MIDNIGHT RIDER
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I like the idea of adding the shut off valve.
Where should I install it, before the filter or after?
I'm thinking it will be better after the filter so it will not spill diesel coming back from the line at the time we are changing the element. I'm thinking also about air in the fuel line.
Once you changed the element how do you purge the air out?
Do you screw back the bowl filled with diesel?
Burt.
It is best to have a valve on both sides of the filter.
These need not be right at the filter itself, so long as you can close the lines somewhere before and after to prevent fuel siphoning and spilling everywhere.
It is best, easiest, and most convenient to just go ahead and put both valves right at the filter, though.
As for pre-filling the filter, It is nigh impossible to completely pre-fill the bowl, on account of the element pushing the fuel over the top of the bowl and spilling it everywhere.
I fill the bowl about half full and let siphon action plus the auxilliary electric-pump do the rest.
Lacking an electric-pump, one could install an upward-pointing TEE, to which is attached a hose that proceeds upward to a funnel-accessible location.
The filter/bowl can be serviced, then a funnel poked into the hose and fuel poured in until full.
Of course, a shut-off valve would need be employed that closes off the hose.
Such an arrangement could also be employed to bleed off the air and would replace the set-up described below.
To bleed off trapped air, I installed an upward-facing TEE in the filter outlet, along with a 1/8"-NPT bleeder-valve.
I have plans to replace that bleeder-valve with a length of hose that proceeds to a "chamber", located somewhere up high, with the bleeder located in the top of this chamber.
Thus, any air that may come along will find it's way upward into this chamber, collecting at the top, where I can bleed it away every couple years or so.
Actually, for you guys that are plagued with air-intrusion troubles, such an air-trap chamber could be employed just ahead of the injection-pump, thus eliminating all air woes.
