3936213 3281583 3934821 3945527 3976831 5259022 3973819 3349230 3934821 6754-61-4111 3937555 3936205 3917440 4063948 Engine V-ribbed Belt Tensioner Pulley For 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 ISLe engines. 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 ISLe

Application:

6CT / 6CT8.3: An inline 6-cylinder, 8.3L turbocharged ("T") C-series industrial/commercial vehicle engine, commonly found in medium and heavy-duty trucks, construction machinery (such as 335LC excavators and loaders), marine auxiliary machinery, generator sets, and fire/special vehicles. Power output ranges from approximately 195–260 hp (Euro III/Euro IV standards). Most use mechanical pumps or electronically controlled unit pumps (non-high-pressure common rail).

ISLe: Belongs to the IS (Interact System) series, an 8.9L engine with electronically controlled high-pressure common rail technology, designed specifically for heavy-duty highway trucks, city buses, coaches, and some off-road mobile machinery. Meets Euro III/Euro IV and higher emission standards, with typical power output of 270–400 hp. Emphasizing low-speed torque and emission compliance, it is not used for construction machinery or marine main propulsion.

Why Choose DDP Engine:
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.