Fuel Filter Fittings and Hoses

[RBridenbaugh]

After reading several threads about filtration, I’ve started to look into more particulate and water removal filtration for my fuel system.

I’ve looked at several kits that are out there and noticed there are differences between how the kit components are used vs. vendor design specifications. For example the hoses that are chemically compatible with diesel and specify Parker series 82, Push-Lok hose fittings have a little footnote in one bulletin that states they are not for use with diesel over 100 ºF and/or 100 psi, and must use a crimp type fitting. In another bulletin it just states not to use the 82 series and used a crimp type for diesel fuel. Yet most of the filter and big hose kits use them. They are the fittings with the yellow band and look like this:



The specifications for the hose with fitting is 300 psi working pressure and up to 200 - 300 ºF depending on the hose used, when using hydraulic fluids. The max output pressure of the fuel transfer/lift pump is significantly lower than this and the working pressures that have been posted on this forum are even less, so used under these conditions may not be an issue.

For those who have run these kits for a while, anyone have a problem with these hose connections or leaking?

Are you monitoring differential pressure across the filters or just the pressure into the fuel pump/gear pump attached to the fuel injection pump after all the filters?