Gorman-Rupp T4A3S-B Super T Series Pump
Spare Parts for the Gorman-Rupp T4A3S-B Self-priming trash pump
Product Summary
Genuine OEM spare parts for the Gorman-Rupp T4A3S-B, a self-priming trash pump that handles solids-laden liquids and re-primes automatically. Impellers, seals, wear parts, check valves and bearings are listed below with Gorman-Rupp part numbers from manual OM-05142-02.
Spare Parts List
✓ Tick the parts you need. Codes are as printed in the Gorman-Rupp parts list; build variants and older serial numbers can use different parts, so pick your model in the form below. Not sure? Add a photo of the nameplate (model and serial number) and we’ll match the parts for you.
| Select | Part (as printed by Gorman-Rupp) | Part number & reference |
|---|---|---|
| Wear & Service Parts | ||
| Impeller | Part no. 10528 11010 · Item 1 | |
| Cartridge Seal Assy | Part no. 46513-150 · Item 2 | |
| /WWS Mech Seal Assy | Part no. 12364D | |
| Wear Plate Assy | Part no. 10532A 15990 · Item 22 | |
| 4'' Flap Valve Assy | Part no. 46411-062 · Item 39 | |
| Repair Rotating Assy (T4A3S-B /F /FM) | Part no. 44163-261 | |
| Repair Rotating Assy (T4A3S-B /WW) | Part no. 44163-305 | |
| Repair Rotating Assy (T4A3S-B /WWS) | Part no. 44163-276 | |
| Cover Plate Assy | Part no. 42111-344 · Item 10 | |
| Cover Gasket | Part no. 50G 19210 | |
| Impeller Adjusting Shim Set | Part no. 37J 17090 · Item 27 · Qty REF | |
| Cartridge Seal Assy (Stainless Steel Parts) (optional) | Part no. 46513-156 | |
| Mech Seal Assy (Stainless Steel Parts) (optional) | Part no. 46512-074 | |
| Metal Bellows Mech Seal Assy (Viton Or Equal) (optional) | Part no. 46512-147 | |
| Metal Bellows Mech Seal Assy (Kalrez) (optional) | Part no. 46512-142 | |
| Wear Plate (Self Cleaning) (optional) | Part no. 46451-763 24160 | |
| Wear Plate Assy (Stainless Steel) (optional) | Part no. 10532A 1718H | |
| Wear Plate Assy (Alloy Steel) (optional) | Part no. 46451-361 24160 | |
| Check Valve Assys (Viton Blow-out) (optional) | Part no. 46411-072 | |
| Check Valve Assys (Buna-n) (optional) | Part no. 46411-104 | |
| Shaft Sleeve (Mechanical Seal) (optional) | Part no. 11876A 1706H | |
| Aflas Seal (Mechanical Seal) (optional) | Part no. 46512-194 | |
| Seals, Bearings & Shaft | ||
| Gasket | Part no. 25113-034 · Item 3 | |
| O-Ring | Part no. S1674 · Item 15 · Qty 2 | |
| O-Ring | Part no. 25152-273 · Item 16 · Qty 2 | |
| O-Ring | Part no. S1472 · Item 25 | |
| Flange Gasket | Part no. 11389G 19370 · Item 40 | |
| Seal Plate | Part no. 38272-234 10010 · Item 3 | |
| Gasket | Part no. 10959G 20000 · Item 4 | |
| Oil Seal | Part no. S1352 · Item 5 | |
| Ball Bearing | Part no. S1088 · Item 6 | |
| Ball Bearing | Part no. S375 · Item 11 | |
| Gasket | Part no. 38683-271 18000 · Item 12 | |
| Impeller Shaft | Part no. 38514-817 16040 · Item 17 | |
| /WWS Impeller Shaft | Part no. 38514-819 1706H | |
| Shaft Sleeve O-Ring | Part no. 25154-022 · Item 26 · Qty REF | |
| Back Cover O-Rings (Aflas) (optional) | Part no. 25150-409 | |
| Back Cover O-Rings (Viton) (optional) | Part no. 25154-449 | |
| Seal Plate (Stainless Steel Parts) (optional) | Part no. 38272-234 1718H | |
| Other Core Parts | ||
| Discharge Flange (T4A3S-B) | Part no. 1756 10010 | |
| Discharge Flange (T4A3S-B /F) | Part no. 12066A 10010 | |
| Discharge Flange (T4A3S-B /FM) | Part no. 38642-211 10000 | |
| Back Cover Assembly | Part no. 42111-834 · Item 23 | |
| Inspect Cover Assy | Part no. 42111-451 · Item 26 | |
| Pressure Relief Valve | Part no. 26662-005 | |
| Suction Flange (T4A3S-B) | Part no. 11389 10010 | |
| Suction Flange (T4A3S-B /F /WW /WWS) | Part no. 12066 10010 | |
| Suction Flange (T4A3S-B /FM) | Part no. 38642-210 10000 | |
| Seal Cavity Sight Gauge | Part no. S1471 · Item 23 | |
| /F Flange Kit (optional) | Part no. 48213-039 | |
| Pressure Relief Valve (Stainless Steel) (optional) | Part no. 46431-803 | |
How we confirm the exact part: Part numbers on this page are as printed in Gorman-Rupp manual OM-05142-02, parts list for serial numbers 1708526 and up. Pumps with earlier serial numbers, an “N” serial suffix or a different build can use different parts, so send the serial number or a nameplate photo and we’ll confirm the right part before we quote.
