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Hi All,I've recently picked up a old Australian Dillon Mk III off of eBay. It's in good condition for it's age but there's a few things that puzzle me....Can I clean, check or service anything on this torch?Will the new DHC welding tips and accessories fit my Dillon?It came with 5 Welding Tips but none of them have marking. How can I tell what size they are?One Tip is made of copper so I assume that's a cutting tip?You can see from the photos that one of the tips is badly worn. Is it Ok to grind that back and reshape it?Many thanks for your help.Neo
Reply:I don't have one of those torches, but it seems evident to me that the size is indicated by the number of bands around the body (0,1,2, or 3).Generally, the best way to fix a torch tip, is to TIG weld it shut, and then drill it out with the proper gauge drill bit (ideally in a lathe). Not having that equipment handy, I would recommend not grinding the tip back. That will leave a more weirdly shaped hole. Not a good thing.
Reply:Yup, the grooves indicate size, 0-3. Oxygen cutting tip is made of copper, correct. The number 2 tip should be used for the flame when cutting, possibly the reason why it's so f*cked - get a new one. As far as I know the DHC tips fits all torches "in the family" no matter under what name it was sold (but there are at least two diffrent sizes of gas hose fittings).
Reply:Thanks guys .... that's really put me on track.... I hadn't even noticed the gooves I've also just found this which confirms the sizes (from the pictures) too.And G-son you must be dead right about that cutting tip..... It all makes sense now ;-)All the best.NeoLast edited by Neo; 02-11-2013 at 06:15 PM.
Reply:Does anyone know if I can clean, check or service anything on this torch?All the best.Neo
Reply:Neo, Should not really need to "service" anything. I would just check for leaks at all the valves. Parts are available if needed.
Reply:Originally Posted by makoman1860Neo, Should not really need to "service" anything. I would just check for leaks at all the valves. Parts are available if needed.
Reply:Sorry to come back on this but the two gas taps are bit stiff and creeky...is it Ok to unbolt them and put a touch of anti-seize grease in there?
Reply:Originally Posted by NeoSorry to come back on this but the two gas taps are bit stiff and creeky...is it Ok to unbolt them and put a touch of anti-seize grease in there?
Reply:Pure oxygen makes stuff that normally burns burn alot more violently, and stuff that normally does not burn will often burn in it too. Oil, grease and such substances has a habit of self igniting and exploding in pure oxygen. Ordinary oil/grease is absolutely not suitable in equipment that comes anywhere near pure oxygen.The valves on my old Dillon torch is sticky too. A bit annoying, but I've learned to live with it - at least until I can get my hands on the right kind of stuff for a price I can afford. That's not gonna happen any time soon...
Reply:Its not that expensive. Last 4oz tube I bought was about $14 at the local medical supplies shop attached to the hospital. Krytox, Christo-Lube and others are commonly available.
Reply:Dive shops that cater to technical divers also carry Krytox, Christo-Lube or another O2 safe lubriciant. You have to have an O2 safe lube if you have a closed circuit rebreather. I know the shop I used to work for also sold the stuff in small squeeze packets like ketchup comes in only smaller for lubing O rings on rebreathers in the field. Prices are a bit on the stiff side usually compared to the same stuff bought else where like medical suppliers. If they are a good shop and do O2 service work on dive equipment, you might be able to get them to simply lube up the torch parts you need done for a few bucks vs buying a whole tube. They probably have a jumbo tube of stuff in the service area and two tiny little dabs wouldn't kill them..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:I just bought one a couple weeks ago, here are some video links to help you. It takes a LOT of practice, but I am starting to like it. For aluminum, use plenty of flux, I was very frustrated until I added more. If you welded steel in the past with OA you will have to relearn techniques with this, it is different.http://www.cutlikeplasma.com/video_library.htmhttp://www.cobratorches.com/demo-videos/
Reply:Hi Gents,Thanks for the slap on the wrist ... ....and the advice on the grease.I'll find some and get some ASAP All the best.Neo |
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发表于 2021-8-31 22:54:17