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I'm a retired fluid power engineer. The whining is caused by the sound of the pressure pulses created by the pump gears, pistons, or vanes depending on which pump type and manufacturer the tractor builder is using. The noise is created by the pressure trapped, in the case of gear pump, between the two gear teeth as the captured fluid enters the discharge port of the pump. The longer the dwell, the noiser it is. Reducing the dwell by moving the inlet and discharge ports closer reduces the noise, but at the cost of efficiency. All pumps are not equal. There are cheap low quality pumps and high quality more expensive pumps. The difference between them can be in the design, material, manufacturing process and quality control. Hydraulics will tend to be noisier at low temperature because the fluid gets thicker. It's good practice to let the tractor run until the fluid in the reservoir warms up. Consult the manufacters recommendation. Whether there's a problem can depend on the sound and performance from when it was new.

There is now a fix for M4 noise. Dealer just ordered my part to fix. Kubota does have fix now. It involves changing a hard line to a flexible hydraulic hose. It goes from the back left side of transmission to a T located bottom left side of of frame.

Really appreciate the showing of wildlife. Love seeing the deer & Tom, especially the Sandhill Cranes.. We don't have them here.

I was a little concerned when I heard the whine on my 2305. I assumed it was normal. Then I started watching KZfaq videos and heard the same sound on new 1025r’s. Great info.

Thanks for another great video!!!! I have a Kubota B3200 2011 model year. There is a set of hydraulic hoses mounted on the ROPS facing backwards with a lever right beside my right elbow!

Funny, when the video first started I wasn't looking and I thought you were operating a dozer. Have ran a ton of equipment over the years and never heard an Ag type rig make noise like that. Generally that sound is coming from the hydrostatic pumps in large earth moving equipment which is normal. Cavitation is distinct due to the erratic high low pitch sound associated with air or lack of hydraulic flow getting to the pump. Consistent high whine is associated with restricted hydraulic flow which can be a multitude of things. Fluid level and filters are always the first item on the diagnostic check. I have had to rebuild plenty of hydraulic internals due to a blown $3.00 "O" ring. Check filters very carefully for metal and / or rubber pieces. Also I have had to rebuild internal hydraulics due to an over zealous use of silicone during factory assembly mucking up small orifices.

Thank you!

Interesting video, thanks for sharing. 👍🏝🚜

I notice on my (new to me last September) 2006 B7800 that occasionally the lever (valve) for the 3 point hitch will not quite return to center, causing oil to go past the valve and back to tank. This doesn't effect mobility, but can inhibit the power or even prevent use of the loader, if the valve is too far off center, the loader won't power down, only go down under float mode. Freaked me out this last winter moving snow, thought I had a hydraulic system problem until I realized what was going on. Now I'm careful to make sure the handle returns to center after adjusting the 3 point height. Hope you sort out the noise. I'm an industrial systems engineer with a lot of industrial hydraulics experience, and whines can be caused by a LOT of things. The noise almost always comes from the main or charge pump, but scavenge pumps can do it occasionally. It's usually "activated" by s specific combination of flows, pressures, temperature, pump speed and oil viscosity. If it's new, look to fluid restrictions like dirty filters, kinked or crushed hoses, or contaminants in the oil. Water or glycol in the system can do it too. If it's there when the system is new, clean and in good condition, it's just a combination that makes an audible sound. It's often caused by a difference in 2 inaudible (outside of human hearing) sounds that mix, causing an audible sound, usually characterized by a cyclic "beat" (which is what yours sounds like to me). It may be 2 pumps hitting specific conditions and "beating" together. Changing one of the variables like tweaking a relief or flow control can sometimes eliminate it, but hydraulic noises can be very annoying and difficult to eliminate. Good luck finding yours, and I hope it's benign.

Thank you for the video

It really sounds like a normal hydro sound and sounds fine to me. Kubotas are a little louder than other brands. Also seems the bigger they are the worse it gets.

My one year old M4073 also suonds like this. And it has since I bought it, brand new, here in Sweden. My dealer said they newer heard of it, of course! Mostly I can get rid of the noice by either engage or disengage the 4-wheel drive.

The 3 point lifting issue is usually a cable out of adjustment where when the handle is all the way up, the 3 point arms are still trying to raise the implement even though the system is already at its max lift height.

Some hoses have plastic liners in them that let loose and will let out a wildly annoying squeal, had this happen on a power steering hose.

Heading to White Cloud now for Turkeys. Good luck.

