From: chance wolf (chance_wolf@shaw.ca)
Date: Mon Jan 12 2004 - 13:24:00 PST
----- Original Message -----
From: "Chris Stansbury" <chris_stansbury@hotmail.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Monday, January 12, 2004 12:37 PM
Subject: [MV] quite possibly have a serious problem with my 6.2L.... a long
story
> When I went to start my M1009, I noticed that I didn't
> hear the familiar putter of my inline electric fuel pump. Hmmm, I said,
and
> started it anyways. The pump had been making more noise recently and
would
> sometimes start working after a few seconds which I figured would happen
> this time.
Fuel could've waxed up with the cold and clogged the pump *but* if you've
simply replaced the manual pump with an electric and 'wired it in' to the
same spot as respects the fuel hoses - you're going to go through pumps.
They need a filter on the input side of the pump (i.e., supply side) or they
will have a short lifespan when coupled to the average military fuel tank,
as there's no filtering whatsoever before the fuel/water/tankcrud gets
sucked into the pump and sent on to the Stanadyne filter on the firewall.
I've been too lazy to put one on my own 1009 before the electric pump - but
have paid for it in pump failures (2). In fact, some of the NAPA-type
aftermarket pumps even come with a disclaimer that any warranties are null
and void if the pump is installed without a supply-side filter, so it's a
known concern.
Many, many have suggested installing a Racor-type cartidge filter/water
separator inline before the electric pump, but the recommended one for the
6.2's system is something obscene like $200 bucks. I guess it doesn't seem
like a bad investment now that I'm on the wrong side of two electric pump
failures - but still - ouch. I wonder if one could re-jig the system to
have the electric pump suck the fuel THROUGH the existing Stanadyne filter,
thereby getting the benefit of both the fuel heater and the water separator
before sending the fuel through the pump and on into the injector pump. The
only thing I can think might be a concern is a potential overall decreased
rate-of-flow in high demand situations, but without trying it, I really
can't say.
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