T&T: Installing an electric fuel pump for priming and backup

[Robin Brueckner]

Others have covered most of the considerations relating directly to your
question. As one implied, installing a RACOR low may enable you to fill it via
gravity feed;otherwise the best approach is to fill with fuel after a filter
change as much as possible before assembly...its just not good practice to put
extra air in a diesel fuel system. shutoff valves on either side of your
filter are an ideal way to prevent possible syphoning during a filter change
but are unnecessary on many installations.

While you are down there, see if any copper tubing fuel lines need padding
through holes/bulkheads/etc...some hose vinyl tubing or some caulk is a good
way to prevent unwanted vibration and wear.

If your RACOR fuel filter is rated at sufficient GPH flow for your engine then
the size of the filter makes little difference except that 2 micron filters
will clog faster than say 30 micron. Conventional wisdom says use a higher
micron filter first (primary), a finer one later (secondary) to share the
debris load.

Conventional wisdom provides for a filter before the fuel pump to protect
it...hence the normal installtion of RACORS before engine lift pumps...but you
can probably do it either way if you don't have sludge problems.

I added water probes (alarms) and vacuum gauges to my RACORS by replacing my
original RACOR bowl with a more modern one...so if about two inches of water
accumulates in the filter bowl I get get an alarm before any water is drawn
into the engine system; the vacuum gauge provides feedback on filter
performance....they are a real nice addition for preventing trouble at
inconvenient times... Rob Brueckner1972 Hatteras YF for sale
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