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Many blame the grease gun or a dodgy nipple when the real cause is more likely old grease that has dried out and hardened inside the joint, preventing new grease getting to its target.
So your Christmas wish-list needs a grease joint rejuvenator from Innovative Products, USA, to help deal to the problem and bring the grease pathway into regular use.
The gadget drives light oil into a joint or pivot to break up hard packed material and allow fresh grease to be pumped in.
In practice the body of the unit is filled with light oil, connection is made to the offending nipple, and a hammer is used to compress a plunger which forces the oil into the joint. Repetition eventually creates a pathway which brings the joint back into use.
Each kit contains a professional rejuvenator, a pocket version for small jobs, and a 5-inch flexible extension, all housed in a moulded carry case.