Caterpillar D7C Specs ( 1955-1958 )
Overview
The Caterpillar D7C is a farm-type agricultural crawler tractor manufactured in Peoria, Illinois, between 1955 and 1958. It is equipped with a 13.6L four-cylinder diesel engine and 20-inch tracks, resulting in an operating weight of 26,930 pounds.
Ideal Applications
Tested Power Output:
During Nebraska Tractor Test 582, the D7C recorded a maximum belt power of 121.70 hp and a maximum drawbar pull of 26,286 lbs while utilizing a 5-speed gear transmission.
Mechanical Configuration:
The tractor features an open operator station with manual clutch steering, contracting band brakes, and a gasoline pony engine starter for the main 831 ci diesel power plant.
Dimensions and Chassis:
This crawler is built on a 74-inch gauge with a 167.6-inch length and 15.5-inch ground clearance, utilizing 20-inch wide tracks for ground contact.
Production
| Description | Agricultural Crawler tractor / Built in Peoria, Illinois, USA |
|---|---|
| Manufacturer | Caterpillar |
Engine
| Engine type | Caterpillar 13.6L 4-cyl diesel |
|---|---|
| Fuel tank | 85 gal (321.7 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 5.75x8.00 inches (146 x 203 mm) |
| Coolant capacity | 68 qts (64.4 L) |
| Description | Caterpillar D339 / diesel / 4-cylinder / liquid-cooled |
| Displacement | 831 ci (13.6 L) |
| Oil capacity | 22 qts (20.8 L) |
| Power | 128 hp (95.4 kW) |
| Rated RPM | 1200 |
| Starter | gasoline pony engine |
| Starter volts | 6 |
| Belt (tested) | 121.70 hp (90.8 kW) |
| Drawbar (claimed) | 102 hp (76.1 kW) |
| Drawbar (tested) | 103.65 hp (77.3 kW) |
Transmission
| Clutch | metallic wet disc |
|---|---|
| Gears | 5 forward and 4 reverse |
| Oil capacity | 43 qts (40.7 L) |
| Transmission type | 5-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. Cab optional with heater. |
|---|---|
| Description | Contracting band brakes |
| Drive | crawler |
| Steering | manual clutches |
Dimensions & Tires
| Clearance (drawbar) | 17.25 inches (43 cm) |
|---|---|
| Gauge | 74 inches (187 cm) |
| Ground clearance | 15.5 inches (39 cm) |
| Height (hood) | 81.25 inches (206 cm) |
| Length | 167.6 inches (425 cm) |
| Operating weight | 26930 lbs (12215 kg) |
| Shipping weight | 25970 lbs (11779 kg) |
| Width | 97 inches (246 cm) |
Caterpillar D7C Tracks
| Width | 20 inches (50 cm) |
|---|
Dimensions & Tracks
| Description | 20-inch tracks |
|---|---|
| Weight | 25970 to 26930 pounds |
Nebraska Tractor Test 582
| Belt fuel use (max) | 9.7 gal/hour (36.7 l/hour) |
|---|---|
| Belt power (max) | 121.70 hp (90.8 kW) |
| Description | Diesel 5-speed crawlerJuly 23 - August 6, 1956Link: Nebraska Tractor Test 582 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 103.65 hp (77.3 kW) |
| Max pull | 26,286 lbs (11923 kg) |
References
| Description | D7 Series C published in 1955, by Caterpillar |
|---|