ZTrak™ Z994R Diesel 24.7 HP (18.4-kW) | Zero-Turn Mowers

Powerful 24.7-hp (18.4-kW) diesel engine delivers superior performance and efficiency

3-cylinder diesel engine

Access to engine service points

The Z994R is powered by a 3-cylinder, liquid-cooled diesel engine with gross SAE J1995, PS 24.7 hp (18.4 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

Heavy-duty air cleaner

Air cleaner 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

Radiator cover

Radiator cover knob

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.

Radiator shown with debris screen removed

Radiator and electric cooling fan

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.

Radiator debris screen

Close-up of radiator debris screen

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

Fuel tank and angled fuel filler cap

Diesel fuel cap and fuel gauge

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

Cooling fins and fan for right-angle gearbox

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.

Four 7-Iron™ PRO Side-Discharge Mower Deck options give superior performance in every application

Z994R with fully adjustable suspension seat option and 72-in. (183-cm) mower deck

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

The 54-in. (137-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 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

Cast-iron mower spindle

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.

54-in. (137-cm) 7-Iron PRO Mower Deck

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

Features include:

Higher blade tip speed of 18,000 fpm (5486 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 stamped 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 Mower Deck

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

Features include:

Higher blade tip speed of 18,000 fpm (5486 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 stamped 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

	54-in. (137-cm) Side-Discharge	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 - stamped deck	7-Iron PRO - stamped deck	7-Iron PRO - stamped deck	7-Iron PRO - stamped deck
Mower compatibility:
Discharge	Side	Side	Side	Side
Mulching capability	Optional field-installed kit	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	1.5-5 in. (3.8-12.7 cm) in 0.25-in. (6.35 mm) increments
Cutting width	54 in. (137 cm)	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	Turning knob with foot pedal lift
High lift blades:
Blade length	19.1 in. (48.5 cm)	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)	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)	0.25 in. (6.35 mm)
Blade tip speed	18,000 fpm (5486 m/min)	18,000 fpm (5486 m/min)	18,000 fpm (5486 m/min)	18,000 fpm (5486 m/min)
Number of blades	Three	Three	Three	Three
Blade spindles:
Bearings	Grade=ABEC-1	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	Cold-forged and heat-treated
Spindle housings	Cast iron	Cast iron	Cast iron	Cast iron
Wheels:
Front anti-scalp rollers	Standard	Standard	Standard	Standard
Rear anti-scalp rollers	Standard	Standard	Standard	Standard
Deck construction	One-piece stamped steel	One-piece stamped steel	One-piece stamped steel	One-piece stamped 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)	7-gauge steel, 0.179 in. (4.55 mm)

Optional Power Flow blower

Power Flow blower

Power Flow blower in cleanout position

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.

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

60-in. (152-cm) 7-Iron PRO Mulch On Demand Mower Deck (shown on Z997R)

Mulch On Demand control lever (shown on Z997R)

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 18,000 fpm (5486 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 stamped 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

72-in. (183-cm) 7-Iron PRO mower shown on Z997R

Features include:

Higher blade tip speed of 18,000 fpm (5486 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 stamped 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

Optional three-bag material collection system (MCS)

Three-bag MCS

Standard weight bracket and weights, for three-bag MCS

The 14-bu (493-L), three-bag MCS is available for the Z994R with a 54-in. (137-cm) or 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

Dump-from-seat MCS

Standard weight bracket and weights, for dump-from-seat MCS

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.

Enhanced productivity, safety, and trim ability with a FastBack™ PRO rear-discharge mower deck

60-in. (152-cm) Rear-Discharge Mower Deck

72-in. (183-cm) Rear-Discharge Mower Deck

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

ZTrak™ Z900 Series Model	60-in. (152-cm) Rear-Discharge Mower Deck	72-in. (183-cm) Rear-Discharge Mower Deck
Z930M	X	---
Z950M	---	X
Z950R	X	---
Z970R	---	X
Z994R	X	X
Z997R	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

Center deck rollers and left wheel

Right-rear deck wheel

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 setting (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

Strong, reinforced deck

Right trim-side wear guard

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. (4.56-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.

Cast-iron blade-spindle housing

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.
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.

Ease of service

Quick-release belt cover

Cast-iron spindle housing assembly

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.
There is only one belt to service.

Extra convenience

Serrated-tread step

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.

Exceptional operator comfort begins with a high-quality seat and suspension

High back suspension seat

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 suspension with fore/aft control

Seat easily raised with spring-loaded latch

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

Fully adjustable suspension seat with armrests and 24-in. (61-cm) high back

Armrest adjustment

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

Mechanical suspension seat adjustment

Lumbar adjustment lever

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 available standard on R-spec Z900’s

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

Onboard storage compartment

Cup holder

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

Instruments and controls are easy to find and use

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

Instrument panel

Hour meter, monitoring, and diagnostic display

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

Brake & Go pedal

Mower lift pedal

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.

