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Nilfisk Aero 26 21 vacuum woes

Can’t help you with you with any advice Rodger other than to say I had two Nilfisk vacuums die, both after a not many hours of work. After the second one died the company refused to replace it, said I was obviously abusing it.
This was all over 15 years ago, bought a Protool now Festool and still going strong.
 
Which trip went, MCB, RCD, inbuilt one? That’s the first diagnostic fork in the road.

6 ohms wouldn’t be that far out for a universal motor, depending on size. If shorted, it’ll usually make an ominous burning/arcing sound. Commutator might be burnt/pitted, brushes too, or the windings might be blackened in places.

RCD trips might be the EMI filter, or carbon dust buildup, or a badly damaged winding.
 
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Guineafowl21 said:
Which trip went, MCB, RCD, inbuilt one? That’s the first diagnostic fork in the road.

6 ohms wouldn’t be that far out for a universal motor, depending on size. If shorted, it’ll usually make an ominous burning/arcing sound. Commutator might be burnt/pitted, brushes too, or the windings might be blackened in places.

RCD trips might be the EMI filter, or carbon dust buildup, or a badly damaged winding.
Click to expand...
It's an RCBO
 
If it helps Numatic (Henry) are based in Yeovil. They used to be Nilfisk, many years ago, so there might be common components if it's an industrial model. See also Miles Tools & Machinery Centre (mtmc.co.uk), which are also Yeovil. They stock a vast range of spares, although their excellent web site seems to be down (actually says "closed," which is worrying).
 
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