[dieselshadow]

Welcome to GTT!

I tore apart and rebuilt the main hydraulic pump on a 2150. Here's a post within that thread you may find helpful. There were a lot a variations and options to these machines, so it can be difficult to narrow down what you have or what the main issue is.

Rebuilding the main pump wasn't difficult, but in a running tractor it will be more difficult to get it removed than an actual overhaul. That being said, it could be a different issue altogether. Some further troubleshooting and testing is in order. Can you use the screwdriver trick to narrow down where the noise is coming from?

If you haven't done this before, it's quite easy. Simply take a long screwdriver and touch the object you want to listen to, then lean your ear and press the handle firmly into your ear. You'll "hear" the component you have the screwdriver on. Be careful to use something long so you don't get caught up in rotating stuff. A nice handle also helps, you don't want to stab yourself in the ear. LOL

 

[dieselshadow]

Check the lines and make sure they are rubbing/abrading each other or the frame. It sounds high pitched in your video. Could be a relief valve or something bouncing too. The video helps, but this will be tricky at best to diagnose over the internet.

 

[dieselshadow]

Noises are hard to determine source of in videos, but this almost sounds like the fan hitting the fan shroud. Check water pump bearing for excess play in fan and also make sure radiator is not pushed back into the fan. If the front of hood or grille area gets bumped, radiator gets pushed back pretty easily.

I had that exact issue on the 2150 I worked on. Good call sir. :thumbup1gif:

 

[dieselshadow]

Boy not knowing how the hydraulic pump works that sounds like a high speed loose Tappet sound? Something has play metal to metal. Is the pump a rotary style pump with several little pistons? It is a small sounding metallic tick to me. I would be looking at how the hydraulic pump is built for free moving pistons that are moved in a rotary motion but I could be very wrong too.

I tore apart and rebuilt the main hydraulic pump on a 2150. Here's a post within that thread you may find helpful. There were a lot a variations and options to these machines, so it can be difficult to narrow down what you have or what the main issue is.

Check out the link I posted earlier in the thread. You can see how the pump works and is assembled. Your assumption is correct. It is a rotary with radial pistons the drop down as the pressure is needed. Once up to pressure, they stay "up" away from the eccentric shaft allowing the pump to "freewheel" if you will.

 

[dieselshadow]

The system is self bleeding, no need to worry about that.

Open the rear oil fill cap on the rear of the tractor while it’s running. Look inside with a flashlight. Do you see or hear any spraying of oil?

Another thing to check, oil level and quality. What does the oil look like? Is it up to level? Does the surge tank up above the pump ever get warm?

 

[dieselshadow]

I would suggest changing the fluids/filter/cleaning the suction screen as well. Look at that thread I linked to earlier. Lots and lots of pics that could answer your questions and get you more familiar with your 2150. :thumbup1gif:

 

[dieselshadow]

I’d be more concerned with the milky appearance of the oil. That indicates water contamination. Check the shifter boots for tears and make sure they are attached at the base. This is where most water makes it’s way into the system. Water will destroy your brakes and PTO linings and cause general havoc in your hydraulic system.