Diesel leak in lower compartment

[timvasqz]

nozzle pressure is under 200psi not 1200psi proper flame requires
less than 7 psi dif from that spxt' for the model.

Greg ofTim&Greg 94ptca

--- In WanderlodgeForum@yahoogroups.com, "timvasqz" wrote:
>
> EricP, is there is a pony pump to lift the fuel to the injector
> pump??? it could be that a bad check valve is the problem, causing
> pump failure????? pump may be result, not cause
>
> the Aquahot did start out with a Wabasto burner. at the burner,
> diesel fuel is pressurized to over 1200psi. there is a selonoid
> valve on the exhaust side of the injector pump to assure the fuel
> spray at the injector doesnt dribble. A sequence in the control
> module runs the ipump up to build the pressure prior to an open to
> spray command. When the electric selonoid spray valve fails you
get
> dieselfuel smell at the burner when it is turned off because the
> pressure captured after ipump is dribbled out the nozzle. That
often
> will also prove white smoke burn off once the burner refires .
>
> If the ipump pressure is making its way back to the supply path
of
> fuel, it could do a couple of things. One is blow the check valve
in
> the pony/lift pump (if there is one)the other is cause a fine 1200
> psi spray in the supply path where there are hose clamps. the
supply
> to the aquahot may have a checkvalve in the tank pickup tube which
> will keep any wrong way pressure from being relieved by pissing
back
> in the tank.
>
> the same situation could happen if the lift/pony pump has a
backflow
> issue even independent of the ipump. ( but a failed backflow in the
> ipump would blow the ponypump dynamic and may even overcome a
> functioning pony backflow) the pony pump if any doesnt need to make
> any more than 10 psi. its not pressure that a pony pump provides,
its
> job is volumn and maintained delivery.
> Greg ofTim&Greg
> 94ptca
>
> --- In WanderlodgeForum@yahoogroups.com, "Eric Perplies"
> wrote:
> >
> > The 1996 Aquahot units had a problem with the fuel pump. The fuel
> > pumps leaked fuel. There was some sort of recall a decade ago in
> > which Vehicle Systems (the owner of Aquahot) provided labor and
> > material to replace the fuel pump. That time has lapsed.
> >
> > Remove the cover from the left side of the Aquahot (a milk run).
> See
> > if you have fuel on the pan under the burner. If you do have
diesel
> > there you could have a leaking fuel pump or of course a diesel
leak
> > elsewhere. I would clean the fuel pump up with a spray
> > solvent/cleaner then come back the next day and inspect things.
> >
> > Note: If the leak is in your Aquahot I would really recommend
your
> > trying to fix it yourself. The Aquahot is very easy to maintain
and
> > has an outstanding manual available. The manual will show you the
> > location of the fuel pump.
> >
> > Eric Perplies
> > 96 42 WBWL
> > currently in Fredericksburg, TX
> >
>