Ford 661
| | 1957 - 1961 |
| 601 Workmaster Series | | Utility tractor |
|
| Production |
| Manufacturer | Ford
|
| Utility tractor |
| Built in Highland Park, Michigan, USA |
| Original price was $3,222 in 1961 |
| Variants |
| 611 | Select-O-Speed, no PTO
|
| 621 | Four-speed, no PTO or 3-point
|
| 631 | Four-speed, no PTO
|
| 641 | Four-speed
|
| 651 | Five-speed
|
| 661 | Five-speed, live PTO
|
| 671 | Select-O-Speed
|
| 681 | Select-O-Speed, dual-speed PTO
|
| Ford 661 Power |
| Engine (gross) | 48.4 hp
36.1 kW
|
| Belt (claimed) | 32 hp
23.9 kW
|
| Plows | 2 (14-inch)
|
| Mechanical |
| Two-wheel drive |
| Steering | manual
|
| | power assist optional
|
| Differential mechanical expanding shoe brakes |
| Open operator station. |
| Capacity |
| Fuel | 13 gal
49.2 L
|
| Hydraulic system | 2 gal
7.6 L
|
| Rear axle | 8 qts
7.6 L
|
| Hydraulics |
| Type | open center
|
| Capacity | 2 gal
7.6 L
|
| Total flow | 4 gpm
15.1 lpm
|
| Tractor hitch |
| Rear Type | I
|
| Control | position and draft control
|
| Rear lift | 1250 lbs
567 kg
|
| Power Take-off (PTO) |
| Rear PTO | live
|
| Rear PTO Type | 540 (1.375)
|
| 661 Serial Number Location |
 |
| Transmission case, top left, behind the starter. |
| Electrical |
| Ground | positive (6V)
|
| | negative (12V)
|
| Charging system | generator
|
| Charging amps | 20
|
| Battery volts | 6 (gas/lp)
|
| | 12 (diesel)
|
| Battery AH | 80 (6V)
|
| | 135 (12V)
|
| References |
 |
| Tractors For Industrial Use published in 1958, by Ford |
| 1955-1960 Tractor Shop Manual (SE-8175) published in 1961 |
| Power Up with Ford published in 1957 |
| Diesel Tractors published in 1959, by Ford |
| New Ford 601 Series Workmaster Tractors published in 1957 |
| New Ford Workmaster Tractors published in 1957 |
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