FRONT (DOUBLE-SPOOL) REMOTE VALVEASSEMBLY Squawking noise

Mtsoxfan · Jul 12, 2023

On my New Holland TC29D at normal operating temps, fluid filled, there is a squawking noise, much like the squawking noise when cold, that happens when the bucket is curled all the way up at it max. or when it is curled down to max. (edit, I don't normally raise or lower bucket to max. but tried and they squawk as well)
I've read other posts that had a squealing noise from pump, I checked and tightened the filter, hose clamps, and checked all steel pipe connectors. The hose clamps did tighten up a bit but were not loose. Fluid is at top of range, not bubbles seen on dipstick.
Looking through repair manual, there are no filters in the assembly, and I didn't see anything in the troubleshooting section. There is a relief valve, but I'm not sure if it's related to my issues. I do not have the necesary pressure testing equipment.
Any ideas of what to check?

Harry in Ky · Jul 12, 2023

Has someone been changing, adding, removing, or otherwise modifying any hydraulic hoses or fittings recently?

I get the impression it has a loader. what all (hydraulically speaking) currently works and what doesn't?

oldnslo · Jul 12, 2023

Is the noise present when operating the loader and not at end of stroke on any function?

Does operating 3 point or power steering make any difference in noise?

Mtsoxfan · Jul 13, 2023

Nothing has been worked on or modified. I have been moving a lot of stone etc. With loader since i bought. Only makes noise at range limits. Everything works as normal. I did stall tractor twice when lifting stone.

oldnslo · Jul 13, 2023

If only at range limits it sounds like oil going over system relief valve when cylinders bottom out or you try to lift or curl to heavy of a load.

Mtsoxfan · Jul 13, 2023

Thanks. Is there a solution to that?

oldnslo · Jul 13, 2023

Mtsoxfan said:
Thanks. Is there a solution to that?

No easy solution that know of. Changing spring design, cavity - seat diameter, etc. can change frequency at which the relief will go unstable and squeal. Other solution use this as an audible warning that you are exceeding the limits of your loader.

Mtsoxfan · Jul 13, 2023

It only recently started squawking at limits. And it was recently that I stalled engine twice using loader. Maybe connected, maybe not, but am still searching to see if this is somehing I can fix or need to search out alternatives. I could use it as an audable, which I don't need, but instead I'm trying to figure out the why it is squawking and how to fix.
Thanks for your input...

Harry in Ky · Jul 13, 2023

If it is a/the relief valve, maybe you should consider putting a pressure gauge into the system to monitor what pressure is being developed while all this is going on. It will require some fittings and/or adapters on your part, but it's the logical starting point for any hydraulic trouble shooting of this sort.

The main system relief valve is in the block down on the right side where the three lines to and from the loader valve connect. If the relief is the squeal, you can probably pinpoint it to that area and feel it vibrate when the sound is present.