Z994R Diesel

The Z994R is powered by a 3-cylinder, liquid-cooled diesel engine with gross SAE J1995, PS 23.2 hp (17.3 kW) rated power at 3200 rpm that meets U.S. Environmental Protection Agency (EPA) Final Tier 4 emission standards:

• High-torque, low-emission diesel engine for strong performance in the toughest conditions
• Low vibration and noise levels
• Isolated with rubber mounts for a smoother operator ride
• Superior fuel economy
• High torque reserve for plenty of power and performance

Key features of the engine include:

• Economical, cast-in block cylinder design provides good cooling and long life.
• Liquid-cooled design provides more consistent operating temperatures than air-cooled.
• Fuel filter with replaceable element is provided.
• Indirect fuel injection uses a pre-combustion chamber to give the engine smooth and quiet operation.
• Full-pressure lubrication with full-flow filter lengthens engine life.
  • Engine wear reduced by ensuring proper lubrication, even when operating on hillsides or uneven terrain.
  • Oil filter helps keep oil clean for increased engine life.
• Aluminum alloy pistons with built-in steel struts are lightweight to reduce connection rod bearing loads and provide good heat-transfer characteristics.
  • Design permits tighter tolerances and neutralizes expansion of the piston, thereby reducing blow-by fuel and noise from the piston slap.
  • Higher top rings on the piston and a thinner head gasket greatly reduce the volume of unburned waste and increase combustion efficiency.
• Timing gears and injector drive gears utilize helical profile gears to help lower engine noise.
  • Gear teeth have a ''roll-off'' profile, giving almost no clash, no noise, and no backlash.
• Glow plugs provide quick starts in temperatures down to -18°C (0°F)
• Key start and shutoff eliminate fuel shut-off knob; electric solenoid shuts fuel supply off immediately when key is turned off.

Air cleaner with secondary safety element and restriction indicator

• Dual-element, dry-type air cleaner with safety element and air service indicator
  • Dual-element design for added engine protection and easy service
  • Completely sealed for effective cleaning
  • Ninety to 95 percent of dirt ejected before it reaches the paper element
• Air cleaner restriction indicator to let operator know when the filter needs servicing

Radiator

A sealed radiator compartment controls trash and debris. A cover is provided over the radiator, and a cooling fan area controls the flow of air.

Knobs on both ends of the cover hold it in place.

An automotive-type radiator, coolant reservoir, and electric cooling fan are provided to remove heat from the engine coolant:

• The cooling fan is thermostatically controlled so it only runs when necessary.
• See-through coolant recovery tank permits the operator to check the coolant level without removing the radiator cap.

A debris screen with a corrugated shape to give a large surface area covers the intake air side of the radiator to keep the radiator fins clean.

The debris screen can be easily removed for cleaning, if desired, and also for access to the radiator fins.

Fuel tank

The Z994R Diesel ZTrak™ Mower is equipped with a single 11.5-U.S. gal. (43.5-L) fuel tank that provides enough capacity to allow mowing for a full day without refueling:

• Large, angled filler neck makes for easier refueling
• Fuel cap tether is provided to secure the filler cap while refueling
• Fuel gauge is provided as standard equipment

NOTE: The fuel fill level is 1 in. (25 mm) below the bottom of the filler neck.

Gearbox cooling fins and fan

A right-angle gearbox is used to convert power from the horizontal shaft diesel engine to vertical shaft power to operate the vehicle transmission and the mower power-take off clutch. Cooling for the gearbox is provided by fins on the gearbox housing and a fan.

There are three side-discharge mower-deck options available for the Z994R Diesel ZTrak™ Mower:

• The 60-in. (152-cm) 7-Iron PRO Side-Discharge Mower Deck is suited to a variety of mowing jobs, including trimming and grooming.
• The 60-in. (152-cm) 7-Iron PRO Mulch On Demand™ Mower Deck can be converted from a wide-open, side-discharge mode to a fully chambered mulching mode with a single move of a lever.
• The 72-in. (183-cm) 7-Iron PRO Side-Discharge Mower Deck is suited to a variety of mowing jobs, including trimming and grooming.

Extra reliability and long life with cast-iron blade spindle housings

On every commercial mower deck there are three 1-in. (25-mm) spindles that are cold-forged and heat-treated for strength. Spindles are supported by precision ball bearings that provide great performance and reliability.

• Superior impact strength provided by ductile cast-iron material.
• Gusseted design puts reinforcement where it is needed.
• Strength of cast iron protects against damage from blade impacts.
• Easy access grease fittings are mounted at the top of the spindle shafts for convenience.
• Grease pressure-relief valve minimizes seal damage from overfilling with grease and keeps debris from entering housing.
• Chance of deck shell damage is minimized with the 8-in. (20.3-cm) diameter housing and six mounting bolts that distribute loads and impacts.
• Ability to be reliably rebuilt is provided by use of cast iron.

