Hydraulics TC29D

[Mark55]

I just changed all the fluids and filters on my TC29D. I used all the OEM parts and oil from the dealer. I noticed the hydraulic lift is making a squealing noises, especially when it is cold, once it warms up, the noise is almost gone. On low idle, there is no noise what so ever, once on faster idle the noise begins. Any one have any experience with this issue or have an idea of what might be the cause? Perhaps an adjustment to certain areas?

Thanks

 

[MikePA]

This is a common 'problem' in cold climates. The oil is thicker when cold and doesn't flow as well. The fact the noise almost disappears when things get warmed up proves this.

Anything that gets the oil warmed up faster will help. There's no adjustment to fix this.

When i changed my hyd fluid, I used Amsoil synthetic, which flows better when cold. Something to consider at your next change.

 

[Spicer]

The Three Point Hitch squeals?

Is the TPH flow control valve open? The valve is located below the seat, turn it counter clockwise.

Mike

 

[Mark55]

Thanks Mike. I just bought the tractor 6 months ago so I'm new to this and don't know much about it.

Spicer (Mike)- if the tractor idols then the hydraulics don't make any noise, but as soon as you increase to 20RPM it starts squealing when you use the hydraulics until it warms up. It then slowly disappears. Thanks, I did open the valve all the way.

Thanks

 

[Spicer]

Causes of Squealing:
Aeration: Pumps suction side plumbing air leak, foaming of the oil in the reservoir or low oil level.
Cavitation: Pumps suction side blockage(clogged strainer or filter).
Pressure relief valve:

Aeration can be heard in the pump and the hydraulic valve. In the pump it sounds like buzzing and in the valve it sounds like squealing as the tiny bubbles pass through it.

Cavitation without Aeration can only be heard at the pump.

If the hydraulics only squeal when actuating the TPH cylinder when cold I would think that you have foaming of the oil in the reservoir. As the temperature rises the viscosity becomes thinner then the bubbles can rise to the surface faster.

Make sure that the hydraulic/transmission oil dip stick shows full.

Mike

 

[Mark55]

Thank you Mike,
The squealing is more when you actuate the front loader more then the rear TPH. Where is the pump located? I am very new on tractors, so what should I really check for? The oil reservoir is full as shown by the dip stick. I have seen just a couple of small drops on the ground coming from the hydraulic manifold block/diverted valve, is that possibly the cause?

thanks again.

-Mark

 

[Spicer]

Mark,

If the sound is more of a whistling(mono tone) this may be normal. Fresh oils have a higher viscosity than the older oils. This is the result of the oil molecules being constantly sheared in to shorter lengths. Higher viscosity oils tend to whistle in a valve when the pressure drops across a restriction and creates a small amount of cavitation behind the restriction.

The oil for your tractor should be marked 134D.

On the other hand if the hydraulic systems is actually squealing you should attempt to find where the noise is coming from. You may have to let the system warm up to identify.

The hydraulic pump is on the right side of the engine.
View attachment HYDRAULIC PUMP %26 PIPING.pdf

Since your tractor has a front end loader the diverter valve should be in the 11 o'clock position.

Mike

 

[MikePA]

Thank you Mike,
The squealing is more when you actuate the front loader more then the rear TPH. Where is the pump located? I am very new on tractors, so what should I really check for? The oil reservoir is full as shown by the dip stick. I have seen just a couple of small drops on the ground coming from the hydraulic manifold block/diverted valve, is that possibly the cause?

Mark, your TC29D is operating normally and has been since post #2.

It's cold in Michigan, the oil is thicker when it's cold. The noise goes away when the oil warms up.

Use and enjoy it.

 

[Spicer]

Mark,

MikePa is probably right, I'm being an alarmist.

A hydraulic system will buzz, whistle and hum, but it shouldn't squeal.

If you have any doubts post a video while running at 2000rpm cold.

Also J_J is an excellent second opinion.

Mike

 

[MikePA]

Mark, I agree with Spicer, if in doubt, post a video. The other 'problem' is we all probably have different definitions of buzz, whistle, hum and squeal. I use my TC25D just now to plow the 3 inches of snow we received. Outside temps were in the mid 20s and I have my tractor in an unheated garage. I let the tractor run while I shoveled around the cars. When I climbed on the tractor, the temp gauge was in the middle, normal. However, the hydraulics made noise as I used the FEL to plow the snow. It took 10 - 15 minutes of using the FEL before things quieted down.