AGCO Allis 6690 - Horsepower, Weight, Specs, Problems, Price & More
The AGCO Allis 6690 tractor is powered by a SLH 4.0L 4-cyl diesel engine that provides 86.91 hp/64.8 kW of horsepower. It has a 4x2 2WD/4x4 MFWD 4WD (optional) drive configuration and a 12-speed synchromesh/24-speed/16-speed/30-speed partial power shift transmission.
Engine
The engine is a SLH 1000.4-AT/turbocharged diesel/4-cylinder/air-cooled with a displacement of 244 ci/4.0 L and bore/stroke of 4.13x4.55 inches/105 x 116 mm. It has a power output of 86.91 hp/64.8 kW and a dry element air cleaner. The engine is equipped with thermostart pre-heating and has a rated RPM of 2500. The starter volts are 12 and the oil capacity is 9.2 qts/8.7 L.
Transmission
The transmission is a 12-speed synchromesh/24-speed/16-speed/30-speed partial power shift. It has an engine power output of 86.91 hp/64.8 kW and a PTO (claimed) power output of 80.88 hp/60.3 kW. The drawbar (tested) power output is 68.53 hp/51.1 kW and the PTO (tested) power output is 80.85 hp/60.3 kW. The transmission is reliable and provides smooth gear changes. It is easy to operate and maintain. The transmission is suitable for a wide range of applications.
Brakes
The brakes are hydraulic wet disc. The SLH 1000.4-AT/turbocharged diesel/4-cylinder/air-cooled engine provides a power output of 86.91 hp/64.8 kW. The brakes are reliable and provide excellent stopping power. The air-cooled engine ensures that the brakes do not overheat during prolonged use. The brakes are easy to maintain and provide consistent performance. The oil capacity of the engine is 9.2 qts/8.7 L.
Steering
The steering is hydrostatic power. The SLH 4.0L 4-cylinder diesel engine provides a power output of 86.91 hp/64.8 kW. The steering is responsive and provides excellent control. It is easy to operate and maintain. The steering is suitable for a wide range of applications.
Common Problems
Users have reported issues with the cab air-conditioning system. Some users have also reported issues with the transmission, particularly with the synchromesh gears. The hydraulic system has also been known to develop leaks. The brakes may require frequent adjustment to maintain optimal performance. The engine may require regular maintenance to prevent overheating.
What Users Like
Users appreciate the versatility of the AGCO Allis 6690, which is suitable for a wide range of applications. The transmission is reliable and provides smooth gear changes. The steering is responsive and provides excellent control. The brakes are reliable and provide excellent stopping power. Users also appreciate the comfortable cab with four-post ROPS and optional air-conditioning.
AGCO Allis 6690 Technical Specifications
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 | |
| 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 |
Engine | |
| Description | SLH 4.0L 4-cyl diesel |
Mechanical | |
| 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 |
Tires | |
| 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 |
Dimensions And Tires | |
| 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) |
Serial Numbers | |
| Location | Console, right side |
| 1991 | 1001 |
| 1992 | 1427 |
| 1993 | 1506 |
| 1994 | 1669 |
| 1995 | 1888 |
| 1996 | 2010 |
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 |
Electrical | |
| Ground | negative |
| Charging System | alternator |
| Charging Amps | 55 |
| Battery Volts | 12 |
| Battery Ah | 100 |
Speeds | |
| Description | With 16.9R34 rear tires. |
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 |
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 |