Cletrac FD

Last Updated: July 2024

Overview

The Cletrac FD is a robust crawler tractor model manufactured by the Cleveland Tractor Company. It is powered by a Hercules DHXB diesel engine (serial number P360835) with 6 vertically-oriented cylinders and a displacement of 707 cubic inches. This liquid-cooled, naturally aspirated engine runs on commercial diesel fuel, features bore and stroke dimensions of 5.00 inches by 6.00 inches, and a rated RPM of 1300. The tractor is equipped with a gear transmission system offering 4 forward gears (1.61, 2.62, 3.66, and 5.00 mph) and 2 reverse gears (1.58 and 2.75 mph). Based on independent test results, the maximum observed belt horsepower is 100.58 HP, and the maximum observed drawbar horsepower is 86.18 HP. The operating weight of the Cletrac FD is 30,103 pounds with the operator. Additional details include an American Bosch fuel system model APE6B80 B300S9I, a Rosch centrifugal governor, a Mogulator double-element oil filter, and a track-type chassis with a 239.33-inch track length and 2.5-inch cleat size. Repairs during testing included replacing fuel injection lines.

Key Specifications

Transmission: Gear

Operating Weight: 30103

Fuel Type: Diesel

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Cletrac FD Tractor

Technical Specifications

Engine

Manufacturer: Hercules
Model: DHXB
Cooling Type: Liquid-cooled
Cylinder Orientation: -
Valve Configuration: -
Fuel Type: Diesel
Induction Type: Natural
Cylinders: 6
Displacement (ci): 707
Bore (in): 5
Stroke (in): 6
Rated RPM: 1300
Power Output (hp): -

Transmission

Type: Gear
Forward Gears: 4
Reverse Gears: 2
Total Gears: -

Dimensions

Length (in): 173
Width (in): 94.5
Height (in): 84
Operating Weight (lb): 30103

Power Take-Off (PTO)

PTO Type: -
PTO Speed 1 (rpm): -
PTO Speed 2 (rpm): -
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: -
Drive Type: -
Steering Type: -
Coolant Capacity (qts): -
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: -
Manufacture - End Year: -
Hitch Type: -
Hitch Category: -
Hitch Position: -
Hitch Capacity (lb): -
Operator Station Type: -
Starter Type: Electric
Brake Type: -
Hydraulic System Type: -

Test Results

Nebraska Tractor Test Laboratory - Test Date: June 15 to July 17, 1936

Maximum Power and Fuel Consumption

Observed Belt Horsepower: 100.58 HP
Fuel Consumption at 100% Load: 7.396 gal/hr
Brake Horsepower Hourly Fuel Consumption: 0.513 lbs per HP.hr

Drawbar Performance

Drawbar Power at Maximum Load: 86.18 HP
Fuel Consumption at Maximum Load: Not Recorded
Power at Rated Engine Speed (Second Gear): 68.83 HP with a drawbar pull of 9386 lbs at 2.75 mph

Torque and Engine Performance

Engine Model: Hercules
Serial Number: H360340
Type: 6-cylinder, vertical diesel

Fuel and Oil

Fuel Used: Diesel with a weight of 6.97 pounds per gallon
Oil Used: S.A.E. Viscosity No. 30
Total Oil in Engine: 5.39 quarts

Overall Efficiency

Sealed Maximum Horsepower:
Drawbar: 91.04 HP
Belt: 107.52 HP
Recommended Horsepower Ratings (A.S.A.E. and S.A.E):
Drawbar: 68.28 HP
Belt: 91.39 HP

NTTL. (1936). Test 263: Cletrac Model FD. Nebraska Tractor Test Laboratory. University of Nebraska-Lincoln. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/867