Peterbilt 378 Belts and Hoses

The Dayco Straight Radiator Hose is designed for a wide range of light and heavy duty truck applications where the radiator hose routing is relatively straight. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:

• Meets SAE J20R4, Class D-2 requirements
• Features a high strength knitted reinforcement and synthetic EPDM rubber construction
• Resistant to standard coolants, ozone and other detrimental environmental elements
• PLEASE NOTE: Priced and sold by inch. See store for details.

Specifically designed to carry the heated coolant from the engine block to the heater core under the dashboard and return it to the engine, this Dayco Standard Heater Hose is constructed using all EPDM compounds and spiral reinforcement for high burst strength and excellent heat resistance. Made for general service on light trucks and passenger cars, this hose is similar to SAE 20R3, Class D-2 and has a temperature rating of -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C). This Dayco Standard Heater Hose is compatible with all common coolant and coolant additives. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:

• Specifically designed to be compatible with all common coolants and coolant additives
• Constructed using all EPDM compounds and spiral reinforcements
• Similar to SAE 20R3, Class D-2
• Has a high burst strength and excellent heat resistance of -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C)
• PLEASE NOTE: Item is sold and priced by the foot. See store for details.

Gates is a global leader in Original Equipment (OE) System Design. With a full line of tensioners globally, you can count on Gates to supply premium quality DriveAlign Automatic Belt Tensioners you can depend on.

Product Features:

• Optimized components, designed to offer maximum strength and durability.
• Its patented design provides excellent belt alignment and tension, thus improving the life and efficiency of the transmission.
• Patented labyrinth seal prevents contamination of internal parts for maximum durability and service life
• Long-life steel pulleys with dust covers to protect internal bearings from contamination
• Double row bearings carry more load and last up to 3X longer than two individual bearings
• Chrome-silicone round torsion spring for less flex-fatigue than flat-spring designs
• Its patented damping mechanism provides maximum stability, reduces vibration, and extends the service life of the belt, tensioner, and other components of accessory belt drives.

This Heavy Duty Truck and Bus tensioner is designed and engineered by one of the world’s largest supplier of original equipment (O.E.) belt tensioners in the world. The Litens replacement part meets all form, fit, and performance characteristics of the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). This part is manufactured to meet or exceed the performance and life specifications of the O.E. part. The part features a premium chrome-silicon steel spring, internal damping, a “lift-lug” feature for ease of installation, Tandem 6303 ball bearings, a molded locator pin for precise installation, and a forged steel pulley. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

• Designed and engineered by one of the world’s largest Original Equipment suppliers of accessory drive tensioners and pulleys.
• Internal “round spring” technology to provide constant belt tension and alignment throughout its service life. The internal damping design provides quiet, smooth, system performance.
• Installation instructions included.
• Heavy Duty Electro-deposited coated (e-coat) Steel Pulley for superior corrosion resistance.
• Professional Mechanics will change this tensioner in approx. 1/2 hour
• Accessory drive belts and tensioners are manufactured with similar design life targets. Since belt removal is required to change the tensioner, replacing both will extend the system service life and lower labor costs versus individual replacement.

Designed for a wide range of light and heavy duty truck applications where the radiator hose routing is relatively straight, Dayco’s Straight Radiator Hose features knitted einforcement and synthetic EPDM rubber construction. It meets SAE J20R4, Class D-2 requirements and provides high strength and resistance to ozone and other detrimental environmental elements, coolants, and temperature variations from -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C). Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:

• Meets SAE J20R4, Class D-2 requirements
• Features a high strength knitted reinforcement and synthetic EPDM rubber construction
• Resistant to standard coolants, ozone and other detrimental environmental elements
• Works well in temperatures ranging from -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C)
• PLEASE NOTE: Priced and sold by inch. See store for details.

Designed for a wide range of light and heavy duty truck applications where the radiator hose routing is relatively straight, Dayco’s Straight Radiator Hose features knitted einforcement and synthetic EPDM rubber construction. It meets SAE J20R4, Class D-2 requirements and provides high strength and resistance to ozone and other detrimental environmental elements, coolants, and temperature variations from -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C). Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:

• Meets SAE J20R4, Class D-2 requirements
• Features a high strength knitted reinforcement and synthetic EPDM rubber construction
• Resistant to standard coolants, ozone and other detrimental environmental elements
• Works well in temperatures ranging from -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C)
• PLEASE NOTE: Priced and sold by inch. See store for details.

The Dayco Straight Radiator Hose is designed for a wide range of light and heavy duty truck applications where the radiator hose routing is relatively straight. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:

• Meets SAE J20R4, Class D-2 requirements
• Features a high strength knitted reinforcement and synthetic EPDM rubber construction
• Resistant to standard coolants, ozone and other detrimental environmental elements
• PLEASE NOTE: Priced and sold by inch. See store for details.

