NH TN75 Hydraulic Problem

[mustangmarty1967]

The Loader and 3-point hitch do nothing, but the steering and transmission both work fine. Does a New Holland TN75 have just one hydraulic pump that runs everything? Or is there a second hydraulic pump that runs the loader and 3-point separately from the steering and tranny?

 

[TractorTech]

It uses a steering pump, rear pump on LH side of engine and main hydraulic pump on the front side. May be an air leak on the suction side or broken drive or shaft

 

[mustangmarty1967]

So, three hydraulic pumps then? Since the steering and tranny work, which pump should I focus on first? The rear pump on the LH side of the engine or the main pump on the front of the engine?

 

[Harry in Ky]

I think you're both confused. The TN series has two pumps, both on the RIGHT side of the motor. The one on the front of the timing cover is hydraulics, the one one the rear (under the injection pump) is steering/transmission circuits. They share a common suction and filter, and each drive off opposite ends of a timing gear Fiat refers to as a PTO gear.

 

[TractorTech]

So, three hydraulic pumps then? Since the steering and tranny work, which pump should I focus on first? The rear pump on the LH side of the engine or the main pump on the front of the engine?

Oops, right, left sorry. It is the right front. Two pumps mounted on engine cover