Bush Hog® HDZ-4 Professional Series ZT Mower

Limited Availability


  • Robotically Welded 7GA Steel Decks
  • ZT-5400™ Dual Transaxles from Hydro-Gear®
  • Full Feature Control Module
  • Keyless Start/Stop
  • Soft Start PTO
  • Center-Mounted 8 Gallon Fuel Tank
  • Patent-Pending Rotary Controlled Deck Height Adjustment
  • NEW Patent-Pending Front Suspension
  • Full Suspension, High-Back Custom Embroidered Seat
HDZzt4 product
Notes: Unit shown equipped with certain selections and options. Please consult with your local Bush Hog dealer for all available configurations.

Product Features

  • 55″, 61″ and 73″ Deck Widths
  • Engine Selections from Kohler and Kawasaki up to 38HP
  • Full Suspension, High-Back Custom Embroidered Seat
  • Patent-Pending Rotary Controlled Deck Height
  • Full Feature Control Module
  • Hydro-Gear® ZT-5400™ Dual Transaxles
  • 24 x 12-12 Radial/Bar Drive Tires
  • US Forestry Service Approved Spark Arrestors
  • Steering Handle Tracking Adjustment
  • NEW Patent-Pending Front Suspension

Construction Features

  • Robotically Welded 7GA Steel Deck
  • 2″ x 2.5″ Welded Steel Frame
  • Center-Mounted 8 Gallon Fuel Tank

Safety Features

  • Safety Interlock Indicators: PTO Engagement, Parking Brake, Steering Handles, Operator Presence
  • 3″ Diameter Round Foldable ROPS

Product Features

hdezt4 electronic

Full feature electronic control module offers keyless start/stop, system monitoring and Soft Start PTO engagement to protect drive train components.

Front Suspension

Bush Hog®’s NEW Patent-Pending Front Suspension decreases the shock from uneven turf to allow more rider comfort, decrease rider stress and extend the unit’s life due to reduced frame vibrations..


8 gallon under the seat fuel tank for improved weight distribution, lower center of gravity, improved ride and protection from impact/damage.

hdezt4 spark

Spark arrestors standard on all models. Units approved for use on US Forest Service Land.


LED Light provides the illumination for cutting in those dimly lit areas and into the evening hours, as well as, loading/unloading from an enclosed trailer.


hdezt4 chair

Deluxe High-Back, Full Suspension Seat with flip-up armrests, operator weight adjustment, fore and aft adjustment, and custom embroidered Bush Hog® Logo.

hdczt4 deck

Robotically welded, heavy duty 7GA steel cutting deck in widths of 49″, 55″ and 61″. (The same grade steel used on Bush Hog®’s heavy duty flex-wing cutters!)

hdczt4 led

Patent-pending rotary height-of-cut adjustment with transport lock on HDC/ HDZ models, pin out height selection on HDE models.

hdzzt4rearbumper copy

Rear bumper with hitch to protect the engine and provide a connection point for optional accessories.

hdczt4 molded

Injection molded fenders with reinforcing ribs; molded in beverage holder and storage tray.

Good for Tractors rated 40hp or under


Deck Size
55”, 61” and 73”
Engine Options
Kawasaki FX921, Kohler EFI Command Pro
Drive System
Hydro-Gear® ZT-5400™ Dual Transaxles
Front Axle
Hydraulic Braking, Disc-Type Parking Brake
Steering Motor Control
Dampened Twin Levers, Adjustable Fore, Aft and Vertically, Steering Handle Tracking Adjustment
Front Caster Tires
13 x 6.5-6 – 4-Ply Tubeless
Drive Tires
24 x 12-12 Radial or Bar Type
Infinitely Variable 0-14 mph Forward, 0-4 mph Reverse
Blade Tip Speed
18,000 fpm
Full Feature Electronic Control Module w/Keyless Start, System Monitoring, Safety Interlock Controls, Soft-Start PTO Engagement and LED Light Control
System Monitoring
Electronic Fuel Level, Low Fuel and Low Oil Indicators, Tachometer and Hourmeter
Safety Interlock Controls
PTO Engagement, Parking Brake, Steering Handles and Operator Presence
Molded-in Large Beverage Holder and Storage Tray, Tethered Gas Cap, Dual USB Charging Port, Electronic Control Module, LED Lights, Patent-Pending Front Suspension
Electromagnetic Clutch Rated at 200 ft lbs
Fuel Tank
8-Gallon Center Mounted Tank with Single, Wide mouth Fill Point
Standard Seat
Deluxe High-Back, Vinyl Full-Suspension Seat with Flip-Up Armrests, Operator Weight Adjustment, Fore and Aft Adjustment, Custom Embroidered Bush Hog® Logo
Deck Construction
7-Gauge Reinforced, Robotically Welded Steel
Deck Lift
Patent-Pending Rotary Dial Height Adjustment with Transport Lock
(3) 0.204 Inch Thick, Heat-Treated High Alloy Steel
Cutting Height
1-1/2″ to 5″, Adjustable in 1/4″ Increments
Certified Operator Presence and Safety Interlock Controls, 3” Diameter Round Foldable ROPS and Seat Belt
12 Volt, Rated 350 CCA




Privacy Preference Center