3102889 3072977 3401041 89434 Engine V-ribbed Belt Tensioner Pulley For QSM11

Product Specification

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 3102889 3072977 3401041 89434 is engineered for maximum durability and precise fitment in QSM11 ISM11 M11 LT10 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: 3102889 3072977 3401041 89434

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: QSM11 ISM11 M11 LT10

Application:

QSM11: Fully electronically controlled diesel engine for off-highway use, with a power output of 290–420 hp. Used in construction machinery (such as rotary drilling rigs, mining trucks, port reach stackers, crawler/truck cranes, and railcars) and some generator sets, meeting Tier 3/China III emission standards (some models may be upgraded to China V later).

ISM11: Fully electronically controlled diesel engine for highway heavy-duty trucks, with a power output of 308–440 hp. Primarily used in tractors, dump trucks, and cargo trucks, meeting China IV/China V (ISM11E4/E5) emission standards, emphasizing low-speed high torque and fleet operational economy. M11: Early mechanical/electronically controlled highway/industrial engine (those not labeled "M11" are independent models, actually the predecessor or basic platform of the ISM11), with a power output of 350–435 horsepower. It was used in heavy trucks, ships, power generation, and mining equipment, mostly meeting China II/China III emission standards. Production has largely ceased, replaced by the ISM11/QSM11; some older models were used in road rollers, bulldozers, and other heavy machinery.

LT10: L10, a 10.8L highway engine with a power output of 350–400 horsepower, used in heavy trucks and buses. Production has ceased.

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