60-in. (152-cm) 7-Iron PRO Mower Deck

Features include:

• Higher blade tip speed of approximately 16,500 fpm (5029 m/min) gives more blade strikes per distance of forward travel.
• The front baffle is designed to better manage airflow and control clippings.
• Spindle-pocket reinforcement provides even greater structural durability.
• A raised discharge chute allows for even clipping distribution.
• Thick, 7-gauge, 0.179-in. (4.55-mm) steel construction gives commercial durability.
• The three-spindle design provides a smooth, even cut.
• The trim edge of the deck is equipped with a bumper that provides great abrasion resistance to protect the machine and the property.
• A plastic discharge deflector reduces damage to foliage and resists bending.
• The formed, steel-deck design is forged from a single sheet of steel to eliminate corners where grass can collect.
• The deep deck gives increased vacuum action that reduces dropped clippings.
• The belt drive efficiently transfers power from gearbox to spindles.
• Spindle grease fittings are on top for easy access.
• Quick-change cutting-height adjustment is easy to use.
• Blade overlap of 1.57 in. (40 mm) reduces the number of missed grass blades.
• A mulching attachment is available.
• The Power Flow rear material collection system is available.
• Quick release belt covers for added convenience

60-in. (152-cm) 7-Iron PRO Mulch On Demand Mower Deck

Features include:

• The deck can be converted from a wide-open side discharge mode to a fully chambered mulching mode with a single move of a lever.
• Higher blade tip speed of approximately 16,500 fpm (5029 m/min) gives more blade strikes per distance of forward travel.
• The front baffle is designed to better manage airflow and control clippings.
• Spindle-pocket reinforcement provides even greater structural durability.
• A raised discharge chute allows for even clipping distribution.
• Thick, 7-gauge, 0.179-in. (4.55-mm) steel construction gives commercial durability.
• The three-spindle design provides a smooth, even cut.
• The trim edge of the deck is equipped with a bumper that provides great abrasion resistance to protect the machine and the property.
• A plastic discharge deflector reduces damage to foliage and resists bending.
• The formed, steel-deck design is forged from a single sheet of steel to eliminate corners where grass can collect.
• The deep deck gives increased vacuum action that reduces dropped clippings.
• The belt drive efficiently transfers power from gearbox to spindles.
• Spindle grease fittings are on top for easy access.
• Quick-change cutting-height adjustment is easy to use.
• Blade overlap of 1.57 in. (40 mm) reduces the number of missed grass blades.
• The mulching attachment is available.
• The Power Flow rear material collection system is available.
• Quick release belt covers for added convenience

72-in. (183-cm) 7-Iron PRO Mower Deck

Features include:

• Higher blade tip speed of approximately 16,500 fpm (5029 m/min) gives more blade strikes per distance of forward travel.
• The front baffle is designed to better manage airflow and control clippings.
• Spindle-pocket reinforcement provides even greater structural durability.
• A raised discharge chute allows for even clipping distribution.
• Thick, 7-gauge, 0.179-in. (4.55-mm) steel construction gives commercial durability.
• The three-spindle design provides a smooth, even cut.
• The trim edge of the deck is equipped with a bumper that provides great abrasion resistance to protect the machine and the property.
• A plastic discharge deflector reduces damage to foliage and resists bending.
• The formed, steel-deck design is forged from a single sheet of steel to eliminate corners where grass can collect.
• The deep deck gives increased vacuum action that reduces dropped clippings.
• The belt drive efficiently transfers power from gearbox to spindles.
• Spindle grease fittings are on top for easy access.
• Quick-change cutting-height adjustment is easy to use.
• Blade overlap of 1.57 in. (40 mm) reduces the number of missed grass blades.
• A mulching attachment is available.
• The Power Flow rear material collection system is available.
• Quick release belt covers for added convenience

Side-discharge mower deck specifications

60-in. (152-cm)
Side-Discharge

60-in. (152-cm)
Side-Discharge
Mulch On Demand

72-in. (183-cm) Side-Discharge

Mower type

7-Iron PRO - forged deck

7-Iron PRO - forged deck

7-Iron PRO - forged deck

Mower compatibility:

Discharge

Side

Side

Side

Mulching
capability

Optional field-installed kit

Standard Mulch On Demand included

Optional field-installed kit

Cut-height
range

1.5-5 in. (3.8-12.7 cm) in 0.25-in. (6.35 mm) increments

1.5-5 in. (3.8-12.7 cm) in 0.25-in. (6.35 mm) increments

1.5-5 in. (3.8-12.7 cm) in 0.25-in. (6.35 mm) increments

Cutting width

60 in. (152 cm)

60 in. (152 cm)

72 in. (183 cm)

Height-of-cut
adjustment

Turning knob with foot pedal lift

Turning knob with foot pedal lift

Turning knob with foot pedal lift

High lift blades:

Blade length

21 in. (53 cm)

21 in. (53 cm)