Service Intervals & When to Replace
- Daily: check general condition (temperature, noise, vibration, leaks) and pump performance (gauges, speed, flow).
- Lubrication: check bearing and seal-cavity lubrication weekly; replace the oil annually (SAE No. 30 non-detergent oil where specified).
- Every six months: inspect front impeller clearance (wear plate) and rear clearance (seal plate) and adjust or replace worn parts.
- Annually: inspect the check valve, bearings, shaft deflection and pump-to-driver alignment; clean the pressure relief valve.
- New applications: inspect wearing parts after the first 250 hours to set your wear rate. Intervals assume about 4,000 hours a year of intermittent duty; shorten them for abrasive or continuous duty.
Models
Model code: T4A3S-B. Suffixes such as /F, /FM, /WW and /WWS mark build variants (for example flanged or metric-flanged ports) that change some parts, so check the full model code and serial number on the nameplate.
Models & Key Specifications
| Model | Series | Ports (suction x discharge) | Max solids | Seal (as listed) | Parts list |
|---|---|---|---|---|---|
| T4A3S-B | Super T Series | 4" (100 mm) | 3.00" (76 mm) | Cartridge Seal Assy | OM-05142-02 (S/N 1708526+) |
Port size and solids handling from Gorman-Rupp model data; parts from manual OM-05142-02. Typical uses: sewage lift stations, mine and quarry dewatering, stormwater and industrial effluent.
Troubleshooting
Pump fails to prime
Likely cause: Not enough liquid in the casing, a contaminated or damaged suction check valve, an air leak in the suction line, or a leaking or worn seal or gasket. Action: Fill the casing, clean or replace the check valve, correct leaks and check pump vacuum; replace a leaking or worn seal or gasket.
Low flow or pressure
Likely cause: Impeller or other wearing parts worn or damaged, impeller clogged, or suction lift too high. Action: Replace worn parts and check the impeller is centred and turns freely (adjust wear plate clearance); clear debris; reduce suction lift.
Pump clogs frequently
Likely cause: Discharge flow too slow, a clogged or binding check valve, or liquid too thick. Action: Open the discharge valve fully to raise the flow rate, clean the check valve, and dilute if possible.
Excessive noise
Likely cause: Cavitation, entrained air, loose mounting, or a clogged or damaged impeller. Action: Reduce suction lift and losses, remove the air source, secure the mounting, and clear or replace the impeller.
Bearings run too hot
Likely cause: Low or incorrect lubricant, unsupported piping or a misaligned drive. Action: Check lubricant type and level, support the piping and align the drive.
Request for Quotation
Selected Parts:
- No parts selected
Not sure which parts? Just send a photo of the nameplate or part below.
Gorman-Rupp T4A3S-B spare parts: frequently asked questions
Tap a question to see the answer.
What spare parts are listed for the Gorman-Rupp T4A3S-B?
The list covers the cartridge mechanical seal, pump repair kit, impeller, wear plate and impeller shaft, plus cover plate and rotating assembly O-rings, flange and seal plate gaskets, the check valve, ball bearings, oil seal, sight gauge and pipe plug.
Why won't my T4A3S-B prime?
The troubleshooting guide on this page lists a suction air leak, an unfilled pump casing or excessive suction lift as the likely causes. Check the cover plate O-ring for leaks and make sure the casing is filled with water before restarting.
How do I restore lost flow on a T4A3S-B?
Reduced flow usually means a clogged impeller, a worn wear plate or a blocked strainer. Clean the impeller, then adjust or replace the wear plate. The T4A3S-B has an external shimless adjustment, so the clearance can be reset without special tools.
How do I make sure I order the right T4A3S-B parts?
Tick the parts you need and your selection carries into the quote form. Add a nameplate photo or serial number and we'll confirm the parts before quoting. Running a larger Super T? See the T6A3S-B and T8A3S-B pages, or all Gorman-Rupp spare parts.