TW30 transmission oil pump control valve?

Tractorcedric · Sep 8, 2020

So I have the tractor split and I decided to take a closer look at the oil pump control valve. Because it was now easy yo get to. The service manual said to make sure that the orifice between the pressure and lube spools was not plugged. As I was checking it out I noticed that the steel sleeve for the pressure spool had a piece missing. Like someone had tried to remove it and it broke instead of unscrewing. Hope the picture worked. If someone had backed it out some, would that change the pressure? I had this tractor all back together once and the dual power worked, but the pressure readings were low.

Bern · Sep 8, 2020

I would agree, looks like someone has had it out before and cracked a chunk out of it. That said, it doesn't look like it would be an issue to me. Make sure it's tight and put the valve back together.

I thought you said that the pump inlet tube was bent and not fully inserted into the transmission? If so, I bet that's your entire problem right there.

Tractorcedric · Sep 9, 2020

Yeah, I just wanted to check all of the possible places it could lose pressure. Thanks Bern!

Bern · Sep 9, 2020

Lube up the snout of that pipe with vaseline before you put it back together so it slides in easily. Same thing with the receiving end on the back of the tranny. I'm sure you don't want to split it again a 3rd time.

Tractorcedric · Sep 9, 2020

I have it lubed up and now I have it close to back together. At 7/8 inch it stopped and I can't get it to wiggle together. How can I turn the output shaft of the transmission? I don't have the shift cover off. The drive coupler and the pinion shaft are not chamfered at all.

Bern · Sep 10, 2020

What I do is attach a remote start switch to the starter and bump the engine as I'm putting the squeeze to it with a big pair of channel locks. I usually have a friend helping me on the other side with a similar pair of channel locks.

Even with the trans in neutral, bumping the starter usually makes the output shaft rotate just enough for alignment. If it doesn't, you can put the trans in gear by manipulating the gear shift levers on the RH side of the case.

The drive coupler and pinion should be chamfered - at least they were from the factory. If necessary, take a pencil grinder to the splines and put your own chamfer into it. Doing the same thing to the PTO hub really helps also.

bobwhitecar · Sep 11, 2020

when i am putting a tractor back together after a split i get it close to where it stops and then i use a bar and turn the flywheel and that lines up the splines

Bern · Sep 11, 2020

In this case the rear of the transmission is being joined up to the rear axle. The only way to turn the flywheel by hand is to remove the starter. It's much easier to bump the starter with a remote start switch. If I'm joining the front of the tranny to the engine, I do as you do.

TW30 transmission oil pump control valve?

Tractorcedric

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Bern

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Tractorcedric

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Bern

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Tractorcedric

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Bern

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bobwhitecar

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Bern

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