Greenhil Junction - Fixing Mazak Rot on my 9F Part 1 - Video 29
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- Опубліковано 11 вер 2020
- Time to get back to some loco running and maintenance and a job that I've been putting off for ages, and having a good think about, is trying to get rid of an fix the mazak rot in the tender of my Hornby Railroad 9F. Plenty of videos about it, not so many about how to fix it and get a midel running again.
As always, I'm after the most cost effective way to do this so here I show you what my plan was, what I used, how it worked out and how it only cost me £4!
Thanks as always for watching, please leave any comments you have and subscribe to keep up to date with the layout.
#modelrailway #9f #hornby #mazakrot #howto - Наука та технологія
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Great video the problems can always be solved, Ktf John
Hi John. That loco is still going strong on the layout, just shows what can be done if you just have a think about it and try something. Cheers, John.
This happened to me too. I designed a 3d printed chasi that holds into place with holes to hold all wheels and it hold the pickups as well. Never looked back 😁
Hi Dwayne. Glad you managed to gt it fixed too. I didn't have access to 3D printing so I decided to essentially bodge my way through it and see what happened. Mine is still going strong too, love watching it haul my wagons round the layout. Cheers, John.
Hi, I have two locomotive fail with Mazak Rot, a Diesel and Steam engine. Hornby gave the equivalent value of the Diesel back and a replacement for the Steam engine. Very nice fix you made. I use DCC Concepts DCF-WP12 Wiper Pick Ups, the small screws may have fitted your pickups to the chassis...Simon
Hi Simon. That's a nightmare! So frustrating that we get charged so much for models yet they fall apart on us. At least you got some money back, mine was 2nd hand so I would've had no chance of that. Never thought of screwing them in, good idea though instead of messing about with glue. Cheers, John.
Hi nice fix for £4 ,now you can spend £90 on something else ,never heard of this mazak rot before ,ah those pesky Chinese using cheap material ,must say that 9f ran very well after the fix ,thanks for sharing ,look forward to more of seeing your layout ,all the best Ray.
Hi Ray. Thanks for watching and commenting. I'd never heard of it either until Sam's Trains did a feature on it. Glad I got it running again cause it is one of my favourites. Cheers, John.
Ray, Mazak has been used for some time in model trains. In WWII Meccano was involved in government contract and discovered the problems with the alloy. Funny old world Meccano owned Hornby. Triang also used the alloy! Obviously the lesson were not learnt regarding this material. The alloy has to be mixed to a high standard to avoid the problems now experienced. Hornby's quality control on Chinese production of the alloy leaves a lot to be desired based on the past history of the company!!! As a strong advocate of returning manufacturing to the UK from China can we only then improve in production quality, plus it creates jobs.
Hi Chris. Thankfully this is the only Hornby model I've had this problem with, and I've had a few. Certainly any of the new Hornby models I've got have been excellently made, but still made abroad, but then it's probably cheaper to do that and all you see is complaints about the cost of models. TBH Hornby just can't win. Hopefully they don't develop similar problems as they get older. Cheers, John.
Nice video and repair work. You mentioned it was Mazak Rot (Zinc) rot, but it decayed the plastic? Were there tin or lead alloy screws in there? How old is the model? In any case, it is a sharp loco and glad you could save the tender (hopefully the engine/motor are clean, too). Cheers!
Hi Anthony. Maybe it was an alloy, I'll need to check, I just thought it was hard plastic. There were no screws, it was all just moulded but broke very easily. I've no idea how old it is, got it off eBay but it was DCC ready so can't be that old. Cheers, John.
@@GreenhillJunction Hi I Have the same model 9f as yourself ,manufactured between 2009-13 ,odd thing is my friend had the same morel exactly with no mazak rot in his ..Luck of the draw i recon !!!
Hi Lester. Would seem to be that indeed. Mine is still going strong after these repairs so it looks like if you spend the time removing and replacing the bad plastic you can have a perfectly good model. Cheers, John.
What about the mazak rot on the locomotive motor housing?
@@markhensby4352 Hi Mark. I've not had any issues with the motor housing thankfully and the 9F is still going strong to this day after the repair in this video. Cheers, John.
Also you mentioned this is a problem with the plastic, does it affect the plastic as well or is it just a metal thing
Hi Chuck. Sorry for the delay in replying, I've been away. It just affects the metal, not the plastic. I got confused as the metal actually feels and crumbles like plastic once the mazac rot takes effect. Cheers, John.
Are locos wheels susceptible to this I have a 79 Mainline Railways Clads 42 Warship and I was wondering if this was found to be a problem in these models. I'd see one or two claims where certain steam engines that had problems with their chassis but what I can tell this model has plastic chassis minor metal parts including the weight
Hi Chuck. Thanks for watching and commenting. I've not found anything in my research on mazak rot to say it effects the wheels. The reason I found it on the tender of my 9F was because the wheels were jammed and being dragged along, so if that's the problem you've got I'd suggest taking the chassis apart and having a close look at the inner gubbings. Although most of the model might be plastic, metal is often used for the more important mounting points. Cheers, John.
