Allis Chalmers 6140
The Allis Chalmers 6140 is a utility tractor made from 1982 to 1985. It's a 2WD tractor with power steering and a synchromesh transmission that has 10 forward gears and 2 reverse gears. This tractor is powered by a Toyosha diesel engine with 3 cylinders and 40 horsepower. The engine is liquid-cooled and naturally aspirated, which means it doesn't use a turbocharger. The 6140 has a Category I three-point hitch that can lift up to 3,200 pounds, which is very high for its class. It has an independent PTO that runs at 540 rpm. The tractor weighs 4,000 pounds and measures 131.5 inches long, 68.1 inches wide, and 87.8 inches tall. It has an open operator station, but a ROPS (Roll-Over Protective Structure) and canopy were optional. The 6140 also features mechanical wet disc brakes, an open center hydraulic system, and agricultural tires on both front and rear. Some special features of the Allis Chalmers 6140 include a mechanical rear differential lock and inboard planetary final drive. It also has top-link draft sensing, which helps control the depth of implements. The tractor's engine displacement and power output are below average for its class, but its hitch capacity is very high. This makes the 6140 a good choice for farmers who need a compact tractor that can handle heavy lifting tasks.

Quick specs
- Category
- Utility
- Engine Power Output
- 40hp
- Operating Weight
- 4,000 lb
- Transmission
- Synchromesh
At a glance
How the 6140 compares
vs. Utility medianDistribution
Engine Power (hp)
Across all Utility tractors
This model
The 6140 ranks at the 33rd percentile for engine power among recorded utility tractors.
Overview
About the Allis Chalmers 6140
The Allis Chalmers 6140 is a utility tractor made from 1982 to 1985. It's a 2WD tractor with power steering and a synchromesh transmission that has 10 forward gears and 2 reverse gears. This tractor is powered by a Toyosha diesel engine with 3 cylinders and 40 horsepower. The engine is liquid-cooled and naturally aspirated, which means it doesn't use a turbocharger. The 6140 has a Category I three-point hitch that can lift up to 3,200 pounds, which is very high for its class. It has an independent PTO that runs at 540 rpm. The tractor weighs 4,000 pounds and measures 131.5 inches long, 68.1 inches wide, and 87.8 inches tall. It has an open operator station, but a ROPS (Roll-Over Protective Structure) and canopy were optional. The 6140 also features mechanical wet disc brakes, an open center hydraulic system, and agricultural tires on both front and rear. Some special features of the Allis Chalmers 6140 include a mechanical rear differential lock and inboard planetary final drive. It also has top-link draft sensing, which helps control the depth of implements. The tractor's engine displacement and power output are below average for its class, but its hitch capacity is very high. This makes the 6140 a good choice for farmers who need a compact tractor that can handle heavy lifting tasks.
Full specifications
Every recorded spec
General
| Manufacturer | Allis Chalmers |
|---|---|
| Model | 6140 |
| Category | Utility tractor |
| Type | 4x2 2WD |
| Years built | 1982–1985 |
| Operating weight | 4,000lb |
Engine
| Make | Toyosha |
|---|---|
| Power | 40hp |
| Cylinders | 3 |
| Displacement | 142.2ci |
| Bore | 3.86in |
| Stroke | 4.06in |
Transmission
| Type | Synchromesh |
|---|---|
| Forward gears | 10 |
| Reverse gears | 2 |
Chassis & drive
| Chassis | 4x2 2WD |
|---|---|
| Drive | 2WD |
| Steering | Power |
| Brakes | Mechanical wet disc |
| Cab | Open |
Hydraulics
| Type | Open center |
|---|
Power take-off
| Rear PTO | Independent |
|---|---|
| PTO speed | 540rpm |
Dimensions
| Length | 131.5in |
|---|---|
| Width | 68.1in |
| Height | 87.8in |
| Operating weight | 4,000lb |
Capacities
| Cooling system | 2.13gal |
|---|
Head to head
6140 vs. Utility median
How the Allis Chalmers 6140 compares to other Utility tractors
| Spec | This model | Utility median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 40 hp | 55 hp | -27% | 33rd |
| Engine Displacement | 142 ci | 183 ci | -22% | 36th |
| Cylinders | 3 | 4 | -25% | 23rd |
| Forward Gears | 10 | 12 | -17% | 39th |
| Operating Weight | 4,000 lb | 5,303 lb | -25% | 36th |
| Length | 132 in | 137 in | -4% | 43rd |
| Width | 68.1 in | 66 in | +3% | 55th |
| Height | 87.8 in | 94.1 in | -7% | 37th |
| 3-Point Hitch Capacity | 3,200 lb | 3,197 lb | 0% | 50th |
Medians and percentiles are computed from the utility tractors in our database with a recorded value for each spec (sample sizes 1,083–5,720 models).
Compare to tractors with similar specs
Commonly compared Allis Chalmers tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Allis Chalmers 5040 | 40 hp | 3,858 lb | 1976–1980 | Compare → |
| Allis Chalmers ED40 | 41 hp | 3,527 lb | — | Compare → |
| Allis Chalmers 5045 | 44 hp | 3,850 lb | 1981–1983 | Compare → |
| Allis Chalmers U | 34.12 hp | 5,030 lb | — | Compare → |
| Allis Chalmers 5030 | 31 hp | 2,530 lb | 1979–1985 | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Advance-Rumely OilPull K 12/20 | 40 hp | 6,430 lb | — | Compare → |
| Barreiros 40.45 | 40 hp | 4,850 lb | — | Compare → |
| Barreiros 4000 | 40 hp | 4,300 lb | — | Compare → |
| Barreiros 4000V | 40 hp | 3,440 lb | — | Compare → |
| Belarus KD-35 | 40 hp | — | — | Compare → |
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Gallery
Allis Chalmers 6140 photos



FAQ
Common questions
When was the Allis Chalmers 6140 in production?
Allis Chalmers 6140 production started in 1982 and ended in 1985.
What type of hydraulic system does the Allis Chalmers 6140 use?
Hydraulics on the Allis Chalmers 6140 are Open center.
What hitch category is the Allis Chalmers 6140?
The Allis Chalmers 6140 uses a Category I hitch with a lift capacity of 3,200 lb.
How much horsepower does the Allis Chalmers 6140 have?
The Allis Chalmers 6140 produces 40 hp from its 3-cylinder engine. Engine displacement is 142.2 ci.
How much does the Allis Chalmers 6140 weigh?
The Allis Chalmers 6140 weighs about 4,000 lb in operating condition.
What transmission is in the Allis Chalmers 6140?
Transmission on the Allis Chalmers 6140 is Synchromesh, with 10 forward speeds.
What maintenance does the Allis Chalmers 6140 require?
Like any tractor, the Allis Chalmers 6140 needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.



