The manual says to fill to the halfway point when the unit is at rest. However at that level when the unit is starting up you may not be able to see any oil in the sight glass. Our standard practice is to fill to approximately 3/4 of the sight glass so that when the unit is starting up you will still be able to see some oil in the sight glass.

@@pdblowers Thanks for the expert advice! I just changed and filled 1/2 way I’ll definitely add a bit more. Another question I have out of curiosity, would the vent blow out any excess in the case of overfill?

Hi Frank, check out this page on our website that outlines tips on what to do when your blower won’t turn: www.pdblowers.com/faqs/my-blower-wont-turn-what-should-i-do/

That is correct Chris. Starting in fall of 2016, Roots started using a synthetic NLGI No. 2 grease on all of their blower models. Whether you have a newer blower with the synthetic grease, or an older blower with the clay-based grease, the best way to maintain your blower is to continue using the same type of grease you have now. The two types of grease cannot be mixed because they could separate and cause the blower to no longer be properly lubricated. We have more information on our website about the two types of grease and how to tell which one is in your blower: www.pdblowers.com/faqs/type-grease-use-roots-blower/