Caterpillar Diesel Forty

The Caterpillar Diesel Forty is a tractor produced by Caterpillar. It is equipped with a 624 ci 10.2 L engine. Transmission: 4 forward and 1 reverse. Drive type: crawler. Operating weight: 15642 lbs 7095 kg.

Drive & Traction

crawler

Fuel & Capacities

45 gal 170.3 L

Transmission

4 forward and 1 reverse

Operating Weight

15642 lbs 7095 kg

Overview

	1934 - 1936 Agricultural Crawler tractor

Production
Manufacturer	Caterpillar
Agricultural Crawler tractor
Built in Peoria, Illinois, USA

Variants
Forty	gas engine
Diesel Forty	diesel engine

Caterpillar Diesel Forty Engine
Caterpillar 10.2L 3-cyl diesel
Fuel tank	45 gal 170.3 L
Engine details ...

Caterpillar Diesel Forty Transmission
4-speed gear
Transmission details ...

Caterpillar Diesel Forty Power
Drawbar (tested)	50.44 hp 37.6 kW
Belt (tested)	56.05 hp 41.8 kW
Performance test details ...

Mechanical
Drive	crawler
Open operator station

Dimensions & Tracks
Weight	15642 lbs 7095 kg
16-inch tracks
Full dimensions and tracks ...

Engine

Engine Detail — 624 ci / 10.2 L Diesel

Manufacturer	Caterpillar D6600
Fuel Type	Diesel
Configuration	3-cylinder, liquid-cooled
Displacement	624 ci 10.2 L
Bore/Stroke	5.75x8.00 inches 146 x 203 mm
Rated RPM	1000

Transmission

Transmission — 4 forward and 1 reverse gear

Type	gear
Gears	4 forward and 1 reverse

Dimensions

Caterpillar Diesel Forty Tracks
Width	16 inches 40 cm

Dimensions
Weight	15642 lbs 7095 kg
Gauge	56 inches 142 cm
Gauge	74 inches 187 cm

Tests

Tractor Tests
NTTL 242: diesel (1000 RPM) 4-speed crawler
NTTL 243: diesel (850 RPM) 4-speed crawler

Nebraska Tractor Test 242
Diesel (1000 RPM) 4-speed crawler August 19 - September 9, 1935 Link: Nebraska Tractor Test 242 file
Belt power (max)	56.05 hp 41.8 kW
Belt fuel use (max)	4.1 gal/hour 15.5 l/hour
Drawbar performance
Max power	50.44 hp 37.6 kW
Gear 2 used for power test.
Max pull	9750 lbs 4422 kg
Gear 2 used for pull test.

Nebraska Tractor Test 243
Diesel (850 RPM) 4-speed crawler September 10 - 12, 1935 Link: Nebraska Tractor Test 243 file
Belt power (max)	48.60 hp 36.2 kW
Belt fuel use (max)	3.4 gal/hour 12.9 l/hour
Drawbar performance
Max power	42.82 hp 31.9 kW
Gear 1 used for power test.
Max pull	9692 lbs 4396 kg
Gear 1 used for pull test.

Photos

Caterpillar Diesel Forty tractor photo

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Caterpillar Diesel Forty.

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours