Gilwell Park Posted February 16, 2022 Share Posted February 16, 2022 Hi. I have recently acquired a second hand Kleinbahn model of the Austrian class 93 tank. It is a very poor runner, there being little side play in the axles & I suspect Mazak rot has swollen the main casting. Has anybody else had this problem? Thanks Roger. Link to post Share on other sites More sharing options...
TT-Pete Posted February 18, 2022 Share Posted February 18, 2022 Ooh, sorry to hear that, unfortunately when mazak rot sets in it's usually game over and it's definitely something to watch out for on older Kleinbahn and Rivarossi models. Did the seller declare the poor running or that there was a problem with it? I've been lucky so far in that none of my 70's-90's vintage models have exhibited this problem, if you google it there is discusion on line about the causes and possible treatment. There is a thread here: https://en.wikipedia.org/wiki/Zinc_pest Link to post Share on other sites More sharing options...
Gilwell Park Posted February 19, 2022 Author Share Posted February 19, 2022 Hi TT-Pete Interestingly the model was sold as "used" Which according to Ebay means " fully operational, functions as intended". It was also described as " not tested" which rather contradicts the Ebay definition. The loco was in immaculate condition still wrapped in Kleinbahn tissue. When I first applied power, just a buzz, so I removed the motor which ran perfectly. As the wheels would not move I suspected Mazak rot but as it was bone dry i lubricated thoroughly, probably too much but it began jerky movement. I left it overnight and was better the following day and has improved since. I reckon it had never been used or oiled and just needs running in. So no Mazak rot. Roger 1 Link to post Share on other sites More sharing options...
RMweb Premium Vecchio Posted May 25, 2022 RMweb Premium Share Posted May 25, 2022 Was it Kleinbahn or Klein Modellbahn? (the Brother of the guy who manufactured Kleinbahn) Klein Modellbahn had the Mazak rot problem ion almost all of their engines and I lost several otherwise wonderfully detailed models. Kleinbahn itself, with their more play like approach and less details obviously used a better alloy and never had mazak rot problems. Link to post Share on other sites More sharing options...
RMweb Premium Vecchio Posted May 25, 2022 RMweb Premium Share Posted May 25, 2022 Actually it was a Kleinbahn loco, so I do not think that it is mazak rot. Probably the oil has gummed up. A day in paraffin oil may help. Link to post Share on other sites More sharing options...
Gilwell Park Posted May 28, 2022 Author Share Posted May 28, 2022 The loco in question was Kleinbahn and had not suffered from Mazak rot but was very stiff. Now free running but noisy. Kleinbahn Re4/4 do suffer from Mazak rot. I know, I've got one. Roger Link to post Share on other sites More sharing options...
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