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Ford Tractors Discussion Forum
Show Parts for Model:

Bush hog RPM???

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Mike Hodgins

08-23-2009 11:26:35
74.67.164.157



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Can anyone tell me what is a good rpm to mow at? I'm just curious because I have a working proofmeter for the first time in many years.

I have always done normal easy mowing in third gear.

It's a Ford 850 5 speed.

Thanks




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Oldmax

08-24-2009 18:33:17
24.154.154.82



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
The correct PTO speed is on the Tach. use it the engine will work more better and use less fuel if it ts run in torq range. You are doing damage to the engine by not running at the correct RPM or lugging engine. This holds true in gas engines & Diesels will run hot if you do not run at correct RPM. They are made to run at that RPM govenor will protact them .



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268dave

08-24-2009 13:10:35
205.188.117.74



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
I noticed after I started to run mine at 540 rpm the cut was much better and the engine did not lug and stumble as much.

If I run into some very light low grass, such as the horse paddock where there is only a smatering of weeds, I knock down the rpm slightly and when I go into the regular height grass raise the rpm back to 540 rpm



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dpendzic

08-24-2009 12:44:15
24.45.227.85



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
on my 1310 2450 rpm gives 540 rpm on the pto



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RodInNS

08-24-2009 05:53:28
216.118.158.123



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
540 or whatever slower speed it will cut cleanly at. There's no need to run it fast if running it slower will do. Running slower will save gas.

Rod



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John77046

08-23-2009 19:07:37
216.249.206.60



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
There should be a line on your tach at 540. Start at 540 and then listen as you go along. Sometimes a tractor and implement will "do better" slightly faster and sometimes slightly slower than the 540 as marked on the tach. Regardless, start at 540 on the tach and then listen and make slight adjustment from there.



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sotxbill

08-23-2009 18:18:45
70.234.205.17



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
most pto driven implements are met to run at the advirtised pto rpm... and a rotary cutter is one of those. you need to run the pto at 540 rpm for the blades to spin at the correct rpm to cut the grass and clean the blades and cutter so that it can cut more grass.. hay balers, rotary tillers etc are all made to run at 540....so you should keep the rpms at that setting and pick a gear to adjust the ground speed, not use the throttle for ground speed.

the only exception is the post hole digger..
most post hole diggers will dig just fine a slightly above an idle... and then if you snag a root, the tractor engine will stall.. this is correct and will save you and your digger. the post hole digger will not dig faster at higher speeds but will usually just heat up the blade tips and dull them faster. so a post hole digger is about the only thing you run at a slower speed than 540 rpms...

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Brian Bell

08-23-2009 13:37:12
72.148.96.229



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 Re: Bush hog RPM??? in reply to Mike Hodgins, 08-23-2009 11:26:35  
The proofmeter should have PTO speed or 536 marked on it. It is usually marked on the inside of the speed marking ring. I would guess in the 1500 to 1800 rpm range.



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Burban2002

08-23-2009 15:38:43
24.210.24.46



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 Re: Bush hog RPM??? in reply to Brian Bell, 08-23-2009 13:37:12  
On my proofmeter the 540 pto is at about 1750 rpm.



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