Engine & Tranny problems 2

[truitt44@...>]

On my 86 PT 40, 8V92 does the alarmstat that kicks the cooling fan in high also
turn on the squirrel
cage fan over the engine.
Howard Truitt
Camilla, Ga.
86 PT 40



> From: "Leroy Eckert"
> Date: 2007/04/26 Thu AM 09:33:07 EDT
> To:
> Subject: Re: [WanderlodgeForum] Re: Engine & Tranny problems 2
>
> That oil temperature is the absolute maximum allowable according to my
literature. My oil temperature routinely ran 235-240 on the flat until I made a
single change. While I haven't been able to pull a grade of any consequence I
have seen temperature reductions across the board on the analog gauges.
>
> My set up is this: The radiator. In front of that is an a/c condenser and the
oil cooler for the power steering and the hydraulic fan itself. The coolers
cover a major part of the radiator cooling surface. Water from the radiator is
dispersed to the tranny, retarder and engine oil cooler heat exchangers through
a manifold to cool the units. As water temp increases so does the temperature
of those units.
>
> Earlier model BB's with the a/c condenser on the roof have the benefit of
cooler air ( road surface temperature, and that can be very hot) passing over
the radiator(ie.ours cools the condenser first and then cools the radiator with
the same road surface air.) That indicates the air going through our radiator
is proportionately hotter than on earlier models. You can cut off the chassis
a/c or increase the air flow which you are doing with the fan override. In
theory, once water temperatures reach 195 degrees the Alarmstat should place the
fan in high mode and keep it on until temperatures back off to about 187 degrees
at which time the fan goes to idle mode. If it never gets to 187 the fan should
continue running full force and yield the same results as the fan override.
>
> I'll post my temperatures Tuesday after our run to Talladega. They will be
actual realtime temps taken off the VMSpc from the DDEC as it is receiving them.
I have been jacking around with my system through the winter and am interested
to see the results.
>
> Your cooling issue could be the Alarmstat or a combination of that and the
radiator. I am currently working on the plumbing for my radiator water flood
system just in case I need it. MH gave me that idea. If I lived in the
Mountain West I for sure would have a waterflood system to pull the mountains.
>
> I'm using a 190 degree Alarmstat now.
>
> Leroy Eckert
> 1990WB-40"Smoke N Mirrors"
> Niceville, FL
>
>
>
>
> ----- Original Message -----
> From: ronmarabito2002
> To: WanderlodgeForum@yahoogroups.com
> Sent: Wednesday, April 25, 2007 9:56 PM
> Subject: [WanderlodgeForum] Re: Engine & Tranny problems 2
>
>
> I've been suspicious that that could be the problem also, but with the
> fan on manual, the water temp is just fine and only gets to about 195
> when pulling a real good grade. The oil temp is more of a concern
> though and could be related to part of the radiator not cooling and
> can't handle the build-up. On a good grade, the oil temp is reaching
> around 250 degrees. Of course, we don't know how good the analog
> guage is either.
>
> R.E. (Ron) Marabito, Dallas, TX 92WB40
> Currently in Monticello, Utah.
>
> --- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert"
> wrote:
> >
> > I'm happy to hear you are back rolling along. Did you pick up a bad
> load of fuel?
> > Running a little warm. It sounds like you were not using the
> chassis air. When you get ready and before pulling the radiator I'll
> tell you what I did on my coach. I imagine the systems are similar.
> I'm leaving on a trip tomorrow and will chart temperatures taken from
> the DDL through VMSpc and report them Tuesday.
> > I had been running a little warm and the problem turned out to be
> the Alarmstat not working correctly.
> >
> > Leroy Eckert
> > 1990WB-40"Smoke N Mirrors"
> > Niceville, FL
> >
> >
> > ----- Original Message -----
> > From: ronmarabito2002
> > To: WanderlodgeForum@yahoogroups.com
> > Sent: Wednesday, April 25, 2007 6:33 PM
> > Subject: [WanderlodgeForum] Re: Engine & Tranny problems 2
> >
> >
> > Thanks Dan for posting the update.
> >
> > I got the coach back on the road yesterday a few dollars poorer, but
> > not as bad as I thought it might be.
> >
> > Clogged fuel filter was the primary power problem. They finally
> > decided that unless they could duplicate the electrical anomolly, they
> > were unable to diagnose the cause. They couldn't duplicate the tranny
> > light flashing when turning left. First left turn I made after
> > departing the shop, Bingo, the flashing light. They said to ignore
> > the ECM Fault Code for now as everything seems to be running just
> fine.
> >
> > I am running a little warm and have put the fan in override mode to
> > make sure I keep temps under control. I've just about decided that I
> > have a radiator core replacement in the near future. With two other
> > cooling units in front of the radiator, it is very difficult to get
> > infra red temps around the radiator.
> >
> > The two house batteries that tested bad have been eliminated from the
> > bank, so I now have the use of the other (6).
> >
> > Today, I never got the tranny light when turning hard left. We'll see
> > how long that lasts.
> >
> > Then also today moving north on Hiway 491 towards Shiprock, in the
> > four corners area, a gravel truck passed me going the other way and I
> > got 11 hits on the windshield. The driver side will definitely have
> > to be replaced.
> >
> > This is beginning to be the trip from Hell. Hope things settle down.
> >
> > R.E. (Ron) Marabito, Dallas, TX 92WB40
> > Currently in Monticello, Utah and planning to play golf tomorrow.
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
> > wrote:
> > >
> > > Thanks for the update Dan.
> > >
> > > Safe travels,
> > >
> > > Ralph and Charolette Fullenwider
> > > 84FC35
> > > Ralph's RV Solutions, Duncan, Oklahoma
> > >
> > > At 08:28 PM 4/24/2007 +0000, you wrote:
> > > >Ron and Shirley are back on the road and headed towards Gallup NM.
> > > >Ron will give a update when he has internet access.
> > > >
> > > >Dan, Albuquerque NM
> > > >BB BMC 37'
> > > >
> > > >--- In WanderlodgeForum@yahoogroups.com, "ronmarabito2002"
> > > > wrote:
> > > > >
> > > > >
> > > > > Just talked to the shop. Nothing on the electrical at this
> point,
> > > >but
> > > > > they found low fuel pressure, changed filters. I had asked
> them to
> > > > > change the air filter anyway, because it was needing it.
> > > > >
> > > > > They found a hole in one of the turbo boost pipes and
> repaired it.
> > > > > That alone could have caused some of the power loss. It says
> > > >nothing
> > > > > about the crazy throttle response where at full throttle, we
> only
> > > >got
> > > > > 1900 rpm and when backed off, we got the full 2200 rpm.
> > > > >
> > > > > They are getting ready to go do a new throttle response test and
> > > >power
> > > > > test. I will talk with the manager shortly to see about
> having the
> > > > > batteries isolated and tested.
> > > > >
> > > > > More info a little later. I will not have internet in a little
> > > >while,
> > > > > so I may have to update you when I can find service.
> > > > >
> > > > > R.E. (Ron) Marabito, Dallas, TX 92WB40
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
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