9 speed transmission?

I have read a few articles about the Heisler?
(spelling) 9 speed transmission and I am curious.I
have never seen one but how is it set up, and what
is the procedure for converting an M? No, I'm not
going to convert mine. Was it a dealer option or
an after market thing? How is it done? Thanks, Ellis

Both versions were aftermarket. Heisler made one that was lever operated and M&W made one that was cable operated.

See this thread where DSlater posted pics of the Heisler in an h to correct me on where the gears actually mounted.

http://forums.yesterdaystractors.com/viewtopic.php?t=1191252&postdays=0&postorder=asc&start=15

Heisler (also M&W and I believe Schwartz) offered a 9 speed kits. The 9 speed was NOT a factory option.

It works by adding a 2nd set of countershaft drive gears inside the transmission. When engaged it increases the RPMs of the countershaft by 40%(?). This in turn increases ground speed in gears 1 thru 4 by the same percentage. It also increases PTO shaft RPM by the same amount.

9 speed kits do not affect 5th gear speed since 5th is "direct" (countershaft is not used).

Excellent explanation Bob but to make 1st gear (2.6 mph stock) faster than 5th gear (5.1 mph stock) then the increase on speed for the PTO and belly hydraulic pump is way more than 40%. In essence it is over doubled and the increase is more like 120% to 130%.

Short of of having the optional hydraulic pump disconnect then I would never operate the tractor much over half throttle when in the high range.

Would only use low range direct drive for anytime the PTO would be engaged too.

I have two 9 speeds. Both M+W, one cable, one lever operated. Both are in M Farmalls. I have put countless hours on the 9 speed with no problems. It will make the hydraulic pump ( sing) when wound up, but never have seen a problem. After using one you will wonder how you ever used the tractor without. Sure makes the M a much handier unit,

(quoted from post at 20:09:06 02/20/15) Both versions were aftermarket. Heisler made one that was lever operated and M&W made one that was cable operated.

Click to expand...

M&W made them both lever-operated and cable-operated.

AG

I have both a H and M with the Heisler 9 speeds and find that generally they are always used in the high range as the speeds produced are more in line with what those tractors are used for today. I remember as a kid back in the late 1940's my uncle who farmed corn in Iowa had to haul loaded wagons from the fields to his storage facilities and traveled on a county road in Hi 4th at around 12 mph with enough torque to pull some slight hills with full wagons where the M in 5th couldn't. The Heisler components had the appearance that looks like they had been produced in an IH factory but weren't and blend in nicely with the rest of the tractor, Hal.

Are these articles about Heisler trannies on the internet somewhere. I have a Farmall M with a Heisler too and am curious to know more about them and if it adds any value to the tractor.

Both types used the same design with different type parts. Extra gear was added to the transmission input shaft to drive two constant mesh gears on the counter or lower shaft. Shifting parts were installed to lock the two constant mesh gears to the lower shaft. when shifted one constant mesh gear was locked to the counter shaft and the other one not locked was just free spinning. Since the two constant mesh gears were a different ratio the counter shaft speed was changed depending on the gear locked to shaft.
Since line of power through the transmission for all gears but 5th is input shaft to counter shaft, then gears on the counter shaft driving the top shaft, with top shaft exiting the transmission compartment. Changing the counter shaft speed will give 2 different speed selections for 1 through 4 and reverse. Although 1 in high range was faster than 4th low range with faster speeds on up. Some kits for super models were a exception to the 1 high faster than 4 low though.
M&W in low range or the standard M speed the input shaft or engine turned 2.7 times to get one turn of the counter shaft. High range the input shaft turned 1.17 to 1 countershaft turn.
Failed to write down the Hiesler teeth count in the past. So don't know if they are the same ratio on the high side.
Have two M with M&W lever type and a H cable shift type.

Ellis, I have never found or seen them anywhere on the internet but that doesn't mean they aren't. There use to be a person in Iowa I believe and most likely a Heisler family member that sold copies of the installation and use instructions and maybe they also included a parts list on eBay and/or the classifieds on this site. That was 10 years or so ago but I haven't seen them offered recently. I wish I had picked up that package when they were offered and available but never did, Hal.