PTO

[atk_man]

What engine speed/PTO gear should I be trying to obtain to run a finishing mower on a B7100?

Has anybody heard of any aftermarket tachs?

 

[looch]

I think most will agree that you set the throttle high enough to get the job done, in your case cutting the grass. On my old B5100, I'd set it just shy of wide open.
Don't know of any aftermarket tachs specifically designed for tractors. I've heard of one type that uses the engine damper (harmonic balancer). You install a small "sender" on the damper and mount a reader to the block. Every time the sender passes the reader you have one revolution. I don't see why you couldn't install one of these on your machine (unless the price is prohibitive).

 

[atk_man]

Which gear? (I haven't tried yet, I'm just looking for a few pointers before I begin.)

Thanks.

 

[looch]

I seem to remember from another post that your machine is a '79. If this is the case, it probably has the same (or comparible) tranny as the '81 B5100. I would run mine in third gear, low for the thick stuff and first gear, high for weekly cutting. 2nd gear, high with the throttle wide open was just too fast for lawn travel even when I wasn't mowing.

 

[atk_man]

Thanks.

Can I safely run the throttle wide open? What should the rpm be when the throttle is rammed right to the stop?

One more thing, 1, 2 or 3 on the PTO?

 

[mbjacobs]

Read a message on Yahoo KOG from a guy that installed a tach on a B7100, doesn't sound easy.

http://messages.clubs.yahoo.com/clu...d=kubotaownersgroupkog&sid=1600062557&mid=226

Maury Jacobs

 

[Thomas]

When useing B7100HST w/the rear mower I go by feel.
Depending on the surface and what I'm cutting thats when I section the comfortable tractor speed and rpm's
About 2/3 throttle -+/

Thomas..NH /w3tcompact/icons/wink.gif

 

[looch]

<font color=blue>Can I safely run the throttle wide open</font color=blue>

Safe for the tractor, but I'd wear hearing protection/w3tcompact/icons/wink.gif.

I'd be guessing the RPM at full throttle - probably somewhere around 2600?

<font color=blue>1, 2 or 3 on the PTO</font color=blue>

Sorry, can't help you there. Mine was a MMM running off the front, electric clutch PTO - one speed fits all. Most (all?) 3ph mowers like 540 RPM at the input.

 

[Bird]

Atk man, the "standard" recommendation from dealers seems to be to open the throttle wide open, then ease off just enough to notice the change in sound; that'll be "PTO" speed which is only a couple hundred rpm below wide open. However, the tractor has a governor and it won't hurt it to run it wide open. As for which gear; whichever one gets the job done the way you want it without lugging the engine.

 

[RobertN]

On these tractors, isn't there a governer that will limit the rpm? I have never looked on my B8200, just always assumed there was. I have never had need to really crank her up.

RobertN in Shingle Springs Calif