Allis Chalmers HD6

The Allis Chalmers HD6 is a tractor produced by Allis Chalmers. It is equipped with a 344 ci 5.6 L engine. The listed engine power is Diesel (net): 57 hp / 42.5 kW. Transmission: 2 forward and reverse. Drive type: crawler. Operating weight: 12400 to 13400 pounds.

Engine Power

Diesel (net): 57 hp / 42.5 kW

Drive & Traction

crawler

Fuel & Capacities

40 gal 151.4 L

Transmission

2 forward and reverse

Operating Weight

13400 lbs 6078 kg

Overview

	1955 - 1974 Agricultural Crawler tractor

Production
Manufacturer	Allis Chalmers
Agricultural Crawler tractor
Built in Springfield, Illinois, USA

Variants
HD6A	44-inch gauge
HD6B	60-inch gauge
HD6E	5-roller
HD6G	loader
HD6EP	power shift
HD6AG	turbocharged

Allis Chalmers HD6 Engine
Allis-Chalmers 5.6L 4-cyl diesel
Fuel tank	40 gal 151.4 L
Engine details ...

Allis Chalmers HD6 Power
Engine (net)	57 hp 42.5 kW
Drawbar (claimed)	45 hp 33.6 kW
Belt (claimed)	55 hp 41.0 kW
Drawbar (tested)	49.95 hp 37.2 kW
Belt (tested)	60.51 hp 45.1 kW
Performance test details ...

Mechanical
Drive	crawler
Open operator station.

Dimensions & Tracks
Weight	12400 to 13400 pounds
13-inch tracks
Full dimensions and tracks ...

References

HD-6 published in 1955, by Allis Chalmers
Engineering-in-Action published in 1956, by Allis Chalmers
Farm Crawlers published in 1962, by Allis Chalmers
Crawler Tractor Farming published by Allis Chalmers
Big Power Farming published in 1965, by Allis Chalmers

Engine

Engine Detail — 344 ci / 5.6 L Diesel

Manufacturer	Allis-Chalmers HD-344
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled vertical I-head
Displacement	344 ci 5.6 L
Bore/Stroke	4.4375x5.5626 inches 113 x 141 mm
Power (net)	57 hp 42.5 kW
Compression	15.0:1
Rated RPM	1800
Starter volts	24
Oil capacity	10 qts 9.5 L
Coolant capacity	15 qts 14.2 L

Allis Chalmers HD6 Engine

Transmission

Transmission options
5-speed sliding gear
2-speed power shift

Transmission — 5 forward and 1 reverse sliding gear

Type	sliding gear
Gears	5 forward and 1 reverse
Oil capacity	20 qts 18.9 L

Transmission — 2 forward and reverse power shift

Type	power shift
Gears	2 forward and reverse

Dimensions

Allis Chalmers HD6 Tracks
Width	13 inches 33 cm

Dimensions
Length	127 inches 322 cm
Width	78.5 inches 199 cm
Height	66 inches 167 cm
Shipping weight	12400 lbs 5624 kg
Operating weight	13400 lbs 6078 kg
Gauge	44 inches 111 cm (HD6A)
Gauge	60 inches 152 cm (HD6B)

Tests

Nebraska Tractor Test 580
Diesel 5-speed crawler July 7 - 14, 1956 Link: Nebraska Tractor Test 580 file
Belt power (max)	60.51 hp 45.1 kW
Belt fuel use (max)	5.3 gal/hour 20.1 l/hour
Drawbar performance
Max power	49.95 hp 37.2 kW
Gear 2 used for power test.
Max pull	12636 lbs 5731 kg
Gear 1 used for pull test.

Photos

1961 Allis-Chalmers model HD-6E.

Recommended Implements & Sizing Guide

Engineering recommendations for Allis Chalmers HD6 based on its 57 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	3 to 4 Bottom (16")3 - 4 铧 (40 cm)	Heavy Duty	Suitable for medium loam and stubble turnover.
Rotary Cutter / MowerMowing & Clearing	6 ft (72 in)1.8 m	Medium Duty	Medium pasture clearing; rear slip-clutch recommended.
Rotary TillerSeedbed Prep	66 to 72 in165 - 180 cm	Medium Duty	Standard utility tiller; slip clutch protection required.
Disc HarrowSecondary Tillage	7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙	Medium Duty	Field leveling and clod breaking behind plows.
Hay BalerHay & Forage	Small Square Baler (14x18")小方捆打捆机 (36x46 cm)	Medium Duty	Classic 2-string baler for horse and small livestock hay.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Allis Chalmers HD6.

Estimated Continuous Field Runtime: 13.5 hrs

Approximately 13.5 hours of continuous field operation at ~75% rated power on a full tank (40 gal / 151.4 L).

Estimated 75% Load Fuel Burn~3 gal/hr (11.2 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours