| Manufacturer | Oliver |
| Price | 6,500(USD) |
| Model | 1555 |
| Equipment Type | Row-Crop Tractors |
| Factory |
NEBRASKA TRACTOR TEST 943 2
| Description | Diesel Hydra-Power 2WD June 8 - 15, 1966 Link: Nebraska Tractor Test 943 file PTO performance Drawbar performance Gear 4-Hydra used for power test. Gear 2-Hydra used for pull test |
| Power at rated engine speed | 53.50hp / 39.9kW |
| Fuel use | 4.4gal/hour / 16.7l/hour |
| Max power | 45.7hp / 34.1kW |
| Max pull | 6,636lbs / 3010kg |
NEBRASKA TRACTOR TEST 944 2
| Description | Gasoline Hydra-Power 2WD June 8 - 16, 1966 Link: Nebraska Tractor Test 944 file PTO performance Drawbar performance Gear 4-Hydra used for power test. Gear 2-Hydra used for pull test |
| Power at rated engine speed | 53.3hp / 39.7kW |
| Fuel use | 4.9gal/hour / 18.5l/hour |
| Max power | 45.4hp / 33.9kW |
| Max pull | 6,799lbs / 3084kg |
OLIVER 1555 POWER
| PTO (claimed) | 53hp / 39.5kW |
| Drawbar (tested) | 45.7hp / 34.1kW |
| PTO (tested) | 53.50hp / 39.9kW |
ENGINES OVERVIEW
The Oliver 1555 tractor is equipped with either a Waukesha-Oliver 3.8L 6-cylinder diesel engine or a gasoline variant, offering flexibility depending on fuel availability and cost. The diesel engine typically showcases better torque characteristics and fuel efficiency, making it suitable for heavier agricultural work, while the gasoline engine may provide easier starting and lower initial maintenance costs. However, users should be aware of the diesel engine's potential for higher emissions and the necessity for periodic fuel filter changes to maintain performance.
| Description | Waukesha-Oliver 3.8L 6-cyl diesel Waukesha-Oliver 3.8L 6-cyl gasoline |
ENGINE DETAIL 1
The Oliver 1555 features a robust Waukesha-Oliver 6-cylinder diesel engine with a displacement of 3.8L, providing excellent torque for heavy-duty applications. With a high compression ratio of 165:1, it delivers strong power output at a rated RPM of 2200, making it suitable for tasks such as plowing or hauling. Challenges may arise from its dry air cleaner system which necessitates regular maintenance to prevent dust ingress, potentially impacting engine performance if neglected.
| Description | Waukesha-Oliver diesel 6-cylinder liquid-cooled |
| Displacement | 232ci / 3.8L |
| Bore/Stroke | 3.625x3.75inches / 92x 95 mm |
| Air cleaner | dry |
| Compression | 165:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Oil capacity | 6 qts /5.7 L |
| Coolant capacity | 20qts / 18.9L |
ENGINE DETAIL 2
The Oliver 1555 features a robust Waukesha-Oliver gasoline engine with a respectable compression ratio of 8:1, providing moderate power output while maintaining fuel efficiency. Its 232ci displacement and low rated RPM of 2200 suggest suitability for torque-heavy tasks such as plowing or hauling, but may limit top-end speed for transport applications. The dry air cleaner and liquid cooling system enhance reliability and maintenance simplicity, although the relatively small oil capacity may require more frequent changes in harsh operating conditions.
| Description | Waukesha-Oliver gasoline 6-cylinder liquid-cooled |
| Displacement | 232ci / 3.8L |
| Bore/Stroke | 3.625x3.75inches / 92x 95 mm |
| Air cleaner | dry |
| Compression | 8:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Oil capacity | 6 qts /5.7 L |
| Coolant capacity | 20qts / 18.9L |
OLIVER 1555 ENGINES
The Oliver 1555 tractor is powered by a choice of Waukesha-Oliver 3.8L 6-cylinder diesel or gasoline engines, facilitating versatility depending on fuel availability and application. The diesel variant offers better fuel efficiency and torque for heavy-duty tasks, while the gasoline model may provide easier starting and lower initial costs. However, potential challenges include higher maintenance costs for the diesel engine due to its complexity and the need for specific filters and fuel types.
| Description | Waukesha-Oliver 3.8L 6-cyl diesel Waukesha-Oliver 3.8L 6-cyl gasoline |
TRANSMISSIONS OVERVIEW
The Oliver 1555 tractor features a 12-speed partial power shift transmission combined with a 6-speed unsynchronized gear system, providing versatility in various operational scenarios. The partial power shift allows for smoother shifting between gears, enhancing productivity in demanding tasks; however, the unsynchronized gears may require more operator skill during manual shifts. This combination is beneficial for agricultural applications requiring frequent speed and power adjustments but may challenge new operators unfamiliar with gear engagement techniques.
