When the fan clutches on, it puts a big load on the engine and uses
25 hp. if you are climbing a hill and use all 250 horses ;then bump
on the fan, now 225 is at the driveline. The automatic 'fan on' is
prompted by heat so since the 3208 runs over 2800 rpm it is possible
that the fan will auto bump on at max rpm. Kinda think the jerking of
this abrupt startup is what kills the idler, bearings and belts.
I believe, Electric is a good way to supplement cooling and keep the
fan clutch from cycling so much. since you make juice with the alts
most all the time, use of the electric fan kinda plays in the hybrid
e-cars 'capture and deplete any energy' theory.
I have an air clutch on a truck (belt driven)that needed to be
rebuilt recently and I put in a two speed mod
http://www.kit-masters.com/ this should help in hp consumption of
the fan. I did it because I dont like the fan clutching on at high
rpm and think the abrupt clutch-up was the cause of 2 prior fan
failures. funny how running the fan causes more heat ( calories)
than no fan. My cummins fan come on maybe twice a 8 hour day where
temps are under 100. way diff than the auto tranny 500 hp bus.
folks who run the fan all the time often blow air over stagnent water
when thy close off the watervalve thermostat by making the water too
cool.
The tranny cooler unit in the 94pt is a heat exchanger where hot
transfluid gets coiled thru engine cooling fluid that just left the
bus radiator. the muffler looking heat exchanger heats the coolant
prior to the coolant cooling the bus engine. when the two units are
cooled thru the same system like that, it is important to learn what
heat producer (engine or trans) is acting up to cause the act-up.
most folks just add more cooling mods and never correct the problem.
Mario said it and I believe there is validity in that the bus is just
not designed to run in temps over 100 degrees. The bestt mod for hot
day cooling is a sixpack and a book.
Greg ofTim&Greg
94ptca
--- In
WanderlodgeForum@yahoogroups.com, Wilhelmus Schreurs
wrote:
>
> Question regarding the engine fan on 3208 T.
> Has anyone considered going electric on these fans?
> What would the positives or negatives be?
> I was asked this by my mechanic, but I do not think it is the right
way to go. The Horton fan does a wonderful job and (knock on wood) I
have not had any problems with it.
> Thanks
> Â Bill 84 FC 35 SBÂ "$quanderlodge"
> Terrace, B.C. Canada
>
>
>
>
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