25 in. (63 cm)

Blade width

3 in. (7.6 cm)

3 in. (7.6 cm)

3 in. (7.6 cm)

Blade thickness

0.25 in. (6.35 mm)

0.25 in. (6.35 mm)

0.25 in. (6.35 mm)

Blade tip speed

Approximately 16,500 fpm (5029 m/min)

Approximately 16,500 fpm (5029 m/min)

Approximately 16,500 fpm (5029 m/min)

Number of
blades

Three

Three

Three

Blade spindles:

Bearings

Grade=ABEC-1

Grade=ABEC-1

Grade=ABEC-1

Spindles

Cold-forged and heat-treated

Cold-forged and heat-treated

Cold-forged and heat-treated

Spindle
housings

Cast iron

Cast iron

Cast iron

Wheels:

Front anti-scalp
rollers

Standard

Standard

Standard

Rear anti-scalp rollers

Standard

Standard

Standard

Deck construction

One-piece forged steel

One-piece forged steel

One-piece forged steel

Deck thickness

7-gauge steel, 0.179 in. (4.55 mm)

7-gauge steel, 0.179 in. (4.55 mm)

7-gauge steel, 0.179 in. (4.55 mm)

Optional three-bag material collection system (MCS)

The 14-bu (493-L), three-bag MCS is available for the Z994R with a 60-in. (152-cm) Mower Deck, or a 60-in. (152-cm) Mulch On Demand Mower Deck. Professional landscape contractors can increase productivity by utilizing this durable collection system. This system allows fast, easy grass clipping and leaf collection to give lawns a well-groomed appearance.

Optional dump-from-seat material collection system

The durable dump-from-seat MCS for the Z994R ZTrak Mower increases productivity. Professional landscape contractors are able to empty the large, 13-bu (458-L) capacity hopper without leaving the seat. This system allows fast, easy grass clipping and leaf collection to give lawns a well-groomed appearance.

Optional Power Flow blower

A Power Flow blower is required (ordered separately) for use of a three-bag or dump-from-seat MCS.

The Power Flow blower can be opened for easy and thorough cleanout.

For professional landscapers and government municipalities requiring rear discharge placement of grass and debris, John Deere FastBack PRO rear-discharge mower decks deliver a commercial zero-turn mowing solution for both gas and diesel machines. Advantages of a rear-discharge mower include:

• Less chance of damage from objects being thrown from the mower deck
• Time savings with the ability to mow closely around fixed objects with either side of the deck
• A cleaner mowing experience by lessening the amount of debris that can blow onto the operator

A rear-discharge mower deck is ideally suited for:

• Schools
• Parks
• Playgrounds
• Traffic areas (city boulevards, roadsides, etc.)
• Areas with long, grassy spots that need to be cut, where you are not as concerned about wide dispersal of grass (park areas, roadsides, etc.)*

*NOTE: Operators maintaining turf outside of target areas are encouraged to evaluate rear-discharge dispersion through a cut quality demonstration to ensure satisfaction.

Compatibility

Mower deck

Z930M

Z950M

Z955M EFI

Z960M

Z975M EFI

Z950R

Z955R EFI

Z965R EFI

Z970R

Z985R EFI

Z994R

Z997M

Z997R

60-in. (152-cm) FastBack PRO rear- discharge

x

x

x

x

x

x

x

x

72-in. (183-cm) FastBack PRO rear- discharge

x

x

x

x

x

x

x

x

x

x

Commercial-quality deck design

A large volume of material can be thoroughly processed with the deep-deck design:

• Unique baffling system is designed to reduce clumping and windrowing often associated with rear-discharge mowers.
  • Efficiency is enhanced with baffles surrounding each blade to control material as it is moved to the rear.
  • Material exits the deck quickly as the baffles are lower at the rear.
  • Movement of material is controlled to minimize the likelihood that clippings are thrown onto unwanted areas.
• Less debris gets on the operator as material is directed to the rear and toward the ground.
  • Debris is kept low and directed into the turf by the flexible rear shield.

Level cut

The deck is suspended from and supported by the machine to provide a level cut. Mower deck wheels and rollers help smooth out the mowing job in uneven conditions and reduce the chance of scalping the lawn:

• Two wide front rollers at the center of the mower support the deck when necessary to prevent scalping.
• Wheels at all four corners protect the deck from scalping at the sides of the mower.
• Continued effectiveness results from wheels and rollers that are double captured for extra strength, which reduces the chance of damage.
• Height of rollers and wheels is adjustable to suit mowing conditions.
  • Higher settings (shown in images) are used when mowing at lower cut heights and for rougher conditions at all cut heights where you want to reduce the chance of the wheels hitting the ground.
  • Lower settings are used for higher cut heights and for helping to smooth out the mowing job.
• Mower cut height is adjustable from 1 to 5.5 in. (2.54 to 14 cm) in 0.25-in. (0.64-cm) increments from the machine operator’s station.

