Overview
The RK Tractors RK55H is a compact utility tractor manufactured by TYM and distributed by Rural King, in production since 2017. It is equipped with a 55.1 hp Yanmar 2.1L four-cylinder turbocharged diesel engine and a three-range hydrostatic transmission. The machine features four-wheel drive, a 3,814-pound operating weight, and a Category I rear hitch with a 2,945-pound lift capacity at 24 inches.
Ideal Applications
Engine and Power Output:
The tractor utilizes a Yanmar 4TNV86T-CR liquid-cooled diesel engine with common rail direct injection, producing 55.1 gross horsepower and 42.2 claimed PTO horsepower at 2800 RPM.
Transmission and Mechanical Configuration:
The drivetrain consists of a hydrostatic transmission with infinite forward and reverse gears across three ranges, supported by an electro-hydraulic independent rear PTO.
Hydraulic and Hitch Specifications:
The hydraulic system delivers a total flow of 14.5 gpm through two valves, providing 2,945 lbs of lift at 24 inches and 3,314 lbs at the hitch ends.
Production
| Description | Compact Utility tractor / Original price was $23,799 in 2017 |
|---|---|
| Distributor | RK Tractors (a part of Rural King) |
| Manufacturer | TYM |
Engine
| Engine type | Yanmar 2.1L 4-cyl diesel |
|---|---|
| Fuel tank | 17 gal (64.3 L) |
| Bore/Stroke | 3.39x3.54 inches (86 x 90 mm) |
| Description | Yanmar 4TNV86T-CR / turbocharged diesel / 4-cylinder / liquid-cooled |
| Displacement | 127.6 ci (2.1 L) |
| Fuel system | common rail direct injection |
| Power (gross) | 55.1 hp (41.1 kW) |
| Rated RPM | 2800 |
| Starter | electric |
| Starter volts | 12 |
| Engine (gross) | 55.1 hp (41.1 kW) |
| PTO (claimed) | 42.2 hp (31.5 kW) |
Transmission
| Description | hydrostatic |
|---|---|
| Gears | infinite forward and reverse (3-range) |
| Type | hydrostatic |
Mechanical
| Description | Power steering / Wet disc brakes / Two-post ROPS. |
|---|---|
| Drive type | Four-wheel drive |
Hydraulics
| Pump flow | 9.5 gpm (36.0 lpm) |
|---|---|
| Steering flow | 5 gpm (18.9 lpm) |
| Total flow | 14.5 gpm (54.9 lpm) |
| Valves | 2 |
Hitch
| Control | position and draft control |
|---|---|
| Rear lift (at 24"/610mm) | 2945 lbs (1335 kg) |
| Rear lift (at ends) | 3314 lbs (1503 kg) |
| Rear Type | I |
PTO
| Clutch | electro-hydraulic |
|---|---|
| Mid PTO | Optional |
| Rear PTO | independent |
| Rear PTO Type | 540 (1.375) |
Electrical
| Battery volts | 12 |
|---|---|
| Charging amps | 70 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Ground clearance | 13.8 inches (35 cm) |
|---|---|
| Height (ROPS) | 102.1 inches (259 cm) |
| Length | 141.3 inches (358 cm) |
| Weight | 3814 lbs (1730 kg) |
| Wheelbase | 76.2 inches (193 cm) |
| Width | 63.8 inches (162 cm) |
| Front tire | 9.5x16 |
| Rear tire | 14.9x24 |
| Weight | 3814 lbs (1730 kg) |
| Wheelbase | 76.2 inches (193 cm) |
| Industrial front | 12x16.5 |
| Industrial rear | 16.9x24 |
| Lawn/turf front | 12x16.5 |
| Lawn/turf rear | 16.9x24 |
| Standard tires (ag) | Front: 9.5x16. Rear: 14.9x24 |
RK Tractors RK55H attachments
| Description | front-end loader / backhoe |
|---|
References
| Description | RK55 Hydrostatic Operator's Manual published in 2017 |
|---|
Variants
| RK55H | hydrostatic ROPS |
|---|---|
| RK55HC | hydrostatic cab |
| RK55S | shuttle ROPS |
| RK55SC | shuttle cab |