massey Hydraulic issue

[JerseySierra]

Hi all,

I recently acquired an MF 180. 1969, I believe. Runs great but makes a terrible high pitched grinding noise above 1000 RPM. Noise stops when second stage of clutch is pushed in. Also, some times briefly goes away if I move aux Hyd. lever. Other possibly related symptom is aux lever remains at either detent position (doesn't return to center on its own as I think it should) and engine doesn't load up at all with lever at either position. 3 point hitch functions as it should (draft, position etc. all function). Multi-power functions properly. I am 99% sure tractor has auxiliary pump for auxiliary hydraulics (no combiner valve or anything).

First, does this sound like a hydraulic pump issue? If so, any suggestions? I am open to pulling the top off the tranny rear (I have done some online research) but I don't want to if I am missing something easy and I am not up to splitting the tractor. Tractor has live PTO (not independent).

For background, I am not a farmer but grew up on a 165 and 175 so I am certainly no expert but I do know enough to get around (and get myself in trouble!)

Thank you for taking the time to read my post.

 

[txturbo]

Is it full of fluid?

 

[Ed of all trades]

Some might know better than me and I can't hear the noise but could it be a releaf valve squalling?

 

[JerseySierra]

Fluid is at correct level and looks clean.

 

[JerseySierra]

That is what it kinda sounds like. Not sure where relief valve is or how to check it.

 

[banjodunn]

G'day sound like oil is not returning to sump (trans) check for blockage on the return hose from the aux valve or maybe has wrong valve on it, it should be an open centre valve so oil can flow straight through to sump with valve in neutral.

Jon

 

[shona13]

G'day Jersey Sierra.
Try moving the position control lever towards the down position a bit and see if that shuts it up.
Hutch.