Wacker Neuson Cooling System Leak

Generator is leaking coolant under the unit or inside the enclosure

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Cracked radiator, Loose hose clamp, Failed water pump seal, Damaged coolant hose

How to Fix / Troubleshooting

Safety first: Never open the radiator cap on a hot engine. Allow full cool-down and relieve pressure before opening the system.

  • Identify leak source: Inspect radiator, hoses, water pump, and drain plugs for wet areas or dried coolant residue.
  • Tighten clamps: Gently tighten hose clamps at all hose connections.
  • Replace damaged hoses: Any hose with cracks, bulges, or soft spots should be replaced with the correct diameter and rating.
  • Radiator repair: Small leaks may be repaired by a radiator shop; large cracks usually require radiator replacement.
  • Refill and bleed: Refill with the specified coolant mix and bleed air from the system per the manual.
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Repair Difficulty

Medium 3/5

Required Part

Radiator Hose Set
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