TN75DA Hydraulic pump change (Which one)

KYTIMM · Jan 17, 2020

Hello everybody,
The hydraulic pump on my TN75DA is out. Power Steering is operational. I have ordered the new pump and ready install. The dual pumps on the tractor look identical from the outside. Does anybody know which pump is for the hydraulics?
The pumps are on the right side of the tractor, and when standing on that side they are facing front to back.

RickB · Jan 17, 2020

The aux hydraulic pump is in front of the timing cover. Did you order the correct pump? There are choices.

KYTIMM · Jan 17, 2020

Don't know Rick. I ordered the one that's in the book. Got the part number from Messicks. Both pumps are on the right side of the engine, one facing foward, one facing backward.

RickB · Jan 17, 2020

Well if the pump was not ordered with regard to determining if your tractor is equipped with a 12 or 16 GPM pump you are rolling the dice. I would expect if Messicks gave you the part number that you supplied them with your tractor serial number.

KYTIMM · Jan 17, 2020

Yes I did. Its a 16. Which one is the loader and lift pump?

RickB · Jan 18, 2020

KYTIMM said:
Yes I did. Its a 16. Which one is the loader and lift pump?

Asked and answered above.

Tx Jim · Jan 19, 2020

May I ask what type of hyd diagnostics were performed to determine that hyd pump had failed?

Over the many yrs I have been associated with tractors I have witnessed & read about many hyd pumps being replaced only to determine that the replaced hyd pump was not the problem.