GC 2600 Has anyone replaced the control valve line filter?

[Dinico]

Hi, long time reader, first time poster.

I have a GC2600, bought used with about 400 hours on it. A great machine. Now has 650 hours. I have developed a constant whining sound that has gotten louder over time. Makes me anxious.

I pinpointed the sound is coming from the solid steel hydraulic line that connects to the PTO engage lever. #11 on the diagram. Used a mechanics stethoscope and it nearly blew out my eardrums. The sound is the same no matter the RPMs or whether the PTO is engaged or not.

I just changed the hydraulic filter, fluid, and cleaned suction filter. Cut the filter open. No metal or debris in filter. Suction filter was clean. Very slight shimmer of metal in the fluid. Fluid looked good, wasn't burnt. Last changed at 500 hours.

I used a NAPA gold cross-referenced filter at 500 hours. Replaced with OEM AgCo filter.

The noise was quieter, but still persists from the same line. Has anyone had to replace the valve (#12 on diegram) part# 4265235M2 on the PTO engage lever? Can't find a picture of the actual valve. It's $44, so may be worth changing.

Not sure if this is related to my whining sound, but the other thing I found in the parts book is a line filter (#16 on the second diagram) part # 3757286M2 sandwhiched between the control valve and the pump. The pumps connects to the block near where the #11 PTO line connects to the block. Interesting place for a tiny screen filter. I found a pic of the underside of the control valve showing the line filter location. Has anyone ever cleaned or replaced this $24 filter?

Thanks for any advice or suggestions.

 

[Dinico]

Here's a bit more info on this line filter. From what I've found, nearly all GC series tractors have this filter and many other MF tractors. I searched the internet for any thread or mention of anyone replacing it. There are dozens of listings selling this part. 3757286M1 then was superceded to 3757286M2. Pic is below.

Really, wanted a second opinion on whether to bother changing it since it would require some serious effort. Here's a pic of the filter.

 

[5030]

Clean, don't change it. Those filters are designed to be cleaned in clean diesel fuel and /or clean paint thinner, blown off and put back in. Whining is typical of any hydro and can increase if you use the wrong or cheap fluid or extend the change intervals way past the recommended change interval, something I never do as cheap fluid can lack the proper additives to prolong seal life. Even the pump on one of my gear drive hydraulic shuttle tractors whine and always has. I ignore it and chalk it up to the previous owner who most likely didn't change the fluid at the proper interval, but my whine is coming from the orbital steering motor as all Kubota's use an orbital motor to control steering.

Soon as I bought the used one (4K hours), I did a complete fuiid and filter change and used genuine Kubota filters, not aftermarket as well as the air filters, again, genuine Kubota. Buying any used equipment ine never knows if the previous owner adhered to the change intervals of if he even used the correct fluid so wgy take the chance, just change everything and grease it as well.

My Kubota's both require 15 gallons each to change the fluid and no Tractor supply cheapo juice either, you always get what you pay for and cheap is always suspect.

I use Chevron All Weather synthetic THC which actually costs more than Kubota SUDT per gallon but the THC exceeds the Kubota OEM fluid. I depend on them bith for running hay and doind other tasks so I don't leave anything to chance. At 125 bucks a pail, not a cheap date by a long shot.

I've had the whine in the one unit all along and I ignore it. When and if it fails-breaks, I change out the offending part and continue on. Mine is way more pronounced in cold weather actually. Below freezing especially. The other one that I bought new has never whined at all and the whine is actually the pump causing vibration in the fluid that is amplified by the steel lines that carry the fluid to the components. On mine, the pump alone is well over a thousand bucks and not rebuildable so when it pukes, I'll buy a new one and install it.

If I were you, I'd ignore it until it fails and then replace the failed components.

 

[dicktill]

Hi, long time reader, first time poster.

I have a GC2600, bought used with about 400 hours on it. A great machine. Now has 650 hours. I have developed a constant whining sound that has gotten louder over time. Makes me anxious.

I pinpointed the sound is coming from the solid steel hydraulic line that connects to the PTO engage lever. #11 on the diagram. Used a mechanics stethoscope and it nearly blew out my eardrums. The sound is the same no matter the RPMs or whether the PTO is engaged or not.

I just changed the hydraulic filter, fluid, and cleaned suction filter. Cut the filter open. No metal or debris in filter. Suction filter was clean. Very slight shimmer of metal in the fluid. Fluid looked good, wasn't burnt. Last changed at 500 hours.

I used a NAPA gold cross-referenced filter at 500 hours. Replaced with OEM AgCo filter.

The noise was quieter, but still persists from the same line. Has anyone had to replace the valve (#12 on diegram) part# 4265235M2 on the PTO engage lever? Can't find a picture of the actual valve. It's $44, so may be worth changing.

Not sure if this is related to my whining sound, but the other thing I found in the parts book is a line filter (#16 on the second diagram) part # 3757286M2 sandwhiched between the control valve and the pump. The pumps connects to the block near where the #11 PTO line connects to the block. Interesting place for a tiny screen filter. I found a pic of the underside of the control valve showing the line filter location. Has anyone ever cleaned or replaced this $24 filter?

Thanks for any advice or suggestions.

