| Manufacturer | RK Tractors |
| Price | 21,799(USD) |
| Model | RK55S |
| Equipment Type | Compact Utility Tractors |
| Factory |
RK TRACTORS RK55S POWER
| Engine (gross) | 55.1 hp/41.1 kW |
| PTO (claimed) | 44.9 hp/33.5 kW |
ENGINE DETAIL
The RK55S tractor, powered by a Yanmar turbocharged diesel engine with a 2.1 L displacement, delivers robust performance with 55.1 hp at 2800 RPM, ensuring efficiency for heavy-duty tasks. Its common rail direct injection system enhances fuel efficiency and reduces emissions, making it environmentally friendlier while maintaining power output. However, consider that the turbocharged nature may require more frequent maintenance, especially in high-demand agricultural scenarios.
| Description | Yanmar 4TNV86T-CR/turbocharged diesel/4-cylinder/liquid-cooled |
| Displacement | 127.6 ci/2.1 L |
| Bore/Stroke | 3.39x3.54 inches/86 x 90 mm |
| Power (gross) | 55.1 hp/41.1 kW |
| Fuel system | common rail direct injection |
| Rated RPM | 2800 |
| Starter | electric |
| Starter volts | 12 |
RK TRACTORS RK55S ENGINE
The RK55S features a Yanmar 2.1L 4-cylinder diesel engine, providing reliable power for various agricultural tasks. With a fuel tank capacity of 17 gallons (64.3 L), it offers extended operation between refueling, which is advantageous for long-duration field work. However, the challenge lies in ensuring adequate maintenance of the diesel system to prevent performance issues in demanding environments.
| Description | Yanmar 2.1L 4-cyl diesel |
| Fuel tank | 17 gal/64.3 L |
TRANSMISSION
The RK55S tractor features a mechanical shuttle transmission with 16 forward and reverse gears, allowing for precise speed adjustments and efficient operation in various field conditions. The four synchronized gears across four ranges offer enhanced maneuverability and adaptability, making it suitable for tasks requiring fine control, such as tilling or planting. A potential challenge may arise during rapid direction changes, as the mechanical shuttle requires manual operation, which could lead to fatigue during extended use compared to hydrostatic alternatives.
| Type | mechanical shuttle |
| Gears | 16 forward and reverse |
| Description | Four synchronized gears (1-4) in four ranges with mechanical shuttle. |
SPEEDS
| Description | Reverse speeds are 15% slower than forward./ |
MECHANICAL
The RK55S tractor features a 4x4 MFWD system, providing enhanced traction in diverse terrains, making it suitable for both agricultural and load-hauling tasks. Its 16-speed mechanical shuttle transmission allows for precise speed control, crucial for varying application needs, although it may require a learning curve for optimal operation. The inclusion of wet disc brakes provides superior stopping power and reduced wear, ensuring reliable performance in challenging conditions, although the two-post ROPS cab design offers limited overhead protection compared to full cab configurations.
| Chassis | 4x4 MFWD 4WD |
| Steering | power |
| Brakes | wet disc |
| Cab | Two-post ROPS. |
| Transmission | 16-speed mechanical shuttle |
HYDRAULICS
| Valves | 2 |
| Pump flow | 9.5 gpm/36.0 lpm |
| Total flow | 14.5 gpm/54.9 lpm |
| Steering flow | 5 gpm/18.9 lpm |
TRACTOR HITCH
| Rear Type | I |
| Control | position and draft control |
| Rear lift (at ends) | 3314 lbs/1503 kg |
| Rear lift (at 24 | 2945 lbs/1335 kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | electro-hydraulic |
| Rear RPM | 540 (1.375) |
RK TRACTORS RK55S TIRES
The RK Tractors RK55S is equipped with standard agricultural tires (9.5x16 front and 14.9x24 rear), optimized for fieldwork and crop management, offering good traction and stability on uneven terrain. For specialized applications, turf tires (12x16.5 front and 16.9x24 rear) enhance performance on lawns and sensitive ground, reducing potential turf damage. The availability of industrial tire options also allows for versatility in construction and earth-moving tasks, but switching to non-agricultural tires may sacrifice some field efficiency.
| Standard tires (ag) | Front: 9.5x16. Rear: 14.9x24 |
| Lawn/turf front | 12x16.5 |
| Lawn/turf rear | 16.9x24 |
| Industrial front | 12x16.5 |
| Industrial rear | 16.9x24 |
DIMENSIONS
| Wheelbase | 76.2 inches/193 cm |
| Length | 141.3 inches/358 cm |
| Width | 63.8 inches/162 cm |
| Height (ROPS) | 102.1 inches/259 cm |
| Weight | 3814 lbs/1730 kg |
| Ground clearance | 13.8 inches/35 cm |
DIMENSIONS & TIRES
The RK55S tractor has a compact wheelbase of 76.2 inches, enhancing maneuverability in tight spaces, which is beneficial for landscaping or small farm operations. Weighing 3814 lbs, its stability allows for efficient operation of implements, but may present challenges when traversing soft or uneven terrain. The front and rear tire sizes (9.5x16 and 14.9x24 respectively) provide good traction and load distribution, making it suitable for both towing and ground engagement tasks.
| Wheelbase | 76.2 inches/193 cm |
| Weight | 3814 lbs/1730 kg |
| Front tire | 9.5x16 |
| Rear tire | 14.9x24 |
ATTACHMENT OVERVIEW
| Description | Front-end loader/Backhoe |
RK TRACTORS L110 LOADER
| Loader weight | 1261 lbs/571 kg |
| Height (to pin) | 109.1 inches/277 cm |
| Clearance, dumped bucket | 80.8 inches/205 cm |
| Dump reach | 21.4 inches/54 cm |
| Dump angle | 45?/ |
| Reach at ground | 73.1 inches/185 cm |
| Rollback angle | 35?/ |
| Breakout force (at pin) | 4938 lbs/2239 kg |
| Lift to full height (at pin) | 2478 lbs/1124 kg |
| Bucket width | 72 inches/182 cm |
| Attachment style | quick coupler |
RK TRACTORS BH8.0 BACKHOE
| Backhoe type | RK Tractors BH8.0 Backhoe |
| Weight | 1500 lbs/680 kg *Without bucket |
| Transport height | 91.2 inches/231 cm |
| Bucket width | 9 inches/22 cm/12 inches/30 cm/16 inches/40 cm/18 inches/45 cm/24 inches/60 cm |
| 2-Foot flat digging depth | 103.2 inches/262 cm |
| Reach from pivot | 134.4 inches/341 cm |
| Loading height | 92.4 inches/234 cm |
| Bucket Rotation | 151 |
| Swing Arc | 180 |
| Bucket force | 4435 lbs/2011 kg |
| Dipperstick force | 2694 lbs/1221 kg |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 70 |
| Battery volts | 12 |