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Heavy Duty Diesel Crankshaft Dampers

Heavy Duty Diesel Engine Crankshaft Dampers or Vibration Dampers

The crankshaft damper is a vital component of your heavy duty diesel engine. This harmonic balancer is one of the most important pieces of equipment on your engine. Vibratech TVD is an American Company that has been producing American Made Torsional Viscous Vibration Dampers for over 65 years. These Vibratech TVD viscous torsional dampers are a free rotation inertia ring surrounded by a viscous silicone fluid enclosed in a precision machined steel housing that is laser welded. The entire liquid-filled crank damper assembly is computer balanced to ensure optimum performance of your heavy duty diesel engine. These performance diesel dampers work on stock and highly modified diesel engines. Original equipment dampers that utilize rubber or elastomer rings to dampen vibrations are prone to deterioration that may destroy engine components in as little as 1 to 3 years. Rubber damper rings dry out and cracks over time, reducing the effectiveness of the damper. Exposure to oils and solvents can cause rubber damper rings to swell and quickly break down. These changes in durometer, over time, will cause damper failure and damage to expensive engine components.

Crankshaft Damper For Heavy Duty Diesel Engines

Vibratech designs and manufactures high performance replacement engine dampers for:

Torsional Vibrations are the problem that must be controlled for long, trouble-free engine life.

Each time the air-fuel mixture inside a cylinder is ignited, the combustion that results creates a torque spike - an extremely rapid rise in-cylinder pressure. This pressure is applied to the top of the piston, which becomes the force transferred to the crankshaft through the connecting rod. Each torque spike is like a hammer blow. This energy hits with enough intensity that it not only causes the crankshaft to turn, but it also deflects or twists the crankshaft ahead of its rotation. This twisting acting and rebound is known as torsional vibration.

Your Heavy Duty Diesel Engine Vibration Damper is also referred to as a:

  • Harmonic Balancer
  • Vibration Damper
  • Crank Damper
  • Crankshaft Damper
  • Crank Shaft Damper
  • Engine Damper
  • Viscous Damper
  • Torsional Vibration Damper
  • Vibration Damper
  • Liquid Filled Damper

The destructive effects of torsional vibrations cause:

  • Crankshaft Cracking or Failure
  • Excessive Bearing Wear
  • Extreme Gear Wear or Failure
  • Broken Accessory Drives
  • Thrown or Slapping of Belts
  • Increased driver fatigue

Vibratech TVD's Viscous Torsional Vibration Damper

The Vibratech TVD viscous vibration damper is a simple design consisting of the precision-made free rotating inertia ring surrounded by a high viscosity silicone fluid enclosed in an entirely sealed leak-proof housing.

When torsional crankshaft vibrations occur, the outer housing of the damper reacts with the crankshaft, twisting while it rotates, while the inertia ring inside moves out of the phase with the housing. This relative motion between the inertia ring and the housing causes the inertia ring to shear the silicone fluid, which reduces the vibration.

Viscous Damper Inspection and Replacement

The nature of silicone fluid used within these viscous dampers results in a high rate of energy dissipation, which makes it an excellent damping medium. However, over extended periods of time in service under heavy duty operation, the damper will wear out. Your diesel engine's damper is a wear item that requires replacement at selected intervals. The dampers replacement is often overlooked. The failure to replace your engine's harmonic damper will make your inframe overhaul look cheap! 

A worn-out viscous damper or Harmonic Balancer leaves crankshaft torsional vibration unchecked and can cause costly engine damage. This scheduled replacement is why damper replacement is critical to long, trouble-free engine life. While recommended replacement intervals may vary, the average replacement interval is about 500,000 miles (15,000 hours) or at major engine overhauls and in-frame rebuilds, regardless of condition. We hear it far too often from owner-operators that have just endured a crankshaft failure because the damper was overlooked in the rebuild.

Warning signs your heavy duty diesel engine crankshaft damper needs replacement:

  • Bulged or Raised Cover (Protruding Sealant)
  • Heat build-up due to other components rubbing on the damper
  • Fluid leakage from damper around the cover seams or filler plugs
  • Failure or excessive wear of crank, bearings, or other rotating parts.
  • Thrown or slapping belts
  • The rattling sound coming from the damper
  • Dents or damage on the damper's exterior housing.

Why should I replace the crankshaft damper on my diesel engine?

Crankshaft damper replacement cost is a prime example of the wise old saying "Pennywise and Pound Foolish."
The cost incurred for an engine rebuild is estimated to be between fifteen and twenty-five thousand dollars. Mechanics often overlook the replacement of the crankshaft damper due to the expense of the rebuild. Your engine's vibration damper is a wear item that needs replacement at a prescribed service interval. Without a properly functioning crankshaft damper, the damaging torsional vibration produced by your engine is no longer controlled. Torsional vibrations are one of the leading causes of crankshaft failure. If you experience a crankshaft failure the cost of your engine, the overhaul is going to look cheap! The Vibratech crankshaft dampers are specially made to control the damaging torsional vibrations produced by your diesel engine. Look to Vibratech for a crank damper that controls vibrations and will allow you to drive for a longer period with less operator fatigue.

Please feel free to give us a call at 203-210-7200 or contact us if you have any questions regarding a replacement vibration damper for your motor.

All of these Vibratech Heavy Duty replacement crankshaft dampers are MADE IN THE USA!

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