Here's a bit more info on this line filter. From what I've found, nearly all GC series tractors have this filter and many other MF tractors. I searched the internet for any thread or mention of anyone replacing it. There are dozens of listings selling this part. 3757286M1 then was superceded to 3757286M2. Pic is below.

Really, wanted a second opinion on whether to bother changing it since it would require some serious effort. Here's a pic of the filter.

Welcome to the forum.

My later model GC1723EB is plumbed a bit different with that PTO supply line routed internally via drilled passageways in the transaxle housing, but the system works the same. (see How Massey Ferguson GC 1723 & 1725 hydraulics are plumbed) I am aware of the filter/screen between the control valve and the pump but have never accessed that.

One possible candidate is the PTO relief valve which is oddly located by the hydraulic oil filter; it will be items 6-7-8 on your first diagram and should be easy to access.

 

[Dinico]

Thanks for that advice.

Clean, don't change it. Those filters are designed to be cleaned in clean diesel fuel and /or clean paint thinner, blown off and put back in. Whining is typical of any hydro and can increase if you use the wrong or cheap fluid or extend the change intervals way past the recommended change interval, something I never do as cheap fluid can lack the proper additives to prolong seal life. Even the pump on one of my gear drive hydraulic shuttle tractors whine and always has. I ignore it and chalk it up to the previous owner who most likely didn't change the fluid at the proper interval, but my whine is coming from the orbital steering motor as all Kubota's use an orbital motor to control steering.

Soon as I bought the used one (4K hours), I did a complete fuiid and filter change and used genuine Kubota filters, not aftermarket as well as the air filters, again, genuine Kubota. Buying any used equipment ine never knows if the previous owner adhered to the change intervals of if he even used the correct fluid so wgy take the chance, just change everything and grease it as well.

My Kubota's both require 15 gallons each to change the fluid and no Tractor supply cheapo juice either, you always get what you pay for and cheap is always suspect.

I use Chevron All Weather synthetic THC which actually costs more than Kubota SUDT per gallon but the THC exceeds the Kubota OEM fluid. I depend on them bith for running hay and doind other tasks so I don't leave anything to chance. At 125 bucks a pail, not a cheap date by a long shot.

I've had the whine in the one unit all along and I ignore it. When and if it fails-breaks, I change out the offending part and continue on. Mine is way more pronounced in cold weather actually. Below freezing especially. The other one that I bought new has never whined at all and the whine is actually the pump causing vibration in the fluid that is amplified by the steel lines that carry the fluid to the components. On mine, the pump alone is well over a thousand bucks and not rebuildable so when it pukes, I'll buy a new one and install it.

If I were you, I'd ignore it until it fails and then replace the failed components.

Thanks for the advice. After some research, just on the hydraulic filter I found that there are a few variations that cross-referenced to the OEM filter, but the number of inlet holes varied. 8, 5, or 6. They could very well be the same specs though.

6 is the AGCO OEM filter from the dealer.

 

[Dinico]

Welcome to the forum.

My later model GC1723EB is plumbed a bit different with that PTO supply line routed internally via drilled passageways in the transaxle housing, but the system works the same. (see How Massey Ferguson GC 1723 & 1725 hydraulics are plumbed) I am aware of the filter/screen between the control valve and the pump but have never accessed that.

One possible candidate is the PTO relief valve which is oddly located by the hydraulic oil filter; it will be items 6-7-8 on your first diagram and should be easy to access.

I had actually read your post a couple of times previously. It was one of the only mentions I found about the "line filter" after discovering it in the parts book.

So that's the PTO relief valve. The parts book called them spring, ball, and body.

I'm really not feeling up to cleaning that tiny "line screen". Where the gear pump connects to the transmission is directly next to where the solid steel line from the PTO clutch lever connects. That line being the source of the constant whining.

I assume that the gear pump runs constantly which could be causing the excess whining. There are times when I start the tractor and there's no whining. Usually after it's been unused for several days or when I change the fluid. But it always comes back.

I wonder if that "line filter" has some debris that settles out, then gets pushed back in after running. I may be over thinking it.

I'm don't know how the PTO clutch engage lever valve works internally. Or if they are known to be faulty. It's just a snap ring holding it together. Would rather examine it than tear down the tractor to get to the "line filter". There shouldn't be anything in the line filter because it looks like it's directly after the suction filter.

 

[5030]

On oil filters, it really don't matter how many holes there are in the bulkhead end. so long as there is enough to pass the oil in an efficient manner. You'd be amazed at how oil filters are made. Prior to retirement, I regulary delivered strip steel to an outfit in Cleveland, Ohio thst made oil filters for many different brands. They actually were all the same inside, only the outer case color changed and the labelling and they would brand change on the fly, different paint applied as well as different labels without ever stopping the line at all. All they made were oil filters for everyone.

 

[DMW]

Sounds more like the tractor hydraulic fluid you are using. Do you know the Viscosity Index of the hydro oil?

 

[cdaigle430]

Am I missing something here? All GC2400s and 2300s have at least some whining sound from the transmission and its normal.

 

[Dinico]

I was trying to determine if I was missing something and if anyone had cleaned the "line screen" or replaced the PTO clutch engage lever valve which is where my whining noise is coming from.