Beautiful old girl. This Princess is terminally ill and on borrowed time, but it does my heart good to see that you've been able to keep her alive, even if only for a bit longer

Sat down to watch this thinking to myself I've never seen you fail --- till now. Then with perseverance you got it running. Your status as a master has been maintained. Love the videos. Looking forward to seeing the layout progress. Keep up the good work

It was hard to believe how bad this model was, simply by looking at it, and you worked something of a miracle getting this one back to life so well done Bill for another interesting and informative video.

OO Bill, Was this your biggest test yet? I say it a lot, your the Model Railway equivalent of Springburn Works, so I think that shed of yours, should be called the Works, given the nature of this repair, the swearing was probably apt for what would be said on the shop floor, in Springburn Works too.😂 I bet beer o'clock was greatly appreciated after that repair. Great video. Thank you for sharing.

good restore, If only a temporary fix. The chassis will continue to crumble away. These princesses are good for spares only. I’ve had 4 sent to me like this and 3 of them crumbled away whilst i was taking them apart. I have spoken to Peters spares and people are trying go get Hornby to cast some new chassis blocks but they just are not interested. Its a shame.

That's an interesting one Bill. That mazak rot will continue so, as you said, this is a temporary fix unfortunately. Great work finding a solution. The layout is looking great. Happy Modelling Mon

Well done for getting it running again, just had mazak problems myself on two Lima 20's

Never heard of mazak rot before. Googling reveals problems aplenty (especially if you have a long line of old Hornby engines all waiting reactivation in 2024!) Thank you for enlightening us all and congratulations on a successful diagnosis!

I really admire your skill and patience. I just cannot (yet) deal with the fiddly wiring. When you put it in the vice I feared the chassis was going to come back broken and in pieces but you succeeded.

Excellent work. I too have been struggling with Chinese engineering. Here are the instructions which don’t really help Screw off the nail on the front cover and unload the front cover. (refer to figure 1). Find the wire hole with gasket in the bottom and pass the power wire through hole. Fix the bottom on the selected position with the inflated screw (refer to figure 2). 😂😂

Hi Bill brilliant video you did a brilliant job of repairing it I never thought you could get rot on hornby locomotives we learn something every day keep up with your brilliant work Bernard

He can resurrect the dead. I'm not so sure he can walk on water but sometimes he comes very close. Well done Bill.

Great perseverance Bill in fixing the chassis, another great loco back up and running.

Well done Bill - Great Sluethin to get her running again, and Whatta Beauty. I’ve always fancied one of these so there’s some Good advice to be Heeded in this Episode 👍🏻 - Time Stamp - Jiggery Faffery 1.33 & Manky Brush 14.48 😉 🚂🚞🚞💨💨

A good bit of investigative work and surgery there . Didn’t realise a Princess would have mazak rot . Have been thinking about getting one of these , so thanks for warning

Ah, so I have a Bachmann 56xx & a Hornby 8F (the latter being of a similar vintage to the Princess in this video) that are manifesting "wheel tightness". I will now investigate further and possibly deploy my round files....

Well, perhaps with this era of 3D printing being a thing, maybe some day these models suffering from MAZAK rot will get the aftermarket support they desperately need (I've got a model that is worth quite a lot of money that actually came from this era of the Mazak rot plague, it hasn't been effected as of yet, haven't done much running with it though just because I'm so paranoid). But for now, you've at least been able to give this Princess a new lease on life for the time being, even if it's only temporary.

The Loco Doc helps another ailing model back running condition,hats off to you Bill …. ,True Grit.

Very interesting thanks Bill. They are still a nice smooth runner. I often try to think if any of my Ioco's have any of these problems, sometimes they have and I can fix them, thanks to you!

What a star you are. 😊😊😊😊

John from Ontario Canada. I have been enjoying your videos for some time now.

Always great to see a runner at the end of the video!😊

A big well done bill 👏 👍 yep the dreded muzak rot .I've got a Hornby class 31 with it but a bit of patience a file and some araldite I got it up and running. So the moral of the story is don't give up on your model. Great video bill .thank you 😊

Well done Bill

Good job on this one. Well done for persevering.

well done Bill from a right off to a runner. Great job.

Hi Bill, If there ever was a case for a new chassis this is it. Perseverance might make one. looking at some of the models for sale as spares mazak looks to be a major cause of their problems. But well done on getting running again for how ever long it has left. I must dig mine out to check what condition it's chassis is.

Amazing work👍

Nicely done

Mazak Rot : Usually means a death sentence , you must have Watt genes and other Scottish engineers in your blood , CRIVENS/ jings

Hi Bill. I have enjoyed your videos for several years and you have encouraged me to go into the loft and bring down all my engines and rolling stock that has been stored there for a least 40 years! I have some plans for a layout - the loft would be great as it would provide 30ft x 40ft. Obviously I am going to need to service each engine - about a douzen I think. I had a quick look and I think it might be just an issue of a cleaning and lubrication as they have been stored away dry. Can you tell me which cleaner to use - e.g. for the commutator and that spray cleaner? Can I assume the magnets will need re-magnetising? Thank you for encouraging me to get back to that hobby as my years advance! Best wishes. roger

Another brilliant job Bill ! If you only repaired HO models, I would have a challenge for you!

