🔴 3258 US Motors Circulator Pump Motor – 1/2 HP, 1725 RPM, 115/208-230V, 56YZ
The 3258 Circulator Pump Motor from U.S. Motors is a premium hot water boiler and booster pump replacement motor, engineered to match OEM mechanical fit and performance. Featuring a red enamel finish for hot water applications, this motor delivers quiet operation, dependable torque, and long service life in demanding hydronic systems.
It is a direct replacement for several OEM motors, restoring proper circulation when the original motor has failed or is no longer operating efficiently.
Direct replacement for Armstrong 811757-001, Bell & Gossett 111044 & 169228, and Rotom CP-R1459
✅ Key Features
🟢 1/2 HP motor output – ideal for hydronic circulation systems
🟢 1725 RPM speed for consistent pump performance
🟢 Dual voltage operation (115 / 208-230V)
🟢 56YZ frame, ODP enclosure – OEM-style mounting
🟢 Reversible rotation for installation flexibility
🟢 Automatic reset thermal overload protection
🟢 Sleeve bearings with all-angle thrust system
🟢 Special balance design for quiet, low-vibration operation
🟢 Red paint finish identifies hot water boiler usage
🟢 Matches OEM electrical and mechanical specifications
📊 Specifications Table
| Specification | Details |
|---|
| Catalog / Part Number |
3258 |
| Model Number |
T55CXTHJ-1232 |
| Horsepower |
1/2 HP |
| Speed |
1725 RPM |
| Voltage |
115 / 208-230 VAC |
| Phase / Frequency |
Single-phase / 60 Hz |
| Full Load Amps |
5.7A (115V) / 2.9–3.0A (208–230V) |
| Frame |
56YZ |
| Enclosure |
Open Drip-Proof (ODP) |
| Rotation |
Reversible |
| Bolt Circle |
~5.86" (5-7/8") |
| Shaft Size |
~5/8" diameter × ~1-1/4" length |
| Bearings |
Sleeve bearings, all-angle thrust |
| Insulation Class |
Class B |
| Ambient Rating |
40°C / 104°F |
| Thermal Protection |
Automatic reset |
| Finish |
Red (hot water rated) |
🔁 Cross Reference Table
| Brand | Part Number |
|---|
| Armstrong Pumps |
811757-001 |
| Bell & Gossett |
111044 |
| Bell & Gossett |
169228 |
| Rotom |
CP-R1459 |
⚠️ Common Symptoms This Motor Fixes
-
Circulator pump will not start
-
Motor hums but does not turn
-
Overheating or thermal overload trips
-
Loud or excessive vibration
-
Reduced water flow or uneven heating
-
Intermittent pump operation
❓ Frequently Asked Questions (FAQ)
Q: Is this a direct OEM replacement motor?
A: Yes. The 3258 is engineered to match OEM shaft size, bolt pattern, voltage options, and performance of the listed replacements.
Q: Can this motor be wired for different voltages?
A: Yes. It supports 115V and 208-230V single-phase operation.
Q: Is this motor designed for hot water systems?
A: Yes. The red enamel finish, Class B insulation, and ambient rating make it suitable for hot water boiler applications.
Q: Does it include overload protection?
A: Yes. The motor includes an automatic reset thermal overload protector.
Q: Can rotation be changed if needed?
A: Yes. Rotation is reversible to match pump requirements during installation.
🧭 Shopping Tips
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✔️ Verify frame size (56YZ) and shaft dimensions before ordering
-
✔️ Confirm available supply voltage at the job site
-
✔️ Designed for hot water circulator and booster pumps
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✔️ Match horsepower and RPM to the original motor
-
✔️ Professional installation recommended for wiring and alignment
