Temps

[patticake592000]

Glen,
You have correctly identified the different radiators in your coach.
Pete has a dfferent type of engine and more radiators.
Your fan runs constantly with an faster speed controlled by a switch
on the dash that says "fan". If your water temp gets high you can turn
the switch on and "hopefully" pull the temps down. On mine(8V92), I
had to replace the radiator(another story).
Also, my engine only holds 6 1/2 gallons. Yours will probably hold
less. Use 40wt. oil ONLY in your engine.
On changing the trans fluid, do you know when the last time it was
changed? Smell it, does it smell burned? If so, change it. Remember,
we have a retarter in it, so it needs servicing more often.
Another item to check, the rear end fluid. I told the story of my
"simple" rear end fluid change that turned out different. You may not
have the miles I do, but you also don't know what the previous owner
(s) did as far as service.


Steve Gureasko
90WBWL40 Jus Chillin
Ponchatoula, La.

[Mike McMahan]

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, 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 Robinson]

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@hot.rr.com">:

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%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

[Leroy Eckert]

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

[Mike McMahan]

Thanks Leroy. I guess I can't type either. 96 42' Wanderlodge

-- In WanderlodgeForum@yahoogroups.com, Leroy Eckert
Wanderlodge 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
>

[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
>

[Leroy Eckert]

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%40yahoogroups.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%40yahoogroups.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 >

[Pete Masterson]

My apologies -- I got Glen's message crossed up (in my mind) with another fellow who recently purchased a '96 PT-42 with the DD Series 60... so, most of what I said has nothing to do with a PT-40 with an 8V92.

Sorry...

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42

El Sobrante CA

"aeonix1@mac.com"

On Jun 18, 2008, at 5:06 AM, patticake592000 wrote:

  Glen,

 You have correctly identified the different radiators in your coach.

 Pete has a dfferent type of engine and more radiators.

 Your fan runs constantly with an faster speed controlled by a switch

 on the dash that says "fan". If your water temp gets high you can turn

 the switch on and "hopefully" pull the temps down. On mine(8V92), I

 had to replace the radiator(another story).

   Also, my engine only holds 6 1/2 gallons. Yours will probably hold

 less.  Use 40wt. oil ONLY in your engine.

 On changing the trans fluid, do you know when the last time it was

 changed? Smell it, does it smell burned? If so, change it. Remember,

 we have a retarter in it, so it needs servicing more often. 

   Another item to check, the rear end fluid. I told the story of my

 "simple" rear end fluid change that turned out different. You may not

 have the miles I do, but you also don't know what the previous owner

(s) did as far as service.

  Steve Gureasko

  90WBWL40 Jus Chillin

  Ponchatoula, La. 

[Pete Masterson]

The radiator grill has 3 special fasteners. The OEM version uses an allen wrench to turn. They're a little strange as they turn a metal tab, but are also spring loaded, so it takes several turns to turn the tap 1/4 of the diameter. (This is easier to do than to explain.)

On my coach, I replaced the three fasteners with stainless steel ones with a slot. (A quarter works perfectly to turn them.) The grill is a little 'fussy' to re-position as a metal tab at the bottom that holds it in place is a little tight.

The fasteners are held in place by two pop rivets each.

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42

El Sobrante CA

"aeonix1@mac.com"

On Jun 18, 2008, at 6:31 AM, Mike McMahan wrote:

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 

[Jack and Liz Pearce]

--- In WanderlodgeForum@yahoogroups.com, "Mike McMahan" <mmcmahan@...>
wrote:
>
> I'm fixing to take my first hot weather trip(to Denver) in our 96 42'
> Wanderlodge series 60 six speed towing my 28' race car trailer.
>


Howdy, Mike.
Jack and I are in Buena Vista, CO for the summer. If you get down this
way, we are staying at Valley Mobile RV Park on Highway 24.

We hope that you have a good trip. Travel safe.

Regards,
Jack and Liz Pearce
1993 WLWB
Buena Vista, CO