Heavy-duty components for long life

These rear-discharge decks are designed to stand up to heavy-duty commercial use:

• Superior strength and durability come from a 7-gauge, 0.179-in. (4.6-mm) steel deck.
• Experience extra strength and long life with a fabricated deck design that is formed, welded, and reinforced for extra protection from damage.
• The front of the deck is protected from damage by a 1.5-in. (3.8-cm) tall by 0.5-in. (1.3-cm) thick solid steel bar welded to the mower deck for additional strength.
• Both sides of the deck have bumpers that are made from compression molded ultra-high molecular weight (UHMW) polyethylene plastic.
  • The bumpers provide great abrasion resistance to protect the machine and the property.
  • Additional strength is provided by a 0.5-in. (1.3-cm) by 0.5-in. (1.3-cm) thick solid-steel bar.

Durability is designed into the mower blade drive system:

• Reliably powered by a universal joint shaft drive from the vehicle transmission to a heavy-duty right-angle, cast-iron gearbox (Z997M, Z997R, Z998R)
• Dependable v-belt drive system

Extra reliability and long life are provided by cast-iron blade spindle housings:

• Ductile cast-iron material provides superior impact strength.
• Gusseted design puts reinforcement where it is needed.
• Strength of cast iron protects against damage from blade impacts.
• Grease pressure-relief valve minimizes seal damage from overfilling with grease and keeps debris from entering housing.
• Chance of deck-shell damage is minimized with the 8-in. (20.3-cm) diameter housing and six mounting bolts that distribute loads and impacts.
• Ability to be reliably rebuilt is provided by the use of cast iron.

Ease of service

Minimal service requirements increase uptime:

• Quick-release belt covers do not require tools or the removal of a ring clip; just lift one corner of the cover and rotate it slightly to remove.
  • A hole in the deck tab is provided for use of an optional ring clip for extra security, if desired.
  • This makes it quick and easy for you to clean out trash that may collect around the spindle sheave.
• Convenient spindle greasing with fittings at the top of spindle shafts are accessible through a hole in the top of the spindle/belt covers.
  • The center spindle is accessed by no-tools removal of the vehicle floor pan.
• There is only one belt to service.

Extra convenience

Extra convenience and security are provided by a serrated surface that is welded to the top left corner of the deck, providing additional traction when entering and exiting the operator station.

Operator comfort was a primary focus in the design of the Z994R:

• Large, open operator station and foot platform with plenty of legroom and room for multiple foot positions
• A choice of seat and suspension options to suit the operator and operating conditions
• Instruments, controls, and storage areas that are easy to see and use
• Three-position rollover protective structure (ROPS) and retractable seat belt for operator safety and convenience
• Thick seat cushion for lasting comfort, even after a full day of use
• Retractable seatbelt for convenience and ease of use
• Springs to isolate the seat base for increased ride comfort

• ComfortGlide fore/aft suspension for superior ride comfort over uneven areas
  • Seat can travel up to 2 in. (50.8 mm) fore and aft to absorb bumps for a significant enhancement to ride comfort
  • Ability to easily lock out if desired by the operator
  • One lever for three functions
    • Slide seat forward and back 3 in. (7.6 cm)
    • Activate ComfortGlide fore/aft seat suspension
    • Lock-out ComfortGlide fore/aft seat suspension

A spring-type locking mechanism holds the seat securely down in the operating position for operator comfort and safety, but allows quick release for tilting the seat up:

• For protection from the elements
• For access to the transmission fluid reserve tank, battery, etc.

Fully adjustable seat with 24-in. (61-cm) high back, armrests and ComfortGlide fore/aft suspension

The fully adjustable, 24-in. (61-cm) high-back, mechanical suspension seat with adjustable armrests includes:

• Adjustable armrests that can also be raised for operator convenience

• Suspension seat control dial for easy adjustment of suspension to suit the operator
• Adjustable lumbar support for operator preference
  • Lumbar adjustment gives extra operator comfort
  • Adjustment is especially helpful when operating the vehicle for extended periods of time
• Vibration reduction
• Seat back-angle adjustment to maximize operator comfort by using a convenient lever on the side of the seat

Foot pegs

Foot pegs help provide the operator with a comfortable foot placement.

• Location and angle of foot pegs can be adjusted for individual operator comfort.

Foot platform isolators

Foot platform isolators provide the operator with added comfort.

• Vibration to the legs and feet is reduced.

Onboard storage and cup holder

A convenient storage compartment and cup holder are available within easy reach of the operator.

The contoured dash has clean, attractive styling:

• Controls are located on the right instrument panel for convenience
• Color coded and labeled for easy identification by the operator
• Controls are logically placed and easy to reach on the right-hand control panel
• Functional design of the controls provides good appearance and a comfortable feel

Right-hand control panel

Controls are grouped on the right console, providing one central location for key switch, engine speed control, power take-off (PTO) engagement, height-of-cut adjustment, hour meter, and engine diagnostics.

