Overview
The Renault 681S is a utility farm tractor produced from 1980 to 1986, featuring a 68 hp MWM 3.8L four-cylinder diesel engine. Available in two-wheel and four-wheel drive configurations, the model utilizes a 12-speed mechanical shuttle transmission and offers both ROPS and cab options. Key specifications include a Category II rear hitch with an 8,489-pound lift capacity and an independent rear PTO with 540/1000 RPM capabilities.
Ideal Applications
Transmission Configuration:
The tractor is equipped with a 12-speed mechanical shuttle transmission providing 12 forward and 12 reverse gears, where reverse speeds are documented as 3% slower than forward speeds.
Engine and Torque Performance:
The liquid-cooled MWM D227-4 diesel engine is rated at 68 hp at 2350 RPM and generates 169.6 lb-ft of torque at 1500 RPM with a 17.8:1 compression ratio.
Hydraulic and Hitch Capacity:
The 681S features an open center hydraulic system with a 2611 psi pressure rating and an 8.0 gpm flow rate to support a Category II hitch rated for 8,489 lbs of rear lift.
Production
| Description | Utility tractor |
|---|---|
| Manufacturer | Renault |
Engine
| Engine type | MWM 3.8L 4-cyl diesel |
|---|---|
| Fuel tank | 21.7 gal (82.1 L) |
| Bore/Stroke | 3.875x4.724 inches (98 x 120 mm) |
| Compression | 17.8:1 |
| Description | MWM D227-4 / diesel / 4-cylinder / liquid-cooled |
| Displacement | 230 ci (3.8 L) |
| Power | 68 hp (50.7 kW) |
| Rated RPM | 2350 |
| Starter volts | 12 |
| Torque | 169.6 lb-ft (230.0 Nm) |
| Torque RPM | 1500 |
Transmission
| Clutch | dry disc |
|---|---|
| Description | Four gears in three ranges with shuttle. |
| Gears | 12 forward and reverse |
| Transmission type | 12-speed mechanical shuttle |
| Type | mechanical shuttle |
Mechanical
| Cab | ROPS. Cab optional. |
|---|---|
| Description | Power steering / Dry disc brakes |
| Drive type | Two- or four-wheel drive |
Hydraulics
| Pressure | 2611 psi (180.0 bar) |
|---|---|
| Total flow | 8.0 gpm (30.3 lpm) |
| Type | open center |
Hitch
| Rear lift | 8489 lbs (3850 kg) |
|---|---|
| Rear Type | II |
PTO
| Engine RPM | 551@2350 |
|---|---|
| Rear PTO | independent |
| Rear PTO Type | 540/1000 (1.375) |
Electrical
| Battery AH | 80 |
|---|---|
| Battery volts | 12 |
| Charging amps | 35 |
| Charging system | alternator |
Dimensions & Tires
| 2WD Front tread | 51.2 to 74.8 inches (130 to 189 cm) |
|---|---|
| 2WD Length | 150 inches (381 cm) |
| 2WD Wheelbase | 93.3 inches (236 cm) |
| 4WD Front tread | 53.2 to 74.8 inches (135 to 189 cm) |
| 4WD Length | 156.3 inches (397 cm) |
| 4WD Wheelbase | 94.9 inches (241 cm) |
| Height (cab) | 96.1 inches (244 cm) |
| Height (steering wheel) | 64.2 inches (163 cm) |
| Rear tread | 51.2 to 78.8 inches (130 to 200 cm) |
| Width | 64.6 inches*Minimum width. (164 cm) |
| 2WD Rear tire | 16.9-30 |
| 2WD Wheelbase | 93.3 inches (236 cm) |
| 4WD Wheelbase | 94.9 inches (241 cm) |
| Front tire | 7.50-18 |
| Weight | 5765 to 7926 pounds |
| 2WD Standard tires (ag) | Front: 7.50-18. Rear: 16.9-30 |
| 4WD Optional tires (ag) | Front: 9.5-28. Rear: 13.6-36 / Front: 11.2-28. Rear: 13.6-36 / Front: 13.6-24. Rear: 16.9-34 / Front: 11.2-28. Rear: 13.6-38 |
| 4WD Standard tires (ag) | Front: 11.2-24. Rear: 16.9-30 |
References
| Description | Renault Serie S |
|---|
Renault 681S Weight
| 2WD Cab | 6504 lbs (2950 kg) |
|---|---|
| 2WD ROPS | 5765 lbs (2615 kg) |
| 4WD Cab | 7926 lbs (3595 kg) |
| 4WD ROPS | 7187 lbs (3260 kg) |
Speeds
| Description | With 16.9-30 rear tires. Reverse speeds are 3% slower than forward. |
|---|