| Manufacturer |
Caterpillar |
| Price |
- |
| Model |
D9 |
| Equipment Type |
Agricultural Crawler Tractors |
| Factory |
Peoria, Illinois, USA |
NEBRASKA TRACTOR TEST 584
| Description |
Diesel 6-speed crawler/July 31 - August 4, 1956/Link: Nebraska Tractor Test 584 file/Drawbar performance/Gear 3 used for power test./Gear 1 used for pull test. |
| Max power |
252.2 hp/188.1 kW |
| Max pull |
56724 lbs/25730 kg |
CATERPILLAR D9 POWER
| Engine (net) |
286 hp/213.3 kW |
| Drawbar (claimed) |
230 hp/171.5 kW |
| Drawbar (tested) |
252.2 hp/188.1 kW |
ENGINE DETAIL
The Caterpillar D9 tractor is equipped with a powerful D353 turbocharged diesel engine, providing a substantial displacement of 24.1 L, making it ideal for heavy-duty applications. Its 15.5:1 compression ratio and a low rated RPM of 1240 ensure high torque output, beneficial for tough terrain and demanding tasks. However, the reliance on a 2-cylinder gas pony engine for starting may pose challenges in extreme cold conditions, requiring attention to maintenance and operational readiness.
| Description |
Caterpillar D353/turbocharged diesel/6-cylinder/liquid-cooled |
| Displacement |
1473 ci/24.1 L |
| Bore/Stroke |
6.25x8.00 inches/159 x 203 mm |
| Compression |
15.5:1 |
| Rated RPM |
1240 |
| Starter |
2-cylinder gas pony engine |
| Starter volts |
6*Electric starter for pony engine |
CATERPILLAR D9 ENGINE
The Caterpillar D9 tractor is powered by a robust 24.1L 6-cylinder diesel engine, providing exceptional torque and efficiency for heavy-duty applications. Its advantages include superior traction and stability, making it ideal for earthmoving and land clearing tasks. However, its large size may pose challenges in compact workspaces where maneuverability is limited.
| Description |
Caterpillar 24.1L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The Caterpillar D9 tractor features a 6-speed gear system paired with a 3-speed torque converter, enhancing its power delivery and drive versatility across varying terrains. The 6-speed transmission allows for precise control over speed and torque, making it ideal for heavy-duty applications such as land clearing and grading. However, a challenge may arise in maintaining optimal performance under extreme load conditions, requiring skilled operation to avoid gear slippage or torque converter overheating.
| Description |
6-speed gear/3-speed torque converter |
TRANSMISSION 1
The Caterpillar D9 tractor features a 6-forward and reverse gear transmission, providing versatility in various operational scenarios, particularly in heavy-duty applications. The wet disc clutch enhances durability and smooth engagement, reducing wear during extensive operations. Key advantages include improved traction control and efficiency, essential for tasks such as land preparation and material handling.
| Type |
gear |
| Gears |
6 forward and reverse |
| Clutch |
wet disc |
TRANSMISSION 2
The Caterpillar D9 tractor features a torque converter, enhancing power transfer and providing smooth acceleration, particularly advantageous in demanding terrain. Its 3 forward and 2 reverse gears allow for flexibility in maneuverability and power management, making it suitable for earthmoving and heavy-duty applications. Challenges may include maintaining optimal power-to-weight ratio and managing heat dissipation in prolonged operations.
| Type |
torque converter |
| Gears |
3 forward and 2 reverse |
MECHANICAL
The Caterpillar D9 tractor features a crawler chassis that enhances traction on rugged terrain, making it ideal for heavy-duty applications like land clearing and construction. Its open operator station provides good visibility but may expose the operator to environmental elements, which should be considered for comfort during extended operations. The 6-speed gear coupled with a 3-speed torque converter offers versatility in speed and power transfer, allowing for precise control under varying loads and conditions, although it may require more operator skill to manage effectively.
| Chassis |
crawler |
| Cab |
Open operator station. |
| Transmissions |
6-speed gear/3-speed torque converter |
CATERPILLAR D9 TRACKS
DIMENSIONS
| Length |
215 inches/546 cm |
| Width |
120 inches/304 cm |
| Height |
105 inches/266 cm |
| Operating weight |
66025 lbs/29948 kg |
| Gauge |
90 inches/228 cm |
DIMENSIONS & TRACKS
| Weight |
66025 lbs/29948 kg |
| Description |
90-inch tracks |
