Introduction
Caterpillar D4D SA Agricultural Crawler Tractor
The Caterpillar D4D SA is a crawler tractor produced between 1966 and 1983, specifically engineered for agricultural applications. As part of Caterpillar's historical lineup of track-type machines, it was designed to provide high traction and stability in demanding field environments.
Engine and Power
The tractor is powered by the Caterpillar D330 engine, a liquid-cooled, 4-cylinder inline diesel unit. With a displacement of 7.0 liters (425 cubic inches), it produces a gross power output of 74 hp (55.2 kW) at a rated speed of 2000 RPM. The drawbar power is rated at 68 hp (50.7 kW), reflecting its primary utility in pulling heavy implements.
Transmission and Mechanical Layout
The D4D SA utilizes a gear-type transmission providing 5 forward and 5 reverse speeds, allowing for a range of operational work speeds. The chassis is supported by 16-inch tracks, which distribute the machine's 15,200 lbs (6894 kg) weight to minimize ground pressure. The operator station is open by design, with options for a four-post ROPS structure or an enclosed cab to enhance operator safety.
Hydraulic System
The machine features an open-center hydraulic system. It operates at a pressure of 1250 psi (86.2 bar) and delivers a pump flow rate of 20 gpm (75.7 lpm), providing the necessary hydraulic power to operate mounted or trailed agricultural implements.
Electrical and Maintenance
Electrical power is supplied by a 12-volt battery system, supported by an alternator for charging. Routine maintenance requirements include an engine oil capacity of 20 quarts (18.9 liters), a coolant capacity of 32 quarts (30.3 liters), and a transmission oil capacity of 24 quarts (22.7 liters). The engine is started via a 24-volt electric starter system.
Conclusion
The Caterpillar D4D SA is a robust crawler tractor suited for heavy-duty agricultural tasks requiring consistent drawbar pull and high-traction performance. Its mechanical simplicity and durable build quality make it a representative model of mid-20th-century agricultural engineering.
Production Information of Caterpillar, D4D SA
- Agricultural Crawler tractor
| Manufacturer | Caterpillar |
|---|
Engine Specifications of Caterpillar, D4D SA
- Caterpillar D330
- Liquid-cooled inline
- Diesel
- 4-cylinder
| Oil capacity | 20 qts [18.9 L] |
|---|---|
| Displacement | 425 ci [7.0 L] |
| Rated RPM | 2000 |
| Bore/Stroke | 4.75x6.00 inches [121 x 152 mm] |
| Coolant capacity | 32 qts [30.3 L] |
| Starter volts | 24 |
| Starter | Electric |
| Power (gross) | 74 hp [55.2 kW] |
Transmission Information of Caterpillar, D4D SA
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 5 forward and reverse |
| Oil capacity | 24 qts [22.7 L] |
Mechanical Specs of Caterpillar, D4D SA
- Open operator station. Four-post ROPS and cab available.
| Drive | Crawler |
|---|
Power Information of Caterpillar, D4D SA
| Engine (gross) | 74 hp [55.2 kW] |
|---|---|
| Drawbar (claimed) | 68 hp [50.7 kW] |
Hydraulics Specifications of Caterpillar, D4D SA
| Type | Open center |
|---|---|
| Pressure | 1250 psi [86.2 bar] |
| Pump flow | 20 gpm [75.7 lpm] |
Electrical System of Caterpillar, D4D SA
| Charging system | Alternator |
|---|---|
| Charging amps | 19 |
| Battery volts | 12 |
Where it sits
With 74 HP, the Caterpillar D4D SA sits just below D4E SA (97 HP) in Caterpillar's range. Its power puts it in the 75th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the Caterpillar D4D SA have?
The Caterpillar D4D SA delivers 74 HP.
What years was the Caterpillar D4D SA produced?
The Caterpillar D4D SA was produced in 1966-1983.
What engine does the Caterpillar D4D SA have?
The Caterpillar D4D SA is powered by a Diesel, 4-cylinder engine.
What transmission does the Caterpillar D4D SA use?
The Caterpillar D4D SA uses a Gear transmission.