Gates Molded Coolant Hose is manufactured to fit specific applications. Similar to OEM specifications. Approved for marine applications.

Product Features:

• The specially designed materials resist collapse under vacuum.
• Engineered to resist electrochemical degradation, the leading cause of hose failure
• Pre-formed for a good fit and to ensure perfectly sealed connections
• EPDM tube; reinforced with knitted synthetic fibers; EPDM lid resistant to heat, ozone, and chemical refrigerants
• It meets the requirements of SAE 20R4, class D2 and DIN 73411, class A (except for tolerances)
• temperature range Deg. F to +257 degrees F (-40 degrees C to +125 degrees C)
• Note: Gates recommends replacing the clamps and connectors each time a new radiator hose is installed.
• Caution: Do not use for fuel or oil transfer applications

Constructed with aramid reinforced EPDM compounds, the Dayco poly-V serpentine belt delivers  more than just OE quality. Developed through extensive laboratory and road testing, the rib profile in this EPDM belt has been engineered to conform to high mile

Product Features:

• Provides full coverage for today’s light-duty vehicle market, especially vehicles with troublesome drives
• Engineered to help address noise issues caused by the belt drive 
• Capable of handling more extreme temperatures and workloads

Replacement belt for the most demanding engine drives. Due to thermal forces, this variable notched belt actually tightens on the drive as it gets hot. This results in improved belt performance by reducing tension decay and noise.

Product Features:

• The fiber-reinforced rubber adds flexibility along the entire length of the belt and ensures greater lateral stability in the pulley.
• The shape is rectified to ensure precise dimensional control of the top width and side wall for a proper fit to the pulley.
• Thermoactive traction ropes for maintenance-free performance when properly installed and tensioned
• It resists oil, heat, ozone, weather, and decay to improve belt life.
• Meets or exceeds SAE J636C specifications

The Dayco curved radiator hose features knitted reinforcement, a protective sleeve and a synthetic EPDM rubber construction for high-strength performance, protection against abrasion and resistance to oil, mud, salt, road debris, ozone and coolants. It can also withstand temperature variations of -40 Deg. F (-40 Deg. C) to +257 Deg. F (+125 Deg. C). The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose.

Product Features:

• Meets SAE J20R4, Class D-1 requirements
• Meets Type EC electro-chemical requirements as specified in SAE J1684, which prevents inner tube deterioration caused by the build-up of static electric charges
• Provides excellent protection against external elements

The Dayco curved radiator hose features knitted reinforcement, a protective sleeve and a synthetic EPDM rubber construction for high-strength performance, protection against abrasion and resistance to oil, mud, salt, road debris, ozone and coolants. It can also withstand temperature variations of -40 Deg. F (-40 Deg. C) to +257 Deg. F (+125 Deg. C). The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose.

Product Features:

• Meets SAE J20R4, Class D-1 requirements
• Meets Type EC electro-chemical requirements as specified in SAE J1684, which prevents inner tube deterioration caused by the build-up of static electric charges
• Provides excellent protection against external elements

Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.

Product Features:

• Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
• Premium OE technology to ensure peak performance under extreme conditions
• Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
• Meets or exceeds OE quality

This pulley is designed and engineered by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications and as the pulley component on automatic tensioner applications. This pulley conforms to original equipment material, tolerances, and specifications. The part is made using the O.E. specified design and meets all performance and durability requirements. Heavy duty steel construction for long life and trouble-free performance. Designed for HD truck applications. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

• Manufactured by one of the largest original equipment part suppliers in the world to ensure proper form, fit, and performance.
• Forged Heavy Duty Steel Pulley designed to displace bearing heat. Precision machined face for smooth running surface. Tandem 6303 Ball Bearings for extended life.
• Installation instructions included.

Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.

Product Features:

• Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
• Premium OE technology to ensure peak performance under extreme conditions
• Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
• Meets or exceeds OE quality

Gates is a leading manufacturer of Original Equipment (OE) idler pulleys. Gates DriveAlign(R) Idler Pulleys meet or exceed OE specifications. High quality, high strength bearings run cooler and last longer than original bearings. DriveAlign Idler Pulleys are built to last by resisting dirt, salt, and other under-hood contaminants. Designed for use on automobiles and light trucks as locked center tensioning, automatic belt tensioning and idler pulleys.

