Serial Number Location
The serial number for the Ford 641 is:
Serial Numbers by Year:
| Year |
Serial Number Range |
| 1957 |
1001 – 11930 |
| 1958 |
11931 – 58312 |
| 1959 |
58313 – 105942 |
| 1960 |
105943 – 131427 |
| 1961 |
131428 – 155531 |
| 1962 |
155532 and up |
Key Specifications
| Feature |
Specification |
| Engine Options |
2.2L (134 cu in) gas/LP or 2.4L (144 cu in) diesel |
| Horsepower (Gross) |
~42.6 HP (31.8 kW) |
| PTO Power |
~31.78 HP (23.7 kW) |
| Transmission Options |
4-speed gear (1 reverse) or 12-speed gear (3 reverse) |
| Fuel Capacity |
11 gal (41.6 L) |
| Operating Weight |
~3,285 lbs (1,490 kg) |
Hydraulic System
| Feature |
Specification |
| Type |
Open center |
| Hydraulic Capacity |
8 gal (30.3 L) |
| 3-Point Hitch |
Category I |
| Lift Capacity |
1,250 lbs (567 kg) |
Dimensions
| Feature |
Measurement |
| Wheelbase |
75.2 in (191 cm) |
| Length |
121.4 in (308 cm) |
| Width |
64.75 in (164 cm) |
| Height |
58.7 in (149 cm) |
| Ground Clearance |
21 in (53 cm) |
Tire Sizes
-
Front: 5.50-16
-
Rear: 11-28
Key Features
-
Workmaster Utility – Designed for general-purpose farm and utility work
-
Engine Versatility – Available in gasoline, LP-gas, or diesel configurations
-
Transmission Options – Basic 4-speed or optional 12-speed gearboxes for better speed control
-
PTO & Lift Ready – Includes PTO and 3-point hitch as standard on 641 variant
-
Simple & Serviceable – Excellent parts support and repairability
Model Series Reference
600 Series (1954–1957):
-
640: 4-speed, PTO & 3-point hitch
-
650: 5-speed, no live PTO
-
660: 5-speed, live PTO
601 Workmaster Series (1957–1962):
-
641: 4-speed, with PTO & 3-point hitch
-
651: 5-speed, non-live PTO
-
661: 5-speed, live PTO
-
671: Select-O-Speed w/ single-speed PTO
-
681: Select-O-Speed w/ dual-speed PTO
Note: Ford 641 is the functional successor to the 640 with modernized badging and serial designation.
Common Replacement Parts
Get reliable Ford 641 parts at Broken Tractor:
Engine
-
Fuel pumps, pistons, valve cover gaskets, carburetors, glow plugs (diesel)
Transmission
-
Gear sets, input shafts, clutch discs, shift levers, gaskets
PTO & Hitch
-
PTO shafts, clutch kits, lift arms, top links, stabilizer brackets
Hydraulics
Electrical
-
Starters, distributors, wiring harnesses, switches, voltage regulators
Maintenance Schedule
| Task |
Recommended Interval |
| Oil & Filter Change |
Every 100 hours or seasonally |
| Air Filter Service |
Monthly or more often in dusty conditions |
| Fuel Filter Cleaning |
Every 200 hours |
| Coolant Flush |
Every 2 years |
| Hydraulic Oil Service |
Every 400 hours |
| Greasing Points |
Weekly or more under heavy use |
