Why the engine replacements?

[ronmarabito2002]

Greg:

You have no or negligable back pressure in a diesel. This works
fine on a gasoline powered engine, but not a diesel. You need a
retarder of some sort.

R.E. (Ron) Marabito, Dallas, TX 92WB40

--- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
wrote:
> Phil you and many of the operators that read this forum know about
> over rpm damage but I think it deserves to be pointed out that you
> can cook a motor by over rpming "r'ing" on a down hill with your
> foot off the fuel. by using back pressure in the motor and a
lower
> gear I never let the r's go over 2,000 before I ride the brakes
> slowing the r's to 1,800. on a down hill I flip the fan overide
> switch which puts a load on the engine and helps to keep it in the
r
> range. One other reason I think the engines are swapped inplace
of a
> rebuild or inframe repair is ;A coach sold with unknown engine
probs
> is sold so low $ that a reman swap is cost effective and gives the
> new owner peace of mind. I run the limits on oilchanges, I dont do
> sampling because I dont want to spend the $ or see the results, I
> stopped using additives after Rogain failed me back in the 80's.
It
> may be wise to do all the over maintaining things but as Jeff
Miller
> points out doing the right maintainance at the proper time is
key.
> Greg
> Bald in California
>
> --- In WanderlodgeForum@yahoogroups.com, "Christina Corpus"
> wrote:
> > Greg,
> >
> > I agree with you that low mileage motors probably weren't
replaced
> > because they were worn out. More a matter of something breaking
due
> > to misuse.
> >
> > Lack of knowledge on how to operate a heavy diesel powered
vehicle
> > (over- taching the RPM's or lugging it down) results in an
expensive
> > lesson. Good reason to read the operator manuals.
> >
> > When my wife and I are looking at cockpit photos of units for
sale,
> > she kids me about, "it's got all of the guages you want." I
tell
> her,
> > "the more, the merrier." All those guages tell me what is
happening
> > under the dog house and floor boards.
> >
> > Keep the R's up and temp down.
> >
> > Phil
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
> > wrote:
> > > Phil, I just bought a 94pt40 last month and started looking
two
> > > months prior. I too found it unusual that low mile birds had
new
> > > engines. I have several dump trucks with over 400,000 and
drive
> > them
> > > hard off road and they have the orig powerplants. The 3208
Cats
> > are
> > > not a sleve cylinder engine and an inframe is not possible but
> with
> > > such low miles I dont think they ever get worn out. I think
> > > operators are over tacking the Cats or lugging them and burning
> > them
> > > up. The 4 and 5 allison gives less room for mistakes then a 10
> > speed
> > > manual shift. I have a 8v92 detroit and let me tell you that I
> have
> > > alot to learn as I try to keep the r's up and the temp down. I
> > look
> > > at the gauges and once in a while I look at the road. It is
hard
> > to
> > > climb a hill and keep the trans from down shifting to a lug
with
> > only
> > > 5 speeds to use. I think the detroits were just driven wrong.
> Cant
> > > go wrong if you get a bird from Miller coach works or Randy
> Dupree,
> > > wish I did.
> > >
> > > Greg O'Connor
> > > 94pt40 CAlifornia
> > >
> > >