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I know all you guys are probably not interested in what a lady has to say about these different PTOs in tractors, but my dealer tells me there are (today) three different PTO systems used in tractors. One, the most basic, is the constant transmission-driven PTO. John Deere has two tractors in production that use this system, the 790 2WD without power steering and the 4100 gear. Neither of these tractors have the 2-stage clutch or over-running clutches, thus the implement can actually push the tractor along. This is the least expensive unit to build. (JD uses this system because all of the tractors competing with them in this class use that type PTO). The second, an upgrade, is the continuous live PTO with 2-stage clutch and over-running clutch. This one also requires using the clutch pedal to engage and disengage, but doesn't push the tractor along when the clutch pedal is fully depressed. (This is the one used on JD's 790 2WD with power steering, 790 4wd, and 990 2wd or 4wd, as well as a number of other brands). The top of the line is the independent live PTO. This one works totally independent of the transmission, and nothing we do with the clutch pedal has any affect on it (those of us with JD HSTs don't worry about that though, 'cause we don't have clutch pedals). The independent live PTO is turning when the handle engages it, and stops when the handle disengages it. It won't push the tractor, because it it not dependent on the transmission for its drive source. Now... I have no idea what I just said, it's just what Tom wrote down and emailed to me so I could go in here and look like I was intelligent.

JD 4400 PTO Problem
John Deere Tractors
Replies 13 Post by Renee

Alan: We bought a John Deere 4200 tractor with a 72" mid-mount mower and a 420 loader. We looked at several brands before purchasing, and the Deere salesman was the only one who was excited about demonstrating the ease of removal of the loader and mid-mount deck. (Tom Bowen, Ag-Power, Terrell, Texas). The loader can be removed from the tractor is about 1 1/2 minutes (add another 2 minutes to disconnect the quick-release hoses, put the protective caps in place, and remount the tractor). I don't have to put park stands in place or use any tools to do this. I am 23 years old, stand 5'6" tall and weigh about 115 pounds, and can remove the mower deck by myself. It is a simple procedure of turning the wheels on the deck 90 degrees, let it down to the ground, disconnect the driveshaft (twist & pull), pull a couple of spring-loaded pins and turn them, then roll the deck out from under the tractor. If you go with the mm deck, you will need to stick with either turf tires or at best, the R4 industrial tires, as, according to the salesman, the regular tractor tires will interfere with the mid-mount deck operations. If you are in wet sticky soil, you may want to consider regular tractor tires and a rear-mount mower deck (this was what was recommended to us). Also, buy the HST! We love ours!

Installation Removal Ease
John Deere Tractors
Replies 2 Post by Renee

It is not unusual for the backhoe to drop over a period of time. The 4000-series tractors have an open-center hydraulic system that is not designed to hold a load in the up position for long periods of time with the engine not running. If you leave your loader in the up position, you will notice that it also drops over a period of time. (This according to the Tom Bowen at Ag-Power, Terrell, Texas, the salesman who sold us our tractor). We don't have a backhoe, but he said the result would be the same with a rotary cutter or any other implement of significant weight. The drop will be less noticeable on lighter implements, such as a box blade.

Hydraulic Stop Valve
John Deere Tractors
Replies 16 Post by Renee

The bar tires on the rear of your tractor are not compatible with a mid-mount mower. The turf tires will work fine on the front and/or rear. R4 industrial tires will work well on the front, but clearance on the back with a 72" mid-mount mower will be minimal at best with the deck in the raised position. (I got this information from Tom Bowen, the salesman at Ag-Power in Terrell, Texas. He sold us our 4200.)

tire problems on JD4200 w 420fel 72mow 413mow
John Deere Tractors
Replies 4 Post by Renee

The mid pto speed on the John Deere 650 is 2,000 RPMs. If you move a mid-mount mower deck to the rear, it will not turn fast enough to cut grass.

Mid PTO speed
John Deere Tractors
Replies 4 Post by Renee