Why the engine replacements?

[Gregory OConnor]

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
> >
> >