Overview
The RK Tractors RK37H is a compact utility tractor manufactured by TYM and distributed by Rural King since 2017. It features a 37.4 hp Yanmar 1.6L 3-cylinder diesel engine paired with a three-range hydrostatic transmission and four-wheel drive. The mechanical configuration includes power steering, wet disc brakes, and a Category I rear hitch with a lift capacity of up to 2646 lbs at the ends.
Ideal Applications
Engine and PTO Specifications:
The liquid-cooled Yanmar engine utilizes common rail direct injection to produce 37.4 gross hp at 3000 RPM, delivering a claimed 28.8 hp through an independent electro-hydraulic rear PTO.
Hydraulic System and Hitch Capacity:
The tractor is equipped with a dual-pump hydraulic system providing 11 gpm total flow, supporting a rear Category I hitch rated for 1764 lbs at 24 inches and 2646 lbs at the ends.
Transmission and Chassis Layout:
The hydrostatic drivetrain provides infinite forward and reverse gears across three ranges, mounted on a 66.1-inch wheelbase with a total machine weight of 3106 lbs.
Production
| Description | Compact Utility tractor / Original price was $18,999 in 2017 |
|---|---|
| Distributor | RK Tractors (a part of Rural King) |
| Manufacturer | TYM |
Engine
| Engine type | Yanmar 1.6L 3-cyl diesel |
|---|---|
| Fuel tank | 9 gal (34.1 L) |
| Bore/Stroke | 3.39x3.54 inches (86 x 90 mm) |
| Description | Yanmar 3TNV88-CR / diesel / 3-cylinder / liquid-cooled |
| Displacement | 100.2 ci (1.6 L) |
| Fuel system | common rail direct injection |
| Power (gross) | 37.4 hp (27.9 kW) |
| Rated RPM | 3000 |
| Starter | electric |
| Starter volts | 12 |
| Engine (gross) | 37.4 hp (27.9 kW) |
| PTO (claimed) | 28.8 hp (21.5 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 | 6.4 gpm (24.2 lpm) |
|---|---|
| Steering flow | 4.6 gpm (17.4 lpm) |
| Total flow | 11 gpm (41.6 lpm) |
| Valves | 1 |
Hitch
| Control | position control |
|---|---|
| Rear lift (at 24"/610mm) | 1764 lbs (800 kg) |
| Rear lift (at ends) | 2646 lbs (1200 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 | 55 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Ground clearance | 12.8 inches (32 cm) |
|---|---|
| Height (ROPS) | 94.5 inches (240 cm) |
| Length | 126 inches (320 cm) |
| Weight | 3106 lbs (1408 kg) |
| Wheelbase | 66.1 inches (167 cm) |
| Width | 53.5 inches (135 cm) |
| Front tire | 7-16 |
| Rear tire | 11.2x24 |
| Weight | 3106 lbs (1408 kg) |
| Wheelbase | 66.1 inches (167 cm) |
| Industrial front | 10-16.5 |
| Industrial rear | 43x16-20 |
| Lawn/turf front | 28x8.5-15 |
| Lawn/turf rear | 41x14-20 |
| Standard tires (ag) | Front: 7-16. Rear: 11.2x24 |
RK Tractors RK37H attachments
| Description | front-end loader / backhoe |
|---|
References
| Description | RK55 Hydrostatic Operator's Manual published in 2018 |
|---|
Variants
| RK37H | hydrostatic ROPS |
|---|---|
| RK37HC | hydrostatic cab |
| RK37S | shuttle ROPS |
| RK37SC | shuttle cab |