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Toro Groundsmaster 5900 Series Ride-on Mowers

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Tasked with maintaining more parks and sports fields with no additional workers or budget? Is it possible to do more with less? The Groundsmaster 5900 Tier 4 series proves beyond doubt that increased efficiency and ease of operation lead to higher productivity and low daily operating costs. The Groundsmaster 5900 Series mowers can mow over 17 acres/hour using only one operator! The Groundsmaster 5900 series is loaded with intelligence and innovative features. The comfort and safety of an optional all season cab, the incredibly nimble handling and tough durability, makes this machine the perfect solution for large area mowing.

  • 192 in (488 cm) width of cut, mows 100+ acres per day.
  • 3.3 L Yanmar® EPA Tier 4 Final and EU Stage IV emissions compliant turbo-diesel engine.
  • Full-time, bi-directional 4WD.
  • CrossTrax® all-wheel drive system offers increased cross wheel traction control.
  • SmartPower™ allows the operator to effortlessly maintain the correct speed for optimal cutting.

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SmartCool™ System With Auto-Reversing Cooling Fan

Variable speed, temperature actuated reversing fan. Blows chaff off intake screen to help reduce overheating. Big time saver which reduces that amount of times an operator has to stop and exit the unit to clean the back hood.

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Operator Comfort

The operator area of the Groundsmaster® 5900 was designed to make work more comfortable with amenities like a large operator platform, multi-size beverage holder, 12-volt power jack on control arm, personal storage box, storage slots for radio and phone, deluxe seat, portable radio holder, tilt steering, and air ride seat. Operators will also be pleased with the additional storage area behind the seat that’s large enough for a water cooler, trash bucket, and other items.

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Biodiesel ready up to B-20.

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Smart Power™ Traction

Smart Power Traction allows even an inexperienced operator to achieve a consistent cut, even on hills and thick patches. By automatically adjusting ground speed when encountering heavy cutting conditions, optimum blade speed is maintained.

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With the all-new InfoCenter™, you get helpful maintenance reminders and instant notification of potential problems. It’s like having a mechanic on board.

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Mow closely around trees and other obstacles with zero trim. You can also turn 180° and leave no uncut grass.

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To mow between objects or along narrower areas, operators may raise either left or right wing decks (142″ (3.6 m) width of cut) as well as both decks (92″ (2.3 m) width of cut). The cutting units can be set from 1-6″ (2.5-15.2 cm) to handle a wide variety of conditions.

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Mowing Capacity

The 5900/5910 Series is all about covering maximum ground. With the cutting decks down, you get a full 16′ (4.9 m) cut capable of mowing more the 100 acres (40.5 hectares) per day.

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Wing Decks: Bi-directional Impact Absorption System

If the operator misjudges distance, the unique, bi-directional impact absorption system helps prevent damage and costly repairs. A massive spring-loaded shock cushions the decks away from the object.

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The full-time, 4-wheel drive puts power where it’s needed. The cutting decks automatically take weight off the cutting units for more flotation, and put it on the traction wheels when climbing hills. Individual wheel brakes and 4WD flow divider can be used to provide additional traction assistance.


The Groundsmaster® 5900 Series mowers can mow over 17 acres/hour (6.87 hectares/hour) using only one operator. And to match the 4.87 m wide mowing brawn and a more fuel-efficient EPA Tier 4 Final and EU Stage IV emissions compliant Yanmar® 3.3 L engine, the Groundsmaster 5900 series is loaded with intelligence. SmartPower™ allows the operator to effortlessly maintain the correct speed for optimal cutting, while the SmartCool™ system prevents over-heating with auto-reversing the cooling fans. An onboard InfoCenter™ gives the operator a quick read on all systems and even provides assistance at the right moment. When the comfort and safety of an all season cab, the incredibly nimble handling, and tough Toro durability are added in, the new Groundsmaster 5900 series proves beyond doubt that increased efficiency and ease of operation lead to higher productivity.

  • Engine: Yanmar® 3.3L turbo diesel 72 hp (53.7 kW)
  • Fuel Capacity: 35 gal. (132L)
  • Mowing Speed: 0-10.8 mph (17.4km/h)
  • Transport Speed: 0-20 mph (0-32.2 km/h)
  • Cutting Width:192 in (488 cm)
  • Weight: Approx. 6,710 lbs. (3,043 kg)
  • Warranty: Two year limted warranty



Additional information



Product Video

Brochures, Parts & Manuals

View and download documentation for this item.

  • 2023-24 Toro Performance Parts Quick Reference Guide (Full Brochure)

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  • Blades Reference Chart – Toro Groundsmaster®

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Why choose Toro? 100 Years of Excellence

With roots dating back to 1914, The Toro Company was built on a tradition of quality and caring relationships. Today, the company is a leading worldwide provider of innovative solutions for the outdoor environment including turf and landscape maintenance, snow and ice management, underground utility construction, rental and specialty construction, and irrigation and outdoor lighting solutions. Through a strong network of professional distributors, dealers, rental stores and retailers in more than 125 countries, we proudly offer a wide range of products across a family of global brands to help golf courses, professional contractors, underground construction professionals, groundskeepers, agricultural growers, rental companies, government and educational institutions, and homeowners – in addition to many leading sports venues and historic sites around the world.

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