Horton Fan Clutch

[Gregory OConnor]

Bob, I have a air clutch on a Cummins N14 truck that cycles on like
you describe. The N14 only does 2000 rpm and I dont like the stress
on the belts when the fan clutches up. I think this fan clutch
stress contributes to all the FC belt problems and horton failures
because the cat does 2800 rpm and it clutches up reguardless of the
engine speed at the time that temp call for a fan. I can only
imagine that the belt and components get a major hit.

I installed a switch on my N14 to turn the fan on at slower RPM and
cycle it less

GregoryO'Connor
94ptRomolandCa


eForum@yahoogroups.com, Bob Criss wrote:
>
> Hi Don
> I just rebuilt my Horton clutch and had it reinstalled. I read
that you are trying to set up a system that tells you when the fan
is engaged. I just returned from Flordia and I can hear the fan
enguaging and dis-engaging while driving. I decided to measure the
time when it was engaged vrs the time dis-engaged. Found that the
fan only spent about one mile not running and about a half mile
running to cool the engine. Seems like to much cycleing to me so I
borrowed a gauge that measures air preccure in inches of water. By
placing a plastic line behind the radiator I found that there is NO
air moving out the back (thru the rad) at speed!! Then I moved the
gauge to the side and again found no air movement until the fan came
on! I am now working on some kind of scoop for the sides or bottom
to force air through the rad without running the fan as it takes
around 15 horsepower I am told.
> Any thoughts on how much/often your fan cycles?
> Does your SP36 have horizontal pans on both sides on the bottom
of the battery area and the air filter on the curb side? Mine is
open on the curb side.
> This is a puzzle I am fighting since I just put a rebuilt CAT
engine in along with a new radiaor and now it doesnt seem to cool as
well as the old stuff??
> Bob Criss
> Bethel Park, PA
> 90SP36
>
>
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