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Old 08-04-2019, 04:53 PM   #1
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Dale70's Avatar
American Coach Owners Club
Join Date: Jan 2014
Location: Palm Beach Gardens FL
Posts: 583
2000 Eagle Hydraulic Fan controller

we just left home today to go on vacation in South Carolina.
We were almost at end of day somewhere in GA, and I hear a noise from engine area. stopped and opened engine hatch and front of engine is covered in what turns out to be hydraulic fluid.
Put some fluid in to get to RV park and can now see the fluid seems to be leaking out of side of Hydraulic Fan controller -- cummins ISC 350.

Will talk to local diesel repair person in morning but have my doubts about that.

Maybe if leak is slow enough I can just stop and refill along the way and deal with it in next two weeks in South Carolina.

I did however loose the several gallons in the tank reasonably guickly.

2000 American Eagle -- Cummins ISC -- lift pump type
Anyone know this hydraulic fan controller part ???---
rebuild ??

I can call Fleetwood tomorrow and see what they say also.???
I have read online here a lot about the "wax" fan controller but any pictures in threads do not seem like mine.

Sitting in RV park tonight and will decide action first thing in morning

thx Dale
2007 Tiffin Allegro Bus 40QSP
(2000 Eagle 40EVS - SOLD)
2004 Ford Explorer 4WD -Toad
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Old 08-05-2019, 07:31 PM   #2
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American Coach Owners Club
Join Date: Jan 2014
Location: Palm Beach Gardens FL
Posts: 583
Well to close my own short post -- here is the conclusion

After looking at the priority valve the leak looked like it was coming from the middle of the valve. I took the RV -- after filling with a temporary fluid, to a local mechanic -- he was in one of the worst looking shops I has ever seen.
He climbed under -- cleaned the area and felt it was some king of loose threaded plug. he tightened, but it was still leaking with a bad O ring.
With that replaced the leak was fixed.

Long story abbreviated -- there is a threaded plug that can work loose on the Priority Valve on the Spartan hydraulic system which powers the steering the the radiator fan.

I am glad it was simple given the problems it could have been,which could have been issues since we are traveling on vacation to our favorite lake in South Carolina

thx Dale
2007 Tiffin Allegro Bus 40QSP
(2000 Eagle 40EVS - SOLD)
2004 Ford Explorer 4WD -Toad
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Old 08-10-2019, 04:46 AM   #3
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Workhorse Chassis Owner
Join Date: Sep 2010
Location: Marquette, Michigan "Da UP" & Lehigh Acres Fl
Posts: 21,313
Thank you for the update they are important for those who may do a search of the subject in the future.
John & Cathy R.
06 Pace Arrow 38L Workhorse W24
08 14 Lincoln MKX AWD, 06 Lincoln Mark LT 4X4
See My Pace Arrow Upgrades
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fan, hydraulic

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