It should be somewhere on the top of the caliper. You didn't say what kind of ATV you had, but the picture below shows two calipers and I have circled the bleeder screws. The bleeder screws may or may not have the rubber covers, sometimes they get torn off.thank you! and where is the bleeder screw exactly? and how should i go about greasing the shaft? just take it apart?
I doubt if that will work. You can get rebuild kits for them, but if they're seized or about seized up, they're usually in such a bad shape on the inside that's it's better to just go ahead and buy another one. You can usually find them on Ebay pretty cheap.how should i go about fixing this? just some spray lube and work it in by moving it up and down?