I appreciate being corrected by anyone who knows more about a subject than I do. Especially someone who is 20yrs older than I am. I knew that gear lube dispensers were called "lubesters" , but wasn't sure about oil dispensers. I simply Googled "Bennett Lubesters" and it brought up several sites to go for information. I realize that my search followed other's input of the word lubester combined with the brand name Bennett. So let's just blame the internet! Jack, will one of your manuals tell me the year my oil dispensers were made (by serial number), or will it only give me repair instructions and parts list? The pumps that I have both work well, I am just trying to determine their age. Once again thank you in advance for your help and knowledge. JP