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Bushhoggin with sherman

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Redbelly1

07-24-2000 04:36:51

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this past weekend i did some bushhoggin with my 52 8N on a hillside field with some very heavy grass, briars, muscadine vines, etc. you get the picture. anyway, i was VERY thankful for my sherman trans. i still had to take my time, but was able to do a good clean job. ( until i bought my N , i had'nt used a tractor for about 27 years, so i'm having to learn all over again). but to my question. i was told by a local new-holland guy that they dont sell parts for the sherman trans. havent had them for years. .....is there a place that has or can get parts? thanks in advance.

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Saloneye

07-24-2000 10:17:33

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Re: Bushhoggin with sherman in reply to Redbelly1, 07-24-2000 04:36:51

I am interested in how the Sherman helped with hoggin'? It was my understanding that the Step-Down Sherman lowered the PTO shaft speed by the same ratio that it slowed the tranny and that this was not recommended for PTO use.

Paul II, In Vermont

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Nolan

07-24-2000 11:38:06

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Re: Re: Bushhoggin with sherman in reply to Saloneye, 07-24-2000 10:17:33

Right church, wrong pew.

Yes, the Sherman alters the input shaft rpm, so you don't get free lower ground speed as it were. But then, the Sherman never was about that. It was about getting more power at the same speed.

In direct drive (non-sherman as well), the engine turns 1500 rpm or so for the 560 pto rpm. Well and good.

The Sherman in underdrive requires the engine to be turning at 2100 rpm (or there abouts) for the 560 pto rpm. This means....more power! About 20% more.

So, if you've had problems with your hog bogging down in grass, you'll have more power to keep it spinning with a Sherman in underdrive.

The overdrive mode has the engine spining at something like 900 rpm for a pto rpm of 560. Absolutely no power in this case, but you're also not burning any gas. So if all you're doing is some light trimming, you can do it while idling.

In a nutshell, the Sherman does just fine for bush hogging. It's just greatly misunderstood in what it actually does.

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BrentD

07-25-2000 09:32:15

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Re: Re: Re: Bushhoggin with sherman in reply to Nolan, 07-24-2000 11:38:06

Nolan, I have a high-only Sherman. To avoid hogging in second gear per Zane's comments on the achille's heel qualities of the #2 gear, I will often move to first gear in the high range when I'd normally be in my normal second gear. It works for me anyway.

Brent

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Nolan

07-25-2000 11:19:22

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Re: Re: Re: Re: Bushhoggin with sherman in reply to BrentD, 07-25-2000 09:32:15

Just understand that if you don't slow the engine down, you're over-spinning the heck out of the hog. While this does make it cut better, it also makes it more inclined to fling the blades off.

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BrentD

07-25-2000 11:27:31

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Re: Re: Re: Re: Re: Bushhoggin with sherman in reply to Nolan, 07-25-2000 11:19:22

It's a very heavy duty rig, but I don't run it all that fast in 1 high. Blade speed is probably just about exactly what it would be in 2 normal from the look and sound of it. I don't run flat out in 1 high - probably closer to 2/3- 3/4 on the throttle plate. I have no proofmeter (it's a '48).

Brent

PS. Any secret advice for getting those blade nuts off? I'd like to grind them or replace them, but they are on there but good, and I don't have significant amounts of heat that I can apply.

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Nolan

07-26-2000 03:47:27

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Re: Re: Re: Re: Re: Re: Bushhoggin with sherman in reply to BrentD, 07-25-2000 11:27:31

No special blade nut advice, sorry. If you've got a side angle grinder to cut them off with, that's probably the easiest. Otherwise, six point sockets, a long extention, and a big hammer.

A propane torch doesn't put out the heat of a oxy-acetylene rig, but set the propane torch into position with bricks and such, let it go for 20 minutes, and you've got a chance of getting things pretty warm. I've been sucessfull doing this on transmission bearings and such in the past.

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Redbelly1

07-25-2000 04:32:49

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Re: Re: Re: Bushhoggin with sherman in reply to Nolan, 07-24-2000 11:38:06

nolan, thanks for the info on how the sherman works. i didnt know all that, all i knew was that it sure did help. any ideas on where parts could be found for the sherman?

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Nolan

07-25-2000 06:15:20

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Re: Re: Re: Re: Bushhoggin with sherman in reply to Redbelly1, 07-25-2000 04:32:49

Ocassionaly I see advertisements on the classifieds of this web site for parts, but other then that, I don't know of anyone selling bolt in pieces. However, there's nothing much to a Sherman, so a decent machine shop could repair or remake any component on one that broke or wore out. If you want service or owners literature, the N-newsletter has that stuff.

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Salmoneye-Thanks_Nolan!

07-24-2000 12:04:59

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Re: Re: Re: Bushhoggin with sherman in reply to Nolan, 07-24-2000 11:38:06

Thanks Nolan!

It has never been put to me that way!

Paul II, In Vermont

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tlak

07-24-2000 11:53:46

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Re: Re: Re: Bushhoggin with sherman in reply to Nolan, 07-24-2000 11:38:06

Will the sherman shift on the go or do you have to stop?

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Nolan

07-24-2000 12:05:48

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Re: Re: Re: Re: Bushhoggin with sherman in reply to tlak, 07-24-2000 11:53:46

You've got to stop to shift it.

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tlak

07-24-2000 11:21:47

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Re: Re: Bushhoggin with sherman in reply to Saloneye, 07-24-2000 10:17:33

When I bushog my tractor engine speed is just above an idle. So my bushhog is not working at 540 rpm. I get a good clean cut and can cut most anything. I'll leave it to the experts on the theories of if its bad for the hog or tractor and why it cant work. I would mow my yard if it would cut closer and not get those edge gougings.

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