Looking for Help!

[headfirecracker]

Wow, it could always be worse I guess. I also saw that youtube link. Tried to post pdf of motor in question maybe phone just not upto it. Hopefully central hydraulics will call back soon.

 

[headfirecracker]

They called back, don't have any in stock, but they do have parts. So I will rebuild. For future reference the part no is:600375W2122AAAAA

 

[ponytug]

Congratulations on getting the part run down!

Good luck on the rebuild. My $0.02 would be to remember to really bleed the motor when you do the install. You want to get all the debris out since the oil is recirculated, and you want to get all the air out or the drive will be squishy for awhile. (Not to mention the added wear on the pump and motors due to the foaming.)

All the best,

Peter

 

[J_J]

To make a best guess at the displacement by measuring the fluid, you could fill the pump with the ports up and have a supply of fluid to flow into the motor.

Turn the motor 10 revolutions, and then divide the fluid expelled by 10 for cu in displacement.

If the pump is fairly tight, that should be a good determination of the motor displacement.

On my 1445, I believe the front wheels are paralleled with the back wheels.

When I raise the front end, and spin one front wheel, the other front wheel also spins.

I am assuming the front wheels are in series and one wheel acting as a pump will cause the other wheel to act as a motor.

 

[ponytug]

J.J.-
Just a quick question: With the motor off, and both wheels off the ground, do both your wheels turn the same, or opposite directions. Same = Series, Opposite = parallel.

All the best,

Peter

To make a best guess at the displacement by measuring the fluid, you could fill the pump with the ports up and have a supply of fluid to flow into the motor.

Turn the motor 10 revolutions, and then divide the fluid expelled by 10 for cu in displacement.

If the pump is fairly tight, that should be a good determination of the motor displacement.

On my 1445, I believe the front wheels are paralleled with the back wheels.

When I raise the front end, and spin one front wheel, the other front wheel also spins.

I am assuming the front wheels are in series and one wheel acting as a pump will cause the other wheel to act as a motor.

 

[J_J]

The front wheels turn opposite of each other in the raised position, with engine off.

The two back wheels were on the ground, so no fluid was going through them.

When I turn one one front wheel fwd, the other front wheel turns in reverse.

With all 4 tires/wheels on the ground, they all move in the same direction.

 

[MossRoad]

The way I see it, the wheels on the same side can never be in series or you couldn't turn the tractor without skidding it.
As noted, of you are stationary and crank the wheel all the way to the left, the left front tire rolls backwards while the left rear tire rolls forwards.
And on the right side the right front tire rolls forwards while the right rear tire rolls backwards.
Therefore, the left front tire and the right rear tire are rolling in the same direction, meaning they are in series.
The same goes for the right front tire and left rear tire both rolling in the other direction, so they are in series.
And both of those two series circuits are then hooked up in parallel to allow for independent operation where they can bypass/force each other.
It ingenious! :laughing:

 

[J_J]

Does anyone have a good hyd schematic of their PT, and can check the series parrallel arrangement.

The arrangement may be different from the small PT's to the larger ones.

My observation was done by trial and error.

 

[Gravy]

They called back, don't have any in stock, but they do have parts. So I will rebuild. For future reference the part no is:600375W2122AAAAA

Have you tried these folks? White: White Hydraulic Motor Superstore When I built my post auger around 2006, I bought a 24 cu in White motor from them for $300.

 

[MossRoad]

J_J,
I'm looking at my schematic for my 2001 PT425 right now.
It clearly shows two sets of two wheel motors hooked in series.
One side of those two series circuits join together in a Tee and go into an upper port on the variable volume pump.
The other side of those two series circuits join together in another Tee and go into a lower port on the VVP.
So it appears to be two series circuits running in parallel.
What I cannot tell from the schematic is which wheel motor is located where on the machine. They are not labeled.
Sometime when it gets warmer, I'll trace them out manually and label them on my schematic.
It does show a line coming from the tank, to the filter, to the VVP, then out the VVP, through the cooler and back to the tank.
So the only cooling and filtering is going to be any makeup oil to the charge pump section of the VVP.
I have no idea what that flow is. I know its significant enough to turn on the thermostat to start the fan.

 

[J_J]

If you get the chance, raise the front end ans spin one wheel and see what happens.

You might be able to push down on the bucket,which will raise the front, shut the engine off and spin the tires.

 

[headfirecracker]

BACK IN BUSINESS!!:cool2: Well the rebuild went way smoother than expected. :shocked: The rock was a pain but it was cracked down the center and rotten on the bottom. I still have two very large pieces that I worked about 2hrs trying to get out of the ditch, but they are out now. If I can get the big one out enough to get behind it, I think I can manage. Try again tomorrow water is draining again finally. We have had too much rain and snow in the past weeks.