The John Deere 4420 tractor hydraulic pump flow is 21 GPM, and hydraulic system pressure is 2,900 psi.
Hydraulic pump flow21 GPM
Implement flow21 GPM
Total hydraulic flow21 GPM
Hydraulic pressure2,900 psi
Hydraulic system typeopen-center
Hydraulic fluid capacity66.6 qt (16.6 gal)
John Deere 4420 Hydraulic Flow Details
Hydraulic pump flow
21 GPM
Implement hydraulic flow
21 GPM
Total hydraulic flow
21 GPM
Hydraulic system pressure
2,900 psi
Hydraulic system type
open-center
Hydraulic fluid capacity
66.6 qt (16.6 gal)
Hydraulic Flow Comparison Chart
Hydraulic pump flow comparison
This model
21 GPM
Average
15.7 GPM
Low
5.1 GPM
High
57 GPM
Implement hydraulic flow comparison
This model
21 GPM
Average
14.9 GPM
Low
4.8 GPM
High
32 GPM
Total hydraulic flow comparison
This model
21 GPM
Average
15.4 GPM
Low
4.8 GPM
High
57 GPM
Hydraulic pressure comparison
This model
2,900 psi
Average
2,336.3 psi
Low
380 psi
High
3,625 psi
Hydraulic fluid capacity comparison
This model
16.6 gal
Average
9.9 gal
Low
0.7 gal
High
25.4 gal
John Deere 4420 Extra Hydraulic Notes
Hydraulic flow note
The John Deere 4420 should be matched to implements that fit its 21 GPM hydraulic-flow range.
Hydraulic pressure note
The John Deere 4420’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
Rear remotes / SCVs depend on the tractor’s hydraulic package and options.
For hydraulic implements, match the implement to the available hydraulic flow (21 GPM), not just the number of remotes.
Check the operator manual or hydraulic package because SCV count can change by year, market and trim package.
Hydraulic system type note
The John Deere 4420 uses a open-center hydraulic setup, so compatibility depends on both the attachment and valve configuration.
Hydraulic fluid capacity note
The John Deere 4420’s hydraulic fluid capacity is listed as 66.6 qt (16.6 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.
