RK Tractors RK37S

The RK Tractors RK37S is a tractor produced by Rk Tractors. It is equipped with a 100.2 ci 1.6 L engine. The listed engine power is Diesel (gross): 37.4 hp / 27.9 kW. Transmission: 12 forward and reverse. Operating weight: 1340 lbs*Without bucket 607 kg.

Engine Power

Diesel (gross): 37.4 hp / 27.9 kW

Fuel & Capacities

9 gal 34.1 L

Transmission

12 forward and reverse

Operating Weight

1340 lbs*Without bucket 607 kg

Overview

	2017 - Compact Utility tractorTYM built
2017 -
Compact Utility tractor
TYM built

2017 -
Compact Utility tractor
TYM built

Production
Distributor	RK Tractors (a part of Rural King)
Manufacturer	TYM
Compact Utility tractor
Original price was $16,999 in 2017

Variants
RK37S	shuttle ROPS
RK37H	hydrostatic ROPS
RK37SC	shuttle cab
RK37HC	hydrostatic cab

RK Tractors RK37S Engine
Yanmar 1.6L 3-cyl diesel
Fuel tank	9 gal 34.1 L
Engine details ...

RK Tractors RK37S Transmission
12-speed syncro shuttle
Transmission details ...

RK Tractors RK37S Power
Engine (gross)	37.4 hp 27.9 kW
PTO (claimed)	30.2 hp 22.5 kW

Mechanical
Four-wheel drive
Power steering
Wet disc brakes
Two-post ROPS.

Hydraulics
Valves	1
Pump flow	6.4 gpm 24.2 lpm
Total flow	11 gpm 41.6 lpm
Steering flow	4.6 gpm 17.4 lpm

Tractor hitch
Rear Type	I
Control	position control
Rear lift (at ends)	2646 lbs 1200 kg
Rear lift (at 24"/610mm)	1764 lbs 800 kg

Power Take-off (PTO)
Rear PTO	independent
Clutch	electro-hydraulic
Rear PTO Type	540 (1.375)

Dimensions & Tires
Wheelbase	64.5 inches 163 cm
Weight	3065 lbs 1390 kg
Front tire	7-16
Rear tire	11.2x24
Full dimensions and tires ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	55
Battery volts	12

References

RK55 Shuttle Operator's Manual published in 2018

Engine

	2017 - Compact Utility tractorTYM built
2017 -
Compact Utility tractor
TYM built

2017 -
Compact Utility tractor
TYM built

Engine Detail — 100.2 ci / 1.6 L Diesel

Manufacturer	Yanmar 3TNV88-CR
Fuel Type	Diesel
Configuration	3-cylinder, liquid-cooled
Displacement	100.2 ci 1.6 L
Bore/Stroke	3.39x3.54 inches 86 x 90 mm
Power (gross)	37.4 hp 27.9 kW
Fuel system	common rail direct injection
Rated RPM	3000
Starter	electric
Starter volts	12

Transmission

	2017 - Compact Utility tractorTYM built
2017 -
Compact Utility tractor
TYM built

2017 -
Compact Utility tractor
TYM built

Transmission — 12 forward and reverse syncro shuttle

Type	syncro shuttle
Gears	12 forward and reverse

Dimensions

	2017 - Compact Utility tractorTYM built
2017 -
Compact Utility tractor
TYM built

2017 -
Compact Utility tractor
TYM built

RK Tractors RK37S Tires
Standard tires (ag)	Front: 7-16. Rear: 11.2x24
Lawn/turf front	28x8.5-15
Lawn/turf rear	41x14-20
Industrial front	10-16.5
Industrial rear	43x16-20

Dimensions
Wheelbase	64.5 inches 163 cm
Length	126 inches 320 cm
Width	53.5 inches 135 cm
Height (ROPS)	94.5 inches 240 cm
Weight	3065 lbs 1390 kg
Ground clearance	12.8 inches 32 cm

Attachments

	2017 - Compact Utility tractorTYM built
2017 -
Compact Utility tractor
TYM built

2017 -
Compact Utility tractor
TYM built

Attachment overview
Front-end loader
Backhoe

RK Tractors BH7.5 Backhoe
Backhoe type	RK Tractors BH7.5 Backhoe
Weight	1340 lbs*Without bucket 607 kg
Transport height	85.2 inches 216 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	91.2 inches 231 cm
Reach from pivot	123.6 inches 313 cm
Loading height	90 inches 228 cm
Bucket Rotation	149°
Swing Arc	180°
Bucket force	4554 lbs 2065 kg
Dipperstick force	2530 lbs 1147 kg

Photos

RK Tractors RK37S tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Rk Tractors RK37S based on its 37.4 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm)	Medium Duty	Standard utility farm tillage.
Rotary Cutter / MowerMowing & Clearing	5 ft (60 in)1.5 m	Medium Duty	Pasture maintenance and weeds up to 1.5" diameter.
Rotary TillerSeedbed Prep	54 to 60 in135 - 150 cm	Medium Duty	Thorough seedbed preparation in orchards and vegetable plots.
Disc HarrowSecondary Tillage	5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片)	Light Duty	Small acreage soil break-up and secondary aeration.
Hay BalerHay & Forage	Small Square Baler (14x18")小方捆打捆机 (36x46 cm)	Medium Duty	Classic 2-string baler for horse and small livestock hay.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Rk Tractors RK37S.

Estimated Continuous Field Runtime: 4.6 hrs

Approximately 4.6 hours of continuous field operation at ~75% rated power on a full tank (9 gal / 34.1 L).

Estimated 75% Load Fuel Burn~1.9 gal/hr (7.4 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours