• One Groundsmaster 5900 has the equivalent production of two 11 ft (3.4m) mowers or four 6 ft (1.8m) out front rotaries.
• We designed this machine to be powerful, yet energy efficient.
• Ductile cast iron spindle housing is large in diameter [9 in. (229 mm) at the base] to dissipate impact loads. Dual tapered roller bearings last up to six times longer than ball bearings.
4-way adjustable seat and air-ride suspension isolate the operator platform to reduce noise and vibration.
• The ability to mow a 0" (0 cm) uncut circle - without wheel brakes - allows you to easily mow striping patterns without leaving any grass uncut.
• The onboard InfoCenter™ gives the operator a quick read on all systems and even provides assistance at the right moment.
3.3L (202cu. in.) Yanmar Tier 4 Final Compliant turbo-diesel engine, 72 HP (53.7kW) @2500 rpm, 206 lb. ft. (279 Nm) torque @1625 rpm, B20 diesel compatible.
• With the ability to mow widths ranging from 57" (145 cm) to 192" (487 cm) the Groundsmaster 5900 has the flexibility necessary for nearly any mowing need.
• Automatically adjusts the mower’s ground speed for the cutting conditions.
• Belts transfer power more efficiently than hydraulic motors while adding a layer of protection against hydraulic failures. Large diameter spindle housing dissipates impact loads, and dual tapered roller bearings last up to six times longer than ball bearings.
The SmartCool™ system prevents over-heating with auto-reversing cooling fans.
CrossTrax® all-wheel drive system offers increased cross wheel traction control.

Specifications
Armrests: Standard
Battery: 12V
Blade Style/Type: Rotary
Blade Type (Description): 20" (50.8 cm) heat-treated steel blades
Cab Unit: N/A
Controls: Control arm, right armrest, travels with seat and suspension. Deck lift/lower, electrohydraulic switches. Throttle; electronic, variable. Traction pedal, electronic. Park brakes: double-motion switch. Steering; hydrostatic load sensing.
Cooling System Description: 24V dual electric fan banks for separate engine radiator and hydraulic oil cooling; fan banks are variable speed and have auto-reverse, radiator is cross flow, 3 rows, 9 FPI. Hydraulic oil cooler is crossflow, 6 FPI.
Cup Holder: Standard
Cutting Unit Accessories: Atomic™ Mulching Blades, Flat Blades
Cutting Unit Type/Configuration: Three rear discharge rotary decks. All three decks: 192" (488 cm), One wing: 57" (145 cm), center deck: 92" (234 cm), center deck + one wing: 144" (366 cm)
Deck Construction: 11-gauge high-strength steel. 7-gauge, reinforcements, bullnose bumpers.
Deck Wing Protection: 2-way shock absorption on wing decks
Drivetrain: Diesel
Electrical System: Main: 12 volt system; Alternator: 12V, 80 amp, supplied w/ engine Battery: 1380 CCA (2x 690 CCA), Cooling Fans, Engine/Hydraulic cooling: 24 volt system; Alternator: 24V, 105 amp w/ remote sense; Battery: 350 CCA; Disconnect ON/OFF switch for 12 & 24 volt service safety.
Engine Cooling: Liquid Cooled
Fuel / Power Source: Diesel / Biodiesel
Fuel Capacity: 35 U.S. gal. (132.5 L)
Gauges/Instrumentation: InfoCenter™: Shows gauges, service reminders, advisories/faults and troubleshooting assistance. Shows fuel level, coolant temp, hydraulic oil temp, engine glow plug, low oil pressure, air cleaner restriction, 12V & 24V alternator output, engine hours, rpm and DPF regeneration.
Ground Clearance: 10.3" (26.1 cm)
Ground Speed - Forward: 0 - 20 mph (0 - 32.2 km/h)
Ground Speed - Reverse: 0 - 10.5 mph (0 - 16.9 km/h)
Height: 85" (216 cm)
Height of Cut Range: 1" - 6“ (2.5 cm - 15 cm) in 0.5" (1.3 cm) increments
Hydraulic Fluid Capacity: 19 U.S. gal. (71.9 L)
Hydraulic Fluid Type: Toro PX™ Extended Life Hydraulic Fluid
Implement Drive: HybridDrive™ - Hydraulic motor to spindle, remaining spindle(s), driven by “B” section v-belts with automatic, spring loaded idlers
IntelliDash™ Capable: No
Lighting: Standard
Main Frame/Chassis: All welded formed-steel frame with integral tie-down anchors
Max Slope Angle: Refer to operator's manual
Mowing Rate (Productivity): Up to 20.9 acres/hr (8.5 hectacres/hr)
Mowing Speed: 0 - 10.8 mph (0 - 17.4 km/h)
Number of Blades: 11
Oil Capacity: 11 U.S. qt. (10.4 L)
Oil Cooler Description: Crossflow, hydraulic oil cooler @ 6 FPI.
Operator Area: Storage box, cup holder, 12-volt power outlet, double USB port
Optional Accessories: Two-post ROPS Extension System, Red Sunshade, White Sunshade, Rotating Beacon Kit, Work Light Kit, Additional Turn Signals, Horn, Backup Alarm, Auxiliary Braking System
Overall Width:199" (505 cm)
Parking/Service Brakes: Parking: Electrohydraulic controlled via double-motion rocker switch. Service: Dynamic, hydrostatic 4WD in low range. Front wheel drive braking in high range.
Power Steering: Yes
Power Train (Engine Description): 3.3 L Yanmar® EPA Tier 4 Final and EU Stage IV emissions compliant turbo-diesel engine. 72 HP (53.7 kW) @ 2500 rpm, Torque: 206 ft.-lbs. (279 Nm) @ 1625 rpm Displacement: 202 cu. in. (3.3 L).
Product Length: 174" (442 cm)
Reel/Cylinder Drive: Hydraulic
Safety/Operator Safety: LED headlights, brake lights, tail lights, amber turn signals and flashers
Seat: 4 -way adjustable seat with vinyl cushions. Air ride suspension with 3" (7.6 cm) of adjustability.
Spindle Assembly: Shaft: 1.25" (3.2 cm) hardened steel. Housing: 9” (22.9 cm) ductile iron. Bearings: Greaseable tapered roller.
Starting: Key Start
Steering System Description: Power steering with dedicated power source. Steering wheel tilts to desired operator position.
Tires - Front: 29" x 12" - 15", 6-ply
Tires - Rear: 23" x 10.5" - 12", 6-ply
Tool Box: Standard
Traction Drive: 4WD
Traction Drive (System): Full time automatic forward and reverse 4WD in low (mow) range. Front drive: 2-speed, fixed displacement high torque, low speed radial piston motors. Rear drive: single speed, fixed displacement, high torque, low speed radial piston motors.
Transport Width: 99" (251 cm)
Turning Circle (Diameter): Uncut circle - 0" diameter. Turning radius - 86" (218 cm)
Weight: 6,710 lbs. (3043 kg) with full fluids
Wheelbase: 77" (196 cm)
Width of Cut: 192" (488 cm)