If you are able to remove the fitting, clean out as much old grease that you can from the cap and the grease tube. Add fresh grease to the cap and re-install, tighten the cap to cover the threads . Keep an eye on it for every couple hours of use, and tighten the cap about 1 full turn for every 2 hours of use. Once it bottoms out, remove and refill the cap, and you should only have to advance/refill the cap about once a month. I'm pretty sure the correct number for the grease 154-YX. If the tube looks dry/empty, a little shot of grease into the tube will help !!