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Air dryer help!

Yahoo Message Number: 18133
Hi all,

We have a 1993 Affinity with a 3176 Cat, which we have owned for the past 8 years. At a rally the other week I was told the Air Dryer on the engine needs to be changed or serviced every year.
Although I have had several "full services" done over the years most of the time I just have an oil and lube at truck stops, so I really don't know if it has ever been checked. We are in Gillette Wyoming, and about to head for Oregon, so I took the coach in for a service and Air Dryer change/service at the local Cummins/Freightliner dealer. They told me after the work had been done that they had never seen a dryer like mine and didn't have the parts, so nothing was done.
I would be grateful if anyone has any knowledge of this dryer and how or where it is serviced or replaced?

Thanks,

Chris. #4952

Re: Air dryer help!

Reply #1 –
Yahoo Message Number: 18135
My Cummins shop told me the truckers run the dryer filters for hundreds of thousands of miles before changing, and that I should not be concerned about changing mine at 45K miles.

--- Chris Bradley eaglerider@...> wrote:

Quote
Hi all,

We have a 1993 Affinity with a 3176 Cat, which we > have owned for the

past 8 years. At a rally the other week I was told > the Air Dryer on the

engine needs to be changed or serviced every year.

Although I have had several "full services" done > over the years most of

the time I just have an oil and lube at truck stops, > so I really don't

know if it has ever been checked. We are in Gillette > Wyoming, and about

to head for Oregon, so I took the coach in for a > service and Air Dryer

change/service at the local Cummins/Freightliner > dealer. They told me

after the work had been done that they had never > seen a dryer like mine

and didn't have the parts, so nothing was done.

I would be grateful if anyone has any knowledge of > this dryer and how

or where it is serviced or replaced? >

Thanks,

Chris. #4952
Gene Clendenin

My mind works like lightning. One brilliant flash and it is gone.

__

Start your day with Yahoo! - make it your home page

http://www.yahoo.com/r/hs

Re: Air dryer help!

Reply #2 –
Yahoo Message Number: 18136
I just replaced our Bendix air dryer last month with 30K miles on an 01' Intrigue. CC send me the wrong filter but my Truck Sv. Center got the correct part in an hour. Trucks do go longer but at a price. The Truck Service center told me they most of the road service calls they get are from trucks that stop when the dryer stops air flow. The Air pump on the engine pumps fails and oil gets into the air and cloggs the dryer. The service call will bypass the dryer to get them rolling again. Then, winter comes and the brakes lock up or Freeze up, then they replace the dryer. We know clean dry air is the life of our leveling and brake system. Dryer replacement should be on your maintaince list and depend upon on your milage and comfort level. Bendix recommends 25K miles or annual. For me I think 25K millage or three years max.

Paul Cummings

01' Intrigue #11309

Quote from: Gene Clendenin\[br\
]

Re: Air dryer help!

Reply #3 –
Yahoo Message Number: 18142
I've asked CC technicians about the air dryer service interval several times at rally seminars and at the "Service" 800 number. The usual response is a puzzled look and a different answer (guess?) every time.
Only one time did someone actually investigate before calling me back with an answer: 60,000 miles; no time interval. I'm thinking maybe 50,000 miles just to be on the safe side.
The Coburg, OR Coach Care service price list (rev 1/04) suggests "RV manufacturer's recommendation" or 30,000 miles / 2 years. Listed costs for air dryer service: $126.95 (Bendix), $161.95 (Wabco), $226.95 (Midland).

When I tried to order air dryer service parts from CC last month I was told my coach had a Bendix air dryer.

I suppose service intervals may vary for different brands.
--

Tom Harsch 2002 Allure 36' #30791

Quote from: pcummings4
I just replaced our Bendix air dryer last month with 30K miles on

an

Quote
01' Intrigue. CC send me the wrong filter but my Truck Sv. Center > got the correct part in an hour. Trucks do go longer but at a > price. The Truck Service center told me they most of the road > service calls they get are from trucks that stop when the dryer > stops air flow. The Air pump on the engine pumps fails and oil

gets

Quote
into the air and cloggs the dryer. The service call will bypass

the

Quote
dryer to get them rolling again. Then, winter comes and the brakes > lock up or Freeze up, then they replace the dryer. We know clean

dry

Quote
air is the life of our leveling and brake system. Dryer

replacement

Quote
should be on your maintaince list and depend upon on your milage

and

Re: Air dryer help!

