----- Original Message -----
From: "Stuart Ellis" <stuellis@mediaone.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Sunday, November 12, 2000 3:36 PM
Subject: Re: [MV] Can't bleed air from system in 1009
> Hi all!
> Well, I am stumped. Hooked up shop vac to air bleed valve on fuel
filter.
> I could not even get fuel to come out that way. How could this be? Could
> this happen if fuel pump installed wrong? How can it be installed wrong?
> I had tried cranking first to bleed air, but that didn't work. I can't
see
> any other way but to have it towed to a dealer. This is turning into a
> money pit. Not only is it hard starting, now it won't run at all.
I used an electric fuel pump once as Andy suggested you use the shop-vac,
and found that no appreciable amount of fuel could be coaxed out of the
bleed hose (with the valve undone, of course) unless the engine was being
cranked simultaneously by a press-ganged acquaintance (presumably due to
one-way valves in the lift pump? I've never seen an internal drawing.) Pull
your glow-plug card or disconnect each individual glow-plug. Make sure your
main pump solenoid wire is disconnected (the 'big' terminal), but run a 12V
jumper to the second terminal on the pump which will open the 'cold-advance
solenoid', and allow diesel to travel unimpeded through the pump and down
the return line back to the tank (you could disconnect the return line from
the front of the pump to verify the diesel is making the trip, and let it
drain into a suitable container.) Once you have flow established, you can
tighten down your bleed screw, hook up the return line (if you disconnected
it), reinstall your glow-plug card or hook up your plugs - remove the jumper
lead - and you should be able to start it.
Each time I've not been successful in bleeding a system, or air was
reintroduced at some point following, it's been because:
1) Rubber fuel hoses running under manifold were leaking
2) Hose clamps were loose
3) Steel fuel line against frame (M1010) had pinholed
4) Lastly, and most commonly, fuel bleeder screw was not seating properly in
filter-housing body! (three of these, unfortunately.)
I've found a spare electric fuel pump and a couple of lengths of suitable
hose invaluable in troubleshooting, priming sytems, and rescuing trucks from
mid-spans of bridges during rush-hour (long story.)
Andy Hill
MVPA 9211
Vancouver, B.C.
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