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Walker MD21D Out-Front Zero-Turn Ride On Mower (Mower Only) With 20.9HP Kubota D722 Three-Cylinder Diesel Engine

In stock (1 item available)
  • $31990.00AUD

Walker MD21D Out-Front Zero-Turn Ride On Mower (Mower Only) With 20.9HP Kubota Three-Cylinder Diesel Engine

Please contact us on 02 4655 5575 or for pricing on decks

A top-of-the-line Kubota tractor engine, providing long life and fuel economy, forms the core of the Model MD. The Model MD is a hard working, proven performer for commercial lawn mowing companies, industrial facilities and municipalities. 

  • 20.9-hp Kubota, 3 cylinder., liquid-cooled, 722cc diesel engine
  • Electric radiator fan with reversible, self-cleaning action
  • Clam-shell style body completely exposes drive train and engine
  • Shock-mounted instrument panel with warning lights and horn, also includes ignition switch, light switch, water temperature gauge, voltmeter and hourmeter
  • Remote engine air intake
  • Belt tightener clutch/band brake
  • 10.0 Bushel Catcher and 10.5" blower on GHS model
  • Designed for grass handling, side discharge or mulch decks up to 74"
  • Splined PTO drive shaft with Quick-Disconnect Coupler
  • 4.7 gallon fuel tank
  • Parking brake


Engine Specifications



Kubota D722, 3-Cylinder


44.0 cu. In. (722cc)


20.9 @ 3600

Max Torque [ft-lb (N’m) @ RPM]

34 (43.0) @ 2600


Diesel (2-D)

Fuel Capacity

4.7 Gallons (17.8 litres)

Cooling System

Liquid, Radiator

Lubrication System

Full Pressure with Filter


Engine Tuned (Lo Tone)

Electrical System



12 Volt (340 CCA)

Charging System

40-Ampv Automotive Alternator


Diesel with  Glow Plug


12 Volt Electric Key and Solenoid Operated

Interlock Switch System

Ignition Lockout by Seat Switch, Transmission Neutral & Blade Clutch

Tractor Drive


Transmission/Final Drive

Dual Hydrostatic Eaton Model 7, Each wheel independently driven


Hand Lever Control, Individual Drive Wheel

Forward Speed Control

Precision Friction Lock Lever, Cruise Control with Neutral Park Position


Dynamic Braking through Hydrostatic Transmissions

Parking Brake

Mechanical Pin Lock in Transmission Gear

Ground Speed

0-5 MPH (8 Kph) Infinitely Variable (Forward/ Reverse),                                 7.0 MPH w/ (11.2 Kph) Optional Kit

Turning Radius

Zero (0°)

Mower Deck


Cutting Width (Inches)

36-74 (15 Decks)

Cutting Height (Inches)

1 to 4 (2.54 to 10.16 cm), 1/2” (1.27 cm) Increments


0.197 inch Stamped Steel, 10B38 Alloy, Tempered

Maximum Blade Speed

2900 RPM (16700 FPM with 22” Blade)

Blade Drive

Splined PTO Drive Shaft/2 High Speed U-Joints, Shear Pin for Shock Protection on Times Gear Drive on Deck

Blade Clutch & Brake

Manual Belt Tightener/Band Brake

Deck Suspension

Torsion-Flex Fame with Caster Wheels and Counterweight Springs




All Welded Unitised Steel Frame/14 Gauge Steel Body Shell

Mower Deck

11 Gauge Welded Steel

GHS Catcher & Chutes

Molded cross-Linked Polyethylene (High Impact Material, UV Stabilised)


Grammer Suspension Seat with Armrests (Adjustable for Operator Weight)

Tire Size


Deck Caster Wheel

Standard 8 x 3 Pneumatic (4 Ply), Optional 8 x 3 Foamed Rubber


18 x 9.50-8

Rear Tire

11 x 4-5



Outside Dimensions*

44 in. (112 cm) H x 43 in. (109 cm) W x 88 in. (224 cm) L

Wheel Base (Tractor)

42-1/4 in. (102 cm)

Tread Width (Tractor)

29-3/4 in. (75 cm)

Curb Weight (Approx.)


SD Tractor Only

787 lbs. (357 kg)

GHS Tractor Only

932 lbs. (424 kg)

Tractor and Mower

1125 lbs. (510 kg)

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  • Weight
    100.0000 kg
  • SKU