| Manufacturer | New Holland |
| Price | 33,400(USD) |
| Model | 6640 |
| Equipment Type | Utility Tractors |
| Factory | Basildon, England |
VARIANTS
| 6640S | 8-speed economy |
| 6640SL | 12-speed |
| 6640SLE | 16-speed premium |
OCED TRACTOR TEST 1657 2
| Description | Diesel 16x4 4WD April 24 - May 11, 1992 Link: OCED Tractor Test 1657 file PTO performance Drawbar performance Gear 5-Low used for power test Gear 2H used for pull test |
| Max power | 67.18hp / 50.1kW |
| Fuel use | 4.7gal/hour / 17.8l/hour |
| Power at rated engine speed | 76.75hp / 57.2kW |
| Power at rated PTO speed | 75.63hp / 56.4kW |
| Max pull | 10,512lbs / 4768kg |
NEW HOLLAND 6640 POWER
| Engine (gross) | 90.7hp / 67.6kW |
| Engine (net) | 85hp / 63.4kW |
| PTO (claimed) | 76hp / 56.7kW |
| Drawbar (tested) | 67.18hp / 50.1kW |
| PTO (tested) | 77.13hp / 57.5kW |
ENGINE DETAIL
The New Holland 6640 is powered by a robust Ford Genesis 5.0L diesel engine, delivering a gross output of 90.7hp and a peak torque of 337lb-ft at 1200 RPM, making it suitable for heavy-duty tasks that require strong pulling power. Its high compression ratio of 17.5:1 contributes to fuel efficiency but may also lead to increased thermal stress, necessitating proper cooling with a substantial coolant capacity of 15.3 qts (16.9 qts with cab). Note the engine's dual paper element air cleaner and precise valve clearances ( intake: 0.016 in, exhaust: 0.019 in) for optimal performance and maintenance ease.
| Description | Ford Genesis diesel 4-cylinder 8-valve liquid-cooled |
| Displacement | 304ci / 5.0L |
| Bore/Stroke | 4.40x5.00inches / 112x 127mm |
| Power (gross) | 90.7hp / 67.6kW |
| Air cleaner | dual paper elements |
| Compression | 17.5:1 |
| Rated RPM | 2200 |
| Idle RPM | 725-2375 |
| Torque | 337lb-ft / 457.0Nm |
| Torque RPM | 1200 |
| Firing order | 1-3-4-2 |
| Starter volts | 12 |
| Coolant capacity | 15.3qts / 14.5L 16.9qts / 16.0L *With cab |
| Intake valve clearance | 0.016inches / 0.406mm (cold) |
| Exhaust valve clearance | 0.019inches / 0.483mm (cold) |
ENGINE OIL
The New Holland 6640 has an oil capacity of 12.1 quarts (11.5 liters), which is relatively manageable for routine maintenance but requires careful monitoring to prevent engine wear. Utilizing high-quality oil can enhance engine longevity and performance, especially under heavy-duty conditions. Ensure regular oil checks and changes to maintain optimal lubrication and operational efficiency.
| Oil capacity | 12.1qts / 11.5L |
NEW HOLLAND 6640 ENGINE
The New Holland 6640 tractor is powered by a Ford 5.0L 4-cylinder diesel engine, providing a robust balance between power output and fuel efficiency. The fuel tank options—25 gallons for standard, 52.7 gallons with ROPS, and 46.9 gallons with a cab—allow for versatility in operation; larger tanks extend runtime for heavier tasks but may increase vehicle weight. Consider the intended usage; for extensive fieldwork, opting for the larger tank might enhance productivity while reducing refueling stops.
