Gorman-Rupp 13A20-B 10 Series Pump
Spare Parts for the Gorman-Rupp 13A20-B Self-priming centrifugal pump
Product Summary
Genuine OEM spare parts for the Gorman-Rupp 13A20-B, a self-priming centrifugal pump for clean or lightly contaminated liquids. Impellers, seals, wear parts, check valves and bearings are listed below with Gorman-Rupp part numbers from manual OM-00632-04.
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. 2996C 11010 · Item 2 | |
| Seal Assy | Part no. 46512-160 · Item 3 | |
| Shaft Sleeve | Part no. 12449 16000 · Item 11 | |
| Wear Plate Assy | Part no. 2634A 15990 · Item 34 | |
| Flap Valve Assy | Part no. 1348 · Item 52 | |
| Flap Valve Gasket | Part no. 1348G 19070 · Item 53 | |
| Casing Gasket Set | Part no. 48211-094 · Item 32 | |
| Back Cover Gasket | Part no. 2985G 19090 · Item 40 | |
| Impeller Adjusting Shim Set | Part no. 2X 17090 · Item 33 · Qty REF | |
| Seals, Bearings & Shaft | ||
| Bearing Adj Shim Set | Part no. 48261-009 · Item 25 | |
| Seal Plate | Part no. 38272-366 10000 · Item 9 | |
| Oil Seal | Part no. 25223-010 · Item 10 | |
| Oil Seal | Part no. 25223-009 · Item 13 | |
| Ball Bearing | Part no. 23275-008 · Item 14 | |
| O-Ring | Part no. 25152-235 · Item 18 | |
| Oil Seal | Part no. 25223-008 · Item 21 | |
| Impeller Shaft | Part no. 38514-549 15010 · Item 23 | |
| Other Core Parts | ||
| Sight Gauge | Part no. 26714-006 · Item 27 | |
| Suction Flange | Part no. 2943 10010 · Item 59 | |
| Flange (Flanged Suction) (optional) | Part no. 1753A 10010 | |
How we confirm the exact part: Part numbers on this page are as printed in Gorman-Rupp manual OM-00632-04, parts list for serial numbers 1899670 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: 13A20-B. 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 |
|---|---|---|---|---|---|
| 13A20-B | 10 Series | 3" (80 mm) | 1.50" (38 mm) | Seal Assy | OM-00632-04 (S/N 1899670+) |
Port size and solids handling from Gorman-Rupp model data; parts from manual OM-00632-04. Typical uses: water transfer, washdown, irrigation and general industrial service.
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:
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Not sure which parts? Just send a photo of the nameplate or part below.
Gorman-Rupp 13A20-B spare parts: frequently asked questions
Tap a question to see the answer.
What spare parts are listed for the Gorman-Rupp 13A20-B?
Parts come from Gorman-Rupp manual OM-00632-04, grouped as wear and service parts; seals, bearings and shaft; and other core parts. They include the impeller, seal assembly, shaft sleeve, wear plate assembly, flap valve assembly and flap valve gasket, each listed with its Gorman-Rupp part number as printed.
Why won’t my 13A20-B prime?
Likely causes from the troubleshooting guide: 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. The fixes are in the troubleshooting table above.
How do I restore lost flow or pressure on a 13A20-B?
The troubleshooting guide on this page lists the likely causes as: impeller or other wearing parts worn or damaged, impeller clogged, or suction lift too high. Replace worn parts and check the impeller is centred and turns freely (adjust wear plate clearance); clear debris; reduce suction lift.
How do I make sure I order the right 13A20-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. See other models in our 10 Series parts, or all Gorman-Rupp spare parts.