The New Holland 6640 tractor hydraulic oil capacity was not listed in the scraped specs, but hydraulic pump flow is 18.2 gpm | 68.9 lpm, hydraulic type is open center (S/SL), and valves/remotes are listed as 1 to 4.
New Holland 6640 Hydraulic Capacity & Flow Specs
| Hydraulic type | open center (S/SL) |
|---|---|
| Pump flow | 18.2 gpm | 68.9 lpm |
| Hydraulic valves | 1 to 4 |
New Holland 6640 Hitch, Remote & Lift Specs
| Rear hitch type | II |
|---|---|
| Rear lift at 24 inches | 4200 lbs | 1905 kg |
New Holland 6640 Useful Hydraulic Calculations
| Rear lift per pump gpm | 230.8 lb per gpm |
|---|
New Holland 6640 Hydraulic Comparison Charts
Pump flow comparison
Rear lift comparison
Benchmarks use practical low, average and high ranges for the utility and row-crop tractor category. These are comparison guides only; use the operator manual and exact tractor configuration before buying parts, oil, loaders or hydraulic implements.
New Holland 6640 Steering, Brakes & Mechanical Hydraulic Notes
| Steering | Power steering |
|---|---|
| Brakes | mechanical (S) |
| Differential lock | mechanical (S) |
New Holland 6640 Hydraulic Capacity FAQ
Why is the New Holland 6640 hydraulic oil capacity not shown here?
The scraped specs do not list a hydraulic oil capacity for the New Holland 6640, but pump flow is 18.2 gpm | 68.9 lpm, system type is open center (S/SL), and lift is listed as 4200 lbs | 1905 kg. For oil fill amount, use the manual or fill/check procedure, not pump flow or pressure.
Will the New Holland 6640 hydraulics feel fast or slow?
The useful speed clue is 18.2 gpm | 68.9 lpm pump flow, above the 14 gpm benchmark for this group. That is the spec that helps loader cycle speed, remote response and hydraulic implement speed.
What matters most for loader speed on the New Holland 6640?
On the New Holland 6640, 18.2 gpm | 68.9 lpm pump flow points to quicker loader and cylinder movement and 4,200 lb listed lift is the number to watch for implement weight. Flow is the speed number; pressure and lift are the force numbers.
How do you judge hydraulic implement fit on the New Holland 6640?
For implement matching, the useful checks are 18.2 gpm flow, 4,200 lb listed lift, 1 to 4 remote/valve listing, and II hitch. That combination is fast enough on paper for quicker cylinder movement than many tractors in this size group and best kept realistic on heavy rear implements, so match the implement by hydraulic demand, hitch category and actual tractor setup rather than model name alone.
Is the New Holland 6640 rear lift capacity strong?
The listed lift figure is 4200 lbs | 1905 kg, below the 7,000 lb benchmark. Keep rear implements realistic and pay attention to weight carried behind the lift points.
Are the New Holland 6640 hydraulic remotes enough?
The New Holland 6640 remote/valve listing is 1 to 4. Because that wording may be optional or configuration-dependent, treat it as a setup check before buying an implement that needs rear hydraulic outlets.
Will the New Holland 6640 hydraulics handle long hydraulic jobs?
The useful heat clues are 18.2 gpm flow. Heat risk still depends on load, duty cycle, oil level, cooler condition and implement demand.
What do the New Holland 6640 hitch hydraulic specs mean?
The hitch-side hydraulic clues are that rear hitch type is II and listed lift is 4200 lbs | 1905 kg. For real implement choice, hitch category gets it connected, lift capacity gets it raised, and hydraulic flow gets cylinders moving at a usable speed.
What hydraulic system does the New Holland 6640 use?
The hydraulic system is listed as open center (S/SL) with 18.2 gpm | 68.9 lpm pump flow. The system type tells you how the hydraulics are arranged; the flow and pressure numbers tell you more about real-world speed and force.
What should you check before servicing the New Holland 6640 hydraulics?
For service planning, the system is listed as open center (S/SL) and flow is listed at 18.2 gpm. Use the dipstick or sight glass and the operator manual as the final source before servicing.
Hydraulic capacity, pressure, flow, valves, remotes and lift specs can vary by year, market, transmission, pump option, loader package and tractor configuration. Check the operator manual, hydraulic oil dipstick/sight glass, parts book and official newholland.com website before buying hydraulic oil, servicing the system or sizing hydraulic implements.
