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Promax 7 speed ATB hub with sticking freewheel

I have old Promax 7 speed ATB disc brake hub with sticking freewheel. Sometimes it spins freely, sometimes it catched and locks up. I have disassembled hub to try to remove freehub but it doesn't unscrew like a Shimano freehub. This is from an old Peugeot bike that was left outside for a long time in the rain, which I'd like to revive. I've heard that sticky freehubs can sometimes be freed up by flooding with lubricant. I've squirted lots of teflon spray (GT 85) into hub and lots of rust coloured lube runs out! Any suggestions gratefully received

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You will have to soak it with a lubricant that doesn't evaporate. It would be easier if you could remove the freewheel but you might have to soak a rag with penetrating oil mixed with a good quality chain oil and pack it around the freewheel and let it soak in. Spray lubes are good but you need something in there that will free up and lubricate the springs and pawls inside the freewheel. You might also try buying a micro lubricator at a good hobby store and squirting the lubricant in the crack where the locking nut is on the face of the freewheel. The micro lubricator looks like a hypodermic syringe. The thing that comes in refill kits for ink cartridges for printers would probably work too. The trick is to get the thicker viscosity lubricant inside the freewheel.

Research, Knowledge and Information :

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