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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #11  
Old 09-13-2018
markusfmeyer markusfmeyer is offline
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Have you tried turning on the fan override switch on the dash?
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Markus Meyer
Phoenixville, PA
1986 PT40 6V92
VB 1570
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  #12  
Old 09-13-2018
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ttbuster ttbuster is offline
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Default Fan override

Yes the fan is not running at this point, just had sensor replaced and it was working great before I left the shop, now nothing. Will have to wait for her to cool down and take her back to the shop.
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Tom Stephens
Bremerton, Wa
86 Wanderlodge 40 PT
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  #13  
Old 09-13-2018
DW SD DW SD is offline
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Sounds like if it doesn't run as fast as it should, there is a problem with the fan drive or PTO oil pump. Lots here have rebuilt the pumps (or both, actually).

I'd wire in the proper alarmstat location too as already suggested.

Good luck!
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2004 M380
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  #14  
Old 09-13-2018
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sfedeli sfedeli is offline
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Disconnect the sensor/thermostat and let the fan run all the time. Also, is the hydraulic fan sump full of fluid? It takes 10W30 if its low.

How the heck did you get a sensor that fast??? Usually they have to be ordered and overnight shipped. What makes our coach system unusual is that the sensor OPENS when it gets hot. Most of them CLOSE when the get hot.
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  #15  
Old 09-13-2018
markusfmeyer markusfmeyer is offline
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Quote:
Originally Posted by ttbuster View Post
Yes the fan is not running at this point, just had sensor replaced and it was working great before I left the shop, now nothing. Will have to wait for her to cool down and take her back to the shop.
Not running at all? Or just slow? As Shane said, with wires disconnected, should run. If it was before and isn't now, wonder what the shop did. Your first post seemed to indicate with wires disconnected it ran but not on high?
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Markus Meyer
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1986 PT40 6V92
VB 1570
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  #16  
Old 09-13-2018
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Not sure now if they put in the right sensor they got it from Pete. With wire off does it run full speed. They put the sensor right next to the other two and pluged the coolant line. They also think it might be the thermostat but I do not know where that is.
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86 Wanderlodge 40 PT
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  #17  
Old 09-13-2018
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After is open center in Arcadia I then move up to Hazlehurst, Ga and would like to see if there is anyone in that area that works on Birds still.
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  #18  
Old 09-13-2018
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Well, with the limited information that I have, I would guess that they put a "typical" close-on-rise thermostat switch in there. You said it was running when you left and then quit running. That leads me to believe that once the engine got warm, the fan shut off. Just disconnect the wires and your engine should run VERY cool the rest of the trip. Try and keep your speed around 65... don't hammer it! The oil in that fan sump will be getting very hot if you run wide open.
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Shane Fedeli
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  #19  
Old 09-13-2018
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Quote:
Originally Posted by markusfmeyer View Post
Not running at all? Or just slow? As Shane said, with wires disconnected, should run. If it was before and isn't now, wonder what the shop did. Your first post seemed to indicate with wires disconnected it ran but not on high?
It runs slow with the temp almost maxed out
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  #20  
Old 09-13-2018
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Quote:
Originally Posted by ttbuster View Post
After is open center in Arcadia I then move up to Hazlehurst, Ga and would like to see if there is anyone in that area that works on Birds still.
You'll be pretty close to George Morris, a retired BB tech from the factory. He has his own shop now and can get your coach straightened out. A slow-running fan could be caused by dirty filters, a worn out fan motor (is it dripping oil from the shaft) or a worn-out hydraulic pump (is the coach hard to steer?) The fan and power steering are both powered by the same gear pump on the engine. If your steering is hard, then the pump could be failing, resulting in low pressure at the engine fan too.
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