| Description | Ford 5.0L 4-cyl diesel |
| Fuel tank | 25gal / 94.6L 52.7gal / 199.5L (ROPS optional) 46.9gal / 177.5L (cab optional) |
TRANSMISSIONS OVERVIEW
The New Holland 6640 features a versatile transmission system, offering options such as 8-speed constant mesh, 12-speed synchronized, and both 16-speed power shift configurations. The advantages of a power shift transmission include smoother shifting under load and enhanced operator comfort, while synchronized gears allow for easier manual operation and control. However, the complexity of these systems may result in increased maintenance requirements and potential repair costs, especially under heavy usage scenarios.
| Description | 8-speed constant mesh 16-speed two-speed power shift 12-speed synchronized 16-speed four-speed power shift |
TRANSMISSION 1
The New Holland 6640 tractor features an EconoShift constant mesh transmission, offering 8 forward and 2 reverse gears, ideal for versatility in various agricultural tasks. The need to stop and engage the clutch for shifting can be seen as a limitation, particularly in high-productivity scenarios requiring frequent gear changes. With an oil capacity of 69.6 quarts, regular maintenance is essential for optimal performance, particularly given its dry disc clutch system, which requires proper lubrication to avoid wear.
| Transmission | EconoShift |
| Type | constant mesh |
| Gears | 8 forward and 2 reverse |
| Clutch | dry disc |
| Oil capacity | 69.6qts / 65.9L |
| Description | Four gears (1-4), plus reverse, in two ranges (L/H). Optional creeper provided a third range. Tractor must be stopped and clutch used to shift gears or range. The eight-speed transmission was only used on the 6640S |
SPEEDS 1
| Description | With 16.9-34 rear tires |
TRANSMISSION 2
The New Holland 6640 tractor features a two-speed power shift transmission, providing 16 forward and 4 reverse gears, optimizing flexibility for varied tasks. The Dual Power system enhances operational efficiency by allowing seamless shifts between direct drive and lower ranges, which is beneficial in challenging terrains or when greater torque is needed. However, the dry disc clutch may require more maintenance and can be less forgiving in heavy-duty applications compared to wet clutches.
| Transmission | Dual Power |
| Type | two-speed power shift |
| Gears | 16 forward and 4 reverse |
| Clutch | dry disc |
| Oil capacity | 69.6qts / 65.9L |
| Description | Dual Power adds a two-speed power shift between direct drive and the lower Dual Power range to the basic eight-speed transmission. The Dual Power range is engaged by a switch on the dashboard. Dual Power was an option on the 6640S |
SPEEDS 2
| Description | With 16.9-34 rear tires |
TRANSMISSION 3
The New Holland 6640 features a SynchroShift transmission with 12 synchronized gears in forward and reverse, enhancing operational efficiency and ease of use during load changes. While shifts between medium and high ranges are seamless, stopping is required to shift into low range, which may impact productivity in time-sensitive scenarios. The optional dual power upgrade allows for a 24-speed transmission, offering greater versatility for varied field conditions, ultimately improving adaptability and performance.
| Transmission | SynchroShift |
| Type | synchronized |
| Gears | 12 forward and reverse |
| Clutch | dry disc |
| Description | Four gears (1-4) in three ranges (L/M/H) with right-hand shuttle lever. Gear shifts are synchronized. Shifts between medium and high ranges are synchronized, but the tractor should be stopped to shift to or from low range. Synchronized shuttle shifting. The 12-speed SynchroShift was standard on the 6640 SL. Dual power was an option with the SynchroShift, turning it into a 24-speed transmission |
SPEEDS 3
| Description | With 16.9-38 rear tires |
TRANSMISSION 4
The New Holland 6640 tractor features an advanced ElectroShift/Pulse Command transmission with 16 forward and reverse gears, enhancing operational flexibility across various field conditions. Its wet disc clutch provides smooth engagement and reduces wear, although the requirement for clutch use when shifting ratios can pose challenges in certain applications. The push-button power shifting and de-clutching functions allow for efficient gear changes, making it ideal for tasks requiring frequent speed adjustments, such as loader work or crop cultivation.
