5256984 Starter for Cummins ISLe 6CT8.3 Replace No. 5293644

The Cummins 5256984 Starter is a heavy-duty OEM replacement for the ISLe 6.7L and 6CT8.3Lengines, superseding the older 5293644. Here are the key technical details:

Core Specifications

1. Voltage: 24V (for commercial/heavy-duty applications)

2. Power: 5.5 kW (7.4 HP)

3. Teeth: 11-tooth pinion (matches Cummins flywheel)

4. Rotation: Clockwise (viewed from pinion end)

5. Mount Type: Direct flange-mount (3-bolt pattern)

Compatibility

✔ Fits:

• ISLe 6.7L (2004–2018, Euro III/IV)

• 6CT8.3L (Industrial/Marine)

• Replaces 5293644 (older 4.5kW design)

❌ Not For:

• 12V systems (use 4903449)

• QSB6.7 (different mounting)

Installation Notes

1. Torque:

   • Mounting bolts: 61 Nm (45 lb-ft)

   • Terminal nuts: 15 Nm (11 lb-ft)

2. Critical Checks:

   • Verify 0.5–1.5mm pinion-to-flywheel gap

   • Inspect bendix gear for wear before installation

3. Electrical:

   • Requires 70A+ relay for solenoid circuit

Cross-Reference

Failure Signs

⚠ Replace If:

• Grinding noise during engagement

• Intermittent cranking (solenoid issues)

• Voltage drop >1.5V during cranking

Maintenance Tip

• Bench-test before installation:

  • Confirm ≥280 RPM no-load speed at 24V

  • Solenoid should engage within 0.3 sec