Triumph crank repair

[@chand3ler]

Hi Ade. Just found your channel yesterday. I like that you take the time to reply to a lot of the comments.

[@AGEngineering]

Hi John, thanks for watching, glad you found me, spread the word! if people take time to comment, then I like to acknowledge that, till I get to a million subscribers anyway ;)

[@shedbuiltable]

interesting use of the belt sander there mate,nice one,another trick to ass to the book many thanks dave

[@chrisstephens6673]

Good save, was it dropped or just a numpty with a hammer? My tip for this week is, if you have to recut a centre an old turner's trick is to use the centre drill as a form tool instead of as a drill. By this I mean have the 60 degree cutting lips horizontal, enter the damaged cone and push the drill chuck away from you with the cross slide so it only cuts with one lip. What this does is stop the drill wandering about by the damaged crank and properly cuts a true centre again.. Many moons ago I posted pictures on one of the forums where I showed a Norton Inter crank I saved, where someone had had a major attack of hammeritis and belled over the thread. John Stevenson ,of blessed memory, commented that he would have used his 3 wheel thread roller to reform the thread, rather than cut away metal, I wonder if something similar, but using plain rollers, would have worked for you and saved having to remove any metal. ATB c PS the Norton crank was damaged because the owner had taken duff advice about which Loctite to use to hold the bearings in the case. It set far too quickly and before they were fully home, he claimed, poor chap was nearly in tears when he gave me the job. But they were tears of joy when i returned it, I love a happy customer! They are the ones that pay double what you ask, in case you wondered how to tell. :>)

[@AGEngineering]

Don't know on the crank, apparently it had been kicking around for a while. Wow, you need to do some videos Chris! Good idea with the centre drill. I have one of those thread reforming tools in the drawer, only got 26 TPI rollers on it, I'll have to demo it on a video sometime. I too have had the really big tip/well chuffed customer on occasion. Best wishes, Ade.

[@chrisstephens6673]

My little shop is so cluttered I barely have room for my feet, let alone a tripod, but I haven't ruled it out. I do some weird things out there sometimes, some of which might prove interesting to easily impressed viewers.:>) The Inter crank had a 20tpi thread, if I should ever get another one to do I would probably make my own thread restorer, they are dead simple to make as you know.

[@geoffgreenhalgh3553]

Get those sleeves rolled up! (Geoff. 49 years a turner)

[@AGEngineering]

Good point! Thanks for watching, Ade

[@rattusnorvegicus4380]

Have some heart,the poor chap is working in -2C :)

[@AGEngineering]

Sleeves are more up in the latest episode, but it was a bit warmer ... Thanks for commenting gentlemen!

[@bubster1981]

Would have been a treat to have a lathe big enough to chuck on the big flywheel

[@AGEngineering]

I have already run out of space, I thought the new workshop would be the answer but Ebay proved me wrong 😕

[@billythebake]

Hey man, I know you can't be a *REAL* motorcycle guy, since the ones on TV shows all have a ton of tattoos and piercings and so forth... Just kidding ya', man; ran across your channel recently and have really enjoyed the content. Happy New Year and keep up the good work!

[@AGEngineering]

Thanks for watching and commenting, great to have you aboard, regards, Ade

[@HermanMunster420]

I'm rebuilding a 1972 T120V from the ground up, are there any other year crankshafts I can use? I'm having trouble finding a 72'.

[@AGEngineering]

I don't have enough experience to say away, but if you were to check part numbers in the spares books from different years that should get you in the right direction. Good luck with the rebuild

[@HermanMunster420]

@@AGEngineering thanks much! lucked out and found one, love your videos, they're an awesome resource ✌️

[@bigred8438]

Do modern oils create as much sludge as the oils used when bike was manufactured, do you know?

[@AGEngineering]

Good question. I'm no expert on this but here is my assessment...If the bike is run on modern but 'old' technology oils, i.e minimal or no detergent additives etc, and run in the same way as they would have been 'back in the day' as in low oil change frequency, used daily for work, all weathers and conditions, poorly maintained etc, then I would expect the result to be the same, sludge! If run on modern detergent oils used from a properly cleaned, rebuilt engine starting point, regular oil changes, low mileage, pampered maintenance, then I would expect to see a cleaner, lower sludge engine, but remember, it is still an old tech, cast iron, poor filtration, poor temperature control machine so will not be like a modern one. Anyone else any thoughts? Thanks for the comment, Ade.

[@bigred8438]

@@AGEngineering It would interesting to see whether thevaddition of an oil cooler like that on the trident and rocket three made much difference to this challenge. Thanks for your response. Incidentally, l have a 1980 model Moto Guzzi and the recommendation for oil type in that has changed to semi synthetic that has a broader operating temperature and viscosity range. It is a similar level of agricultural technology, with push rods etc and no oil cooler (although l probably should put one on), But l think as you say, the frequency of oil changes is critical to preventing engine wear and sludge build up.

[@littleworkshopofhorrors2395]

Olden days oils were relatively low tech lubricants and the crud would settle out in the bottom of the tank and in the sludge trap. Then came detergent oils that kept things clean, no more need for flushing oils when you changed the oil, but they kept the crud in suspension and needed paper filters to save crud being fed into big ends with the oil. So a sludge trap should be fine for a long time, it never was a regular service item anyway unlike some bikes that had accessible traps. Then came multigrades and synthetic molecules but that is another story. The above is a simplified version because that's about my level of competance. So ideally take advantage of modern technology for anti oxidation and acid and all that hi tech stuff but fit a remote oil filter to keep it clean. Remembering that older machinery had slacker tolerances than today and water thin oils might not be best for them, you can get HD oils of thicker monogrades which can quieten engines in many cases. Also remember multigrades were developed to save having to change the oil grades between summer and winter and give car starters and bearings an easier life in the cold, so if you are like the average Harley owner and only use your bike between Easter and August bank holidays, monograde oil will be fine. Again the above is a simplification.

[@iantaylor5579]

You could remove the mushroom with a crank grinder but the centre would still have to be restored first

[@AGEngineering]

Thanks for the comments and for watching. Yes you could remove the mushroom with a crank grinder, I would love a crank grinder but they are way expensive, and I don't have the space sadly.

[@leonardgore7948]

Be better to turn the center in by the crosslide and facet at the same time

[@AGEngineering]

Top tip cheers

[@shedbuiltable]

i meant add to the book

[@AGEngineering]

I hope to get to making a tool post grinder one day ,maybe. Thanks for all the likes you post on your channel Dave! Regards, Ade

[@rattusnorvegicus4380]

Dave,if you click on the three vertical dots to the right of your message,there`s an edit option. Very much enjoy your vids,as I do Ade`s,a link from which I found your channel.

[@AGEngineering]

Thank you for viewing, glad the channel links help everybody to find interesting content, regards, Ade