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Discussion Starter #1
I think maybe all three use the same hydraulic pump but set at different pressures. 1023= 2150psi, 1025r= 2,000 psi, 2025r= 2150 psi according to JD
Anyone know if it is in fact the same pump?
 

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Some diligent searching in JDParts would get you the answer:

www.jdparts.com
 

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The part # for the 2025 pump is LVA20924 and the part # for the 1023/1025 is LVA19035. Couldn't tell you the difference but maybe that'll help.
 

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The part # for the 2025 pump is LVA20924 and the part # for the 1023/1025 is LVA19035. Couldn't tell you the difference but maybe that'll help.
Part Number:
LVA20924
Part Price:569.90 USD
On Hand:
0 Check Other Stores
Description:Hydraulic Pump - HYDRAULIC PUMP, PUMP, 9.0 CC

Part Number:
LVA19035
Part Price:654.36 USD
On Hand:
0 Check Other Stores
Description:Hydraulic Pump - PUMP, 8.0CC KK
 

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pump

the 2025R gen 2 pump has more volume to compensate for the greater steering force needed for the larger tires , have though about putting on my 1025R to increase volume but that will not increase PSI that is controlled by the PSI regulator in the manifold , I think it will make the hydraulics more responsive but haven't wanted to spend the money on speculation
 

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Discussion Starter #6
Part Number:
LVA20924
Part Price:569.90 USD
On Hand:
0 Check Other Stores
Description:Hydraulic Pump - HYDRAULIC PUMP, PUMP, 9.0 CC

Part Number:
LVA19035
Part Price:654.36 USD
On Hand:
0 Check Other Stores
Description:Hydraulic Pump - PUMP, 8.0CC KK
Great, now I need to find a drawing for each to ascertain if there are any external physical differences. The jd published pressure for the 1023 and 2025r is 2150psi and the 1025r is 2000psi. I'll bet the pumps are the basically the same
 

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Discussion Starter #7
the 2025R gen 2 pump has more volume to compensate for the greater steering force needed for the larger tires , have though about putting on my 1025R to increase volume but that will not increase PSI that is controlled by the PSI regulator in the manifold , I think it will make the hydraulics more responsive but haven't wanted to spend the money on speculation
sounds like your going down the same road I am. I thought the steering pump was a separate pump. So the pressure regulator is in the manifold? Humm......guess I need to order the shop manual.
 

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Discussion Starter #8
Part Number:
LVA20924
Part Price:569.90 USD
On Hand:
0 Check Other Stores
Description:Hydraulic Pump - HYDRAULIC PUMP, PUMP, 9.0 CC

Part Number:
LVA19035
Part Price:654.36 USD
On Hand:
0 Check Other Stores
Description:Hydraulic Pump - PUMP, 8.0CC KK
interesting; I can get a drawing of the 2025r pump and system but all I find for the 1025R is the part number and a link to order the part. What are they trying to hide I wonder?
 

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pump

it will bolt up i have no doubt of that it uses the same gasket hose and hardware on both the 1025R and the 2025R , just not sure how much the extra volume will help
 

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interesting; I can get a drawing of the 2025r pump and system but all I find for the 1025R is the part number and a link to order the part. What are they trying to hide I wonder?
You could be right. Below are the illustrations for the two pumps. Unfortunately they chose to show a front view for the 1-series pump and a rear view for the 2025R pump but they look very similar and the gasket (shim) is the same part number for both.

I never realized that the hydraulic pump for the 1-series and Gen-2 2-series attached to the rear of the transaxle. I assumed it bolted to the engine like the pump on my 2720. Then I looked at the Gen-2 2032R/2038R and saw that it looks like their pumps attach to the front of the transaxle and not the engine.

1023E / 1025R (Early serial numbers)



1023E / 1025R



2025R (Gen-2)



2025R (Gen-1)

 

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sounds like your going down the same road I am. I thought the steering pump was a separate pump. So the pressure regulator is in the manifold? Humm......guess I need to order the shop manual.
Nope, smallest tractor with dual pumps for steering and the rest of the functions is the Gen 1 2032r/2720. The 2025’s and 2520/2320’s didn’t have dual pumps.
 

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Discussion Starter #12
it will bolt up i have no doubt of that it uses the same gasket hose and hardware on both the 1025R and the 2025R , just not sure how much the extra volume will help
The 2025R pump is cheaper I may buy one if it will match up just to find out. I think the key here is the pressure switch which someone said was on the manifold. gonna get assembly drawings if the 2025r has a different hydrostatic tranny it may have a different mount. I was thinking it was on the engine not the Hy Tranny
 

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Discussion Starter #13
Nope, smallest tractor with dual pumps for steering and the rest of the functions is the Gen 1 2032r/2720. The 2025’s and 2520/2320’s didn’t have dual pumps.
I was told wrong by the dealer then which doesn't surprise me. Searching the net it appears to have one pump
thanks for the info
 

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The 2025R pump is cheaper I may buy one if it will match up just to find out. I think the key here is the pressure switch which someone said was on the manifold. gonna get assembly drawings if the 2025r has a different hydrostatic tranny it may have a different mount. I was thinking it was on the engine not the Hy Tranny
Check the illustrations I posted above. JD Parts clearly shows it bolted to the rear of the transaxle. What exactly are you trying to accomplish?
 
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Discussion Starter #15
You could be right. Below are the illustrations for the two pumps. Unfortunately they chose to show a front view for the 1-series pump and a rear view for the 2025R pump but they look very similar and the gasket (shim) is the same part number for both.

I never realized that the hydraulic pump for the 1-series and Gen-2 2-series attached to the rear of the transaxle. I assumed it bolted to the engine like the pump on my 2720. Then I looked at the Gen-2 2032R/2038R and saw that it looks like their pumps attach to the front of the transaxle and not the engine.

1023E / 1025R (Early serial numbers)



1023E / 1025R



2025R (Gen-2)



2025R (Gen-1)

I like you assumed it was on the motor like on my other two tractors and was surprised to see the drawing that indicated it was tranny mounted.
I think the drawings you posted are enough to tell that they both mount the same. The only difference I can see is in the specs for the pressure and volume. First I will try increasing the pressure to 2150 to see what that does. I suspect the pressure is limited to decrease lift capacity on the 1025r. But if the 1023 uses the same pump and JD lists its pressure the same as the 2025R then maybe it is the slight increase in volume that allows for greater lift capacity?
 

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Discussion Starter #16
Check the illustrations I posted above. JD Parts clearly shows it bolted to the rear of the transaxle. What exactly are you trying to accomplish?
I was just curious as to why the 2025r has a greater lift capacity than the 1025r when it appears to use the same basic pump and same pressure as the 1023. The stock 1025r will have all the capacity I will need in a teeny tiny tractor
 

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I was just curious as to why the 2025r has a greater lift capacity than the 1025r when it appears to use the same basic pump and same pressure as the 1023. The stock 1025r will have all the capacity I will need in a teeny tiny tractor
There is more to it than pressure. Both the loader geometry and cylinder diameter will have a direct effect on lift capacity that is independent of pressure alone.

Al
 

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There is more to it than pressure. Both the loader geometry and cylinder diameter will have a direct effect on lift capacity that is independent of pressure alone.

Al
Doesn't the 1025r and 2025r use the same 120 loader.:dunno:
 
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Tractordata.com says the 2025 uses H130.

Al
You have to use the drop down on the 2025R (as well as other models) where you can select the years. The new 2025R uses the 120R.
 
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