SOHC.co.uk Forums > CB350/400
Alternator dismantling as case needs painting
Laverdaroo:
Ted,
I had the same issue with the coil connectors on my old thing too. In the end I used a tiny bit of weak acid (Hydrochoric) or muriatic whichever side of the pond you're from. About a 30% mix.
just dipped them in for a minute and then rinsed in clean warm water and they came up like new with no tarnish on them. With wiring this old you have to do all you can so when pushed together for belt and braces they get a squirt of electrical contact cleaner as well. If I'm fitting new connections I'll always tin the wire and so on. Leave no errors then you dont have to revise your Anglo Saxon vocab whilst you're trying to find a bad connection as they simply dont appear..................(touch wood :o)
There's a fair bit about it on the net which is where I got my recipe from. Some use lemon juice or vinegar as the acid but i didnt have much luck and the terminals went tarnished quite soon afterwards. The muriatic was brilliant. If you cant find any go to the builders yard and get a bottle of drain cleaner, (£5) it should have a percentage concentration that you can adapt with distilled water or just council pop, its only for cleaning so as long as there's enough 'umph' in the acid, it should do what you want. Incidentally, if you need to do an acid etch or simply get all the paint off anything, give it a dunkj in that and watch oit fizz away, really satisfying! ;D
Just do it somewhere ventilated as the bi product is Hydrogen gas and not only will it rust anything in the workshop thats bare metal, it knackers yer chest also and will make you cough like a donkey if you get a lung full so always do it outside and cover your eyes and hands, its nasty stuff................Just dead useful 8)
McCabe-Thiele (Ted):
--- Quote from: Laverdaroo on October 14, 2021, 01:41:18 PM ---Ted,
I had the same issue with the coil connectors on my old thing too. In the end I used a tiny bit of weak acid (Hydrochoric) or muriatic whichever side of the pond you're from. About a 30% mix.
just dipped them in for a minute and then rinsed in clean warm water and they came up like new with no tarnish on them. With wiring this old you have to do all you can so when pushed together for belt and braces they get a squirt of electrical contact cleaner as well. If I'm fitting new connections I'll always tin the wire and so on. Leave no errors then you dont have to revise your Anglo Saxon vocab whilst you're trying to find a bad connection as they simply dont appear..................(touch wood :o)
There's a fair bit about it on the net which is where I got my recipe from. Some use lemon juice or vinegar as the acid but i didnt have much luck and the terminals went tarnished quite soon afterwards. The muriatic was brilliant. If you cant find any go to the builders yard and get a bottle of drain cleaner, (£5) it should have a percentage concentration that you can adapt with distilled water or just council pop, its only for cleaning so as long as there's enough 'umph' in the acid, it should do what you want. Incidentally, if you need to do an acid etch or simply get all the paint off anything, give it a dunkj in that and watch oit fizz away, really satisfying! ;D
Just do it somewhere ventilated as the bi product is Hydrogen gas and not only will it rust anything in the workshop thats bare metal, it knackers yer chest also and will make you cough like a donkey if you get a lung full so always do it outside and cover your eyes and hands, its nasty stuff................Just dead useful 8)
--- End quote ---
Interesting use of the Brick Acid - I'm going to try white vinegar first & see how it looks before I try HCl.
I use white vinegar to descale our kettle - it works a treat in around 10-15 mins. Going back to the old days you could clean an old penny in ordinary vinegar but it took a couple of days.
Nurse Julie:
Dip in Cillit Bang limescale remover or Rubbing Alcohol. Push cotton bud down inside to remove the crud once softened
McCabe-Thiele (Ted):
--- Quote from: Nurse Julie on October 14, 2021, 03:51:45 PM ---Dip in Cillit Bang limescale remover or Rubbing Alcohol. Push cotton bud down inside to remove the crud once softened
--- End quote ---
That Cillit Bang is good even around the house - worth a try plus cotton buds are just the right size.
Laverdaroo:
No, not brick acid, thats not bad for cleaning stuff and prep on parts for plating but the percentage isn't there to do much. Drain cleaner as its Hydrochloric, soon as you dip steel in it it fizzes like buggery and strips everything. I get a litre for about £8 at the builders merchants. Its only battery acid and a few other bits n bobs to thin it out, works a treat on stubborn anything. There's plenty on you tube on its uses, quite interesting.
Like Julie said, 'cilit boing's' rather nasty too so that works. Citric acid, anything like that. I only use this as I have some in a bath for getting 40 years of farm muck off bike hubs and bigger bits of bike on strip down etc.
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