| Manufacturer | Oliver |
| Price | 3,500(USD) |
| Model | 99 |
| Equipment Type | Standard-Tread Tractors |
| Factory | Charles City, Iowa, USA |
NEBRASKA TRACTOR TEST 451 2
| Description | Gasoline 4-speed 2WD/September 29 - October 9, 1950/Link: Nebraska Tractor Test 451 file/Drawbar performance/Gear 2 used for power test./Gear 1 used for pull test. |
| Belt power (max) | 62.28 hp/46.4 kW |
| Belt fuel use (max) | 6.3 gal/hour/23.8 l/hour |
| Max power | 52.05 hp/38.8 kW |
| Max pull | 7,594 lbs/3444 kg |
OLIVER 99 POWER
| Plows | 5 |
| Drawbar (tested) | 52.05 hp/38.8 kW |
| Belt (tested) | 62.28 hp/46.4 kW |
ENGINES OVERVIEW
The Oliver 99 tractor features a choice of engines, including the powerful 7.3L 4-cylinder gasoline and the robust 4.9L 6-cylinder diesel/gasoline from Waukesha-Oliver, making it versatile for various farming tasks. The gasoline engine offers higher RPMs and quicker power delivery, while the diesel variant provides superior torque and fuel efficiency, ideal for heavy-duty applications. Operators should consider the fuel availability and maintenance requirements, as diesel engines might incur additional service challenges compared to gasoline ones.
| Description | Oliver 7.3L 4-cyl gasoline/Waukesha-Oliver 4.9L 6-cyl diesel/Waukesha-Oliver 4.9L 6-cyl gasoline |
ENGINE DETAIL 1
The Oliver 99 tractor features a robust 4-cylinder gasoline engine with a generous displacement of 443 ci (7.3 L) and a low compression ratio of 5.5:1, which enhances fuel stability but limits power output. The oil bath air cleaner effectively protects the engine from dust and dirt, while the dual starter system (hand-crank and electric) provides versatility in starting under various conditions. Ideal for low-RPM applications, this model is well-suited for farming tasks requiring reliable power at moderate speed, although its relatively low rated RPM may restrict performance in high-demand scenarios.
| Description | Oliver/gasoline/4-cylinder/liquid-cooled |
| Displacement | 443 ci/7.3 L |
| Bore/Stroke | 4.75x6.25 inches/121 x 159 mm |
| Air cleaner | oil bath |
| Compression | 5.5:1 |
| Rated RPM | 1125 |
| Starter type | hand-crank/electric |
ENGINE DETAIL 2
The Oliver 99 features a Waukesha-Oliver diesel engine with a 6-cylinder configuration, providing robust torque suitable for heavy-duty applications. Its 302 ci (4.9 L) displacement and a square bore/stroke of 4.00 inches (102 mm) contribute to efficient power delivery at a rated RPM of 1675, making it ideal for farming and industrial tasks requiring sustained loads. However, the limitations of lower RPM may affect its performance in high-speed operations, potentially requiring careful gearing in specific farming applications.
| Description | Waukesha-Oliver/diesel/6-cylinder/liquid-cooled/Available in styled 99, after 1952 |
| Displacement | 302 ci/4.9 L |
| Bore/Stroke | 4.00x4.00 inches/102 x 102 mm |
| Rated RPM | 1675 |
ENGINE DETAIL 3
The Oliver 99 features a robust Waukesha 6-cylinder engine with a 302 ci (4.9 L) displacement, providing a balanced power output at a rated RPM of 1675, which is suited for various agricultural tasks. The equal bore and stroke of 4.00 inches (102 mm) allows for efficient combustion and torque delivery, making it versatile for both fieldwork and hauling. However, being a liquid-cooled gasoline engine may present challenges in extremely cold environments, requiring effective cooling system management to prevent freezing.
