Ford 3000 Select-o-Speed PTO operation

Grim · Jun 6, 2018

Hi, I have a 1970 Ford 3000 with Select-O-Speed Transmission. I have recently purchased a PTO driven Woodland Mills Chipper which is connected to the 3 point linkage and the PTO. Obviously the tractor is stopped but running at high revs when using the chipper. The Ford has no trouble lifting or running the chipper. My question is should the Select-O-Speed be in Neutral or Park when using the chipper? I have been selecting "Park" but I notice the gearbox housing gets quite hot. From the service manual I notice that the internals of the gearbox are set totally differently from Park than they are in Neutral.
Anybody qualified to assist me here?
The tractor is a little beauty and never lets me down so I would hate to be doing it any damage. (the tractor and I live in Australia). (Thanks in advance)

Texasmark1 · Jun 6, 2018

I had a 1964 4000 with that tranny. Didn't seem to matter to me which gear. But I didn't do what you are doing.

What you have is friction (gear to gear power losses transferring power primarily) in the process of doing the work which generates heat. There is no place for the heat to be dissipated other than in the oil which is transferred to the steel housing and radiated into the air from that housing that doesn't even have cooling fins. The tractor doesn't have a separate oil cooler located up front of the radiator like larger or some newer tractors to get the heat out and maintain cooler oil temps.

Steel is a very poor thermal conductor like alum or copper (think cooking utensils ...alum pots, copper clad bottoms type thing). The heat is generated at your rpm rate but not expelled as fast as it's generated.....result oil-housing gets warm. No biggie. If you can hold your hand on it for 10-15 sec, you are below 70C which is well below the temp where the oil starts to break down.

Best answer I can give you.

Ultradog MN · Jun 6, 2018

I would ask this on the Ford board.
Those guys ought to know and if not it would make for an interesting discussion.
I do know that same basic SOS transmission was used in the 2000, 3000 and 4000 models of that era. The 2/3000s did not have a transmission oil cooler (or maybe it was optional) but the 4000s did have an oil cooler as standard equipment.
nnalert the Ford Board

Texasmark1 · Jun 6, 2018

I based my response on my earlier model Fords. On my '79 4600, which was Belgian built (I guess, obviously made for the Eurppean market) not SOS (if that made any difference in a cooler or not) I don't recall a cooling coil preceding the radiator.

showcrop · Jun 6, 2018

I rake and bale hay with my 1959 971. The transmission gets hot enough that though it doesn't burn, it really hurts if my leg gets pressed against it.

Ultradog MN · Jun 6, 2018

The Select O Speeds ended in 75 and the X600s began in 76 as I'm sure you know.
I do know the US made 36/4600s did have an oil cooler on them. Not sure about the 2600s as I don't think they had flow control which is where the oil cooler lines originated.
The X600s just had an inexpensive cooler in front of of the radiator.
The SOS models with oil cooler used a wet type oil cooler. The lines went into the bottom of the radiator.

Bret4207 · Jun 6, 2018

What does the operators manual say to do?

Traditional Farmer · Jun 6, 2018

If you want a definitive expert answer about the Ford SOS transmissions give Leroy Printz at Page Implement in Luray Virginia a call 540-743-5233.

Dean · Jun 6, 2018

Gear selection, N or P, makes no difference.

IIRC, a transmission cooler was optional on the 3000. Not sure about European models.

S-O-S transmissions without oil coolers run hot.

Dean

showcrop · Jun 6, 2018

(quoted from post at 05:25:50 06/06/18) If you want a definitive expert answer about the Ford SOS transmissions give Leroy Printz at Page Implement in Luray Virginia a call 540-743-5233.

I stop in to see him every 2-3 years.

Texasmark1 · Jun 6, 2018

I see your point. I was generic Ford replying and the cooler had to do with the SOS keeping the fluid cool....er. Thanks.

Grim · Jun 6, 2018

Hi and thanks to all those that gave advice on this message.
I have posted it on the ford forum as suggested.
Thanks TraditionalFarmer with Leroy's details. I am in California next week for a wedding & I'll give him a call.

Just on this subject, I checked the repair manual and for some reason the bands on the planetary gears are positioned differently when in N from P. The engine also sounds as if it is working a little when P is selected but not when N is selected. I can understand the gearbox getting hot when the tractor is working the wheels, but confused as to why it gets hot while stopped?
If I get a definitive answer I'll post it.
Thank again.

Ford 3000 Select-o-Speed PTO operation

Grim

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