Temps

[Mike McMahan]

Thanks to everyone for their responses. I just spent the last three
hours cleaning the radiators on the bus. It only has 88000 miles on
it so I did not expect to find much but I was wrong. I took the
grill off and cleaned everything I could get to with greased
lightning, Then low pressure water. After about two cleanings really
nasty water running on the ground I thouoght it was pretty clean.
After looking a little closer I removed the ac cooler and behind it
on the ari cooler it was really nasty. After cleaning this I put it
all back together and started the engine. There is a noticeable
difference in the amount of air being pulled thru the radiator.
There were no real symptoms of any of this being clogged up, bus ran
fine and at proper temps. I knew that going to Denver the high
altitude air is enough thinner that it can reduce your cooling
efficency. Thanks again, Mike Mcmahan 96 42' Wanderlodge


--- In WanderlodgeForum@yahoogroups.com, Leroy Eckert
wrote:
>
> Hi Mike. I was trying to help Glenn on his '86. I do not know much
about the later models except some have a system with aux fans and
the Alarmstat is called something else.
> However, my fan relay and fuse circuit is exactly the same as
Pete's including the id numbers.
> Sometimes these days my reading comprehension is suspect.
> Leroy Eckert
> 1990 WB-40 Royale
> Danlonega, GA
> Smoke N Mirrors
> --- On Wed, 6/18/08, Mike McMahan <mmcmahan@...> wrote:
> From: Mike McMahan <mmcmahan@...>
> Subject: [WanderlodgeForum] Re: Temps
> To: WanderlodgeForum@yahoogroups.com
> Date: Wednesday, June 18, 2008, 10:12 AM
>
>
>
>
>
>
>
>
>
>
>
> Thanks Leroy. I guess I can't type either. 96 42'
Wanderlodge
>
>
>
> -- In WanderlodgeForum@ yahoogroups. com, Leroy Eckert
>
> Wanderlodge< jwasnewski@ ...> wrote:
>
> >
>
> > This is related to a 1990 WB-40.
>
> >
>
> > If your coach has an electric fan override yours should be
similar
>
> but not necessarily identical. I have read that certain early
models
>
> operate the fan with an air valve as opposed to electric.
>
> >
>
> > The small radiator that sits on the bottom of the main radiator
is
>
> a Hayden and cools the power steering and hydraulic fan oil. There
>
> are three filters in the oil reservoir and one Parker canister in
>
> line filter on the roadside.
>
> >
>
> > If you follow the water hoses they should go to heat exchangers
for
>
> the tranny and engine oil possibly from a manifold on the road
side.
>
> Radiator water cools the engine and tranny oil.
>
> >
>
> > Fan operation if yours is Alarmstat electric control.
>
> > The fan operates in idle(approx. 300-500rpm)except as follows:
>
> > Alarmstat turns on the fan to high mode at 195 degrees and cycles
>
> it to low mode at about 188 degrees. You should be able to see this
>
> happen on the water temp gauge while driving. If the temp is not
>
> reduced to 188 degrees the fan remains in high mode until temps
reach
>
> the lower value of the Alarmstat. The Alarmstat is located at or
near
>
> the water pump in the water jacket. It is a bulb looking instrument
>
> with two wires. This unit is designed to default to fan high mode
in
>
> the event of failure. Your fan operating in high mode at all times
>
> could be due to a failed Alarmstat(likely) or the Alarmstat has
been
>
> removed by a PO. or a problem with a a/c/fan relay(unlikely) While
>
> stationary at idle have someone operate the fan override and/or
>
> chassis a/c and see if the fan speed changes. There is a very
>
> noticeable difference.
>
> >
>
> > With the chassis a/c or fan override on the fan runs in high mode
>
> until either or both are switched off. Switching either one on
takes
>
> the Alarmstat out of the system and runs the fan on high.
>
> >
>
> > My understanding is that engine idle speed provides more than
>
> adequate fluid volume to operate the fan on full high mode.
>
> >
>
> > My fan enable relay is in the lower load center on an ignition
>
> circuit.
>
> >
>
> > You need to find someone with 1986 prints for your records. I bet
>
> someone out there has a set. I have a fan circuit diagram for my
>
> coach if you want a copy. It may not be identical to your coach.
>
> >
>
> > Leroy Eckert
>
> > 1990 WB-40 Royale
>
> > Dahlonega, GA
>
> > Smoke N Mirrors
>
> >
>
> > --- On Wed, 6/18/08, putneyflash@ ... wrote:
>
> > From: putneyflash@ ... >
> > Subject: Re: [WanderlodgeForum] Re: Temps
>
> > To: WanderlodgeForum@ yahoogroups. com
>
> > Date: Wednesday, June 18, 2008, 7:34 AM
>
> >
>
> >
>
> >
>
> >
>
> > Not to butt in, But the Fan/steering pump is either a gear or
vane
>
> pump and both depend on Rpm's to move oil, so there comes a point
>
> where you must have high rpm's to get the maxium flow to turn the
>
> hydraulic motor at its maxium, speed.
>
> >
>
> >
>
> > --
>
> > RE
>
> >
>
> > ------------ -- Original message from "Glenn Allen" : -
-
>
> ------------
>
> >
>
> >
>
> >
>
> > Pete,
>
> >
>
> > Good Summary. Can you or someone elaborate on the following
>
> > questions I have about the areas of your post noted below
relative
>
> > to a 1986 PT-40 6V92.
>
> >
>
> > Thanks,
>
> >
>
> > Glenn....(see questions noted below your comments):
>
> >
>
> > > The transmission cooler is in the bottom of the
>
> > > water radiator. The other radiator you see is not the
>
> > > transmission cooler. (I don't think it even has a fan.) The air
>
> > > flow through the transmission cooler is from the main radiator
>
> > > fan.
>
> >
>
> > 1a) There is a small radiator attached on the outside bottom left
>
> of
>
> > the main radiator that has hoses running to the power stearing
>
> fluid
>
> > cannister. I assume this small radiator is cooling the fluid for
>
> > power stearing and the hydraulic fan. There is also a round
>
> > cannister down low that is between the driver's side of the
engine
>
> > and the main radiator with large diameter (3"+) hoses from the
>
> > radiator and engine. There are also lines
>
> > from the transmission.
>
> > I'm assuming this is the transmission heat exchanger. I would
>
> > assume water is flowing from the bottom of the radiator to the
>
> > transmission cooler and then to the engine. Is this correct?
>
> >
>
> > 1b)I notice on this transmission cooler there are plugs on each
>
> > end. Do these plugs drain the water or transmission fluid from
the
>
> > heat exchanger (or maybe both)?
>
> >
>
> > 1c)Should this transmission cooler be cleaned or serviced?
>
> >
>
> > > I think it comes on at 190 or so ... or whenever you turn on
>
> > > the "fan override" switch
>
> > > or turn on the dash AC.
>
> >
>
> > 2a) I believe my fan is "always on". When the engine temp is
cool,
>
> > the AC is off, and the fan override is off, should the fan be
>
> > turning at idle speed or stationary?
>
> >
>
> > 2b) Is the speed of the fan proportional to the engine RPM?
>
> >
>
> > 3b) Where is the relay that the fan override switch controls?
>
> >
>
> > Thanks for your insight.
>
> >
>
> > Glenn Allen
>
> > 1986 PT-40
>
> > Mar
>
> > ietta, GA
>
> >
>