The comprehensive display tells when oil changes and other maintenance should be performed, monitors vehicle function, and helps diagnose common downtime issues:

• A service reminder feature will indicate that a general lubrication or mower/engine service interval has been reached.
• When service is required, arrows will periodically flash for two hours.
• Other features include:
  • Hour meter
  • Engine overheat warning light
  • Battery/alternator warning light
  • High transmission oil temperature warning light
  • Glow plug on indicator light
  • Maintenance needed indicator light
  • Low engine oil pressure warning light

Foot pedal Brake & Go starting system and mower lift

The Brake & Go starting system is a John Deere exclusive. This feature makes the starting process easier:

• The Brake & Go starting system is easy to understand and use.
• To start the machine, the parking brake must be engaged.
• It does not matter whether the PTO switch is on or off, nor does it matter if the control levers are pulled in or extended out.
  • As long as the parking brake is engaged, the machine will start. When the parking brake is applied, the control levers cannot be moved.
• Park brake engagement returns motion-control levers to the neutral position.

A foot pedal is used to raise the mower deck to adjust cut height or lock the mower deck in the transport position:

• A foot pedal is easier for many operators to use than a hand lever.
• Adjustable spring assist allows fine-tuning lift effort to the mower and the operator.

Cut-height adjustment

An easy-to-use height-of-cut adjustment lift system allows the operator to quickly adjust deck height for different mowing applications as well as transport:

• An easy-to-use cutting-height lift system allows the operator to adjust the mower deck height with no tools and minimal effort.
• The easy-to-grip knob allows operators to dial in the desired height of cut (HOC).
• Cutting height can be adjusted from approximately 1 in. to 5.5 in. (2.5 cm to 14 cm).
• Rotate the knob to adjust from 1 in. to 5.5 in. (2.5 cm to 14 cm) in 0.25-in. (0.64 cm) increments.
• Each increment on the knob adjusts the HOC approximately 0.25 in. (0.64 cm).
• The deck can also be raised and locked in a transport position to provide maximum ground clearance when moving the machine from one area to another.

The transport lock function allows the deck to be locked in the transport position and returned to the previous HOC.

• Use the foot-lift pedal to lift the deck, then engage the transport lock.
• To unlock and lower the deck, simply pull up on the transport unlock knob, adjust the dial, and release the deck lift assist pedal to lower the deck to the chosen height.

This design increases productivity by allowing operators to change the cutting height without having to leave the seat.

Motion-control levers

Two hydrostatic control levers are designed for operator comfort and control:

• Allow the operator to select the ground speed and direction simply by moving levers forward or reverse
• Positive neutral lock position for levers provides added safety

The wide-bend, large-diameter steering levers swing out easily for entry and exit from the operator platform.

Motion-control lever and tracking adjustments

Motion-control lever adjustments include:

• Two height positions to suit the operator.
• Control lever fore/aft position to suit operator size and preference.
  • Slots in control levers allow forward/rearward adjustment of control arms when the bolts are loose.
• Gap between the control levers adjustment (1).
• From-the-seat tracking adjustment (2), operators can mow straight and produce professional striping results.

Frequently accessed service areas such as the air cleaner, radiator screen, and oil check and fill points can be easily accessed from the open engine compartment.

An easy-to-remove rear engine service panel allows access to all engine service points for scheduled service or other maintenance work.

The design of the Z994R makes service components like the engine oil dipstick, oil filter, and fuel filter/water separator easy to see and access:

• Large radiator coolant reservoir and fuel filter/separator reduce service requirements and increase uptime.
• A convenient fuel shutoff is provided on the filter/separator.

The floor panel is easily removed, without tools, to give access to the top of the mower deck for cleaning and service.

All mower deck blade spindle grease fittings can be accessed from the top of the mower deck.

Battery and transmission fluid reservoir access

The seat is locked down for operator comfort and safety, but the spring latch system is easily released to raise the seat to protect it from the elements and give access to the battery, transmission fluid reservoir, etc.

• Maintenance free, 600 cold-cranking amp (CCA) battery is provided for fast, reliable engine starts.
• Electrical box is sealed to keep dirt and moisture out for reliability and ease of service.