Great, great video!

When is the best time to check Hydrolick fluid level. Before you use the tractor or after the tractor warms up

My J.D. 3032 started a whine after I changed hydraulic filters and fluid. It's not as loud as the Kubota, but I did notice a change in the sound. That's been a while ago and so far, I haven't noticed any problem.

I had a couple on my cam this morning about 1/4 mile back, they like to roost in some big pines back there. Gooble gooble

All of the orange tractors that I have been around do this.

The noise may not necessarily be from the pump(s). All the valving and bypass valve(s) may introduce noise because there is so much “circuitry” the oil passes through. As much it can be the design of the pump. Some designs are naturally louder than others. Doesn’t mean anything is wrong. Cavitation usually occurs either from insufficient supply to the pump or too restrictive discharge for the pump. Air entrainment will usually make the pump sound like it’s “cutting out” or a gurgling noise. If the pump(s) are located below the hydraulic oil level then they have a flooded suction. Unless the oil level gets low enough, the pump will not starve for oil.

I'm sure you are on orange tractor talk but, there is a TSB from Kubota here in Europe, to alter the hydaulic working pressure of the circuit. The OEM-pressure is 23 bar ( 333 psi). In case, the pressure regulator should be set to 17 bar (246 psi). Ask your dealer, he should know. But have an eye on the 4 WD clutch. Maybe it doesnt't disengage very well. I put it back up to 20 bar (290 psi)

My 2025r tlb whines real loud. I think its the fluid thru the Power Beyond. But good point; I bought new and barely hear it now. Its THERE but I block it out because its normal.

I have a 2021 M4D-071 And the biggest time I notice the whine is when I stop and set the brake and leave the tractor idle. But if I throttle it up with the brake set it seems to go away

I’ve noticed that my 2017 Kabota 2650 loses hydraulic function when I lift 3 point hitch to high

I know on dads L4701 once it warms up it has a whine to it. I will say some of it people don’t throttle up to a good rpm range for oil flow.

What Size Bucket do you have on your M4d? I ordered mine and am wondering if the 72 inch bucket is sufficient. I have a separate snow plow.

I did My home work and bought a hydraulic Shuttle Shift. just that wonderful sound from the Diesel Engine...

We've got a kubota just like it and we think we are having issues with the hydrolics. We can put the bucket on the cutting edge and lift the front end of the tractor just fine. We can put the bucket flat on the ground and it also goes up just fine. But when we have the bucket flat and keep it on the ground, we then try to tilt the bucket down to see if it will lift the front end up, which it doesn't. I hope that makes sense, but I'm not sure if it is supposed to be like that or if there may be a problem.

My New Holland T1520 makes crazy noise if the Hydraulic fluid level is high. When I change the fluid it is hard to see the level on dipstick. Put in what system is supposed to have and it was about a quart too much. Lowered the level to full and sound went away.

On my Kubota 4760HST the only time I hear the hydraulics is in high gear on the road doing 10+ mph. On Deere products the whine may be loudest when the key is in the off position. Ignore the whine, it is the equipment owner.

Where in Michigan are you. Its been horribly wet and cold this spring here

I don’t worry unless my tractor sounds different than normal. One time, I was operating my tractor, and the tractor started sounding like the hydraulics were being maxed out. I immediately shut my tractor off, and found that my power beyond hydraulic connection had somehow come loose. Reconnected and all back to normal.

Please share your secret on how you get your sandhill cranes to be so quiet!!!

2022 has been a nasty spring in Michigan so far.

i have a brand new kubota zero turn with less than 8 hrs on it and it whines at all engine rpm but esp i reverse and i wanna know if that's okay? Fluid level is appropriate but i'm still worried

I occasionally hear a squeal on my 1025r when I use the hydraulics on my front end loader.

You need to know your tractor and all your machines and listen to them. Most people just expect things to work and never read to owners manual. Service, service, service.

It seems Kubota's have a louder hydraulic whine than John Deere tractors. Can you please talk about your trail cam? Thanks!

Ha ha the first time I throttled up my 2025R (just got it) I heard the hydraulic pump whine and thought “Whoa! WTF is that????” 😂 Then I figured “Well, it’s working so far, and I’m totally new to tractors, soooo….” 🤷‍♂️ Oh, and the first time I lowered the bucket with a load and heard a “whoosh” sound…I may or may not have freaked out 🤦‍♂️😂

That’s a huge complaint about the new M4. Has a lot of noise working the loader. A couple buddies of mine have there’s in the shop to try a figure it out. Currently they changed hydraulic oil filters and did a couple adjustments to the pump. But like you said kubota has not put out a notice yet

We have a 2020 4066R Deere. The engine noise when the engine is cold is horrendous. Even once warmed up it's so noisy even in the full cab I usually wear earmuffs.

