Oesse Hydraulic Oil Coolers

Compact, high-efficiency air-oil coolers engineered for mobile duty. Sized by kW/°C, built to run cool under load.

Keep Your Oil Cool, Keep Your Uptime High.

Oesse HL air–oil coolers pair compact cores with 12/24 V fans. Sized by kW/°C so you can spec fast and run cooler, longer.

kW/°C SizingPick by required slope—no guesswork on hot days.

Fast InstallStandard porting and mounting kits to save shop time.

12 V / 24 VMatch your machine voltage without rewiring the world.

Already know your pressure, flow, and ambient? Use the kW/°C calculator below to pick the right frame fast.

Pressure (bar)

Flow through cooler (L/min)

Ambient air (°C)

Target oil-in to cooler (°C)

Uses defaults: heat fraction 30%, capacity margin +15%. Change inside the script if needed.

Whether you already know the kW/°C you need or want guidance from our engineers, we’ll help you lock in the right Oesse cooler fast.