Motion-control lever and tracking adjustments

Motion-control lever adjustments include:

• Two height positions to suit the operator
• Control lever fore/aft position to suit operator size and preference
  • Slots in control levers allow forward/rearward adjustment of control arms when the bolts are loose.
• Gap between the control levers adjustment (1)
• From-the-seat tracking adjustment (2) so operators can mow straight and produce professional striping results

Service information and diagnostics

A digital multifunction display shows the number of hours the machine is run when the key switch is in the on position. It only counts the hours the engine is actually running. Monitoring systems to notify operators of machine status and quickly diagnose common downtime issues include:

• Glow plug monitor
• Maintenance required notification
• Low oil pressure
• Hour meter
• Coolant overheat notification
• Battery charging system
• High engine oil temperature

Quick response (QR) codes link to owner information web pages

To speed access to owner information web pages, a QR code is printed onto a product identification number (PIN) label located under the right steering lever. The owner information web pages that include links to:

• Safety and how-to videos
• Operator’s manuals
• Parts catalogs
• Maintenance reminder sheets
• Attachments
• Warranty statements

Optional service jack kit and jack

The Z994R front frame member is pre-drilled to accept the optional jack kit and jack:

• The jack makes servicing the underside of the mower deck safer and easier.
• Placed in the storage position, the jack can be carried on the machine, always available for use.
  • The jack will need to be removed when using front ballast that is required for a rear material collection system.

Three-year, 1500-hour bumper-to-bumper warranty

An exclusive two-year, unlimited hour/three-year, 1500-hour (whichever comes first) bumper-to-bumper warranty is standard on the Z994R. The warranty is best in the industry and puts John Deere at the forefront of commercial mowing. It is also hassle free, with one company handling all of the paperwork.

NOTE: The warranty covers 36 months or 1500 hours, whichever comes first. For the first 24 months, there is no hour limitation.

Attractive styling incorporates a roomy and uncluttered operator platform with adjustable footrest, seat, and steering control positions for different operator preferences. Other well-thought-out features further contribute to good looks and operator comfort.

The frame is made of heavy-duty formed and welded steel for strength and reliability.

Formed and welded steel frame

A strong, welded steel frame provides solid, reliable support for the machine components and operator:

• Heavy-duty, 7-gauge, 0.179-in. (4.55-mm) 1.5x3-in. (38x76.2-mm) steel tubular frame for durability
• Wide-open access for maintenance and cleaning
• Rear frame provides solid support and protection for the engine

Front axle and offset caster wheels

Cast I-beam caster arm and spindle assemblies handle the beating and pounding professional mowers receive.

Caster wheels are offset for optimum steering and mowing performance. Benefits include better inside-corner trimming performance and less chance of between-blade striping.

Rear bumper provides protection

A steel rear bumper provides protection for the machine.

A rear hitch can be added to the steel bumper for towing purposes. The Z994R can tow up to 400 lb (181.4 kg).

A right-angle gearbox is used to convert power from the horizontal shaft diesel engine to vertical shaft power to operate the vehicle transmission. Cooling for the gearbox is provided by fins on the gearbox housing and a fan.

The hydrostatic drive included with the Z994R features two 13-cc (0.8-cu in.) unitized hydraulic pumps combined with commercial-grade, heavy-duty, 13-cc (0.8-cu in.) wheel motors into a single unit. The drive units feature cross porting, where the hydraulic fluid from the side doing the least work is filtered and then fed into the input of the side doing the most work. This ensures that the coolest fluid is going into the side working the hardest in order to provide the best performance during extended hillside operation in the same direction.

One pump and motor drive assembly for each wheel provides the following benefits:

• Exceptional cooling, even in high-load conditions
• Easy-to-check level and refill hydraulic oil
• Opens up access under the seat

One transmission oil reservoir is used for both of the unitized transmissions.

Motion control levers are designed for operator comfort and ease of controlling vehicle speed and direction.

Motion-control lever adjustments include:

• Two height positions to suit the operator.
• Control lever fore/aft position to suit operator size and preference.
  • Slots in control levers allow forward/rearward adjustment of control arms when the bolts are loose.
• Gap between the control levers adjustment (1).
• From-the-seat tracking adjustment (2), operators can mow straight and produce professional striping results.

Safety interlock systems

The Brake & Go starting system is a John Deere exclusive. This feature makes the starting process easier:

• The Brake & Go starting system is easy to understand and use.
• To start the machine, the parking brake must be engaged.
• It does not matter whether the power take-off (PTO) switch is on or off, nor does it matter if the control levers are pulled in or extended out.
  • As long as the parking brake is engaged, the machine will start. When the parking brake is applied, the control levers cannot be moved.
• Brake & Go operator-presence system returns levers to the neutral position when the brake pedal is actively engaged.

Mower deck safety

Mower safety features include:

• A high-quality deflector that meets applicable safety standards and disperses cut grass
• Spindle-sheave shielding that protects and is easy to remove without tools for cleaning and service
• A substantial welded-on metal step on the mower deck for safer operator entry and exit from the machine

The spacious operator station has been designed for comfort, visibility, and ease of use:

• Getting on and off is easy with the flat operator platform.
• Convenient-to-use controls located close to the operator are color coded and designed for easy identification and operation.

The ROPS and seat belt work in conjunction to provide a protective zone around the operator:

• It reduces the operator’s risk of being crushed under the vehicle should it overturn.
• When used with the seatbelt, the ROPS can reduce the severity of injury in the event of a rollover.
  • Use of the seat belt is recommended when operating with ROPS in the upright position.