It is just like tracing a car noise, wireless microphones are a useful tool.

Following im having the same issue

Mobile 424. Lucas hydrualic oil additive.

Why does my older L3240 not whine like my newer L2501 or B2650?

I bought my 1025R new and it didn’t make this sound. But after using it for 7 hours it stopped moving and I checked the hydraulic oil and found that the dealership didn’t fill the hydraulic oil up. And it has been making this loud noise but I added oil and it stopped but had to send it to the dealership and they said it had a little to much oil, and they drained some of it and it’s back being load again.

I can tell it's a Kubota running by that hydraulic whine. Seems to be a trait for them. BTW -- 350 miles south and the weather has sucked just as badly as yours. 10-15 degrees colder than normal with cold east winds and the trees are at least 3 weeks behind schedule.

My old BX2200 didn't whine at all. When I bought a new BX2680, the whine was very annoying. It got louder and louder, as you throttled up, without moving the tractor or the FEL. I went back and asked my salesman to let me go start up another brand new tractor to see if it made the same noise, and he refused and became a jerk. It's been 4 years now, and Larry NEVER called me once to see how I liked my 20k purchase. I still tell people not to deal with Larry, as all he cares about is making the sale. I did talk to the service mgr and he gave me the general, Ya the do have a whine to them.

I have a new LX2610 that make a very load hydraulic whine that’s worse when backing up. The wine is the same even with no attachments. Dealer told me it sounds worse because of the cab.

Hi get the "Tom" , then start the video up after you get him !!!! Priorities ! 😂

Mine comes and goes when turning 4x4 on and off. Also sometimes when pushing the brakes. Annoying.

Cat 336 excavators make alot of hydraulic whining noise.

you are one amazingly disciplined guy, with a gobbler hanging out nearby!! my camo would be on so fact, shotgun on hand, and be out of there!!.....🤣🤣

Keep the missus off the jump seat! 😉

Our almost 40 year old 17 hp Kubota screams when the 3point is all the way up. Yes just put it down a little and it stops. We are getting a new Grand L le in the next few days, but I'm the first to admit that Kubota seems to have a greater whine than other Tractors.

Well, it does say 'Kubota' on it - just kidding! This is one of many examples of why many folks around me are keeping older, more mechanical tractors in service. I know of a few who are refurbing older units for re-sale. I know that it is a big gamble purchasing any used tractor, but the quality control on some of these new units seem to be a bit questionable. So, which will be cheaper and easier to repair? It also looks like parts availability may become a big issue down the pike. It is not an easy decision...

Um, go get the turkey!! We’ll wait!! Priorities man.

Forget the tractor,go get the gobbler Bud

Shooting film instead of gobblers !! Love the videos though …

Kubota's are the worst. Had a few, they're always high-pitched whine.

Cab tractors are noisier than open station tractors? I gotta disagree with ya Courtney. I traded up to a cab last year…ten times quieter than my previous two open station tractors.

When car makers design new cars they run them through extensive road tests for thousands of hours ,do tractor manufacturers do the same ? This kind of problem should never make its way to the consumer .

Man, do the video later...go get that gobbler! Thanks for the video anyway.

Yeah don't sound good. All tractors make noise weather diff, trans, but hydraulics are generally quite.id be looking into the kub 😒

Whine, whine, whine...to a certain point, it's normal to hear this whine...it's the hydraulic pump. Inside the pump, you have "veins," or gears that pumps the hydraulic fluid at very high preasure. It's resistance to the load that makes the noise, just like you put your thumb over the end of a water hose, the pressure increases and the water makes a spewing sound when it does come out. Whine, whine, whine, get use to it! Now, if it continues to get louder, you might start by checking your hydraulic pressure to make sure it's up to specs...I could go on and on, but, I digress...

That noise is normal from the beginning. I hate it. Not just Kubota. Sounds bad and whines like a crying baby. John Deere does the same too.

Gotta question myself on wanting to buy a tractor with all the issues guys are posting. Poor dealer support no factory support and breakdowns that continually happen. I'm thinking just hire somebody to take care of the work it has to be more cost effective and a whole lot less aggravation than buying one of these money eating machines.