| Manufacturer | RK Tractors |
| Price | 26,799(USD) |
| Model | RK55HC |
| Equipment Type | Compact Utility Tractors |
| Factory |
RK TRACTORS RK55HC POWER
| Engine (gross) | 55.1hp / 41.1kW |
| PTO (claimed) | 42.2hp / 31.5kW |
ENGINE DETAIL
The RK Tractors RK55HC is powered by a Yanmar 4TNV86T-CR turbocharged diesel engine with a displacement of 127.6ci (2.1L), providing a gross power output of 55.1hp at a rated RPM of 2800, which ensures robust performance for various agricultural tasks. The common rail direct injection fuel system enhances fuel efficiency and optimizes combustion, contributing to lower emissions and better torque delivery across different RPMs. Key advantages include reliable liquid-cooling for consistent engine performance and an electric starter for easy ignition, although users should be mindful of maintenance requirements inherent to turbocharged engines.
| Description | Yanmar 4TNV86T-CR turbocharged diesel 4-cylinder liquid-cooled |
| Displacement | 127.6ci / 2.1L |
| Bore/Stroke | 3.39x3.54inches / 86 x 90mm |
| Power (gross) | 55.1hp / 41.1kW |
| Fuel system | common rail direct injection |
| Rated RPM | 2800 |
| Starter | electric |
| Starter volts | 12 |
RK TRACTORS RK55HC ENGINE
The RK Tractors RK55HC features a Yanmar 2.1L 4-cylinder diesel engine, providing robust performance suited for heavy-duty tasks. Its 17-gallon (64.3L) fuel tank offers extended operational time, reducing downtime for refueling during long workdays. However, the compact engine size may limit power output in extreme conditions, necessitating careful load assessments for optimal efficiency.
| Description | Yanmar 2.1L 4-cyl diesel |
| Fuel tank | 17gal / 64.3L |
TRANSMISSION
The RK55HC tractor features a hydrostatic transmission with infinite (3-range) forward and reverse gears, providing operators with seamless speed control and enhanced maneuverability, essential for tasks requiring precise ground speed adjustments. The hydrostatic system allows for smooth transitions between speeds without the need for clutch operation, reducing operator fatigue during prolonged use. However, hydrostatic systems can be less efficient than traditional gear-driven systems in certain high-torque applications, so ensure compatibility with intended heavy-duty tasks to maximize performance.
| Type | hydrostatic |
| Gears | infinite (3-range) forward and reverse |
MECHANICAL
The RK55HC tractor features a 4x4 MFWD (mechanical four-wheel drive) system, providing enhanced traction on varied terrains, particularly beneficial for agricultural tasks requiring stability in wet or uneven conditions. Its hydrostatic transmission allows for seamless power delivery and easy speed adjustments, ideal for operators needing precise control during fieldwork. The inclusion of wet disc brakes improves braking performance and reduces maintenance frequency, making it a reliable choice for prolonged use.
| Chassis | 4x4 MFWD 4WD |
| Steering | power |
| Brakes | wet disc |
| Cab | Cab standard with air-conditioning and audio system. |
| Transmission | hydrostatic |
HYDRAULICS
| Valves | 2 |
| Pump flow | 9.5gpm / 36.0lpm |
| Total flow | 14.5gpm / 54.9lpm |
| Steering flow | 5gpm / 18.9lpm |
TRACTOR HITCH
| Rear Type | I |
| Control | position and draft control |
| Rear lift (at ends) | 3314lbs / 1503kg |
| Rear lift (at 24 | 2945lbs / 1335kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | electro-hydraulic |
| Rear RPM | 540 (1.375) |
| Mid PTO | Optional |
RK TRACTORS RK55HC TIRES
The RK55HC tractor is equipped with versatile tire options, including standard agricultural tires (9.5x16 front and 14.9x24 rear) that enhance traction in fieldwork scenarios. Optional lawn/turf and industrial tires (12x16.5 front and 16.9x24 rear) are advantageous for varying applications, providing better ground protection and stability on lawns or hard surfaces. When selecting tire configurations, consider the primary use case to optimize performance, as turf tires minimize soil compaction while industrial tires boost load-carrying capacity.
| 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 | 76.2inches / 193cm |
| Length | 141.3inches / 358cm |
| Width | 63.8inches / 162cm |
| Height (cab) | 99.6inches / 252cm |
| Weight | 4233lbs / 1920kg |
| Ground clearance | 13.8inches / 35cm |
DIMENSIONS & TIRES
The RK55HC tractor's 76.2-inch wheelbase provides a stable platform for various agricultural tasks, enabling improved maneuverability in tight spaces. Weighing 4,233 lbs, its robust structure contributes to greater traction and stability, especially while operating heavy implements. However, the tire specifications, with a front size of 9.5x16 and a rear size of 14.9x24, may limit flotation in softer soils, requiring careful consideration in wet conditions.
| Wheelbase | 76.2inches / 193cm |
| Weight | 4233lbs / 1920kg |
| Front tire | 9.5x16 |
| Rear tire | 14.9x24 |
ATTACHMENT OVERVIEW
| Description | Front-end loader/Backhoe |
RK TRACTORS L110 LOADER
| Loader weight | 1261lbs / 571kg |
| Height (to pin) | 109.1inches / 277cm |
| Clearance, dumped bucket | 80.8inches / 205cm |
| Dump reach | 21.4inches / 54cm |
| Dump angle | 45° |
| Reach at ground | 73.1inches / 185cm |
| Rollback angle | 35° |
| Breakout force (at pin) | 4938lbs / 2239kg |
| Lift to full height (at pin) | 2478lbs / 1124kg |
| Bucket width | 72inches / 182cm |
| Attachment style | quick coupler |
RK TRACTORS BH8.0 BACKHOE
| Backhoe type | RK Tractors BH8.0 Backhoe |
| Weight | 1500lbs / 680kg |
| Transport height | 91.2inches / 231cm |
| Bucket width | 9inches / 22cm 12inches / 30cm 16inches / 40cm 18inches / 45cm 24inches / 60cm |
| 2-Foot flat digging depth | 103.2inches / 262cm |
| Reach from pivot | 134.4inches / 341cm |
| Loading height | 92.4inches / 234cm |
| Bucket Rotation | 151 |
| Swing Arc | 180 |
| Bucket force | 4435lbs / 2011kg |
| Dipperstick force | 2694lbs / 1221kg |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 70 |
| Battery volts | 12 |