kac Posted January 8, 2020 Share Posted January 8, 2020 The GB knob on my Tejon is super loose now after the tons of hours I put on it and I get a little waver in the threshold. Trying to find who sells damping grease in really small quantities as the stuff is horribly expensive. Mcmaster has some at $111 + shipping, Amazon has some in the $30 range and all more expensive than the potentiometer itself. I could replace it but rather not start soldering in parts if I don't have to. Link to comment Share on other sites More sharing options...
Joe D. Posted January 9, 2020 Share Posted January 9, 2020 Hey kac, This is what i found, hope this helps!?? 3 Link to comment Share on other sites More sharing options...
kac Posted January 9, 2020 Author Share Posted January 9, 2020 I'll see if they have a small small tube. If not wonder if I could use dielectric grease on it? I don't think Tesoro used the highest end components. I'm surprised the pot wore out so fast. If I have to replace it i'll take a gander at military grade ones and replace the bunch while im at it. Thanks for the link 1 Link to comment Share on other sites More sharing options...
Detecta Posted January 9, 2020 Share Posted January 9, 2020 The cheapest way out is to place a rubber washer under the GB knob. 2 Link to comment Share on other sites More sharing options...
kac Posted January 9, 2020 Author Share Posted January 9, 2020 There was a split o ring on the shaft, guessing that is what was the issue and also there was almost no resistance. Tried to request a sample kit but that page is blank (of course). Dug through my shop of horrors and had some high temperature silicone grease which stabilized it but I need to find a small o ring. Really tempted to just replace the pot with a better brand. Anyways the machine working now but just a band-aid. Link to comment Share on other sites More sharing options...
GB_Amateur Posted January 9, 2020 Share Posted January 9, 2020 22 hours ago, kac said: The GB knob on my Tejon is super loose now.... When I got my (used) Tesoro, the weakness I noticed was that the knobs don't lock and can be bumped. Here, IMO, is the best solution and will hopefully last a lifetime. It's multi-turn and lockable. You can buy just the knob or the knob and the potentiometer. I think the one I've linked is < 1 inch diameter (spec says "22.8 mm"). If you Google search "H-516 knob" you'll find a lot of them and may be able to choose your favorite supplier, etc. and/or a better price. The photo below is the H46 which is twice the diameter(!) but still the same design. 2 Link to comment Share on other sites More sharing options...
kac Posted January 9, 2020 Author Share Posted January 9, 2020 That is a good idea. Detecta was spot on with a rubber washer. I looked for my box of o rings and couldn't find one so I cut one out of some rubber sheeting on my laser 8mm with 4 mm center and it works perfect now. Rubber I used was for a roof, I use pieces as digging mats as they don't stay wet and don't blow around in the wind. Makes a really sweet seal and should last much longer as it is weather resistant. Probably overkill :) 1 Link to comment Share on other sites More sharing options...
Noah (FL) Posted January 10, 2020 Share Posted January 10, 2020 The blue 3 3/4turn pots that Tesoro used for GB are usually the only option for that size and sometimes can be hard to get a hold of. It might even be possible that Tesoro was the only ones ordering enough to keep them in production??? Last year I tried to find a couple for a Compadre experiment and ended up finding one on eBay. Link to comment Share on other sites More sharing options...
kac Posted January 10, 2020 Author Share Posted January 10, 2020 Do you remember the part number on the original? I could fish around and ask some suppliers if they have or know where to get those. I have seen 5 and 10 turn pots too but thinking our thumbs would get tired trying to gb them :) Link to comment Share on other sites More sharing options...
Noah (FL) Posted January 10, 2020 Share Posted January 10, 2020 3 hours ago, kac said: Do you remember the part number on the original? I could fish around and ask some suppliers if they have or know where to get those. I have seen 5 and 10 turn pots too but thinking our thumbs would get tired trying to gb them ? Not sure on part number but it’s a 3-3/4 turn Cermet 100K?? I believe. Mouser was out of stock when I last looked. The 10 turn is great for GB as it’s a much finer adjustment but they are a TIGHT fit in those uMax housings. 1 Link to comment Share on other sites More sharing options...
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