| Description | Waukesha-Oliver/gasoline/6-cylinder/liquid-cooled/Available in styled 99, after 1952 |
| Displacement | 302 ci/4.9 L |
| Bore/Stroke | 4.00x4.00 inches/102 x 102 mm |
| Rated RPM | 1675 |
OLIVER 99 ENGINES
The Oliver 99 tractor features robust engine options, including a 7.3L 4-cylinder gasoline engine and Waukesha-Oliver's 4.9L 6-cylinder diesel and gasoline variants. Its substantial 34-gallon fuel tank enhances operational efficiency, making it suitable for extended fieldwork. However, engine choice may impact maintenance complexity and fuel economy, with diesel variants typically offering superior torque and efficiency at the cost of potential higher initial investment.
| Description | Oliver 7.3L 4-cyl gasoline/Waukesha-Oliver 4.9L 6-cyl diesel/Waukesha-Oliver 4.9L 6-cyl gasoline |
| Fuel tank | 34 gal/128.7 L |
TRANSMISSION
The Oliver 99 tractor features a straightforward 4 forward and 1 reverse gear configuration, which facilitates basic agricultural tasks but may limit efficiency for more complex operations. The dry disc clutch offers reliable engagement but may require more frequent maintenance compared to wet clutches, especially under heavy loads. Overall, it suits small to medium-scale farming applications where simplicity and ease of use are prioritized.
| Type | gear |
| Gears | 4 forward and 1 reverse |
| Clutch | dry disc |
MECHANICAL
The Oliver 99 tractor features a 4x2 2WD chassis, which provides basic traction but may struggle on uneven terrain compared to 4WD models. Its manual steering and contracting band brakes can introduce operator fatigue and inconsistent stopping power during extended use, particularly on slopes. With a 4-speed transmission, this tractor offers adequate speed versatility for farming tasks, but the lack of modern cab insulation may expose operators to noise and weather elements.
| Chassis | 4x2 2WD |
| Steering | manual |
| Brakes | contracting band |
| Cab | Open operator station. |
| Transmission | 4-speed gear |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540 (1.375) |
OLIVER 99 TIRES
The Oliver 99 tractor features front tires sized at 7.50-18, providing a balanced load distribution essential for maneuverability and stability during field operations. The rear tire options (13-30, 14-30, 15-30) allow for flexibility in traction and flotation depending on soil conditions, enhancing performance in varying agricultural tasks such as plowing and tilling. The different rear tire widths can also impact overall power transfer and fuel efficiency, so selecting the appropriate size for specific applications is crucial.
| Ag front | 7.50-18 |
| Ag rear | 13-30/14-30/15-30 |
DIMENSIONS
| Wheelbase | 80 inches/203 cm |
| Length | 125.75 inches/319 cm |
| Width | 65 inches/165 cm |
| Height (hood) | 59.5 inches/151 cm |
| Operating weight | 7073 lbs/3208 kg |
| Ballasted weight | 13110 lbs/5946 kg |
| Rear tread | 52 inches/132 cm |
DIMENSIONS & TIRES
The Oliver 99 tractor features an 80-inch wheelbase, providing stable handling and improved traction on uneven terrain, which is beneficial for agricultural operations. Weighing 7,073 lbs, its significant mass enhances ground grip but may challenge maneuverability in tight spaces. The tire specifications (7.50-18 front and 46x12 rear) suggest suitability for heavy-duty tasks, although rear tire size may require careful consideration for compatibility with certain implements.
| Wheelbase | 80 inches/203 cm |
| Weight | 7073 lbs/3208 kg |
| Front tire | 7.50-18 |
| Rear tire | 46x12 |
99 SERIAL NUMBERS
| 1937 | 508918 |
| 1938 | 508935 |
| 1939 | 509612 |
| 1940 | 510068 |
| 1941 | 510564 |
| 1942 | 510977 |
| 1943 | 511296 |
| 1944 | 511474 |
| 1945 | 512044 |
| 1946 | 512821 |
| 1947 | 513106 |
| 1948 | 513856 |
| 1949 | 514856 |
| 1950 | 516276 |
| 1951 | 516888 |
| 1952 | 517874 |
BELT PULLEY
| Diameter | 16.75 inches/42 cm |
| Width | 8.25 inches/20 cm |
| RPM | 596 |
| Speed | 2600 ft/min/792.48 meters/min |