Parking pawl/Collar shift transmissions

rdam · Sep 10, 2003

I don't know. That's what I'm trying to find out.
If it's an "automobile" type park position, then the weight of the tractor and implements would be "on the transmission" if you were parked on any type of hill or incline. That can't be good. I wonder if these tractors also have a parking brake?

cowboydoc · Sep 10, 2003

No they don't have a parking brake.

joecdeere · Sep 10, 2003

Yes these tractors have a parking pawl, much like a car if they have the "standard TSS or CST" tranny. In the last five years I have only seen two or three with problems. One had parked on a hill with a extreme amount of weight in a trailer and then couldn't shift out of park, so he forced it until the shifter failed. The other slammed it into park while still moving. I even did a DTAC search for problems and while there have been a few problems reported, I don't think they are as bad as your dealer is making them out to be. Maybe he has some other tractors he needs to sell before he has to pay on them? Instead of ordering you a new one?

rdam · Sep 11, 2003

The dealer didn't offer an alternative so I don't know about him not wanting to order in a new one. Apparently it WAS some type of problem and apparently they are addressing it What exactly is a DTAC search? And how it that you came across two with pawl problems. Not much info in your bio

joecdeere · Sep 11, 2003

DTAC is dealer technical assistance, where dealers can search deere for help with problems and solutions.
I work for a Deere Golf & Turf Dealer.

zuiko · Sep 12, 2003

So these tractors have a park setting like on a car with an automatic transmission? Why would you want that on a tractor?

cowboydoc · Sep 12, 2003

It's used so you don't have to use a parking brake. It essentially locks the wheels on the tractor. If you've been around farming and the older tractors you know they are very prone to running away on their own and pretty dangerous. The parking brakes don't always work the best even on brand new tractors. With the park function on the tractors unless the whole tractor slides you are safe.

timb · Sep 12, 2003

Are we talking about running or shut down tractors?

Whatever happened to parking a gear vehicle in gear? (engine stopped of course)

I've always done that although I consider the design of some (most? all?) tractors that have wet clutches where hydraulic pressure is used to engage the clutch instead of springs to engage and hydraulic assist to release an unfortunate design if it prevents using the tranny to help out. Sure the brakes should be set but I figure doesn't hurt to have a little redundency.

Tim

cowboydoc · Sep 12, 2003

Running or shut down tractors. Putting a tractor in gear will not stop it most of the time. Even in first gear. It's not like a tranny in a vehicle.

yellowsocks93 · Sep 12, 2003

Yeah the older combines like some tractors have bad parking brakes and I usually have to use a piece of wood at work to stop them from rolling all over the place. I usually put my 990 or the 70 in gear and it stops it fine on a hill just as you would a car. I don't get why its not like a car. For the large ag tractors they have a park in the range shift so you don't have to worry about the parking brake going out just like the 5000 series.