| Manufacturer | AGCO Allis |
| Price | 35,000(USD) |
| Model | 6690 |
| Equipment Type | Utility Tractors |
| Factory | Italy |
OCED TRACTOR TEST 1080
| Description | Diesel 12-speed /5/1987/PTO performance/Drawbar performance |
| Power at rated engine speed | 80.85 hp/60.3 kW |
| Fuel use | 5.3 gal/hour/20.1 l/hour |
| Max power | 68.53 hp/51.1 kW |
AGCO ALLIS 6690 POWER
| Engine | 86.91 hp/64.8 kW |
| PTO (claimed) | 80.88 hp/60.3 kW |
| Drawbar (tested) | 68.53 hp/51.1 kW |
| PTO (tested) | 80.85 hp/60.3 kW |
ENGINE DETAIL
The AGCO Allis 6690 tractor features a turbocharged 4-cylinder diesel engine with a displacement of 4.0 L, delivering 86.91 hp at a rated RPM of 2500, which is ideal for moderate agricultural applications requiring consistent power. Its dry element air cleaner and thermostart pre-heating system enhance engine reliability, especially in colder conditions. However, with an oil capacity of 9.2 quarts, ensuring regular maintenance and timely oil changes is crucial to optimize performance and prolong engine life.
| Description | SLH 1000.4-AT/turbocharged diesel/4-cylinder/air-cooled |
| Displacement | 244 ci/4.0 L |
| Bore/Stroke | 4.13x4.55 inches/105 x 116 mm |
| Power | 86.91 hp/64.8 kW |
| Air cleaner | dry element |
| Pre-heating | thermostart |
| Rated RPM | 2500 |
| Idle RPM | 650-2710 |
| Starter volts | 12 |
| Oil capacity | 9.2 qts/8.7 L |
AGCO ALLIS 6690 ENGINE
The AGCO Allis 6690 is powered by a SLH 4.0L 4-cylinder diesel engine, which delivers a balance of torque and fuel efficiency, making it suitable for medium-duty agricultural tasks. Its compact design enhances maneuverability in tight spaces, although the power output may limit performance in heavy-load applications. Consider this tractor for versatility on moderate-sized farms, where efficiency and ease of use are prioritized.
| Description | SLH 4.0L 4-cyl diesel |
TRANSMISSIONS OVERVIEW
The AGCO Allis 6690 features a versatile transmission system, offering a 12-speed synchromesh or optional 24-speed, 16-speed, and 30-speed partial power shift configurations, enhancing operational flexibility for various tasks. This allows for smooth gear transitions, improving efficiency during fieldwork and transport. However, the complexity of a multi-speed transmission may require more maintenance and operator familiarity to optimize performance in specific scenarios, such as heavy tillage versus light draft work.
| Description | 12-speed synchromesh/24-speed/16-speed/30-speed partial power shift |
TRANSMISSION 1
The AGCO Allis 6690 features a synchromesh transmission with 12 forward and reverse gears, ensuring smooth shifting for optimal power delivery. Its 305mm dry disc clutch can handle the demands of various field operations, while the 61 qt (57.7 L) oil capacity facilitates extended intervals between maintenance. This setup is advantageous for tasks requiring precise speed control, but operators should be mindful of the dry clutch's potential wear under heavy load conditions.
| Type | synchromesh |
| Gears | 12 forward and reverse |
| Clutch | 305mm dry disc |
| Oil capacity | 61 qts/57.7 L |
| Description | Four synchronized gears in three ranges. |
SPEEDS
| Description | With 16.9R34 rear tires. |
TRANSMISSION 2
The AGCO Allis 6690 features a 24 forward and 12 reverse gear configuration, offering a wide range of speed and torque options for enhanced operational flexibility in various agricultural tasks. This extensive gear selection allows for optimal performance in diverse field conditions, but may require skilled operators to effectively manage gear usage. Scenarios such as tilling in heavy soil or transporting loads can benefit significantly from this versatility, ensuring efficient power delivery when needed.
| Gears | 24 forward and 12 reverse |
TRANSMISSION 3
The AGCO Allis 6690 tractor features a 16-forward and reverse gear transmission, allowing for versatile speed control and enhanced maneuverability in various agricultural applications. This extensive gear range can improve efficiency during fieldwork, especially in diverse terrain and conditions. However, the complexity of the transmission may present a steeper learning curve for operators unfamiliar with multi-speed gear systems.
