Because they could?
Seriously, most of the pushers I've seen have side mounted radiators that
would receive virtually no natural airflow at speed. Diesels need a bunch
of cooling so the engineer probably decided on a solution that would
guarantee robust airflow through the radiator at all times. Automotive
fans, on grand scale of fans, don't move a whole lot of air.
Are the hydraulics used for anything in the vehicle? Perhaps it was an
idea to take advantage of a system that would be otherwise be idled for
long periods.
Who manufactured your motor home?
Jon
"Mordy Dunst/Gasket Works USA, LLC" wrote:
>
> Question:
>
> I have a motor home with an 8.3 l cummins diesel pusher. the coolant
> radiator is on the rear and side of the coach. This radiator is probably 48
> inches wide and possibly 30" tall. It is cooled by two fans powered by
> hydraulic motors. The system seems very complex. It has dual hydraulic oil
> filters lots of high presure hoses and a special gilmer cog belt drive for a
> large hydraulic pump driven off the crankshaft. this belt is very expensive
> (about $300.00) and is not an automotive belt, but instead is an
> industrial belt not at all easy to get. It took some doing to find a spare.
>
> The point is ... Why did the engineers do this? why not two or four
> electric fans thermostatically controlled?
>
> I'm tempted to take this maze of hydraulic pumps, filter, motors, hoses and
> accumulator tanks and toss them.... and replace by two or four electric
> fans....
>
> comments that would shed some light on this would be appreciated.
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