Here is what I did on that P-series cap. It has held well for a couple of years now. I just used a pen tube, small finishing nail for a stand (and to keep the inside of the tube clear) and a couple generous rounds of Seal-All to bed it in. My finest redneckery.
When I open the cap after it starts struggling, it oils fine for a bit. I pulled the pump off, checking the gears, gasket, pick up and so forth. Pump seems sound. But, there sure gets to be a lot of crud that gets packed on that cotter pin. Probably a combination of lots of oil (initially) and the super fine bark/pitch dust that is common on the wood I cut. At least the patties of funk I scrape off from under the cover make good balls of fire starter.
When I open the cap after it starts struggling, it oils fine for a bit. I pulled the pump off, checking the gears, gasket, pick up and so forth. Pump seems sound. But, there sure gets to be a lot of crud that gets packed on that cotter pin. Probably a combination of lots of oil (initially) and the super fine bark/pitch dust that is common on the wood I cut. At least the patties of funk I scrape off from under the cover make good balls of fire starter.