Allis Chalmers HD11
The Allis Chalmers HD11 is a powerful crawler tractor built for tough agricultural work. Made from 1955 to 1965, this tractor has tracks instead of wheels, making it great for working in muddy or uneven fields. It's a big machine, measuring 154 inches long, 40 inches wide, and 84 inches tall, with a heavy weight of 21,000 pounds. The HD11 is powered by a strong diesel engine made by Allis Chalmers. This engine has 6 cylinders and can produce 110 horsepower, which is above average for tractors of its time. It has a liquid-cooled system that holds 44 quarts of coolant to keep the engine running smoothly. The tractor has an open operator station, meaning the driver sits outside without a cab. It uses an electric starter to get the engine going and has special band brakes to help it stop. With 6 forward gears and 3 reverse gears, the HD11 can handle different speeds for various farming tasks.

Key specifications
- Category
- Crawler
- Engine power
- 110hp
- Operating weight
- 21,000 lb
- Transmission
- Sliding Gear
Category comparison
HD11 compared with its category
vs. Crawler medianDistribution
Engine Power (hp)
All recorded Crawler tractors
This model
The HD11 ranks at the 46th percentile for engine power among recorded crawler tractors.
Overview
About the Allis Chalmers HD11
The Allis Chalmers HD11 is a powerful crawler tractor built for tough agricultural work. Made from 1955 to 1965, this tractor has tracks instead of wheels, making it great for working in muddy or uneven fields. It's a big machine, measuring 154 inches long, 40 inches wide, and 84 inches tall, with a heavy weight of 21,000 pounds. The HD11 is powered by a strong diesel engine made by Allis Chalmers. This engine has 6 cylinders and can produce 110 horsepower, which is above average for tractors of its time. It has a liquid-cooled system that holds 44 quarts of coolant to keep the engine running smoothly. The tractor has an open operator station, meaning the driver sits outside without a cab. It uses an electric starter to get the engine going and has special band brakes to help it stop. With 6 forward gears and 3 reverse gears, the HD11 can handle different speeds for various farming tasks.
Full specifications
Recorded specifications
General
| Manufacturer | Allis Chalmers |
|---|---|
| Model | HD11 |
| Category | Crawler tractor |
| Type | Crawler |
| Years built | 1955–1965 |
| Operating weight | 21,000lb(9,525 kg) |
Engine
| Make | Allis Chalmers |
|---|---|
| Model | HD-516 |
| Power | 110hp(82.03 kW) |
| Cylinders | 6 |
| Displacement | 516ci(8.46 L) |
| Bore | 4.45in(113 mm) |
| Stroke | 5.55in(141 mm) |
Transmission
| Type | Sliding Gear |
|---|---|
| Forward gears | 6 |
| Reverse gears | 3 |
Chassis & drive
| Chassis | Crawler |
|---|---|
| Brakes | Contracting band |
| Cab | Open operator station |
Dimensions
| Length | 154in(3,912 mm) |
|---|---|
| Width | 40in(1,016 mm) |
| Height | 84in(2,134 mm) |
| Operating weight | 21,000lb(9,525 kg) |
Capacities
| Cooling system | 11gal(41.64 L) |
|---|
Closest alternatives
HD11 compared with the nearest models by horsepower
By engine horsepower, the nearest crawler models to the HD11 are the Massey Ferguson 3505 and the CaseIH Farmall 110M. The Massey Ferguson 3505 matches it on rated power and weighs 8,070 lb less, carrying 118 lb per horsepower against 191 lb. It entered production in 1983, 28 years after the HD11. The CaseIH Farmall 110M matches it on rated power.
| Spec | Allis Chalmers HD11 | Massey Ferguson 3505 | CaseIH Farmall 110M |
|---|---|---|---|
| Engine power | 110 hp82 kW | 110 hp82 kW | 110 hp82 kW |
| Operating weight | 21,000 lb9,525 kg | 12,935 lb5,867 kg | - |
| Weight per hp | 191 lb/hp116 kg/kW | 118 lb/hp72 kg/kW | - |
| Displacement | 516 ci8.46 L | 354 ci5.8 L | 207 ci3.39 L |
| Cylinders | 6 | 6 | 4 |
| Transmission | Sliding Gear | Partial power shift | partial power shift |
| Years built | 1955-1965 | 1983-1987 | - |
Calculators
Calculators for the HD11
PTO power
About 91 to 99 PTO hp
Estimated from the 110 hp engine rating. The calculator also estimates drawbar power by surface.
Implement sizing
Implements a 110 hp tractor can run
Maximum size is about a 13 ft rotary cutter or a 11 ft tiller. The calculator also sizes discs, plows and balers.
Ballast
222 lb per PTO hp as listed
The calculator gives the target weight and front/rear split for each job.
Units
110 hp is 82.0 kW
The converter gives kW and metric PS values, as used on European spec sheets.
Category medians
HD11 vs. Crawler median
Allis Chalmers HD11 compared with other Crawler tractors
| Spec | This model | Crawler median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 110 hp | 200 hp | -45% | 46th |
| Engine Displacement | 516 ci | 468 ci | +10% | 58th |
| Cylinders | 6 | 6 | at median | 50th |
| Forward Gears | 6 | 10 | -40% | 34th |
| Operating Weight | 21,000 lb | 23,320 lb | -10% | 48th |
| Length | 154 in | 146 in | +5% | 54th |
| Width | 40 in | 79.5 in | -50% | 6th |
| Height | 84 in | 90.6 in | -7% | 43rd |
Medians and percentiles are calculated from the crawler tractors in the database that have a recorded value for each specification (sample size 134–192 models).
Same manufacturer
Other Allis Chalmers models
Other manufacturers
Models with similar horsepower
Gallery
Allis Chalmers HD11 photos





FAQ
Frequently asked questions
When was the Allis Chalmers HD11 in production?
Allis Chalmers HD11 production started in 1955 and ended in 1965.
How much horsepower does the Allis Chalmers HD11 have?
The Allis Chalmers HD11 produces 110 hp from its 6-cylinder engine. Engine displacement is 516 ci.
How much does the Allis Chalmers HD11 weigh?
The Allis Chalmers HD11 weighs about 21,000 lb in operating condition.
What transmission is in the Allis Chalmers HD11?
Transmission on the Allis Chalmers HD11 is Sliding Gear, with 6 forward speeds.
What maintenance does the Allis Chalmers HD11 require?
The Allis Chalmers HD11 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.



