly | Carbon/Ceramic/Viton | |
| 1 | 48271-063 | Pump Repair Kit | - | |
| 1 | 10528 | Impeller | Ductile Iron | |
| 1 | 10527 | Wear Plate | Cast Iron | |
| 1 | 38514 | Impeller Shaft | Alloy Steel | |
| 1 | 25152-149 | O-Ring, Cover Plate | Buna-N | |
| 1 | S1674 | O-Ring, Rotating Assembly | Buna-N | |
| 2 | 10959 | Flange Gasket (4 Inch) | Cork/Cellulose | |
| 1 | 25154-045 | Gasket, Seal Plate | - | |
| 1 | 46413-030 | Check Valve Assy | Rubber/Steel | |
| 2 | S1033 | Ball Bearing | Steel | |
| 1 | S1077 | Oil Seal | - | |
| 1 | S1927 | Sight Gauge | - | |
| 1 | P04 | Pipe Plug (1/4") | Steel |
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Curve | T4A3S-B / Curve T4A |
| Rated Power | Input Dependent (Frame Mounted) |
| Voltage / Frequency | N/A (Bare Shaft Pump) |
| Rated Current | N/A |
| Discharge Connection | 4" NPT (Female) |
| Impeller Type | Two-Vane, Open (Ductile Iron) |
| Installation Type | Surface Mounted / Self-Priming |
Troubleshooting, Common Faults & Solutions
Pump fails to prime
Likely Cause: Suction air leak, pump casing not filled, or excessive lift.
Action / Part: Check cover plate O-Ring (25152-149) and fill casing with water.
Pump stops or fails to deliver rated flow
Likely Cause: Impeller clogged, wear plate worn, or strainer blocked.
Action / Part: Clean Impeller (10528) or Adjust/Replace Wear Plate (10527).
Pump vibrates excessively
Likely Cause: Pump or driver not level, impeller unbalanced, or bearings worn.
Action / Part: Check alignment or replace Bearings (S1033).
Seal leaks oil or water
Likely Cause: Mechanical seal failure due to dry run or abrasion.
Action / Part: Replace Cartridge Seal (46513-150).
Pump bearing overheating
Likely Cause: Low oil level in bearing housing or misalignment.
Action / Part: Check Oil Level (Sight Gauge S1927) or Check Drive Coupling.
Online Resources
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