| Manufacturer |
Cletrac |
| Price |
- |
| Model |
DD |
| Equipment Type |
Agricultural Crawler Tractors |
| Factory |
Cleveland, Ohio, USA |
NEBRASKA TRACTOR TEST 436
| Description |
Diesel 4-speed crawler/November 8 - 22, 1949/Link: Nebraska Tractor Test 436 file/Drawbar performance/Gear 3 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
73.3 hp/54.7 kW |
| Belt fuel use (max) |
4.7 gal/hour/17.8 l/hour |
| Max power |
58.81 hp/43.9 kW |
| Max pull |
14735 lbs/6683 kg |
CLETRAC DD POWER
| Drawbar (claimed) |
45 hp/33.6 kW |
| Belt (claimed) |
63 hp/47.0 kW |
| Drawbar (tested) |
58.81 hp/43.9 kW |
| Belt (tested) |
73.3 hp/54.7 kW |
ENGINE DETAIL
The Cletrac DD tractor features a robust Hercules DRXB 6-cylinder diesel engine with a displacement of 474 ci (7.8 L) and a 15:1 compression ratio, optimizing torque delivery for heavy-duty applications. With a rated RPM of 1300, it provides efficient fuel consumption while the Vortox oil bath air cleaner minimizes maintenance needs and enhances engine longevity. This tractor's liquid-cooled system with a coolant capacity of 41 quarts (38.8 L) is advantageous for prolonged operation in rugged conditions, although it may require additional attention in extreme cold to prevent coolant freeze-up.
| Description |
Hercules DRXB/diesel/6-cylinder/liquid-cooled vertical I-head |
| Displacement |
474 ci/7.8 L |
| Bore/Stroke |
4.375x5.25 inches/111 x 133 mm |
| Air cleaner |
Vortox oil bath |
| Compression |
15:1 |
| Rated RPM |
1300 |
| Starter volts |
24 |
| Coolant capacity |
41 qts/38.8 L |
CLETRAC DD ENGINE
The Cletrac DD tractor is powered by a Hercules 7.8L 6-cylinder diesel engine, providing substantial torque for heavy-duty applications. With a 30-gallon fuel tank, it offers extended operational time suitable for large farms or construction sites. However, the weight of the tractor may limit mobility on softer terrain, necessitating proper planning regarding ground conditions.
| Description |
Hercules 7.8L 6-cyl diesel |
| Fuel tank |
30 gal/113.6 L |
TRANSMISSION
The Cletrac DD tractor features a [-|-] gear type transmission offering 4 forward and 2 reverse gears, allowing for versatile speed control and efficient maneuverability in varied terrain. Its dry disc clutch provides reliable engagement but may result in increased wear during heavy use. Ideal for tasks requiring precise control, it may face challenges in steep or slippery conditions due to potential clutch slippage.
| Type |
gear |
| Gears |
4 forward and 2 reverse |
| Clutch |
dry disc |
MECHANICAL
The Cletrac DD tractor features a crawler chassis that provides superior traction on challenging terrains, making it ideal for agricultural and construction applications. Its open operator station enhances visibility but may expose the operator to the elements, a consideration for prolonged use in harsher climates. The 4-speed gear transmission offers versatility in speed and torque management, enabling efficient operation across varied workloads.
| Chassis |
crawler |
| Cab |
Open operator station. |
| Transmission |
4-speed gear |
CLETRAC DD TRACKS
DIMENSIONS
| Length |
128 inches/325 cm |
| Height |
67 inches/170 cm |
| Weight |
13300 lbs/6032 kg |
DIMENSIONS & TRACKS
| Weight |
13300 lbs/6032 kg |
| Description |
tracks |
DD SERIAL NUMBERS
| 1937 |
1L3000 |
| 1938 |
1L3736 |
| 1939 |
1L4220 |
| 1940 |
1L5222 |
| 1941 |
1L5644 |
| 1942 |
1L6332 |
| 1943 |
1L6560 |
| 1944 |
1L6820 |
| 1945 |
1L7422 |
| 1946 |
1L8012 |
| 1947 |
2L0194 |
| 1948 |
------ |
| 1949 |
2L2142 |
| 1950 |
2L3528 |
| 1951 |
2L4080 |
| 1952 |
2L5046 |
| 1953 |
3500000 |
| 1954 |
4500000 |
| 1955 |
3L226 |
| 1956 |
3L404 |
| 1957 |
3L498 |
| 1958 |
3L596 |
