Chassis heat problems

[Gregory OConnor]

If the T stat dont open maybe the recirculation is on the radiator
side of the engine and you are not getting engine heated coolant
untill the radiator sees the same????

Or the valve that needs votage to close is part of a loop that while
open (no volts) keeps heated coolant (when there is some) close to
the cockpit waiting or a command by the operator to sent it to the
chassis heater core???

GregoryO'Connor
94ptRomolandCa

--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
wrote:
>
> Well, it is back to the drawing board. The valve has been removed
and replaced, and the voltage tested. What I learned:
>
> The valve up front is a normally-open valve, closed by power
coming from the timing circuit. Plus 12 volts is fed down to the
valve, then back through another wire to (somewhere) that gets power
to the #12 relay. When the relay is powered, there is no power to
the circulation pump or the Sporlan valve.
>
> So, power on, both valves are closed, one by the presence of
power, the other by the absence of power, and the pump is off.
>
> When the valve was re-installed I left the power connection off,
so the valve was open (bench test had shown it working, and it was
left in the open position). When the key was turned on, the Sporlan
opened, and the pump ran continuously. The pump never faltered, but
nothing in the system got even warm to the touch (outside temp in
the 40s, engine about 160).
>
> I pulled the top of the pump off and managed to lose about 4
gallons of coolant in the process - certainly the supply side of the
pump is unobstructed! Replaced the gasket and reassembled, after
ascertaining that the pump runs well and there is no damage to any
of the impellor blades.
>
> Both gate valves are wide open, which I assume is the correct
setting (and I presume they should have been closed before I messed
with the pump!)
>
> Looking for new possiblities, if anyone has any ideas.
>
> Don Bradner
> 90 PT40 "Blue Thunder"
> Eureka, CA
>
> On 3/15/2008 at 5:52 AM Gregory OConnor wrote:
>
> >If you cant remove the valve maybe try and bypass it to see that
> >that is the problem first???? KevinMk did that with a remote air
> >regulator or somthing????
> >GregoryO'Connor
> >94ptRomolandCa
> >
> >--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
> > wrote:
> >>
> >> My concern is that the front valve may be the plug in the loop,
if
> >it is not opening. Temperature of the engine is not an issue - I
ran
> >it at idle today up to about 160 so that I would have it warm
enough
> >to be sure to feel the heat. All lines stayed cold, including the
> >top of the pump, until I allowed the pump to run open via the
> >dismantled Sporlan. Only took a couple of quarts of coolant
spilled
> >to heat up everything through the pump to the valve.
> >>
> >> On 3/15/2008 at 4:25 AM Gregory OConnor wrote:
> >>
> >> >Could be the pump works when not held against a closed
loop????
> >maybe
> >> >the return line is simply plugged up. or your fan is staying
on,
> >and
> >> >the detroit isnt getting hot??
> >> >
> >> >The camera trick is one CurtS taught me to do. I have even
taken
> >10
> >> >meg picks of part labels then was able to read them on the
> >computer
> >> >screen.
> >> >
> >> >When you look at all the controls and appliances exposed to
the
> >> >weather on these rigs it is a wonder that anything works.
> >> >
> >> >GregoryO'Connor
> >> >94ptRomolandCa
> >>
> >
> >
> >
> >------------------------------------
> >
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> >
> >
> >
>