Caterpillar Twenty-Eight Specs ( 1933-1935 )
Overview
The Caterpillar Twenty-Eight is an agricultural crawler tractor produced in Peoria, Illinois, between 1933 and 1935. This model features a 4.5L four-cylinder gasoline engine rated at 1100 RPM, delivering a claimed 37.5 hp at the belt and 30.5 hp at the drawbar.
Ideal Applications
Engine and Power Ratings:
The 277 ci liquid-cooled gasoline engine is rated for 37.5 belt horsepower and 30.5 drawbar horsepower at 1100 RPM.
Belt Pulley and PTO Configuration:
The tractor is equipped with an 11.75-inch diameter belt pulley rotating at 935 RPM and a 540-type rear PTO.
Mechanical and Transmission Layout:
This crawler-drive machine utilizes a gear transmission with three forward gears and one reverse gear, supported by a 7,870 lb operating weight.
Production
| Description | Agricultural Crawler tractor / Built in Peoria, Illinois, USA |
|---|---|
| Manufacturer | Caterpillar |
| Total built | 1171 |
Engine
| Engine type | Caterpillar 4.5L 4-cyl gasoline |
|---|---|
| Air cleaner | oil bath |
| Bore/Stroke | 4.1875x5.50 inches (106 x 140 mm) |
| Description | Caterpillar / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 277 ci (4.5 L) |
| Rated RPM | 1100 |
| Belt (claimed) | 37.5 hp (28.0 kW) |
| Drawbar (claimed) | 30.5 hp (22.7 kW) |
Transmission
| Gears | 3 forward and 1 reverse |
|---|---|
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
PTO
| Rear PTO Type | 540 (1.375) |
|---|
Dimensions & Tires
| Height | 60.6 inches (153 cm) |
|---|---|
| Length | 116.1 inches (294 cm) |
| Weight | 7870 lbs (3569 kg) |
| Width | 61.5 inches (156 cm) |
Belt Pulley
| Diameter | 11.75 inches (29 cm) |
|---|---|
| RPM | 935 |
| Speed | 2580 ft/min (786.38 meters/min) |
| Width | 6.5 inches (16 cm) |
Dimensions & Tracks
| Description | Tracks |
|---|---|
| Weight | 7870 lbs (3569 kg) |