Mines died from lack of fluid !!! Don't really know where the fluid went ... 7 years old this year .... ?? Anyhow ~ I gots the manual off the MMT search feature and it said to add fluid ... I used the Mystic 30 .. 'cause it was the first on the list ... and trim motor gots to where as it wouldn't even hummmm ..... light tap with hammer and she went to hummmin' !!! It also went to back workin' just fine !!! 
I have a little knowledge of Hydrolic's .... you know high-preasure lines like on a tractor and such .... I just couldn't make mineself understand how this little 12volt pump ram works .... most 'specially on different types of fluid.