Reply #4 –
Yahoo Message Number: 18318
After sifting through a lot of conflicting service interval recommendations I decided to follow the Dynamax Chassis Owner's Manual maint. schedule: 50,000 miles (no time interval specified). Service now would give us about 5 years "peace of mind".

The service was done this week at a Rapid City, SD truck service facility - Godfrey Brake Service & Supply. The cost was $471 ($328 for parts, 1.5 hours labor). The air dryer on my coach is the Bendix AD-IP 12V model.

The Owner's Manual schedule lists desiccant cartridge replacement and several (labor intensive?) "Disassemble/Inspect/Clean" tasks to be performed. The actual service performed was: desiccant cartridge replacement, heater/thermostat replacement, and purge valve replacement. The last two items cost added about $200 to the parts cost, but probably reduced the "disassemble/inspect/clean" labor cost by quite a bit.
--

Tom Harsch 2002 Allure #30791

Quote from: Tom & Maxine Harsch
> I've asked CC technicians about the air dryer service interval

several

Quote
times at rally seminars and at the "Service" 800 number. The usual > response is a puzzled look and a different answer (guess?) every

time.

Quote
Only one time did someone actually investigate before calling me > back with an answer: 60,000 miles; no time interval. I'm thinking > maybe 50,000 miles just to be on the safe side.
> The Coburg, OR Coach Care service price list (rev 1/04) suggests "RV > manufacturer's recommendation" or 30,000 miles / 2 years. Listed > costs for air dryer service: $126.95 (Bendix), $161.95 (Wabco), > $226.95 (Midland).

When I tried to order air dryer service parts from CC last month I

was

Quote
told my coach had a Bendix air dryer.

I suppose service intervals may vary for different brands.
--

Tom Harsch 2002 Allure 36' #30791 >

[quote author=pcummings4"

> I just replaced our Bendix air dryer last month with 30K miles on > an

> 01' Intrigue. CC send me the wrong filter but my Truck Sv. Center > > got the correct part in an hour. Trucks do go longer but at a > > price. The Truck Service center told me they most of the road > > service calls they get are from trucks that stop when the dryer > > stops air flow. The Air pump on the engine pumps fails and oil > gets

> into the air and cloggs the dryer. The service call will bypass > the

> dryer to get them rolling again. Then, winter comes and the

brakes

Quote
lock up or Freeze up, then they replace the dryer. We know clean > dry

> air is the life of our leveling and brake system. Dryer > replacement

> should be on your maintaince list and depend upon on your milage > and

> comfort level. Bendix recommends 25K miles or annual. For me I > > think 25K millage or three years max.
>

> Paul Cummings

> 01' Intrigue #11309
>
>
>
>
>

[quote author=Gene Clendenin
>]
> > My Cummins shop told me the truckers run the dryer > > > filters for hundreds of thousands of miles before > > > changing, and that I should not be concerned about > > > changing mine at 45K miles.
> >

> > --- Chris Bradley wrote:>
> > > Hi all,
> > >

> > > We have a 1993 Affinity with a 3176 Cat, which we > > > > have owned for the

> > > past 8 years. At a rally the other week I was told > > > > the Air Dryer on the

> > > engine needs to be changed or serviced every year.
> > >

> > > Although I have had several "full services" done > > > > over the years most of

> > > the time I just have an oil and lube at truck stops, > > > > so I really don't

> > > know if it has ever been checked. We are in Gillette > > > > Wyoming, and about

> > > to head for Oregon, so I took the coach in for a > > > > service and Air Dryer

> > > change/service at the local Cummins/Freightliner > > > > dealer. They told me

> > > after the work had been done that they had never > > > > seen a dryer like mine

> > > and didn't have the parts, so nothing was done.
> > >

> > > I would be grateful if anyone has any knowledge of > > > > this dryer and how

> > > or where it is serviced or replaced? > > > >

> > > Thanks,
> > >

> > > Chris. #4952
> > >
> > >
> > >
> > >
> >
> >

> > Gene Clendenin
> >

> > My mind works like lightning. One brilliant flash and it is

gone.