Product Features:

• Constructed from steel and thermoplastic designed to strict manufacturing tolerances for high durability and quality performance.
• Built to last with a superior resistance to dirt, salt, chemicals and other under-hood contaminants
• Original equipment quality suitable for virtually all domestic or imported vehicles in the current vehicle fleet
• Bearings meet or exceed OE standards with application-specific speed and load requirements, to withstand high under hood temperatures
• Premium bearings eliminate bearing noise
• Mounting hardware included for some common applications
• Reliable operation under severe conditions

Gates Fleet Runner Micro-V Belts are designed for the toughest applications. Fleet Runner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. Fleet Runner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.

Product Features:

• The patented material provides maximum performance at extreme and prolonged operating temperatures.
• The construction resists cracking and wear, even at extreme temperatures.
• Special compound provides unmatched flexibility, stability, load carrying capacity and belt life
• Problem solver designed for the toughest applications
• Consistently outperforms other heavy-duty serpentine belts on the market
• Designed to save your fleet money and reduce downtime
• Tensioner Replacement is Recommended (if equipped)

Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:

• Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
• EPDM rubber constructions resist cracking on the rib surface
• Meets or exceeds all original equipment manufacturer specifications
• Tensioner Replacement is Recommended (if equipped)
• Unique form grinding of each individual belt assures precise dimensional control.
• Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.

Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.

Product Features:

• Engineered to handle operating conditions with temperatures up to 130°C (266°F)
• Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
• Capable of delivering excellent performance in high torque and high power pulse applications
• Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt

The Dayco curved radiator hose features knitted reinforcement, a protective sleeve and a synthetic EPDM rubber construction for high-strength performance, protection against abrasion and resistance to oil, mud, salt, road debris, ozone and coolants. It can also withstand temperature variations of -40 Deg. F (-40 Deg. C) to +257 Deg. F (+125 Deg. C). The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose.

Product Features:

• Meets SAE J20R4, Class D-1 requirements
• Meets Type EC electro-chemical requirements as specified in SAE J1684, which prevents inner tube deterioration caused by the build-up of static electric charges
• Provides excellent protection against external elements

The Dayco curved radiator hose features knitted reinforcement, a protective sleeve and a synthetic EPDM rubber construction for high-strength performance, protection against abrasion and resistance to oil, mud, salt, road debris, ozone and coolants. It can also withstand temperature variations of -40 Deg. F (-40 Deg. C) to +257 Deg. F (+125 Deg. C). The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose.

Product Features:

• Meets SAE J20R4, Class D-1 requirements
• Meets Type EC electro-chemical requirements as specified in SAE J1684, which prevents inner tube deterioration caused by the build-up of static electric charges
• Provides excellent protection against external elements

Designed for a wide range of light and heavy duty truck applications where the radiator hose routing is relatively straight, Dayco’s Straight Radiator Hose features knitted einforcement and synthetic EPDM rubber construction. It meets SAE J20R4, Class D-2 requirements and provides high strength and resistance to ozone and other detrimental environmental elements, coolants, and temperature variations from -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C). Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:

• Meets SAE J20R4, Class D-2 requirements
• Features a high strength knitted reinforcement and synthetic EPDM rubber construction
• Resistant to standard coolants, ozone and other detrimental environmental elements
• Works well in temperatures ranging from -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C)
• PLEASE NOTE: Priced and sold by inch. See store for details.

Gates is a leading manufacturer of Original Equipment (OE) idler pulleys. Gates DriveAlign(R) Idler Pulleys meet or exceed OE specifications. High quality, high strength bearings run cooler and last longer than original bearings. DriveAlign Idler Pulleys are built to last by resisting dirt, salt, and other under-hood contaminants. Designed for use on automobiles and light trucks as locked center tensioning, automatic belt tensioning and idler pulleys.

Product Features:

• Steel and thermoplastic construction designed with tight manufacturing tolerances to deliver great durability and quality performance
• Built to last with a superior resistance to dirt, salt, chemicals and other under-hood contaminants
• Original equipment quality suitable for virtually all domestic or imported vehicles in the current vehicle fleet
• The bearings meet or exceed Original Equipment standards with application-specific speed and load requirements, to withstand high temperatures under the bell housing
• High-quality bearings eliminate noise
• Mounting hardware included for some popular applications
• Reliable operation under severe conditions

Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.

Product Features:

• Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
• Premium OE technology to ensure peak performance under extreme conditions
• Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
• Meets or exceeds OE quality

This pulley is supplied by Litens Automotive – inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications and as the pulley component on automatic tensioner applications. This pulley conforms to original equipment material, tolerances, and specifications. The part meets all performance and durability requirements. Fits Heavy Duty truck applications including Freightliner Columbia. Comes complete with new bolt, washer/dust cover, and spacer. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

• Manufactured by the world’s largest Original Equipment supplier of accessory drive tensioners and pulleys.
• Heavy Duty Steel Pulley for Freightliner Trucks
• Pre-assembled pulleys save installation time and ensure that all components are assembled to original specifications for both installation and performance