Temps

[Mike McMahan]

Thanks Rob. MIke McMahan 96 42' Wanderlodge

--- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
wrote:
>
> Mike if your radiator grill is like mine you will have two screws
latches at
> the top which are turned with an Allen Key. Sometimes the paint is
thick in
> the screw heads so look closely and you should see the octangal
shaped
> holes. You loosen these counterclockwise and lift the grill cover
UP and
> OFF. It hooks on at the bottom while the two screw latches at the
top keep
> it in place
>
> 2008/6/18 Mike McMahan <mmcmahan@...>:
>
> > Thanks everyone for the responses. Pete you were right about the
> > retarder. I guess my old age and senility set in and helped me to
> > get my two coaches mixed up. I had not verified what the second
> > small radiator(it does have two electric fans mounted on it) did.
> > I'm going over to the bus this afternoon and will look. I have not
> > ever removed the outer grill that covers the radiator. If memory
> > seves me correctly the only fastener that I see on the outside of
the
> > grill is a pop rivet at the top. What is the procedure for
removing
> > the grill to clean the radiator? Thanks again, MIke Mcmahan 96 42'
> > Wanderlodge
> >
> > --- In WanderlodgeForum@yahoogroups.com 40yahoogroups.com>,
> > Pete Masterson
> > wrote:
> > >
> > >
> > > ===============================================
> > > Pete Masterson, Author of
> > > Book Design and Production: A Guide for Authors and Publishers
> > > Aeonix1@
> > > Aeonix Publishing Group http://www.aeonix.com
> > > ===============================================
> > >
> > >
> > > On Jun 17, 2008, at 10:46 PM, Glenn Allen wrote:
> > >
> > > > 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?
> > >
> > > I'd have to go out to the coach and take a look. I don't recall
> > the
> > > "canister" you mention (it might be there, but I don't recall
it).
> > > The bottom (1/4 or so?) of the water radiator is a radiator for
> > the
> > > transmission fluid. When my radiator core was removed, there
was a
> > > 'stub' radiator for the transmission fluid. The new core
attached
> > > above it. I no longer recall if water moved through some of the
> > tubes
> > > and transmission fluid moved through the other tubes or exactly
> > what
> > > the physical arrangement was.
> > >
> > > The second small radiator is for cooling the power steering (and
> > may
> > > cool the hydraulic fan fluid as well). The power steering
> > reservoir
> > > is a large canister on the curb side visible through both the
rear
> > > and side doors. Do not overfill it. If you do, it will coat
> > > everything nearby with oil. (And I'm not going back to that
place
> > for
> > > service again.)
> > >
> > > The fan pulls air through a 'stack' of radiators. You can remove
> > the
> > > grill on the street side and you'll see (I'm going by memory
here,
> > so
> > > bear with me) the AC condenser, and the Air Charge cooler.
Behind
> > the
> > > air charge cooler is the regular water radiator with the
> > transmission
> > > radiator in the bottom portion of it. You can't see the water/
> > > transmission radiator since it's fully covered by the Air Charge
> > cooler.
> > >
> > > Looking from the inside, you mostly see the fan and the metal
> > shroud
> > > that makes the fan more efficient.
> > >
> > > > 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)?
> > >
> > > Afraid I don't know. I have a 400+ page DD Series 60 manual (as
a
> > > PDF). Perhaps I can make a copy available to you if you'd like.
(I
> > > bought a CD with it on eBay.) I don't know if this manual
> > discusses
> > > the radiator set up in the coach (bus) as it's mostly focused on
> > > heavy truck installations. More likely this is covered in
Allison
> > > documentation -- I don't have any of that stuff beyond the
owner's
> > > manual.
> > >
> > > >
> > > > 1c)Should this transmission cooler be cleaned or serviced?
> > >
> > > The transmission fluid filters should be changed every 36 or 48
> > > months depending on the size of filters you have. (I have to
check
> > > this.) These are located in the transmission 'pan'. When the
> > filters
> > > are changed the transmission fluid is also changed. Use a
> > synthetic
> > > transmission fluid (I have Transynd). I don't think there's any
> > > specific service required for the cooler itself. You change the
> > > transmission fluid on the same interval as the filters. With an
RV
> > > you're going to probably "time out" rather than exceed the
> > suggested
> > > miles.
> > >
> > > Change the engine oil (and filters) every year or 15,000 miles,
> > > whichever comes first. A full oil change will take nearly 40
> > quarts
> > > (10 gallons) of oil. You can use a synthetic, if you wish, but
the
> > > change interval is the same. I have Rotella or Delo for heavy
duty
> > > diesel engines.
> > >
> > > There is a canister on the curb side that holds about 3 gallons
of
> > > oil and there's an automatic oil add system (requires air
pressure
> > to
> > > operate), if needed.
> > >
> > > >
> > > >> 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?
> > >
> > > The fan should be not turning or turning very slowly at idle
speed
> > if
> > > the engine isn't fully warm. They fan will run at full speed if
> > > _either_ the "fan override" or AC switch (the little button on
the
> > > automotive heat control panel) are on.
> > >
> > > >
> > > > 2b) Is the speed of the fan proportional to the engine RPM?
> > >
> > > Not that I'm aware of. I think it has two or three speeds.
> > Frankly,
> > > I've never paid much attention to the fan when it was operating.
> > I've
> > > verified that it works and I've seen the clouds of dust it kicks
> > up
> > > when it's on, though.
> > >
> > > >
> > > > 3b) Where is the relay that the fan override switch controls?
> > >
> > > Front load center, SK 68 is the fuse. Relay K39 says "Chassis
A/C
> > > Eng. Fan Enable" -- I don't see any other relay related to the
Fan.
> > I
> > > suppose that the fan override switch tickles the same relay as
the
> > AC
> > > switch.
> > >
> > > There area two other main Load Centers. One is behind the
cabinets
> > > above the dashboard (on the right). The cabinets have a false
back
> > > that pulls out, revealing the TV aerial wires and a load center.
> > > There's also a load center in the rear closet on the street side
> > > behind a felt-covered door.
> > > >
> > >
> >
> >
> >
>
>
>
> --
> Rob, Sue & Merlin Robinson
> 94 WLWB
>