Another great video! I do wonder what 'lifespan' these more modern locos might have given their complexity and all those fiddly delicate parts? I doubt many of them will last as long as some of the models from the 60s, 70s and even 80s. Only time will tell!

hi Bill, great video,that certainly tested your skills, poor quality chassis.well done

Brilliant reapair ,,, a lot of locos are getting to the stage of Mazok rot now but its good to know they can be restored for another run or two

Well done.

Great job Bill, I thought that loco was a goner .

Another good repair and saved from the scrap yard

Saved from the scrappers well done bill, 37 looks good 👍

Unfortunately this particular model of the Princess is well-known for suffering mazak rot. Long may the infamous rot stay away from my other princesses. Well done Bill yet again.

Hi Bill, Love the channel...Can i ask a question. I recently bought a Hornby 125 unit that has no couplings. Have seen several others at a fair and none had couplings either. Is this correct??

An impressive effort. These are horrible models to work on at the best of times, and pretty much anyone else would have written this particular one off. I think there are a few bits missing from the body here and there. As you say, they're nice enough models, when they're in good condition... but unpleasant to deal with when things start to go wrong. I'm shocked that a relatively modern model like this would suffer from bad Mazak rot - I've really only encountered that on older models, and I thought it resulted from contamination of the metal alloy, which should have been eliminated in modern manufacturing.

Excellent job! 1st video without a schoosh?? Surprised by the mazak rot I thought it was only affecting older models but I guess Hornby were saving money at the time of manufacture!

Hi Bill. Great work matey! "I don't like to be beaten"... spoken like a true Scotsman. No wonder we Sassenachs dread playing you at Footie and Rugger. Bill 1 v. Alan 0! Paul. 👍❤️

Genius...

The zinc rot problem is common in some marklin models. My ho issue is I don’t know how to get the cab liners out of my loco body. For some reason the front windows have fallen in and the slider pick up has broken! When you have time I will sent it to you. By the way do you have a list of your tools and oils/greases you use and especially how to make your sponge cradle to hold the locos. Harry

I do find these interesting, if not being able to really understand them. A question, can you not print a chassis by 3D printing? And best wishes for 2024

Hi Bill, well done on getting some sort of result. Quick question, what kit did you use for your small road bridge in the scenic area?

Hi Bill, thanks for the video - well done for repairing the 'Lizzie'. I have a fond memory of having a short ride on the footplate of the real one in April 1971 when the loco was kept at Ashchurch, near Tewkesbury. Have you any idea which models suffer from the mazak problem?

not all superheroes wear capes , Super Bill saves the day 👏👏👏 Bill I’ve been admiring the shed for a while did you scratch build it or is it a kit🤔

A real challenge and a stark contrast to the Triang Princess Victoria you recently repaired. Yes the detail is there in the new ones but the quality is questionable. The Triang Princess will go forever with periodical service but this modern one although running for now 'to your credit' is ultimately doomed.

Excelant video Bill, i am working on one now with similar issuses, but with all wires disconected, i keep geting a circuit between eah wheel and the chassi, can you explain how the axels are insulated from the chassi please.

Hello Bill, well done again , lovely loco not going in the spares box . I have a loco that would be an extreme "Dare" , should you choose to accept it it . If you're up for it can I send some pics to let you know what you're in for , cheers , Frank ....yes that one 😂

I thought mazak rot would be a thing of the past by now , surely they know of it and could tweek the formula for the metal to 'stop the rot' .

good vid bill on channel keep up the good vids thanks lee

@OObill watching you working on this reminded me of my class 08 situation you kindly gave some advice on email. Terrible quality during the 2000s, assuming thats when its was built. Ps. Spares are ridiculously expensive and hard to get, 2nd hand locos i got for £30 this time last year are now selling at £50 minimum . Btw, ive bee. using superglue and baking powder mix over the affected metal on some locos. Depends how bad a case it is i guess.

Love the 37,

Hell of a job on this one Bill. Could a cassis not be 3D printed for these (it would obviously need some weight adding) ?

Nice work getting that shed of a loco running! I knew as soon as you said the wheels were locked tight that it’d probably be mazak rot as the core issue. When you say Hornby models from this era, roughly what years do you mean out of interest?

Well done Bill. I did, however, notice that it slowed down considerably on the curves. Do you know the cause of that?

Maybe your dog as taken them we had a cat that moved things like combs and hair brushes around the house

Hey Bill, great video I have a bundle of triang rocket spares to build a loco, would you like to have a go at it?

I think that these new ones are a very poor design. Personally I much prefer to have my older Tri-ang princess locomotives. I have four, which have all been completely rebuilt, as they would have been from the factory.

Thesse chassis are poorly designed hornby garbage

Hi there Bill ,, good reqpair there m8,, though i got to ask the question of what the heck is murderkrot ? Cheers from John in Australia.