Allis Chalmers WD governor spring upgrade questions

tractortrav · Apr 11, 2015

Well I just bout my first tractors a pair of WD's, I've heard of guys putting a WD45 governor spring in to give it a little more ommf. I's this the best solution or what else can I do to give it a little more power? Thanks Travis

NEKS · Apr 11, 2015

I guess if you just bought them, why do you think you think they need more power.

Kip-Utah · Apr 11, 2015

Stock WC is governed at 1300 rpm, Both WD & WD45 are governed at 1400 rpm...so a WD45 spring will speed up a WC but do nothing for a WD. A D17 spring will speed a WC up to about 2050 rpm. I'm not sure what this does for a WD. Kip

tractortrav · Apr 11, 2015

Basically I do not have enough rpm to run a mower I got for it... I think. It's a 540 rpm mower and I don't think my PTO is spinning fast enough to
run the blades fast enough. That and I plan on doing a little dirt work around my farm. I don't know much about tractors I didn't have anyone to
teach me growing up, most of the things that I know mechanically are self taught. I've been tinkering with the carb to try to make some adjustments
from things I read online and so far that's going well (or so I think haha) Thanks for your in put -Travis

RalphWD45 · Apr 12, 2015

I picked up a hand held tach at HF last year, when I was working on what size pulley, to put on my air compressor. With my tach, you would stick a small piece of reflective tape, on your pto shaft, point the tach at it, and read the RPM's. With that tach you will know if you need to mess, with the govener, or not!

Bob Bancroft · Apr 12, 2015

If your AC engine is not running fast enough to get you 540 PTO RPM's loaded, it's a rare one. Typically you have to throttle back a little to maintain 540.

AC governors are very snappy/responsive, but not very precise, as compared to, say a diesel injector pump governor. I put a "Tiny-Tach" on my WD45 so I could maintain 540 on a bush hog. Which is kind of ridiculous since in my youth, we were running mowers, hay crushers, balers, combines, and corn pickers with WD45's by guess and by gosh.

As mentioned, you can increase speed with a governor spring from a later model of the same basic engine. But that's not giving you any more power. If your engine is not responsive, there are several other possible issues. You really don't want to be over speeding a 540 RPM PTO implement. Operator's manual will give you all the speeds- engine wide open- engine speed @ 540 PTO RPM- belt pulley- idle- etc.

tractortrav · Apr 13, 2015

Well just a little update.... I started digin in to finding out what was going on and found one of the spark plug wires was shorting out on the block through the boot and the head gasket is blown... sooooo here goes alot of work! thanks for all your input!

Butch(OH) · Apr 15, 2015

Yup, most of them will run way past 540 and that's why most of the throttle quadrants have notched filed in them for a quick PTO speed reference.

DrAllis · Apr 15, 2015

Top PTO speed is like 665 RPM with the engine at 1700 RPM on all WD and WD-45 gassers.

tractortrav · May 19, 2015

After some tinkering around I found out that one of the spark plug wires were shoring out on the head did a full tune up and the thing runs great! thanks for all your input!!

Allis Chalmers WD governor spring upgrade questions

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