Ensure consistent electrical performance in your truck with the Fortpro F235390 double-groove V-belt alternator pulley. An exact replacement for Delco 830279, this 3-1/4 in. (85 mm) outer diameter pulley is made of cold-rolled steel for maximum durability against wear. Replacement for Delco Remy 20SI to 34SI series alternators and compatible with Cummins, Detroit Diesel, and Mack engines, it prevents belt slippage and ensures reliable power transmission.
Fortpro is a trusted leader in the development and manufacturing of premium-quality truck parts designed to meet the demands of semi-trucks and heavy-duty trucks. Renowned for innovation, durability, and reliability, Fortpro products are engineered to enhance performance, safety, and efficiency across a wide range of trucking applications.
Whether you're seeking OEM replacement parts or upgrades, Fortpro provides a diverse selection of components backed by a global reputation for quality and innovation. Trust Fortpro for the parts you need to keep your vehicles on the road longer and stronger.
Basic Part Information5 attributes
| Product Line | Engine Parts |
|---|---|
| Category Name | Alternators |
| Part Type | Pulley |
| Alternate Part Name | 2-Groove Pulley, Standard Alternator Pulley |
| OEM Part Number | 830279 |
Application/Fitment Attributes3 attributes
| Application Type | Heavy Duty Trucks, Semi-Trucks |
|---|---|
| Compatible Belt Type | Double V-Belt |
| Outside Diameter (O.D.) | 85 mm (3.25 in.) |
Dimensional/Physical Attributes4 attributes
| Material | Cold Rolled Steel |
|---|---|
| Inside Diameter (ID) | 22.2 mm (0.874 in.) |
| Pulley Groove Qty | 2 |
| Width | 12.70 mm |
Packaging / Logistics Attributes:1 attribute
| Net Weight | 2.88 lb. |
|---|
Intended Application
- Compatible with Delco Remy 20SI, 21SI, 30SI, 33SI, and 34SI series alternators installed in engines and heavy industry. Functions as a double V-groove alternator pulley with a 3-1/4 inch (85 mm / 3.25 in.) OD and a 0.87 inch (7/8 in.) ID shaft/inner diameter. It efficiently transmits torque from the engine belts to the alternator rotor for continuous electrical power generation.
- Always compare with your OEM part number prior to purchase to confirm full compatibility.
- Delco:: Compatible with Delco 21SI, 22SI, 25SI, 26SI, 30SI, 33SI, 34SI Series IR/EF Alternators
