GENMA Maintenance · Hands-On | Cooler Cleaning: Dry Dust, Wet Dust, and Oily Dust Need Different Approaches

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GENMA Maintenance · Hands-On | Cooler Cleaning: Dry Dust, Wet Dust, and Oily Dust Need Different Approaches

Oct 20, 2026

Hydraulic, water, and air coolers are key components for heat dissipation on GENMA machines. When cooler surfaces get dirty, cooling efficiency drops, oil temperature rises, and a series of problems can follow. But different types of dirt require different cleaning methods.

1. Three types of dirt, three methods

Dirt Type	Cleaning Method	Max Working Pressure
Dry dust	Clean with compressed air	3–4 bar
Wet dust	Clean with a steam nozzle	3–4 bar
Oily dust	Clean with a steam nozzle plus mild cleaning agent	3–4 bar

2. Points to note

· Keep pressure moderate — 3–4 bar is sufficient.

· For oily dust, use a mild cleaning agent, but avoid letting it enter the hydraulic system.

· After cleaning, check that the cooler surface is clean and the fins are not deformed.

Rising oil temperature is an early warning sign of reduced cooler performance. If you notice abnormal oil temperature, check the cooler surface — and also watch for oil mist in the cooling air caused by external leakage in the heat exchanger. This can interrupt heat exchange and needs prompt attention.

Regular cooler cleaning is a basic task for keeping hydraulic system temperatures stable. Any questions? Feel free to reach out to your GENMA service engineer.