The ZT-3400 unitized hydrostatic transmission provides forward mowing speeds up to 10 mph (16.1 km/h). The transmission features heavy-duty wheel motors, charge pumps, exceptional cooling, and convenient access to check and fill hydraulic oil. Large, 24-inch (61 cm) rear tires feature a premium tread and contoured shoulder to help reduce turf compaction. Optional Michelin X® TWEEL™ Turf Airless radial tires eliminate flats, so you can stay running.

Each 7Iron™ PRO deck is forged from a single sheet of 7-gauge steel for commercial-grade durability. A smooth underside and 5.5-inch (140 mm) depth helps prevent material buildup while providing excellent airflow for efficient grass processing. Thoughtfully placed anti-scalp wheels help maintain consistent cutting over uneven terrain while making it easier to climb curbs. Includes aircraft-grade cast aluminum spindle housings with reinforced ribbing for durability that stands up to daily use.

Find your ideal operating position with an adjustable seat, steering levers, and foot platform. The seat features our ComfortGlide™ fore-and-aft suspension for exceptional ride comfort on uneven ground. Easy-to-use controls are conveniently located next to the seat, and a digital display helps you keep track of machine hours and system alerts. For convenient sit-and-go operation, the parking brake is built into the steering levers, so you can simply pull the levers in to start mowing and push them out to park.

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Engine Power | 20.1 kW |
Engine Power | 27 hp |
Engine Model Number | FX850V |
Displacement | 852 cc |
Displacement | 52 cu in. |
Cylinders | V-twin |
Lubrication | Full pressure with replaceable filter |
Lubrication | 2.3 L |
Lubrication | 2.4 U.S. qt |
Type | Overhead valve |
Battery Voltage | 12 V |
Battery Cold Crank Amps | 300 CCA |
Choke/Speed Control | Separate control levers |
Cooling Method | Air |
Fuel Tank Capacity | 30.2 L |
Fuel Tank Capacity | 8 U.S. gal. |
Fuel Gauge | Fuel level sight line |
Dual Hydros | Hydro-Gear ZT3400™ with 1.125-in. (28.6-mm) axles |
Forward Speed | 16.1 km/h |
Forward Speed | 10 mph |
Reverse Speed | 7.2 km/h |
Reverse Speed | 4.5 mph |
Speed And Direction Control | Twin premium levers |
Control Adjustment | 2-height/18 positions |
Frame | Heavy-duty frame tubing |
Primer/Paint | E-coat/powder |
Front Caster Tires | 13x6.5-6 |
Front Caster Bearings | Sealed ball bearings |
Drive Tires | 24X12-12; Optional - 24X12N12 Michelin® Tweel® X Turf Airless Radial |
Hour Meter | Yes, with low oil pressure, warning, service maintenance, and operator presence indicators |
Service Interval Decal | Yes |
Storage Compartment | Yes |
Cup Holder | Yes |
Seat Back Height | 61 cm |
Seat Back Height | 24 in. |
Fore-Aft Adjustment | 10.2 cm |
Fore-Aft Adjustment | 4 in. |
Seat Suspension | Mechanical; adjustable for weight with ComfortGlide™ fore-and-aft suspension |
Type | Spring assisted foot lift |
Mower Cut Height - Minimum | 3.8 cm |
Mower Cut Height - Minimum | 1.5 in. |
Mower Cut Height - Maximum | 12.7 cm |
Mower Cut Height - Maximum | 5 in. |
Cut Height Increments | 0.64 cm |
Cut Height Increments | 0.25 in. |
Preset Cut Height | Yes |
Cutting Width | 137/152 cm |
Cutting Width | 54/60 in. |
Type | 7Iron™ PRO side discharge |
Mower Deck Material | 7 gauge |
Mower Deck Material | 4.6 mm |
Mower Deck Material | 0.179 in. |
Mower Drive System | V-belt |
Type | Electric |
Type | 169 Nm |
Type | 125 lb-ft |
Drive | V-belt |
Wheelbase | 126.7 cm |
Wheelbase | 49.9 in. |
Overall Length | 204.6 cm |
Overall Length | 80.6 in. |
Width Without Mower | 121 cm |
Width Without Mower | 47.8 in. |
Width With Mower | 186.1 cm |
Width With Mower | 73.3 in. |
Width With Mower (Deflector Raised For Storage) | 155.8 cm |
Width With Mower (Deflector Raised For Storage) | 61.3 in. |
Height | 182.2 cm |
Height | 71.7 in. |
Weight | 485 kg |
Weight | 1070 lb. |
Rollover Protective Structure (ROPS) | Yes |
Slope 0perating Limit | 15 degrees (material collection systems, weather enclosures, or other attachments increase the risk of a rollover) degree (angle) |
Operator Presence System | Yes |
Park Brake Interlock | Yes |
Note 1 | Flip-up and adjustable foot platform for easy service access |
Warranty | 4 year/1200 hour bumper-to-bumper* (*Term limited to years or hours used, whichever comes first, and varies by model. See the LIMITED WARRANTY FOR NEW JOHN DEERE TURF AND UTILITY EQUIPMENT at JohnDeere.com or JohnDeere.ca/TUWarranty for details.) |
Mulching System | Optional mulch kit |
Rubber Floor Mat | Standard |
Light Kit | Standard LED work and optional beacon lights |
Material Collection System | Power Flow™ rear bagger; Not compatible with Tweel® Turf airless radial tires |
Material Collection System | 229 L |
Material Collection System | 6.5 bu |
Date Collected | 2026-09-01T00:00:00 |
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**The accuracy of this calculator and its applicability to your circumstances is not guaranteed. You should obtain personal advice from qualified professionals. This information is provided for illustrative purposes only and does not constitute an application. This notice does not guarantee loan approval, nor is it an offer or commitment to make a loan to you on the above terms.
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