| Transmission | ElectroShift/Pulse Command |
| Type | four-speed power shift |
| Gears | 16 forward and reverse |
| Clutch | wet disc |
| Oil capacity | 64qts / 60.6L |
| Description | Four power shift gears arranged in two synchronized ratio groups (1-4 and 5-8). Two synchronized ranges (low/high) and right-hand shuttle. Clutch must be used to shift range or move between the lower (1-4) and higher (5-8) gear ratio groups. Push-button power shifting between the four gears in a ratio group. Push-button de-clutching on the shuttle lever allow shifting without the foot clutch. The 16 power shift was standard on the 6640 SLE |
SPEEDS 4
| Description | With 16.9-38 rear tires |
MECHANICAL
The New Holland 6640 tractor features both 2WD and optional 4WD configurations, providing flexibility for various terrain conditions. Notably, the mechanical and electro-hydraulic differential lock options enhance traction, while the hydrostatic power steering improves maneuverability. The choice between 8-speed and 16-speed transmissions allows for tailored performance, suitable for both heavy-duty applications and efficient transport scenarios, especially beneficial in diverse agricultural practices.
| 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 | 18.2gpm / 68.9lpm 21gpm / 79.5lpm (SLE) |
| Steering press. | 2100psi / 144.8bar |
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 | 4,200lbs / 1905kg 4,439lbs / 2013kg (optional)/6,210lbs / 2816kg (SLE)/6,564lbs / 2977kg (SLE optional) |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/540/1000 (optional) |
NEW HOLLAND 6640 TIRES
The New Holland 6640 tractor, equipped with Ag front tires (7.50-16) and Ag rear tires (16.9-30), offers a balanced weight distribution ideal for various agricultural applications. The rear tire size enhances traction and stability during field operations, while the front tires contribute to maneuverability, especially in tighter spots. A potential challenge may arise in muddy conditions, where the front tire size may limit flotation compared to larger front alternatives.
| Ag front | 7.50-16 |
| Ag rear | 16.9-30 |
DIMENSIONS
| Wheelbase | 93inches / 236cm |
| Length | 162inches / 411cm |
| 2WD Width | 77inches / 195cm |
| 4WD Width | 80inches / 203cm |
| 2WD Clearance (front axle) | 22inches / 55cm |
| 4WD Clearance (front axle) | 20inches / 50cm |
NEW HOLLAND 6640 WEIGHT
| 2WD ROPS Shipping | 7,099lbs / 3220kg |
| 4WD ROPS Shipping | 8,091lbs / 3670kg |
| 2WD Cab Shipping | 8,129lbs / 3687kg |
| 4WD Cab Shipping | 9,121lbs / 4137kg |
| Operating | 8,135lbs / 3690kg (4WD ROPS) |
| Ballasted | 10,368lbs / 4702kg |
NEW HOLLAND 6640 HEIGHT
| Hood | 67inches / 170cm |
| Cab | 107inches / 271cm |
| Exhaust | 112inches / 284cm |
DIMENSIONS & TIRES
The New Holland 6640 tractor, with a wheelbase of 93 inches (236 cm), offers stability and maneuverability in tight working conditions, making it suitable for both field and yard applications. Its weight range of 7099 to 9121 pounds provides sufficient ballast for traction, particularly useful in tasks involving heavy implements. However, users should be mindful of tire specifications; the front 7.50-16 and rear 16.9-30 sizes may impact its performance in varied terrain, particularly in terms of compaction and flotation in soft soil conditions.
| Wheelbase | 93inches / 236cm |
| Weight | 7099 to 9121 pounds |
| Front tire | 7.50-16 |
| Rear tire | 16.9-30 |
FORD 7411 LOADER
| Height (to pin) | 134inches / 340cm |
| Clearance, dumped bucket | 99inches / 251cm |
| Dump reach | 48inches / 121cm |
| Breakout force (lift) | 5265lbs / 2388kg |
| Lift to full height (at pin) | 3050lbs / 1383kg |
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 |