3936213 3281583 3934821 3945527 3976831 5259022 3973819 3349230 3934821 6754-61-4111 3937555 3936205 3917440 4063948 Poulie de tension de la ceinture à côtes en V pour moteur 6CT 6CT8.3 ISLe

A belt tensioner is a device that applies a predetermined amount of tension to the engine's accessory drive belt (serpentine belt). Its primary function is to maintain constant, optimal tension on the belt as it wears and stretches over time. This prevents the belt from slipping, squealing, or throwing off, ensuring that critical components like the alternator, water pump, and A/C compressor operate reliably. This belt tensioner 3936213 3281583 3934821 3945527 3976831 5259022 3973819 3349230 3934821 6754-61-4111 3937555 3936205 3917440 4063948 is engineered for maximum durability and precise fitment in 6CT 6CT8.3 6BT Engine. Manufactured to meet or exceed OEM standards, it ensures optimal engine performance and a long service life under heavy-duty conditions.

Whether for full engine rebuilds or quick replacements, DDP Engine provides you with the most reliable parts at unbeatable wholesale prices.

Parameter Details
Product Name: Belt Tensioner
Part Number: 3936213 3281583 3934821 3945527 3976831 5259022 3973819 3349230 3934821 6754-61-4111 3937555 3936205 3917440 4063948

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: 6CT 6CT8.3 6BT

Application:

6CT (including variants such as 6CTA/6CTAA): Widely used in heavy-duty trucks, medium-duty trucks, heavy-duty pickups, construction machinery (power approximately 198–220 kW / 270–300 hp), marine auxiliary machinery (6CT8.3-GM series, 50–155 kW), and special vehicles (fire trucks, engineering vehicles).

ISC8.3 (Interact Series 8.3): Primarily used in heavy-duty trucks, commonly found in 230–292 hp models meeting China IV emission standards (e.g., ISC8.3-245E40A, -270E40A, -292E40A), suitable for 9–12 meter cargo trucks and tractors, often paired with a Fast 9-speed transmission.

QSC8.3 (Quik-Start/Commercial Series 8.3): Designed for fixed or mobile off-highway equipment such as construction machinery, ships, generator sets, fire trucks, and forklifts, it emphasizes high torque and low speed performance and is commonly found in excavators, cranes, generators, etc., and is not a mainstream truck power source. 

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100% Quality Guaranteed: All parts undergo rigorous testing to ensure perfect compatibility and premium performance.
Fast Worldwide Shipping: Large inventory in stock. Orders are typically processed within 3-7 working days with reliable global express and Transportation.
Professional Technical Support: Unsure about the part number? Contact our engineering team for exact cross-reference matching.
Flexible Solutions: Providing Genuine, OEM, and premium Aftermarket spare parts to fit your budget.