I have one pin on my tractor front end loader that won't take grease.
I have checked the nipple and that the hole through the pin is clear. I've tried using a grease hammer with white spirit and I've tried heating it up with a gas torch. All to no avail.
It's a through pin secured by a through roll pin which is of course itself stuck so currently I can't drive the main pin out.
It doesn't have a hard life so leaving it could be an option but that doesn't sit well with my inner mechanic! So, all I can think of is to get really radical with the gas torch, what, to the point of cherry red? As I said, it's working ok atm so I don't want to *** it up!
I would welcome any other suggestions that have worked for you in the past.