Foldable ROPS and a retractable seat belt are standard equipment:

• Position adjustment pins provide a good grip and make changing the angle of the ROPS easier.
• If operating in low clearance areas, the ROPS can be folded and secured out of the way. It can also be positioned in an intermediate position to accommodate machines equipped with a material collection system.
• Under normal operation, the ROPS should be in the up position.
• See Operator’s Manual for more information on ROPS.

• Door height of most garages will accommodate the machine with ROPS in the full-raised position.
  • Easy-fold ROPS improves the ability to store the ZTrak™ mower in structures with a lower door opening.

ROPS position
Height at top of ROPS

Full height
73 in. (185 cm)

Down
47 in. (119 cm)

Safety certification

John Deere commercial mowers are evaluated by the manufacturer (John Deere Turf Care) and conform to American National Standards Institute (ANSI) / Outdoor Power Equipment Institute (OPEI) 5395-1 and 5395-3 safety requirements for combustion-engine-powered lawnmowers.

Optional Light-emitting diode (LED) work lights

BUC11438 LED work lights provide the ability to mow at twilight and are available as a field installed attachment. See attachment story for compatibility and requirements.

Optional LED beacon light

BUC11406 LED beacon light signals to others that the machine is approaching and is available as a field installed attachment. See attachment story for compatibility and requirements.

Overview

A JDLink™ M Modem connects a commercial mower to the John Deere Operations Center, which enables you to manage your fleet more efficiently, increase productivity, and reduce labor costs. With a modem and Operations Center, you are always connected to the work in progress and can make timely adjustments to keep your fleet mowing.

JDLink M Modem

A JDLink M Modem is standard equipment on model year 2024 and newer TerrainCut Front and Wide-Area Mowers.

A modem can be field installed on:

• Model year 2024 and newer Z700 ZTrak™ Mowers
• Model year 2024 and newer gasoline-powered Z900 ZTrak Mowers
• Model year 2024 and newer Z994R ZTrak Mowers
• Model year 2021 and newer Z997R ZTrak Mowers
• Model year 2024 and newer Q800 QuikTrak™ Mowers
• Model year 2025 and newer R Series commercial walk-behind mowers
• Model year 2022-2023 TerrainCut Front Mowers
• Model year 2023 TerrainCut Wide-Area Mowers

See compatibility section for serial number breaks and requirements.

John Deere Operations Center

The John Deere Operations Center tracks your fleet and provides tools to analyze mower data. The connected features vary by mower model.

Models

Location and status

GPS

speed

Geofencing and curfews

Engine hours

Maintenance planner

Machine Analyzer Tool

Fuel level

Fuel consumption

Diagnostic trouble codes

Service Advisor Remote

Z700 ZTrak Mowers

X

X

X

Key

X

X

---

---

---

---

Z900 ZTrak Mowers with carbureted engines

X

X

X

Key

X

X

---

---

---

---

Z900 ZTrak Mowers with EFI engines

X

X

X

Sync

X

X

X

X

X

X

Z994R ZTrak Mowers

X

X

X

Key

X

X

---

---

---

---

Z997R ZTrak Mowers

X

X

X

Sync

X

X

---

X

X

X

E Series QuikTrak Mowers

X

X

X

Key

X

X

---

---

---

---

Q820M, Q850M, and Q850R QuikTrak Mowers

X

X

X

Sync

X

X

X

---

X

---

Q865R EFI QuikTrak Mowers

X

X

X

Sync

X

X

X

X

X

X

R Series commercial walk-behind mowers

X

X

X

Key

X

X

---

---

---

---

1550 TerrainCut Front Mowers

X

X

X

Key

X

X

---

---

---

---

1570, 1575, 1580, and 1585 TerrainCut Front Mowers

X

X

X

Key

X

X

---

X

X

X

1600 TerrainCut Wide-Area Mowers

X

X

X

Key

X

X

---

X

X

X

Location and status

The JDLink M Modem regularly transmits the location and operational status of each mower in the fleet so you can monitor mowing progress in Operations Center.

• Location history-Display of map with current and past locations of each mower.
• GPS Speed-Maps each mower’s current speed, based on GPS location data, so you can target operator training.
• Hours of operation-Reports the time of day the vehicle has been operated.
• Geofencing-Alerts when a mower enters or exits a prescribed area, for example if the mower has been stolen or an operator entered an area that should not be mowed.
• Curfews-Alerts if the mower is operating outside prescribed times, for example residential areas with early-morning noise restrictions.

Engine hours

The modem regularly transmits the mower’s engine hours to inform maintenance planning and balance use.

• Sync-The mower reports actual engine hours to the Operations Center.
• Key-Engine hours are estimated by monitoring the key switch. Engine hours can be corrected in Operations Center.

Maintenance planner

Factory or custom maintenance plans can be established in Operations Center. Maintenance alerts are sent when engine hours reach maintenance intervals.

