5288650 Alternator for Cummins 4BT 6BT ISLe 6CT

The Cummins alternator #5288650 is designed for multiple Cummins diesel engines, including the 4BT, 6BT, ISLe, and 6CT series. Below is a detailed breakdown of its compatibility, specifications, and alternatives if needed:

1. Compatibility & Applications

✅ Fits:

• Cummins 4BT (3.9L) – Industrial, agricultural, and small equipment

• Cummins 6BT (5.9L) – Found in Dodge Ram 2500/3500 (1989–1998 12V models)

• Cummins ISLe (8.9L) – Used in buses and medium-duty trucks

• Cummins 6CT (8.3L) – Industrial and marine applications

❌ Does NOT Fit:

• 1998.5–2023 Dodge Ram 5.9L/6.7L (ISB engines) – Different mounting and electrical specs

• 2019+ Ram HD with high-output 6.7L – Requires a higher-amp alternator

2. Key Specifications

• Voltage: 12V or 24V (confirm your system before purchase)

• Amperage: Typically 65A–160A (varies by application)

• Mounting: Pad-mounted (J180 bracket) – Common for industrial Cummins engines

• Pulley Type: Single-groove or dual-groove (check your belt setup)

3. Will It Work on a Dodge Ram?

• ✔️ Fits 1989–1998 Dodge Ram with 5.9L 12V Cummins (6BT)

  • Verify pulley alignment and amperage needs (stock was ~160A).

• ❌ Does NOT fit 1998.5+ Ram (24V ISB or 6.7L)

  • Later Rams use a different plug & mounting style.

4. Alternatives for Dodge Rams

If you need an alternator for a post-1998 Ram Cummins, use:

• 1998.5–2007 (5.9L ISB): Cummins #4027035 (160A)

• 2007.5–2018 (6.7L ISB): Cummins #5277968 (220A)

• 2019+ (6.7L HO): Cummins #68516777 (240A)

5. Installation Notes

• Check wiring harness compatibility – Some industrial alternators have different plugs.

• Upgrade for high electrical loads? Consider a 200A+ aftermarket alternator if running accessories.

Final Verdict

✅ #5288650 fits 1989–1998 Dodge Ram 5.9L (6BT) and industrial Cummins engines.
🔧 For later Rams, use ISB-specific alternators.

Need help confirming your exact model? Let me know your engine/year!