I chucked the oil everywhere when I took apart my K1, I assumed the metallic look was contamination either from the piston wearing or water leaking through. Definitely not built to last, mine had cracked the plastic "cylinder head". I just put it back together as is and called it good, I'll replace it when it catches fire. Let us know how the Kranzle compares, going off the spec sheet it doesn't appear significantly better than the Karcher.
There's no plastic poxy pumps or housings in the kranzle I can assure you of thatI bought the 10l per minute version, the karcher was 6l I believe. Apart from that the output pressure at 120 bar is the same. The karcher weighs 6.5kg, the kranzle is 23kg, so I'm guessing a bit more robust, we shall see
been there......I drain mine now every time. Mine actually split the casingMy Karcher K3 power washer developed an internal leak. My fault for leaving it in the barn over winter. So took it apart.
Here's the pump and motor assembly.
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Pump detached. Not sure what oil came out but it had a metallic shimmer. The washer hasn't done much work so not built to last.
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I can now see the problem, or at least one, they may be more. The frost had pushed the o ring out of the joint. You can see it in the bottom left quadrant of the picture below.
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O ring is a couple of quid. Once I find out what the oil is I'll order the o ring and oil if I don't have it. No rush as I've fixed it with one of these
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The missus went a over t on the mossy flags outside the chicken shed so it gave me an excuse to get one that will last. The Karcher K3 cost me 85 quid last year they are now "reduced" to 140 quid.
I'll build a trolley for it with hose reels, and remember to tuck it up somewhere warmer over winter.