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That lever is a Sherman Step-Up tranny! Cool...so...

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Rob

04-18-2002 18:52:10

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I knew that lever stepped-up the PTO speed nicely but I didn't realize it changed the ground speed. She really hauls butt down the lane with that lever pulled back!
Help me understand this tranny please. It's about full throttle and PTO speed right? So at full throttle in Sherman's low-range the PTO is running at the PTO tool-speed around 540?

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Ok! Got it. Great broucher. Thanks all. Rob nm

04-19-2002 08:26:49

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Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Rob, 04-18-2002 18:52:10

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Roland Jackson...Is there an easy way to check / lubercate the Sherman?

04-19-2002 04:43:49

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Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Rob, 04-18-2002 18:52:10

Know any tricks on checking the Sherman...other then splitting the case?

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Dell (WA)

04-19-2002 08:01:53

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Re: Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Roland Jackson...Is there an easy way to check / lubercate the Sherman?, 04-19-2002 04:43:49

Roland..... ....All Shermans were shipped empty from factory. Fill uppon installation. It is kept full from the open tranny input bearing front oil slinger action. Not to worry..... ....Dell

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NO! Barnstormer

04-19-2002 03:52:52

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Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Rob, 04-18-2002 18:52:10

Rob, full throttle on a properly adjusted throttle linkage is too fast for the PTO and unsafe. The 540 rpm output is obtained when the engine is a 1500 rpm, NOT FULL THROTTLE.
These mowers are dangerous enough at proper speed with their ability to sling debris. If it sounds like a jet engine whistle under the mower deck, it is too fast.
I usually run about 2/3 to 3/4 throttle on my brushhog. It is close.

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Ed Gooding (VA)

04-19-2002 02:42:01

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Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Rob, 04-18-2002 18:52:10

Hey Rob. This original ad for it may also shed some light:

Hope this helps..... ..... Ed
'52 8N475798

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PHILIP

04-19-2002 13:32:59

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Re: Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Ed Gooding (VA), 04-19-2002 02:42:01

ED, IS THE OVER/UNDER FOR THE 8N LUBRICATED THE SAME, BY SPLASH, OR IS IT A SELF CONTAINED GEAR BOX? THANKS. PHILIP

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SteveB(wi)

04-19-2002 06:53:08

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Re: Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Ed Gooding (VA), 04-19-2002 02:42:01

Ed, you must have a copy or brochure of just about everything ever made for these Fords. It's just amazing the size of your collection!

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Ed Gooding (VA)

04-19-2002 09:12:35

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Re: Re: Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to SteveB(wi), 04-19-2002 06:53:08

Hey Steve. Shoot, I wish! There's a ton of stuff that I have yet to acquire. I have catalogued about 350 different pieces that I do have in an Access data base so far, and I've still got three stacks of stuff that I haven't had time to even catalog, and let's not even discuss scanning this stuff into digital format. I guess if I ever get snowed in for a week or so I could get some serious scanning done.

Thanks for the nice comment..... Ed
'52 8N475798

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SteveB(wi)

04-19-2002 09:37:12

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Re: Re: Re: Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Ed Gooding (VA), 04-19-2002 09:12:35

What does it take to get snowed in for a week down there, 8" maybe 10"?

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Ed Gooding (VA)

04-19-2002 09:46:29

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Re: Re: Re: Re: Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to SteveB(wi), 04-19-2002 09:37:12

LOL!!! More like just the threat of snow down here!!!

LMAO..... ...Ed
'52 8N475798

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John

04-18-2002 19:58:46

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Re: That lever is a Sherman Step-Up tranny! Cool...so... in reply to Rob, 04-18-2002 18:52:10

Rob, If Memory serves me the sherman steps each gear up by 1.5 times. And it steps it down the same if your tractor has an over/under sherman in it. The pto rotates at 545rpms at1500 rpms on motor. And yes this chages with an overdrive engaged. Acording to the book higher rpms on the pto are only recomended for belt pulley uses.

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