Allis Chalmers industrial tractors

Allis Chalmers HD-4

The Allis Chalmers HD-4 is an industrial crawler tractor produced from 1966 to 1969. It features a 3.3L 4-cylinder diesel engine producing 52 hp gross, coupled with a 3-speed torque converter transmission. The tractor has a crawler drive with external band brakes and an open operator station. It offers hydraulic pressure of 1625 psi with a pump flow of 15 gpm, optional 25 gpm. The HD-4 weighs 8500 lbs and runs on 12-inch tracks with various track width options. It is related to the Allis Chalmers 650 model produced later.

Power-

Founded-

ModelHD-4

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Technical Specifications

Detailed specifications and technical data for Allis Chalmers HD-4

Power

Engine (gross)	52 hp (38.8 kW)

Engine

Model	Allis Chalmers 3.3L 4-cyl diesel
Torque	141.5 lb-ft (191.9 Nm)
Starter	electric
Fuel tank	18 gal (68.1 L)
Rated RPM	2100
Torque RPM	1600
Air cleaner	dry
Bore/Stroke	3.88x4.25 inches (99 x 108 mm)
Compression	16.25:1
Displacement	200 ci (3.3 L)
Oil capacity	8 qts (7.6 L)
Power (gross)	52 hp (38.8 kW)
Starter volts	12
Coolant capacity	16 qts (15.1 L)

Variants

H-4	gasoline
HD-4	diesel
HD-4 Loader	loader-crawler

Hydraulics

Pressure	1625 psi (112.0 bar)
Pump flow	15 gpm (56.8 lpm)
Optional pump flow	25 gpm (94.6 lpm)

Mechanical

Drive	crawler
Brakes	External band brakes
Operator station	Open operator station

Production

Type	Industrial Crawler tractor
Manufacturer	Allis Chalmers
Years produced	1966 - 1969

Transmission

Type	torque converter
Gears	3 forward and reverse
Clutch	hydraulic disc
Oil capacity	12.25 qts (11.6 L)

Serial Numbers

Location	Serial number on the front of the crawler, below the grill.

Dimensions & Tracks

Gauge	51 inches (129 cm)
Width	61 inches (154 cm) *Minimum width with 10-inch shoes
Length	108.875 inches (276 cm)
Weight	8500 lbs (3855 kg)
Track width	12 inches (30 cm)
Height (hood)	73.625 inches (187 cm)
Long-track width	12 inches (30 cm)
Other track widths	10 inches (25 cm), 14 inches (35 cm)
Clearance (drawbar)	10 inches (25 cm)
Track area on ground	765 in² (0.5 m²)
Track length on ground	63.75 inches (161 cm)
Long-track area on ground	837 in² (0.5 m²)
Long-track length on ground	69.75 inches (177 cm)