Retarder
An intarder is a hydraulic braking system that functions as an auxiliary retarder. It reduces the load on the main brakes and improves safety during long descents and heavy-duty operations.
The intarder is a wear-free hydraulic brake integrated into or mounted on the transmission. It activates during engine braking — especially on downhill slopes or when sustained deceleration is needed — converting kinetic energy into heat through oil pressure or turbine resistance, without using the service brakes.
In trucks, buses, and other heavy-duty vehicles, the intarder provides crucial braking support. It significantly extends the lifespan of brake discs and pads by reducing wear and overheating, while ensuring consistent stopping power in demanding conditions. This translates to lower maintenance costs and improved vehicle uptime.
A malfunctioning or weak intarder can lead to brake fade and increased strain on the service braking system. At Sanders Parts, you’ll find complete intarder units as well as spare parts such as coolers, seals, valves and control modules — compatible with a wide range of brands and configurations.
Key features and uses:
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Hydraulic retarder for heavy-duty commercial vehicles
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Provides wear-free braking, reduces load on main brakes
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Ideal for long downhill drives or continuous braking
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Available as full assemblies or individual components
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Improves safety, reduces wear and maintenance costs
At Sanders Parts, we supply premium-quality intarders built for reliable performance — so you can brake safely, no matter the load or road ahead.