flywheel with clutch disc MB Sprinter A6510300600

Mercedes-Benz Sprinter Dual-Mass Flywheel & Clutch Set

Part Number: A6510300600 (A 651 030 06 00)

Engine Code: OM651 (2.1L 4-Cylinder Diesel)

Chassis: W906, W907, W910

The A6510300600 is a genuine Mercedes-Benz Dual-Mass Flywheel (DMF) specifically engineered for the high-torque $OM651$ biturbo engine. This engine is the workhorse of the Sprinter line, and the DMF is a critical wear item designed to protect the manual transmission from the heavy torsional vibrations characteristic of diesel engines.

Technical Specifications

• Diameter: $240\text{ mm}$

• Teeth Count: 26 (Clutch disc spline)

• Mounting Bores: 8-Hole crankshaft pattern

• Transmission Type: Manual Transmission (6-Speed)

• Components usually included in a kit (e.g., LuK 600 0421 00):

  • Dual-Mass Flywheel (DMF)

  • Clutch Pressure Plate

  • Clutch Friction Disc

  • Central Slave Cylinder (CSC) / Release Bearing

  • Flywheel Bolt Set (Required for replacement)

Key Engineering Features

• Vibration Dampening: The DMF consists of two separate masses linked by powerful internal springs. This setup “splits” the engine’s resonance frequency, keeping it well below the operating RPM range to prevent gear rattle and drivetrain shudder.

• Torque Management: The $OM651$ engine produces high peak torque ($360\text{–}440\text{ Nm}$) at very low RPMs. This flywheel is designed to absorb these massive torque pulses to protect the gearbox input shaft.

• Self-Adjusting Clutch (SAC): Many kits for this part number feature SAC technology, which compensates for friction material wear. This maintains a consistent pedal feel throughout the life of the clutch.

Professional Installation & Diagnostic Notes

1. Flywheel Wear Inspection: Before replacement, check for the following “failure” signs:

   • Grease Leakage: Brown/black grease escaping the flywheel housing indicates internal spring failure.

   • Rocking Play: Excessive tilt between the primary and secondary mass.

   • Rotational Play: Free-play exceeding approx. $15\text{°}–20\text{°}$ (check specific manufacturer tolerances for LuK/Sachs).

2. Bolts are One-Time Use: The 8 mounting bolts for the flywheel are stretch bolts. Reusing old bolts can lead to them backing out or shearing, resulting in catastrophic engine/transmission damage.

3. Pilot Bearing: Ensure the pilot bearing (located in the center of the flywheel or crankshaft) is inspected. A seized pilot bearing will cause difficulty shifting into 1st or Reverse gear while stationary.

4. Cleaning: Always wipe the new friction surface with a brake cleaner before mounting the clutch disc. Even fingerprint oil can cause “clutch judder” during the break-in period.

5. Alignment: A 26-spline alignment tool is necessary to center the disc. If the disc is even slightly offset, the transmission input shaft will not slide in, and forcing it can bend the disc.

Inventory Tip: This is one of the most common high-value maintenance items for Sprinter fleets. If you are selling this as a kit, ensure the Central Slave Cylinder is included, as it is labor-intensive to replace later if it fails.