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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Turn fan blade over on D4 dozer???

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denjoe

10-17-2003 03:33:05




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I was told by someone that you can turn the fan blade over so as to eliminate dust blowing back when piling brush etc. Anyone have any info on this???? thanks!




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Dave Grubb

10-18-2003 04:03:27




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 Re: Turn fan blade over on D4 dozer??? in reply to denjoe, 10-17-2003 03:33:05  
It is very likely that you do have that--most do--at least in cold climates. Normal operation is to blow out through the radiator--for two reasons: a. You are pushing cleaner air through than if you were pulling air right behind the blade. b. It keeps from blowing the hot dirty air back on the operator and engine. Reversing is normally done in the winter to take advantage of the warm air. Be careful if you are plowing light snow with the fan pulling--you can clog the radiator.

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Bob/Ont

10-17-2003 19:04:45




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 Re: Turn fan blade over on D4 dozer??? in reply to denjoe, 10-17-2003 03:33:05  
Denjoe, If your fan has a special hub with blades that can be rotated you can reverse the blades by pushing them in and turning them, they will spring back out and lock on pins. If you have a fixed fan then you can buy another one that forces the air the other way. Suction fans force air back at you Blower fans force air forward and out through the rad. You can't just pull the fan and turn it over, it will blow the same way but not as well. Later Bob

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JAG

10-17-2003 15:51:17




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 Re: Turn fan blade over on D4 dozer??? in reply to denjoe, 10-17-2003 03:33:05  
Yes you can turn most fans I know of over. I'm not sure what is involved with it. I know a company that in the summer would flip the fans or maybe just the blades over in the summer on there D8's and D9's to help keep the operators cooler. The fan works the same pushing or pulling. Where a fan would not work the same would be to spin it in the oposite direction facing it the same way.



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Deas Plant.

10-18-2003 01:22:53




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 Re: Re: Turn fan blade over on D4 dozer??? in reply to JAG, 10-17-2003 15:51:17  
Hi, JAG. If you don't know what is involved in turning a fan around then you don't know a lot of fans. The ONLY fans that you can satisfactorily turn around are those that are designed to be reversible. These have the blades mounted in a hub with pivots that allow the blades to be turned and the blades themselves have have no curvature. A fixed fan can be reversed but will still be blowing the same way and will not perform as well as when installed the right way around and I would not recommend that anybody do it because of the risk of cooking the engine, especially in hot weather or in dusty conditions where said dust builds up in the radiator. If you don't believe me, get your lunch-hooks on a standard sucker fan off the engine, turn it around and rotate it in the same direction as it turns on the engine and see for yourself. Denjoe, unless that fan is of the reversible type, you are lookin at buying a blower fan for your machine to achieve the desired result. Hope this helps. You have a wonderful day. Best wishes. Deas Plant.

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Jonathan

10-17-2003 21:50:16




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 Re: Re: Turn fan blade over on D4 dozer??? in reply to JAG, 10-17-2003 15:51:17  
.....wow !!!...



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Jonathan

10-17-2003 03:45:44




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 Re: Turn fan blade over on D4 dozer??? in reply to denjoe, 10-17-2003 03:33:05  
A fan is designed to flow air in one certain direction. If you flip it over , the baldes will still be forcing air in the same direction, only not as efficiently due to the curvature of the blade. You can usually buy a blower fan or a suction fan for a particular engine. There are companies that make fans with blades that are reversible...usually a bit pricey...



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