Production | |
| Manufacturer: | New Holland |
| Type: | Utility tractor |
| Factory: | Basildon, England |
| Original price: | $33,400 (1998) |
Variants | |
| 6640S: | 8-speed economy |
| 6640SL: | 12-speed |
| 6640SLE: | 16-speed premium |
New Holland 6640 Power | |
| Engine (gross): | 90.7 hp 67.6 kW |
| Engine (net): | 85 hp 63.4 kW |
| PTO (claimed): | 76 hp 56.7 kW |
| Drawbar (tested): | 67.18 hp 50.1 kW |
| PTO (tested): | 77.13 hp 57.5 kW |
Mechanical | |
| Chassis: | 4x2 2WD |
| 4x4 MFWD 4WD (optional) | |
| Final drives: | inboard planetary |
| Differential lock: | mechanical (S) |
| electro-hydraulic (SL/SLE) | |
| Steering: | hydrostatic power |
| Brakes: | mechanical (S) |
| hydraulic wet disc (SL/SLE) | |
| Cab: | Two-post foldable ROPS. Straddle-mount (6640 S) or raised deck (SL/SLE). Comfort Command Cab optional with air-conditioning (SL/SLE). |
| Transmissions: | 8-speed constant mesh |
| 16-speed two-speed power shift | |
| 12-speed synchronized | |
| 16-speed four-speed power shift | |
Hydraulics | |
| Type: | open center (S/SL) |
| closed center load sensing (SLE) | |
| Valves: | 1 to 4 |
| Pump flow: | 18.2 gpm 68.9 lpm |
| 21 gpm 79.5 lpm (SLE) | |
| Steering press.: | 2100 psi 144.8 bar |
Tractor hitch | |
| Rear Type: | II |
| Control: | Position control and top-link draft sensing. Electronic lower-link sensing optional on 6640 SLE. |
| Rear lift (at 24"/610mm): | 4,200 lbs 1905 kg |
| 4,439 lbs 2013 kg (optional) | |
| 6,210 lbs 2816 kg (SLE) | |
| 6,564 lbs 2977 kg (SLE optional) | |
Power Take-off (PTO) | |
| Rear PTO: | independent |
| Rear RPM: | 540 |
| 540/1000 (optional) | |
6640 Serial Numbers | |
| Location: | Data plate inside hood. |
| 1991: | BC68791 |
| 1992: | BD02865 |
| 1993: | BD35935 |
| 1994: | BD65544 |
| 1995: | BD98440 |
| 1996: | 021630B |
| 1997: | 056502B |
| 1998: | 083503B |
Electrical | |
| Ground: | negative |
| Charging system: | alternator |
| Charging amps: | 55 (ROPS) |
| 100 (cab) | |
| Batteries: | 1 (ROPS) |
| 2 (cab) | |
| Battery CCA: | 800 |
| Battery volts: | 12 |
Engine Detail | |
| Ford Genesis | |
| diesel | |
| 4-cylinder 8-valve | |
| liquid-cooled | |
| Displacement: | 304 ci 5.0 L |
| Bore/Stroke: | 4.40x5.00 inches 112 x 127 mm |
| Power (gross): | 90.7 hp 67.6 kW |
| Air cleaner: | dual paper elements |
| Compression: | 17.5:1 |
| Rated RPM: | 2200 |
| Idle RPM: | 725-2375 |
| Torque: | 337 lb-ft 457.0 Nm |
| Torque RPM: | 1200 |
| Firing order: | 1-3-4-2 |
| Starter volts: | 12 |
| Coolant capacity: | 15.3 qts 14.5 L |
| 16.9 qts 16.0 L *With cab | |
| Intake valve clearance: | 0.016 inches 0.406 mm (cold) |
| Exhaust valve clearance: | 0.019 inches 0.483 mm (cold) |
Dimensions | |
| Wheelbase: | 93 inches 236 cm |
| Length: | 162 inches 411 cm |
| 2WD Width: | 77 inches 195 cm |
| 4WD Width: | 80 inches 203 cm |
| 2WD Clearance (front axle): | 22 inches 55 cm |
| 4WD Clearance (front axle): | 20 inches 50 cm |