| Manufacturer |
Caterpillar |
| Price |
- |
| Model |
D4 |
| Equipment Type |
Agricultural Crawler Tractors |
| Factory |
Peoria, Illinois, USA |
NEBRASKA TRACTOR TEST 273 2
| Description |
Diesel 5-speed crawler/October 14 - 28, 1936/Link: Nebraska Tractor Test 273 file/Drawbar performance/Gear 2 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
39.82 hp/29.7 kW |
| Belt fuel use (max) |
2.9 gal/hour/11.0 l/hour |
| Max power |
35.06 hp/26.1 kW |
| Max pull |
7852 lbs/3561 kg |
CATERPILLAR D4 POWER
| Drawbar (tested) |
35.06 hp/26.1 kW |
| Belt (tested) |
39.82 hp/29.7 kW |
ENGINE DETAIL
The Caterpillar D4 tractor features the D4400 diesel engine, offering a robust torque of 421 lb-ft at 1000 RPM, which is ideal for heavy-duty applications and improved low-end power. Its oil bath air cleaner ensures enhanced filtration, reducing maintenance needs in dusty conditions, though the 17.3:1 compression ratio and 1400 RPM rated speed suggest lower efficiency compared to modern engines. With a total displacement of 5.1 L and substantial coolant capacity, this tractor is suitable for extended operating periods but may be challenged by fuel consumption in demanding scenarios.
| Description |
Caterpillar D4400/diesel/4-cylinder/liquid-cooled/The D4400 was used on the RD4/D4 tractors through the 5T series. |
| Displacement |
312 ci/5.1 L |
| Bore/Stroke |
4.25x5.50 inches/108 x 140 mm |
| Air cleaner |
oil bath |
| Compression |
17.3:1 |
| Rated RPM |
1400 |
| Torque |
421 lb-ft/570.9 Nm |
| Torque RPM |
1000 |
| Oil capacity |
16 qts/15.1 L |
| Coolant capacity |
44 qts/41.6 L |
CATERPILLAR D4 ENGINE
The Caterpillar D4 tractor features a robust 5.1L 4-cylinder diesel engine, emphasizing fuel efficiency while delivering reliable power for rugged applications. Its 20-gallon (75.7 L) fuel tank provides extended operational intervals, reducing downtime for refueling in extensive tasks. Potential challenges may include sourcing parts for older models and ensuring compatibility with modern attachments; thus, assessing the tractor's longevity against available service support is essential for optimal performance.
| Description |
Caterpillar 5.1L 4-cyl diesel |
| Fuel tank |
20 gal/75.7 L |
TRANSMISSION
The Caterpillar D4 tractor features a standard gear transmission with 5 forward gears and 1 reverse, allowing for versatile operation in various terrains. Its dry disc clutch enhances durability, but may require more effort for engagement compared to hydraulic systems, which could be a consideration for prolonged usage. With an oil capacity of 20 quarts (18.9 L), regular maintenance is essential to ensure optimal performance and longevity, particularly under heavy-duty conditions.
| Type |
gear |
| Gears |
5 forward and 1 reverse |
| Clutch |
dry disc |
| Oil capacity |
20 qts/18.9 L |
MECHANICAL
The Caterpillar D4 tractor features a crawler chassis, providing superior traction on uneven terrain, ideal for land grading and agricultural tasks. Its manual clutch steering can be a challenge for operators used to more modern hydrostatic systems, requiring more effort and skill to maneuver. The 5-speed transmission allows for flexibility in speed control, beneficial for both heavy-duty tasks and precision work, though proper gear shifting is critical for optimal performance and longevity.
| Chassis |
crawler |
| Steering |
manual clutches |
| Cab |
Open operator station. |
| Transmission |
5-speed gear |
CATERPILLAR D4 TRACKS
DIMENSIONS
| Wheelbase |
61.125 inches/155 cm |
| Length |
120.7 inches/306 cm |
| Width |
62 inches/157 cm (44 |
| Height (hood) |
60.625 inches/153 cm |
| Weight |
9970 lbs/4522 kg (44 |
| Ground clearance |
11.125 inches/28 cm |
| Clearance (drawbar) |
14.25 inches/36 cm |
| Gauge |
60 inches/152 cm |
DIMENSIONS & TRACKS
| Wheelbase |
61.125 inches/155 cm |
| Weight |
9970 to 10250 pounds |
| Description |
13-inch tracks |
D4 SERIAL NUMBERS
| 1936 |
4G1 |
| 1937 |
4G3663 |
| 1938 |
4G8858 |
| 1939 |
7J1 |
| 1940 |
7J1758 |
| 1941 |
7J4119 |
| 1942 |
7J7544 |
| 1943 |
7J2T1 |
| 1944 |
2T3306 |
| 1945 |
5T1 |
| 1946 |
5T3524 |
| 1947 |
5T6780 |
