5333485 3976627 Engine V-ribbed Belt Tensioner Pulley For QSL9

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 5333485 3976627 is engineered for maximum durability and precise fitment in QSL9 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: 5333485 3976627

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: QSL9

Application:

The QSL9 engine (9.3L inline six-cylinder turbocharged intercooled electronically controlled diesel engine) is mainly used in construction machinery, generator sets, and some special vehicles. Common power outputs range from 162–280 kW (220–380 hp), meeting the China III emission standard for non-road applications.

Rotary drilling rigs: such as the ZR220B (252 kW) and ZR250B (252 kW), serving as the main power source, matched with a rated speed of 2000 rpm.

Crawler/truck cranes: such as the YTQU80 (QSL9-280, 209 kW), used for driving the slewing and lifting hydraulic systems.

Milling machines, graders, loaders, bulldozers: Some medium and large models use the QSL9 (power output mostly in the 180–220 kW range). Generator sets: Used as stationary or vehicle-mounted emergency power supplies, commonly configured with 2200 rpm, 180–245 kW output (50/60 Hz).

Fire trucks, rescue vehicles, and aerial work platforms: Some heavy-duty special chassis utilize the QSL9, balancing high torque and reliable cold start (proven at -36℃).

Mining equipment/railcars/fracturing trucks: Used in a few high-power-demand off-highway equipment, but this is not a mainstream configuration (more often replaced by QSK15/X15).

Why Choose DDP Engine:
100% Quality Guaranteed: All parts undergo rigorous testing to ensure perfect compatibility and premium performance.
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