2305 John Deere hydraulics

[Boznaros]

I have a 2305 John Deere with a loader and belly mower. I dont have any auxiliary hydraulic. My issue is after the tractor has ran a while the loader slows down and I can’t get the mower deck to raise. Any suggestion?

 

[TractorTech]

How many hours do you have on this tractor? First thought with the little bit of information here is that the hydraulic pump is worn out. When the oil warms up and the oil becomes more viscous, the pump pushes less oil through the system lowering the pressures.

 

[Boznaros]

700 hours

 

[Boznaros]

If I remember correctly it is a 2010 so not a lot of hours for this tractor

 

[TractorTech]

Not many hours for pump failure. The only way to determine what is going on is to put a pressure gauge on the hydraulics.
When the oil is cold, can you pickup the front of the tractor with the loader?

 

[ovrszd]

Following. Curious to hear outcome.

 

[Boznaros]

Not many hours for pump failure. The only way to determine what is going on is to put a pressure gauge on the hydraulics.
When the oil is cold, can you pickup the front of the tractor with the loader?

Yes even when it is warm it will pick up the front it is just slow doing so

 

[ovrszd]

Very interesting. What you say would indicate good pressure, just poor flow?

 

[loggin]

Yes even when it is warm it will pick up the front it is just slow doing so

Have you checked hydraulic fluid level? Fluid condition, is it milky in color? Does this machine have a screen for the fluid? Just some initial things to go over.

 

[TractorTech]

Yes even when it is warm it will pick up the front it is just slow doing so

Also, do you have to rev the engine to do this when the oil is warm vs idle to mid rpm when it is cold?

 

[Boznaros]

Have you checked hydraulic fluid level? Fluid condition, is it milky in color? Does this machine have a screen for the fluid? Just some initial things to go over.

Level is good just changed fluid and filter last summer. Good color

 

[oldnslo]

Is the pump and or loader valve some place that is accessible? If yes does either one warm up quickly when trying to raise loader? A failing pump will typically get warm much quicker than rest of the system.

 

[Boznaros]

Also, do you have to rev the engine to do this when the oil is warm vs idle to mid rpm when it is cold?

I do have to rev above idle but not full throttle

 

[Boznaros]

Is the pump and or loader valve some place that is accessible? If yes does either one warm up quickly when trying to raise loader? A failing pump will typically get warm much quicker than rest of the system.

I believe the pump is inside the rear end and the valve is under the sheet metal

 

[msb1766]

Is there a valve that controls the lift of the mower, like the 3 point hitch has?

 

[dodge man]

I own a newer 2025r. Mine has both a hydraulic oil filter and a sump screen. Does yours have a similar setup? Did you clean the sump screen if you have one? They can get pretty gummed up. I’d still pull the screen and see what’s there. You will probably end up having to drain the fluid but you can reuse it if it’s clean.

 

[MTGreen]

Level is good just changed fluid and filter last summer. Good color

Did you clean out the pickup filter also along with the spin on filter?

2305s have the loader/3pt hydraulics pump integrated into the hydrostat as a second piston pump riding on a fixed eccentric just below the variable piston pump coming off of the engine drive shaft.
They also have a linkage from the three-point that operates the belly mower lift so there's not separate hydraulics for the belly mower

 

[Boznaros]

Is there a valve that controls the lift of the mower, like the 3 point hitch has?

The belly mower is lifted by the three point arms

 

[Boznaros]

I own a newer 2025r. Mine has both a hydraulic oil filter and a sump screen. Does yours have a similar setup? Did you clean the sump screen if you have one? They can get pretty gummed up. I’d still pull the screen and see what’s there. You will probably end up having to drain the fluid but you can reuse it if it’s clean.

I did not pull the screen. Didn’t know about it till after I drained and refilled the hydraulic oil. I will pull that. If nothing else to check for metal on the magnet

 

[ovrszd]

I did not pull the screen. Didn’t know about it till after I drained and refilled the hydraulic oil. I will pull that. If nothing else to check for metal on the magnet

Yes. I don't think the screen itself is the problem. But yes, you will get to check for mechanical failure within the transaxle. I'm still optimistic that this is a valve issue. But I just can't quite explain how. Hoping for a easy/cheap fix.