Medium and Heavy Duty Aftermarket

Heavy Duty Poly-V / Serpentine Belt Kits

Quality requirements of maintenance activities on auxiliary and drive controls do not require single items anymore, rather complete systems allowing the installation technician to guarantee reliable replacement operations.

Our continuous research in cooperation with all automotive companies allowed us to realease complete systems that can satisfy all technical and application needs. Our program can achieve differentiated selections for the same application, from those envisaged by the manufacturer to the most complete ones.

The wide range of Dayco Poly-V / Serpentine kits to control the auxiliary components providing simple solutions for a continuously developing market.

Our offer includes over 130 kits.
Our wide range of product guarantees complete systems and the perfect technical compatibility of top quality components.

Dayco kits offer:

  • Genuine or OEM quality components
  • Complete replacement of all wear parts (belts, metal parts)
  • Continuous update of components according to the instructions of the car manufacturer
  • Assembly instructions

We recommend to always check and replace, whenever necessary, all drive components, for the best maintenance activity.

It is advised to always check and, if necessary, replace any component related to the transmission, to guarantee the best maintenance operation.

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Heavy Duty Poly-V / Serpentine Belts

Heavy Duty Poly-V / Serpentine belts are produced for heavy duty vehicles and buses. With multiple accessories (air conditioning, power steering pumps, alternators, water pumps, vacuum pumps, etc.) and operating conditions with temperatures up to 130° C/266° F have made it essential to upgrade the materials and construction technology.

Heavy Duty Poly-V / Serpentine belts are all made of EPDM (Ethylene-Propylene-Diene-Monomers) material and are compliant with the latest standards required by the automotive industry, guaranteeing resistance, reliability, low noise and a longer service life.

The main features are:

  • High bending flexibility for use on small diameter pulleys
  • Enginereed with power transmission on both sides of the belts, as per the “DPK” (Double Poly-V)
  • Resistance to high operating temperatures for a longer service life
  • Adapting to the demands of the automotive sector, Dayco has developed the latest generation of Poly-V / Poly-V serpentine belts for the aftermarket, capable of handling high workloads, while maintaining constant high performance.

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Heavy Duty V-Belts

Designed for efficient power transmission to the vehicle accessory, Dayco has combined raw-edge construction with Dayco’s patented top cogged design to ensure the top performance on vehicles and drives that still utilize HD V-belts. HD V-Belt delivers more flexibility and increases airflow around the belt so it runs cooler and lasts longer. Three plies of neoprene impregnated fabric resist heat, oil and grease while a specially-formulated treatment of the polyester cord provides the strength, stability and reliability that are required from one of the most innovative, top-performing HD V-belts for nearly 30 years.

HD V-belts are available in different sections (AV10 – AV13 – AV17 types) and guarantee:

  • Excellent resistance to repeated flexing
  • Low weight
  • Use on small diameter pulleys
  • High transmission ratios
  • Greater friction, less slippage
  • Energy saving
  • Longer belt life
  • Good resistance to heat
  • High friction coefficient
  • Good resistance to oils, greases, chemicals, ozone

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Raw Edge V-Belts Agricultural Applications

High performance indented raw edge V-belt

Available in the following types: AV10 – AV11 – AV13. Made with high quality material that provide:

  • Optimal resistance to repeated flexions
  • Reduced weight
  • Use of small diameter pulleys
  • High transmission ratios
  • Higher friction, reduced slipping
  • Energy saving
  • Longer life of the belts
  • High resistance to heat
  • High friction coefficient
  • Good resistance to oil, grease, chemical agents, ozone

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Heavy Duty Water Pumps

Water pumps are an integral part of many primary drive systems and the latest designs contribute to today’s low friction “Green” primary drive system requirements.

Dayco water pumps are designed to meet OE specifications. From raw material to complete assembly, all quality elements are controlled in-house. Each water pump is assembled using programmable Logic Control (PLC), providing quality data during the manufacturing process.

Additionally, each water pump features 100% new aluminum cast material and follows TS16949 quality standards:

  • Low friction seals
  • Manufactured with the same high standards of Dayco OE components
  • Developed for each individual application
  • Case-hardened roller bearing with a tough exterior and interior that allows for flex without breaking
  • Improved impeller design for better performance and die-cast aluminum material for better durability and increased longevity
  • Each pump is 100% end of line leak tested to ensure better durability

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Heavy Duty Vibration Dampers

The vibration damper is a device that absorbs the vibrations generated by the driving shaft. It is widely used in motorcars to prevent any discomfort, damage and failure due to vibrations.

It usually serves as a guide pulley for Poly-V belts and to strengthen the auxiliary components (water pump, power steering, compressor, etc.).

The damper should be replaced when the rubber absorbing element is too worn to reduce the vibrations. It is recommended to check the damper rubber ring for rigidity (check that the rubber aging does not cause excessive hardening, crystallization or cracks).

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Heavy Duty Poly-V / Serpentine Belt Drive Components

The increase in engine performance and the continuous increase in accessory components have been considered during the design development and choice of materials used for all belt drive components.

The control components for accessory devices, with both fixed and automatic tensioning, must meet the growing needs of the manufacturers:

  • Increasingly reduced workspaces
  • High temperatures
  • Continuous stress
  • Increase in the component replacement interval

It follows that both tensioners and pulleys/belts of the system must meet extremely high quality standards.

Tensioners:

As the major supplier to heavy duty original equipment manufacturers, Dayco Heavy Duty Tensioners are guaranteed to be engineered and manufactured to the strictest design specifications. Designed for heavy duty diesel engine accessory drive applications, the heavy duty cast aluminum body and pulley arms translate into extra strength and durability.

The Dayco heavy duty tensioner features multiple patented components that are engineered to handle the higher torque and power pulses exerted by today’s diesel engines. Rugged pulleys with dual permanently lubricated bearings deliver long lasting, dependable service. In addition, many of Dayco heavy duty tensioners feature highly damped designs using a wave spring and a metal ring with a bonded polymeric surface to act as a radial shock absorber for the tensioner arm while reducing contamination.

Pulleys:

The performance demands of original equipment manufacturers of over-the-road trucking and off-road equipment requires a built-for-punishment heavy duty construction.

Designed to replace idler and tensioner pulleys for serpentine drives in heavy duty diesel engine applications, Heavy Duty Pulleys are manufactured from steel, powdered metal, or engineered polymer materials to resist wear under harsh environments. Each heavy duty pulley from Dayco features dual permanently lubricated sealed bearings and retainers to provide long life despite the shock loads experienced in diesel engine applications.

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Stretchy Belt Removal / Fitting Tools
  • Universal Tool
  • 2 tools in one
  • Quick and simple to use
  • One tool used for removal, one tool used for fitting
  • Always turn engine in normal direction of rotation
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