Machine Analyzer Tool

On select products, the modem reports the time the mower spent transporting, idling, and working. The Operations Center’s Machine Analyzer tool reports usage data which allows you to analyze operator behavior, identify causes of low productivity, and initiate corrective actions.

Fuel level

On select products, the modem reports the fuel level. On these products, an analysis of fuel consumption is available in the Operations Center Machine Analyzer Tool. Measuring fuel consumption enables you to address causes of excessive fuel use.

Diagnostic trouble codes (DTCs)

On select products, the modem transmits the trouble codes generated by the mower’s control units to the Operations Center. Addressing DTCs can reduce downtime and repair costs. For example, a low-engine oil pressure DTC can indicate an engine is low on oil. Addressing the issue can prevent costly downtime and repairs.

To help address issues quickly, when a DTC is generated, the Operations Center can display a push notification on the mobile app and send an email. Operations Center can also be configured to limit notifications to stop-level severity DTCs.

Service Advisor Remote

On select products, John Deere dealers can perform remote diagnostics, software programming, and adjustments without the cost of a service call.

Compatibility

A JDLink M Modem is standard equipment on model year 2024 and newer (SN 110,001-) TerrainCut Front Mowers and model year 2024 and newer (SN 690,001-) TerrainCut Wide-Area Mowers.

A JDLink M Modem can be field installed on the commercial mowing products listed below. Field installation attachments simplify modem installation, and include brackets, mounting hardware, harness, and instructions. Field installation requires a JDLink M Modem to be ordered separately. The field installation attachments include a wiring harness therefore the modem should be ordered with the less harness option code.

Model

Compatible model years

Installation attachment

Z700 ZTrak Mowers

2024 and newer (SN 080,001-)

BUC11759

Gasoline-powered Z900 ZTrak Mowers

2024 and newer (SN 130,001-)

BUC11759

Z994R ZTrak Mowers

2024 and newer (SN 070,001-)

BUC11759

Z997R ZTrak Mowers

2021 and newer (SN 070,001-)

BUC11908

QuikTrak Mowers

2024 and newer (SN 010,001-)

BUC11744

R Series commercial walk-behind mowers

2025 and newer (SN 070,001-)

BUC11918

TerrainCut Front Mowers

2022-2023 (SN 080,001-110,000)

BUC11797

1600 TerrainCut Wide-Area Mowers

2023 (SN 680,001-690,000)

BUC11797

John Deere leads the commercial zero-turn mower industry with use of the Michelin X Tweel Turf technology.

Michelin is a world leader in tire manufacturing and technology. This airless radial tire solution is an industry first for John Deere, which provides a smoother ride for the operator and additional advantages to John Deere owners.

Advantages of the Michelin X Tweel Turf include:

• Mowing performance is improved.
  • Rutting is reduced because the Michelin X Tweel Turf has more support across the surface for improved flotation and better ground contact.
  • Unique energy transfer within the poly-resin spokes reduces the bounce associated with pneumatic tires, to give a smoother ride.
  • Excellent curb climbing is possible due to the Michelin X Tweel Turf construction and flexibility.
  • More consistent cut quality is achieved because inconsistent tire pressure is eliminated.
• Uptime is improved.
  • The exclusive technology eliminates downtime and associated cost due to flat or damaged tires. Punctures and sidewall damage no longer result in downtime.
• Cost of operation is reduced.
  • Cost of repairs and maintenance is reduced. One single unit replaces the current tire, wheel, and valve assembly. There is no need for complex tire-mounting equipment.
  • No need to spend time checking and optimizing tire pressure.
  • The need to purchase and stock plug kits and spare tires is eliminated, particularly for professional landscape contractors and government agencies who normally stock them.
  • The tire tread will last up to three times longer than current pneumatic tires because automotive-grade rubber is used for the tread.

Heavy-duty construction provides the ultimate in performance and reliable operation:

• High-strength poly-resin spokes carry the load.
• Four-hole, heavy-duty steel hub easily bolts onto any Z994R ZTrak Mower.
• Deep, open-tread design provides excellent cleaning and traction.
• Zero degree, high-tensile proprietary carcass provides great lateral stiffness while resisting damage from impact and penetration.

Tires deliver exceptional traction, maneuverability, and reliability

The ZTrak Z994R Mower is equipped with 13x6.5-6 run flat front caster tires that provide:

• Excellent reliability and uptime
• Low center of gravity to increase hillside mowing capability
• Caster wheels and caster wheel towers with sealed bearings for long life and easy steering
• Offset front caster wheels to help improve the inside corner-trim performance and reduce between-blade striping

A choice of rear wheel options is available for factory installation:

• 24x12-12 4 PR pneumatic drive tires in base equipment for excellent traction, flotation, and curb climbing
• 24x12-12 Michelin X Tweel Turf airless radial tire technology option for a smoother ride and more uptime

Michelin, X, and Tweel are trademarks of Compagnie Générale des Etablissements Michelin SCA.