| Manufacturer |
Oliver |
| Price |
2,000(USD) |
| Model |
66 |
| Equipment Type |
Row-Crop Tractors |
| Factory |
Charles City, Iowa, USA |
NEBRASKA TRACTOR TEST 412 2
| Description |
Gasoline 6-speed 2WD/June 6 - 24, 1949/Link: Nebraska Tractor Test 412 file/Drawbar performance/Gear 3 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
24.91 hp/18.6 kW |
| Belt fuel use (max) |
2.1 gal/hour/7.9 l/hour |
| Max power |
21.03 hp/15.7 kW |
| Max pull |
3,207 lbs/1454 kg |
NEBRASKA TRACTOR TEST 467 2
| Description |
Diesel 6-speed 2WD/October 12 - 18, 1951/Link: Nebraska Tractor Test 467 file/Drawbar performance/Gear 3 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
25.03 hp/18.7 kW |
| Belt fuel use (max) |
1.8 gal/hour/6.8 l/hour |
| Max power |
22.50 hp/16.8 kW |
| Max pull |
3,571 lbs/1619 kg |
OLIVER 66 POWER
| Plows |
2 (14-inch) |
| Drawbar (tested) |
22.50 hp/16.8 kW |
| Belt (tested) |
25.03 hp/18.7 kW |
ENGINES OVERVIEW
The Oliver 66 tractor is powered by either a 2.1L 4-cylinder gasoline or diesel engine, offering versatility depending on fuel preference. The gasoline variant typically provides quicker starts and lower initial costs, while the diesel option delivers better fuel efficiency and torque for heavy-duty applications. Key challenges include the availability of parts due to the tractor's age and potential fuel system maintenance for the gasoline engine.
| Description |
Oliver-Waukesha 2.1L 4-cyl gasoline/Oliver-Waukesha 2.1L 4-cyl diesel |
ENGINE DETAIL 1
The Oliver 66 features a 129 ci (2.1 L) liquid-cooled, 4-cylinder engine with a low compression ratio of 6.75:1, suitable for lower power output but efficient operation. Its bore/stroke ratio of 3.3125x3.75 inches suits moderate torque characteristics, ideal for agricultural tasks at a rated RPM of 1600. Despite the outdated Marvel-Schebler carburetor, the oil bath air cleaner enhances engine longevity through better filtration, although maintenance may present challenges due to its complexity.
| Description |
Oliver-Waukesha/gasoline/4-cylinder/liquid-cooled vertical I-head |
| Displacement |
129 ci/2.1 L |
| Bore/Stroke |
3.3125x3.75 inches/84 x 95 mm |
| Fuel system |
Marvel-Schebler carburetor |
| Air cleaner |
oil bath |
| Compression |
6.75:1 |
| Rated RPM |
1600 |
| Coolant capacity |
14 qts/13.2 L |
ENGINE DETAIL 2
The Oliver 66 tractor features a robust 4-cylinder Waukesha diesel engine with a 15.5:1 compression ratio, enabling efficient combustion and enhanced torque at a rated RPM of 1600, which is beneficial for heavy-duty tasks. With a displacement of 129.3 cu in (2.1 L) and a bore/stroke ratio conducive to durability, it can handle various agricultural applications effectively. However, the oil bath air cleaner might require more maintenance compared to modern paper filters, posing a management challenge for operators.
| Description |
Oliver-Waukesha/diesel/4-cylinder/liquid-cooled vertical I-head |
| Displacement |
129.3 ci/2.1 L |
| Bore/Stroke |
3.3125x3.75 inches/84 x 95 mm |
| Air cleaner |
oil bath |
| Compression |
15.5:1 |
| Rated RPM |
1600 |
OLIVER 66 ENGINES
The Oliver 66 tractor features a robust 2.1L 4-cylinder engine available in both gasoline and diesel configurations, offering versatility depending on fuel preference. With a fuel tank capacity of 10 gallons (37.9 L), it provides a decent operating range for light to moderate agricultural tasks, although larger jobs may require more frequent refueling. Key advantages include its compact size for maneuverability and efficiency, but potential challenges may include limited power output for heavier applications.
