| Manufacturer |
Oliver |
| Price |
8,200(USD) |
| Model |
990 |
| Equipment Type |
Standard-Tread Tractors |
| Factory |
Charles City, Iowa, USA |
ENGINE DETAIL
The Oliver 990 features a General Motors 3-71 diesel engine, which benefits from its two-cycle design offering superior torque and power delivery at lower RPMs, ideal for heavy-duty tasks. With a displacement of 213ci and a compression ratio of 17:1, this tractor provides efficient combustion and robust performance; however, the mechanical blower can introduce complexity in maintenance and potential repair costs. It operates best in agricultural settings requiring reliable, continuous power for extended periods, making it a solid choice for farming applications.
| Description |
General Motors 3-71 blower diesel 3-cylinder liquid-cooled two-cycle engine with mechanical blower |
| Displacemen |
213ci / 3.5L |
| Bore/Strok |
4.25x5.00inches / 108x 127mm |
| Compressio |
17:1 |
| Rated RP |
1800 |
| Starter volt |
12 |
OLIVER 990 ENGINE
The Oliver 990 features a General Motors 3.5L 3-cylinder diesel engine, providing robust torque and fuel efficiency suitable for medium-duty agricultural tasks. Its compact size and 3-cylinder configuration allow for agile maneuverability in tight spaces, but may limit power compared to larger tractors. Ideal for small farms or hobbyists, the Oliver 990 excels in light plowing, cultivation, and hauling.
| Description |
General Motors 3.5L 3-cyl diesel |
TRANSMISSION
The Oliver 990 features a 6-speed forward and 2-speed reverse gear configuration, allowing for versatile speed control across various agricultural tasks. The dry disc clutch provides reliable engagement with lower maintenance needs, though it may generate more heat under heavy usage compared to hydraulic clutches. Ideal for both field and transport applications, the gear setup enables efficient operation, but users should be cautious of potential clutch wear in prolonged heavy-duty scenarios.
| Typ |
gear |
| Gear |
6 forward and 2 reverse |
| Clutc |
dry disc |
OLIVER 990 TRANSMISSION
The Oliver 990 tractor's 6-speed gear system provides a versatile range of speeds for varying agricultural tasks, enhancing both efficiency and control in the field. Its mechanical simplicity can be an advantage for maintenance and repairs, although operators may require some time to master gear shifting effectively. Ideal for medium-scale farms, this gearbox setup supports diverse operations, but could pose challenges in steep or highly variable terrains due to potential power loss in higher gears.
MECHANICAL
The Oliver 990 tractor features a two-wheel drive system, offering good maneuverability but may struggle on uneven terrain compared to four-wheel drive models. Its disc brakes provide reliable stopping power, enhancing safety during field operations, although maintenance may be more involved than drum brakes. The open operator station and power steering contribute to operator comfort and ease of use, making it suitable for light to moderate agricultural tasks.
| Description |
Two-wheel drive Disc brakes Open operator station |
| Steerin |
power |
POWER TAKE-OFF (PTO)
| Rear PT |
independent OptOptional |
| Rear RP |
540 |
OLIVER 990 TIRES
The Oliver 990 tractor features an Ag front tire size of 7.50-18, which provides good maneuverability in tight spaces but may limit weight distribution. The diverse rear tire options (18-26, 14-34, 15-34) allow for flexibility in traction and stability, catering to different agricultural applications depending on soil conditions and load requirements. A challenge may arise in selecting the optimal rear tire size to match the intended usage, as this affects overall plowing performance and fuel efficiency.
| Ag fron |
7.50-18 |
| Ag rea |
18-26 / 14-34 / 15-34 |
DIMENSIONS & TIRES
The Oliver 990's wheelbase of 79.875 inches offers stability for various field operations, while its weight of 11,000 lbs provides a substantial ballast for traction. The front tires (7.50-18) and rear tires (18-26) allow for effective load distribution, enhancing its performance in plowing and heavy tillage tasks. However, the specific tire sizes may limit adaptability to certain soil conditions, necessitating careful consideration of terrain when selecting this model for varying agricultural applications.
| Wheelbas |
79.875inches / 202cm |
| Weigh |
11,000lbs / 4989kg |
| Front tir |
7.50-18 |
| Rear tir |
18-26 |
BELT PULLEY
| Diamete |
12.25inches / 31cm |
| Widt |
9inches / 22cm |
| RP |
1021 |
| Spee |
3277ft/min / 998.83meters/min |