| Gears | 16 forward and reverse |
TRANSMISSION 4
The AGCO Allis 6690's partial power shift transmission offers 30 forward and reverse gears across five gears in three ranges (low, medium, high), allowing for precise control and adaptability in various field conditions. Advantages include enhanced torque management and efficiency during operation, making it suitable for both heavy-duty tasks and transport. However, the complexity of the transmission may pose a challenge in terms of maintenance and operator learning curve, necessitating skilled handling to optimize performance.
| Type | partial power shift |
| Gears | 30 forward and reverse |
| Description | Five gears (1-5) in three ranges (L/M/H) with high-low power shift. |
MECHANICAL
The AGCO Allis 6690 tractor features a versatile 4x2 2WD or optional 4x4 MFWD, providing excellent traction, especially on uneven terrain. Its hydrostatic power steering offers easy maneuverability, while the hydraulic wet disc brakes enhance stopping power in demanding conditions. The range of transmission options, including a 30-speed partial power shift, allows for efficient speed management across various applications, making it suitable for both field operations and transport tasks.
| Chassis | 4x2 2WD/4x4 MFWD 4WD (optional) |
| Steering | hydrostatic power |
| Brakes | hydrualic wet disc |
| Cab | Flat-deck with four-post ROPS. Cab optional with air-conditioning. |
| Transmissions | 12-speed synchromesh/24-speed/16-speed/30-speed partial power shift |
CAPACITY
| Fuel | 28.27 gal/107.0 L |
| Hydraulic system | 15.2 gal/57.5 L |
HYDRAULICS
| Type | open center |
| Capacity | 15.2 gal/57.5 L |
| Valves | 2 |
| Pump flow | 11.23 gpm/42.5 lpm |
TRACTOR HITCH
| Rear Type | II/I |
| Control | position and draft control with lower-link sensing |
| Rear lift (at ends) | 6,790 lbs/3079 kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | 124.5mm hydraulic wet disc |
| Rear RPM | 540/1000 (1.375) |
| Engine RPM | 540@2200/1000@2450 |
AGCO ALLIS 6690 TIRES
The AGCO Allis 6690 tractor features versatile tire options, with standard agricultural front tires (7.50-18 for 2WD or 14.9R24 for 4WD) paired with robust 16.9R34 rear tires, optimizing traction and stability. The 2WD configuration offers lower operational costs and ease of maintenance, while the 4WD variant enhances maneuverability in challenging terrain. Ideal for mid-sized farms, the chosen tire setup will impact soil compaction levels and overall field performance, necessitating careful selection based on application needs.
| Standard tires (ag) | Front: 7.50-18. Rear: 16.9R34 (2WD)/Front: 14.9R24. Rear: 16.9R34 (4WD) |
DIMENSIONS
| 2WD Wheelbase | 96.4 inches/244 cm |
| 4WD Wheelbase | 92.8 inches/235 cm |
| Length | 161 inches/408 cm |
| Width | 82.4 inches/209 cm |
| Height | 111.2 inches/282 cm |
| Ground clearance | 17.6 inches/44 cm |
| Rear axle | Flange |
AGCO ALLIS 6690 WEIGHT
| 2WD Shipping | 6,724 lbs/3050 kg |
| 4WD Shipping | 7,385 lbs/3349 kg |
| 2WD Max capacity | 11,464 lbs/5200 kg |
| 4WD Max capacity | 12,015 lbs/5450 kg |
DIMENSIONS & TIRES
The AGCO Allis 6690 tractor offers a robust 2WD configuration with a wheelbase of 96.4 inches, enhancing stability during heavy-load operations, while the 4WD option (92.8 inches) provides superior traction in varied terrain, beneficial for tillage or maneuvering in wet conditions. Weighing between 6,724 to 7,385 pounds, the tractor delivers a solid presence, but operators should consider the weight for road transport and potential field compaction. The front tire width of 7.50-18 and rear tire dimensions of 16.9R34 allow for effective ground coverage, yet tire selection may impact efficiency based on soil conditions and intended tasks.
| 2WD Wheelbase | 96.4 inches/244 cm |
| 4WD Wheelbase | 92.8 inches/235 cm |
| Weight | 6724 to 7385 pounds |
| Front tire | 7.50-18 |
| Rear tire | 16.9R34 (2WD) |
6690 SERIAL NUMBERS
| Location | Console, right side |
| 1991 | 1001 |
| 1992 | 1427 |
| 1993 | 1506 |
| 1994 | 1669 |
| 1995 | 1888 |
| 1996 | 2010 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 55 |
| Battery volts | 12 |
| Battery AH | 100 |