The John Deere Z994R tractor hydraulic pump flow is 21 GPM, and hydraulic system pressure is 380 psi.
Hydraulic pump flow21 GPM
Implement flow21 GPM
Total hydraulic flow19.8 GPM
Hydraulic pressure380 psi
Hydraulic system typeopen-center
Hydraulic fluid capacity12.8 qt (3.2 gal)
John Deere Z994R Hydraulic Flow Details
Hydraulic pump flow
21 GPM
Implement hydraulic flow
21 GPM
Total hydraulic flow
19.8 GPM
Hydraulic system pressure
380 psi
Hydraulic system type
open-center
Hydraulic fluid capacity
12.8 qt (3.2 gal)
Hydraulic Flow Comparison Chart
Hydraulic pump flow comparison
This model
21 GPM
Average
13.4 GPM
Low
0.9 GPM
High
85 GPM
Implement hydraulic flow comparison
This model
21 GPM
Average
11.1 GPM
Low
0.9 GPM
High
78 GPM
Total hydraulic flow comparison
This model
19.8 GPM
Average
13 GPM
Low
0.9 GPM
High
78 GPM
Hydraulic pressure comparison
This model
380 psi
Average
1,813.3 psi
Low
300 psi
High
3,000 psi
Hydraulic fluid capacity comparison
This model
3.2 gal
Average
3.6 gal
Low
0.5 gal
High
60 gal
John Deere Z994R Extra Hydraulic Notes
Hydraulic flow note
The John Deere Z994R should be matched to implements that fit its 21 GPM hydraulic-flow range.
Hydraulic pressure note
The John Deere Z994R’s hydraulic pressure is listed at 380 psi, which is lower-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 Z994R uses a open-center hydraulic setup, so compatibility depends on both the attachment and valve configuration.
Hydraulic fluid capacity note
The John Deere Z994R’s hydraulic fluid capacity is listed as 12.8 qt (3.2 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.