@@GreenhillJunction I know mainline chemically blackened the wheels on the Class 42 and they look a lot shinier than the rest of the metal on the model. I think there are two models within the mainline lineup (two steamers with metal chassis) that we're affected. Is it something that will come along later down the line? I think my model is pushing 43, and I may have read somewhere that someone had a toy from the 30s that finally got affected after some 80 odd years. I only ask because I got my warship customized and it cost a lot of money.
I guess my main question is is there anything I should be worried about I had no idea that this was and I shouldn't until the other day and I've been collecting trans of all ranges again the main one that I'm concerned about is the class 42 from main line if anybody else that's been talking about it
Hi Chuck. I'm not an expert on the subject, so I just don't know. To put your mind at rest my 9F was made around 2008 (I think) so if yours is 43 years old I'd say there is a decent chance it will be ok. Cheers, John.
You incorrectly state that mazak rot (aka zink pest) affected the plastic of your fake tender motor, used to add extra weight to the tender. In fact, according to Wikipedia (en.wikipedia.org/w/index.php?title=Zinc_pest), it is caused by contamination of the metallic zinc alloy with lead.
Hi Steve. It had effected the metal so badly it looked and felt like plastic, I was later told by someone else that it was in fact metal. Point of the video was to show what it is, how it effects the model and how to cheaply repair it. Cheers, John.
@@GreenhillJunction - I had never heard of ZinkPest, until I Googled it, so I thought it was worthy of a comment and link to the wikipedia article. It is not clear to me if your locomotive will potentially suffer further problems with metal fatigue?
I've been told it may, particularly the motor mounts. Not ran it since I repaired it and I've had to leave the railway whilst all the building works were happening in the house. Hopefully not cause I really like that model.
With all due respects you did not fix the Mazak Rot you rebuilt the tender. I hate to break it to you but the same MR is in the locomotive chassis too and it will crumble to pieces in time. Anyone with a Chinese made loco(s) is siting on a Mazak Rot/Zinc Pest time-bomb. In 20 years time people will be still running Lima DC models and Hornby UK made DC models from the 1970s and all the expensive Chinese made trains from 2000 to today will be dust.
Hi. Thanks for watching and commenting. Perhaps I fixed the problem of mazak rot then? The mazak rot was the problem, I found a solution to it, therefore I fixed the problem. Semantics really. I did find some mazak rot in the loco engine mounts, and I removed and fixed that too (see part 2 video). That was a couple of years ago, the loco still runs like a dream and I have not had any further issues on any of my 21 Hornby locos from across the past 10 years or so, so seems a bit unfair to say all Hornby locos will be dust, but that's your opinion. Cheers, John.
@Greenhill Junction Locos with MR are always doomed no matter how individual sections are repaired/replaced. It's like cancer and once starts the entire chassis will crumble to dust eventually. I am not being negative for sake of it but MR can not be cured. I have been burnt myself by this overpriced Chinese junk. So I am on your side.
🤣naturally our man here is talking absolute crap because he has no evidence it effects every chinese made model. If he'd like to send me a material sample from every production run of a chinese made model I'll gladly send them off to the local materials testing lab happily run by my mate and he'll tell us the alloy composition of every one of them with a very high degree of accuracy.
But alas I doubt he'd be interested in this because it might blow his opinionated rants on chinese manufacturers out the water and he might have to say something that isn't specious about the issue.
Hi J Jay. Everyone has their opinions I suppose but it is a bit generalised to label all the Chinese models the same. Yeah, some did have a problem but they obviously realised this and rectified it cause, as far as I know, all Hornby models are still made in China but don't have this problem anymore. Maybe he was just unfortunate and bought a lot of models at the time when they did have mazak rot. Cheers, John.
@@GreenhillJunction nah, he's got form for just talking rubbish.
He just doesn't like stuff manufactured by none white people. He's just another idiot like sams trains, sadly this hobby suffers froma gullibility problem but generally its participants mature beyond listening to these nonsense merchants so there's light at the end of the tunnel.
Made in China crap from Hornby, yet no issue's with Margate produced 9f.
Yeah it's not great, but it's the only Hornby model in my collection that's had it so I'd like to think it's a problem from the past. This was a 2nd hand model from eBay. Was good fun coming up with a solution and it's still running fine to this day. Cheers, John.
Lima 1970s locos plastic chassis and steel bar weights will be running in a hundred years from now.
@@ArcadiaJunctionModelTrains what about the mainline Railways class 42 warship
Why should you spend £90, Hornby has become like any other American owned companie that don't support RIGHT TO REPAIRE .
Hi Stephen. It's not that they don't support it, they just don't make the advice and or parts easily accessible. That's why UA-cam is so useful, and the ever expanding market for 3D printing of parts too. I wouldn't have done this to a newer, expensive model, but took a punt on this one as it wasn't much to start with. I enjoy problem solving and am always pleased when this keeps running round my layout having had a very cheap repair. Cheers, John.