900 Selectospeed problems

Naber · Mar 26, 2020

I've had my 900 selectospeed for at least 10 years and now wish I didn't have it. I have used the tractor a lot over the years. The selectospeed was never perfect but usable. Yesterday it completely stopped and won't move in any direction in any gear. Traction Coupler looks ok. Fluid seems to be full. Don't really know who fixes them around here. Any suggestions?

Dean · Mar 26, 2020

Does the PTO carry a load?

Dean

Dieseltech · Mar 26, 2020

As Dean asked, does the PTO work/pull OK? That checks the flywheel splined coupling/shaft splines. If it does work fine then the input splines are not stripped. I had the same trouble with my 6000 recently after rebuilding the engine this winter. Engine/transmission worked fine, SOS shifted fine with the cover off using a screwdriver, but would not shift with the lever. I found the cable/wheel assembly had broken loose from the heavy center steel washer, wheel would not move with the washer when lever was moved. I decided to drill/pin the wheel to the washer in five places to make sure they moved together, now it shifts fine again. Makes me wonder how many SOS transmissions were parked due to a loose shift wheel/cable assembly?

Naber · Mar 26, 2020

(quoted from post at 13:51:38 03/26/20) Does the PTO carry a load?

Dean

I'm not sure how to check how big of a load the pto will take because I can't move the tractor. It does seem to carry a load because I can't stop it manually. Actually, the pto runs all the time regardless of whether or not I pull the pto handle.

I have a shop manual but am not much of a mechanic when it comes to this.

Naber · Mar 26, 2020

Where do I find this wheel/washer? Do I remove the top lid to find it? I have a repair manual if I know what to look for.

Dean · Mar 26, 2020

Does the PTO operate NOW?

Dean

shaun wallace · Mar 26, 2020

Turn on pto wedge 2x4 between pto and drawbar.

Larry NCKS · Mar 26, 2020

(quoted from post at 07:23:25 03/26/20) I've had my 900 selectospeed

You may have a 901 SOS. For certain you do not have a 900 SOS unless someone has replaced a gear drive transmission with an SOS. They did not make the 900 series with the SOS option.

The guys are asking you to find out whether the PTO will pull a load. Simply turning does not mean anything to us unless it will drive a load.

If it will not drive a load, that tells us your TLC (Torque Limiting Clutch) or your input shaft has failed in some way. This requires a front split and some finess not to drop a thrust washer into the SOS. If you drop the thrust washer, you'll completely disassemble the transmission to replace it.

If the PTO will drive a load, we know your TLC and input are OK and the problem is either internal to the transmission, in the shifter or in the TDC (Traction Disconnect Coupler).

Naber · Mar 26, 2020

Larry, you are correct. It is not a 900. I believe it is a 981, serial no. 62147. It is a gold demonstrator model that someone
repainted. I will have to work a little harder to figure out if the PTO will turn under a load. I will post what I find out.
Thanks!

900 Selectospeed problems

Naber

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Dean

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Dieseltech

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Naber

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Naber

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Dean

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shaun wallace

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Larry NCKS

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Naber

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