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Old 04-12-2011, 06:23 PM   #1
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Wondering about engine fan

I have a 2002 Newmar Dutch Star 35' on a Frieghtliner chassis. Does the engine fan run all the time or does it cycle. It has a side radiator.
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Old 04-12-2011, 07:27 PM   #2
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Hi rvjimmy,
I can not say for sure, but when you first start the engine, listen/look to see if the fan is running. In addition, if you can see the shaft that runs the fan, you'll be able to see a fan clutch, if there is one.
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Old 04-12-2011, 08:57 PM   #3
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My Monaco runs the fans when it needs to. They may spin very slowly until temperature gets warm, then they speed up.
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Old 04-13-2011, 08:04 AM   #4
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Most of the side radiator models were hyd. operated. Look at the fan hub. If it has a large hose running to and from the hub, it is hyd. The hyd. driven fans were thermostatic contrlled. They opened up and allowed the fluid to spin the fan when hot. Then closed when cool.
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Old 04-13-2011, 08:31 AM   #5
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Easy answer -- call Freightliner at 800-FTL-HELP begin_of_the_skype_highlighting 800-FTL-HELP end_of_the_skype_highlighting, and have the last 6 characters of your VIN handy. They can tell you anything you want to know about your chassis.
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Old 04-13-2011, 06:57 PM   #6
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Update; Had DW start RV while I watched fan, at idle fan ran slow at hi idle it runs faster. The engine was cold and I think that the fan should not be running at all. If I don't find any info here I quess I'll have to breakdown and call Frieghtliner.
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Old 04-13-2011, 07:18 PM   #7
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Quote:
Originally Posted by rvjimmy View Post
Update; Had DW start RV while I watched fan, at idle fan ran slow at hi idle it runs faster. The engine was cold and I think that the fan should not be running at all. If I don't find any info here I quess I'll have to breakdown and call Frieghtliner.

Calling Freightliner can save you a lot of time. After all they are open 24/7, so what do you have to lose?
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Old 04-13-2011, 08:48 PM   #8
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Not 100 % sure but if the fan is a hydrolytic running off power steer pump will run at one speed unless the is clutch attach to the fan.
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Old 04-14-2011, 02:56 PM   #9
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My '01 DSDP F/L Cat combo had the multi speed fan. Fan will rotate slowly when cool. When warm/hot it will turn much faster.

Newmar should be able to tell you also.

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