Quick answer:
The John Deere 9120 tractor hydraulic pump flow is 35 GPM, and hydraulic system pressure is 2,900 psi.
Hydraulic pump flow35 GPM
Implement flow44 GPM
Total hydraulic flow44 GPM
Hydraulic pressure2,900 psi
Hydraulic system typeclosed-center
Hydraulic fluid capacity55 qt (13.8 gal)
John Deere 9120 Hydraulic Flow Details
| Hydraulic pump flow | 35 GPM |
|---|---|
| Implement hydraulic flow | 44 GPM |
| Total hydraulic flow | 44 GPM |
| Hydraulic system pressure | 2,900 psi |
| Hydraulic system type | closed-center |
| Hydraulic fluid capacity | 55 qt (13.8 gal) |
Hydraulic Flow Comparison Chart
Hydraulic pump flow comparison
Implement hydraulic flow comparison
Total hydraulic flow comparison
Hydraulic pressure comparison
Hydraulic fluid capacity comparison
John Deere 9120 Extra Hydraulic Notes
| Hydraulic flow note | For hydraulic work, the key number on the John Deere 9120 is 44 GPM implement flow; that points toward multiple SCVs, larger implements and heavier hydraulic demand. |
|---|---|
| Hydraulic pressure note | The John Deere 9120’s hydraulic pressure is listed at 2,900 psi, which is strong tractor hydraulic pressure; flow still decides attachment speed while pressure affects force. |
| Rear remotes / SCV note |
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| Hydraulic system type note | System type matters on the John Deere 9120: closed-center affects how hydraulic flow and pressure are delivered to valves and implements. |
| Hydraulic fluid capacity note | The John Deere 9120’s hydraulic fluid capacity is listed as 55 qt (13.8 gal); check the operator manual before servicing because capacity can change with transmission, hydraulic options and market. |
Official information note
Mistakes do happen. Hydraulic flow, pump flow, implement flow, pressure, rear remote / SCV setup and fluid capacity can change by year, market, transmission, pump option, loader package and hydraulic package. Please check the operator manual and official deere.com website for official information.

