We went to work in Germany and I didn't use it for four years. I loaned it to my son in law and he used all the line up and the gas... I honestly have only spent about an hour trying to put new line on. I was just looking for a quick diagram or instructions on how to put new line on. I did it several years ago, but I will keep working on it. Thans in advance if anyone would like to take the time to give me a quick hand. I appreciate it.
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Here is a diagram of the trimmer: Homelite D830SD Parts List and Diagram - (UT-20621) : eReplacementParts.com (http://www.ereplacementparts.com/homelite-d830sd-ut20621-trimmer-parts-c-18807_20299_20876.html) Don't know if it will help.

They have a tool forum if no one answers here.