| Description |
Oliver-Waukesha 2.1L 4-cyl gasoline/Oliver-Waukesha 2.1L 4-cyl diesel |
| Fuel tank |
10 gal/37.9 L |
TRANSMISSION
The Oliver 66 tractor features an unsynchronized gear transmission with 6 forward and 2 reverse gears, offering flexibility in speed selection for various field tasks. The dry disc clutch provides reliable engagement but may require more maintenance compared to wet clutches, especially in heavy-duty applications. This tractor is well-suited for lighter agricultural tasks, but operators should be cautious of shift timing to avoid gear grinding due to the unsynchronized nature.
| Type |
unsynchronized gear |
| Gears |
6 forward and 2 reverse |
| Clutch |
dry disc |
MECHANICAL
The Oliver 66 tractor features a 4x2 2WD chassis, which offers simplicity but limits traction in challenging terrain, making it ideal for flat fields or lighter applications. Its manual steering may require more effort, especially in tight turns, while the contracting band brakes provide adequate stopping power but can lack precision compared to modern hydraulic brakes. With a 6-speed unsynchronized transmission, operators must be skilled in shifting to optimize performance, making this tractor best suited for experienced users in less demanding conditions.
| Chassis |
4x2 2WD |
| Steering |
manual |
| Brakes |
contracting band |
| Cab |
Open operator station. |
| Transmission |
6-speed unsynchronized gear |
TRACTOR HITCH
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540 |
OLIVER 66 TIRES
The Oliver 66 tractor, equipped with Ag front tires (5.00-15) and variable size Ag rear tires (8-38, 9-38, or 10-38), offers versatility in agricultural applications, allowing for different load capacities and traction options. The choice of rear tire size impacts stability, power transfer, and overall traction on varied terrains, with larger tires providing better flotation and grip in softer soils. However, the limited front tire size may reduce steering responsiveness in heavy loads or challenging conditions, necessitating careful consideration of operational environment.
| Ag front |
5.00-15 |
| Ag rear |
8-38/9-38/10-38 |
DIMENSIONS
| Wheelbase |
86.75 inches/220 cm |
| Length |
134.8 inches/342 cm |
| Height |
85.25 inches/216 cm |
| Ground clearance |
24.4 inches/61 cm |
| Front tread |
50.75 to 87.75 inches/128 to 222 cm (wide-front) |
| Rear tread |
60 to 88 inches/152 to 223 cm |
OLIVER 66 WEIGHT
| Operating |
3,193 lbs/1448 kg (gas)/3,795 lbs/1721 kg (diesel) |
| Ballasted |
5,563 lbs/2523 kg |
DIMENSIONS & TIRES
The Oliver 66 tractor features a wheelbase of 86.75 inches, which provides stability during field operations but may limit maneuverability in tight spaces. Weighing between 3,193 and 3,795 pounds, it offers substantial traction for larger implements but may require additional power for hills or heavy soil conditions. The tire configuration, with front 5.00-15 and rear 8-38 sizes, supports optimal weight distribution, although narrow front tires may limit flotation in muddy terrain.
| Wheelbase |
86.75 inches/220 cm |
| Weight |
3193 to 3795 pounds |
| Front tire |
5.00-15 |
| Rear tire |
8-38 |
66 SERIAL NUMBERS
| 1949 |
420001 |
| 1950 |
423101 |
| 1951 |
426011 |
| 1952 |
429771 |
| 1953 |
3503990 |
| 1954 |
4500309 |
| Final |
4503563 |
BELT PULLEY
| Diameter |
11.875 inches/30 cm |
| Width |
7.25 inches/18 cm |
| RPM |
987 |
| Speed |
3,065 ft/min/934.21 meters/min |