| Description | 12-speed partial power shift 6-speed unsynchronized gear |
TRANSMISSION 1
The Oliver 1555 tractor features a Hydra-Power transmission with a partial power shift system, allowing for quick transitions between direct-drive and lower speed ranges, which enhances operational efficiency during variable tasks. With 12 forward and 4 reverse gears, it offers flexibility and adaptability for different farming scenarios. The dry disc clutch, measuring 279.4mm, provides reliable engagement but may require more precise handling compared to hydraulic clutches in terms of slip and wear.
| Transmission | Hydra-Power |
| Type | partial power shift |
| Gears | 12 forward and 4 reverse |
| Clutch | 279.4mm dry disc |
| Description | The Hydra-Power transmission provides a two-speed power shift between direct-drive and the lower Hydra-Power range. |
TRANSMISSION 2
The Oliver 1555 features an unsynchronized 6-speed forward and 2-speed reverse gear system, which may require precise shifting techniques from operators, especially at higher speeds. The 279.4mm dry disc clutch provides a reliable engagement but may present challenges in smooth operation under heavy loads. With a 40-quart oil capacity, maintenance intervals are crucial to ensure optimal performance and prevent overheating during extensive use.
| Type | unsynchronized gear |
| Gears | 6 forward and 2 reverse |
| Clutch | 279.4mm dry disc |
| Oil capacity | 40qts / 37.9L |
MECHANICAL
The Oliver 1555's 4x2 2WD chassis offers a straightforward drive system, suitable for light to moderate field tasks but may struggle with steep terrain or muddy conditions compared to 4WD models. Its 12-speed partial power shift transmission enables smoother gear transitions, enhancing operator efficiency, though the 6-speed unsynchronized gear may require more skill for effective operation. The open operator station provides visibility and ventilation, but the optional enclosed cab with a heater is a valuable upgrade for adverse weather use.
| Chassis | 4x2 2WD |
| Steering | power |
| Brakes | disc |
| Cab | Open operator station. Cab optional with available heater. |
| Transmissions | 12-speed partial power shift/6-speed unsynchronized gear |
CAPACITY
| Fuel | 27.5gal / 104.1L |
| Hydraulic system | 14gal / 53.0L |
HYDRAULICS
| Type | open center |
| Capacity | 14gal / 53.0L |
| Valves | 2 to 4 |
TRACTOR HITCH
| Rear Type | II/I |
| Control | lower-link draft control |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000/540/1000 |
OLIVER 1555 TIRES
The Oliver 1555 tractor features versatile agricultural tire options, allowing for enhanced traction and stability depending on field conditions, with front tires sized 5.50-16 and rear options ranging from 12.4-38 to 16.9-34. This variability in rear tire size can optimize performance for various agricultural tasks, such as tilling or hauling, but may require careful consideration of load capacity and overall gear ratios to avoid mechanical strain. Users should assess soil type and intended use to select the most effective tire configuration for maximum efficiency and longevity.
| Ag front | 5.50-16 |
| Ag rear | 12.4-38/13.6-38/14.9-38/16.9-34 |
DIMENSIONS
| Wheelbase | 99inches / 251cm |
| Length | 154.5inches / 392cm |
| Width | 81.5inches / 207cm *Minimum width |
| Height (steering wheel) | 80inches / 203cm |
| Height (exhaust) | 97.625inches / 247cm |
| Shiping weight | 6841lbs / 3103kg |
| Ground clearance | 25.375inches / 64cm |
| Front tread | 51.5 to 87.5inches / 130to 222 cm |
| Rear tread | 56.5 to 89.5inches / 143to 227 cm |
DIMENSIONS & TIRES
The Oliver 1555 tractor features a compact wheelbase of 99 inches, which enhances maneuverability in tight spaces while providing stability during operation. Weighing 6,841 lbs, it offers a solid foundation for heavy-duty tasks but may experience challenges in transportability. The tire sizes—7.50-16 on the front and 15.5-38 on the rear—suggest a design optimized for traction and power on various terrains, making it ideal for farming applications but potentially limiting speed on roads.
| Wheelbase | 99inches / 251cm |
| Weight | 6841lbs / 3103kg |
| Front tire | 7.50-16 |
| Rear tire | 15.5-38 |
1555 SERIAL NUMBERS
| Location | Serial number plate below instrument panel. |
| 1969 | 218-128 |
| 1970 | 221-295 |
| 1971 | 225-914 |
| 1972 | 232-089 |
| 1973 | 236-883 |
| 1974 | 244-937 |
| 1975 | 256-165 |
| Final | 262-877 |