I have a Just acquired 336 JD. Been setting inside for bout 5-7 years. Everything works fine as put bout 800 bales thru it. problem is I can t get the zerk for the twine disc to take grease. Ive changed it. Dug it out with small screwdriver. Soaked it with bout 3 diff lubricants. Took knotter bolt out and flipped it up so penetrating oil will set in zerk hole and let soak numerious times. Wont take grease. Dont think Im mecdhanically talented nuff to take disc out to check it out. Any one else had same prob. Ideas. Nu-B i AM. Thanx for any help you can share.