| Manufacturer |
Caterpillar |
| Price |
- |
| Model |
D2 |
| Equipment Type |
Agricultural Crawler Tractors |
| Factory |
Peoria, Illinois, USA |
NEBRASKA TRACTOR TEST 322 2
| Description |
251 diesel 5-speed crawler/July 24 - August 4, 1939/Link: Nebraska Tractor Test 322 file/PTO performance/Drawbar performance/Gear 1 used for power test. |
| Belt power (max) |
30 hp/22.4 kW |
| Power at rated engine speed |
27.5 hp/20.5 kW |
| Fuel use |
2.1 gal/hour/7.9 l/hour |
| Max power |
25.2 hp/18.8 kW |
| Max pull |
5,903 lbs/2677 kg |
NEBRASKA TRACTOR TEST 418 2
| Description |
252 diesel 5-speed crawler/July 11 - 26, 1949/Link: Nebraska Tractor Test 418 file/PTO performance/Drawbar performance/Gear 2 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
36.02 hp/26.9 kW |
| Power at rated engine speed |
32.9 hp/24.5 kW |
| Fuel use |
2.4 gal/hour/9.1 l/hour |
| Max power |
30.31 hp/22.6 kW |
| Max pull |
6,778 lbs/3074 kg |
NEBRASKA TRACTOR TEST 553 2
| Description |
252 diesel 5-speed crawler/July 25 - 30, 1955/Link: Nebraska Tractor Test 553 file/PTO performance/Drawbar performance/Gear 2 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
41.86 hp/31.2 kW |
| Power at rated engine speed |
29 hp/21.6 kW |
| Fuel use |
2.7 gal/hour/10.2 l/hour |
| Max power |
36.62 hp/27.3 kW |
| Max pull |
7,413 lbs/3362 kg |
CATERPILLAR D2 POWER
| Drawbar (tested) |
36.62 hp/27.3 kW |
| PTO (tested) |
32.9 hp/24.5 kW |
| Belt (tested) |
41.86 hp/31.2 kW |
ENGINES OVERVIEW
The Caterpillar D2 tractor features a robust powertrain with options for a 3.6L or 4.1L 4-cylinder diesel engine, providing durability and efficient fuel consumption, ideal for agricultural and industrial applications. Key advantages include its compact size for maneuverability and the solid torque delivery facilitating heavy-duty tasks. However, challenges may arise with parts availability for vintage models and potential difficulty in sourcing skilled technicians familiar with older Caterpillar systems.
| Description |
Caterpillar 3.6L 4-cyl diesel/Caterpillar 4.1L 4-cyl diesel |
ENGINE DETAIL 1
The Caterpillar D2 operates a 4-cylinder diesel engine, offering a displacement of 3.6 L which ensures adequate power for agricultural or industrial tasks. With a rated RPM of 1525 and peak torque of 125 lb-ft at 1050 RPM, it provides strong low-end torque, ideal for heavy loads and demanding applications. However, its vintage design may present challenges in fuel efficiency and maintenance compared to modern tractors; thus, ensure available parts and service knowledge for optimal operation.
| Description |
Caterpillar/diesel/4-cylinder/liquid-cooled |
| Displacement |
221 ci/3.6 L |
| Bore/Stroke |
3.75x5.00 inches/95 x 127 mm |
| Rated RPM |
1525 |
| Torque |
125 lb-ft/169.5 Nm |
| Torque RPM |
1050 |
ENGINE DETAIL 2
The Caterpillar D2 tractor features a robust 4-cylinder diesel engine with a displacement of 4.1 L, offering high torque at low RPMs, ideal for heavy-duty agricultural tasks. Its notable 18.5:1 compression ratio enhances fuel efficiency and power output, while the unique gasoline pony motor starter facilitates easier cold starts. Challenges may include the older technology's limited power-to-weight ratio compared to modern tractors, making it less suitable for high-speed applications but advantageous for stable, low-speed operations in challenging terrains.
| Description |
Caterpillar/diesel/4-cylinder/liquid-cooled |
| Displacement |
252 ci/4.1 L |
| Bore/Stroke |
4.00x5.00 inches/102 x 127 mm |
| Compression |
18.5:1 |
| Rated RPM |
1525 (early)/1650 (late) |
| Starter type |
gasoline pony motor |
CATERPILLAR D2 ENGINES
The Caterpillar D2 tractor features a choice between a 3.6L or 4.1L four-cylinder diesel engine, offering a balance of power and fuel efficiency for agricultural and construction tasks. Key advantages include robust torque characteristics, ideal for heavy-duty tasks, though users may experience challenges with maintenance accessibility due to the compact design. For optimal performance, ensure regular servicing, especially of the fuel system, to maintain efficiency in varied operational scenarios.
| Description |
Caterpillar 3.6L 4-cyl diesel/Caterpillar 4.1L 4-cyl diesel |
TRANSMISSION
The Caterpillar D2 tractor features a [-|-] gear type transmission with 5 forward speeds and 1 reverse, allowing for versatility in various terrains and tasks. Its dry disc clutch offers efficient power transfer but may require more frequent adjustments compared to wet clutches, particularly in heavy-load scenarios. This tractor is ideal for moderate agricultural work and light construction tasks, balancing durability and operational efficiency.
| Type |
gear |
| Gears |
5 forward and 1 reverse |
| Clutch |
dry disc |
MECHANICAL
The Caterpillar D2 features a crawler chassis, providing excellent traction on uneven terrain, which is advantageous for agricultural and construction applications. Its mechanical clutch steering system allows for precise maneuverability, albeit requiring skill to operate effectively. With a 5-speed gear transmission, the D2 offers flexibility in speed management, making it suitable for various workload intensities.
| Chassis |
crawler |
| Steering |
mechanical clutches |
| Cab |
Open operator station. |
| Transmission |
5-speed gear |
CATERPILLAR D2 TRACKS
DIMENSIONS
| Length |
108 inches/274 cm |
| Height |
57.5 inches/146 cm |
| Weight |
7420 lbs/3365 kg (1939)/8536 lbs/3871 kg (1955) |
| Gauge |
50 inches/127 cm |
DIMENSIONS & TRACKS
| Weight |
7420 to 8536 pounds |
| Description |
12-inch tracks |