Motion-control lever and tracking adjustments

Motion-control lever height and fore/aft adjustment bolts

Motion-control lever gap (1) and tracking (2) 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.

Cut-height adjustment

Mower deck height adjustment knob

Transport lock knob

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

Motion-control levers in use

Motion-control levers in park position

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.

Serviceability features give convenience and maximize uptime

3-cylinder diesel engine

Access to engine service points

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.

Radiator coolant reservoir

Engine oil filter, dipstick, and fuel filter/water separator

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.

Removable floor panel

Floor panel removed for mower access (similar Z970R shown)

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

Flip-up seat

Service access with seat in raised position

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.

Battery

Sealed fuse and relay box

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 two-position height adjustment

Adjustments for fore-aft position (1) and tracking (2)

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

Service information label

Digital multi-function display

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

QR code label

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

Jack kit and jack installed

Jack in storage position

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

Z994R ZTrak™ Mower

Z994R ZTrak Mower

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.

Heavy-duty chassis components provide strength and durability

Z994R ZTrak™ Mower with optional dump-from-seat material collection system

Z994R ZTrak Mower

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

Z994R ZTrak Mower

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

Front axle and 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

Z994R rear bumper

Optional rear hitch

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).

Durable pump and wheel motor hydrostatic drive delivers speeds up to 11.4 mph (18.3 km/h)

Right angle gearbox with cooling fins and fan

Illustration of unitized pump and wheel motor drives

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

Transmission fluid tank fill cap

Motion-control levers (shown in park position)

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 height adjustment bolts

Motion-control lever gap (1) and tracking (2) 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.

Thoughtful designs and high-quality controls promote safe operation

Safety interlock systems

Brake & Go pedal

Motion-control levers (shown in park position)

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

60-in. (152-cm) Mower Deck

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

Mower decks are safety certified

Mowers decks are evaluated by the manufacturer (John Deere Turf Care) and conform to American Nation Standards Institute (ANSI) B71.4 2004 safety certification specifications for commercial turf care equipment.

Protective zone around the operator is provided by the rollover protective structure (ROPS)

Z994R with 72-in. (183-cm) mower deck

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.

ROPS in upright position

ROPS in intermediate 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.

ROPS in down position (similar vehicle shown)

Retractable seat belt

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)

Optional Light-emitting diode (LED) work lights

LED work lights

BUC11438 LED work lights are available as a field installed attachment. BUC11438 is compatible with model year 2015 and newer (serial number 030,001-) Z900 ZTrak Mowers. All Z997R and model year 2015-2018 (serial number 030,001-070,000) gasoline powered models require AUC18778 battery jumper.

Optional LED beacon light

LED beacon light

BUC11406 LED beacon light is available as a field installed attachment. The beacon light is short to avoid damage. BUC11406 is compatible with model year 2015 and newer (serial number 030,001-) Z900 ZTrak Mowers. All Z997R and model year 2015-2018 (serial number 030,001-070,000) gasoline powered models require AUC18778 battery jumper.

Michelin® X® Tweel® Turf airless radial tire technology option for a smoother ride and more uptime

Michelin X Tweel Turf on Z994R

Flat-free rear tire on ZTrak™ Mower

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.

Michelin X Tweel Turf

Michelin X Tweel Turf on Z994R

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

Run flat front caster wheel

Pneumatic rear drive wheel

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.

Engine Manufacturer/model	3TNV80F
Engine power	Gross at 3,200 rpm, PS: 24.7 hp 18.4 kW
Fuel tank capacity	11.5 U.S. gal. 43.5 L
Mower deck size	Side discharge, 54 in. 137 cm Side discharge, rear discharge, Mulch On Demand™: 60 in. 152 cm Side discharge, rear discharge: 72 in. 183 cm
Blade tip speed	Side discharge: approximately 16,000 fpm Rear discharge: approximately 15,000 fpm
Transmission	Dual hydrostatic wheel drive TuffTorq™ heavy-duty ground drive with cross porting for improved cooling
Speed range	0-11.4 mph 0-18.3 km/h
Drive wheels	24x12.00-12 4-ply turf, optional 24x12-12 Michelin® Tweel® turf tires
Caster wheels	13x5.0-6 flat free
Warranty	36 months or 1500 hours, whichever comes first, no hour limitation for the first 24 months.

Manufacturer/Model	3TNV80F
Power	Gross at 3,200 rpm, PS: 24.7 hp 18.4 kW
Displacement	77.3 cu in. 1.27 L
Cylinders	Three
Crankcase capacity	3.6 U.S. qt 3.4 L
Oil filter	Full flow, replaceable, spin-on type
Lubrication	Full pressure
Cooling	Liquid
Air cleaner	Pre-cleaner Yes Heavy-duty canister, dry type with safety element and air-restriction indicator
Injection

Fuel type	Diesel or Biodiesel (up to B20)
Fuel consumption
Fuel tank capacity	11.5 U.S. gal. 43.5 L
Fuel tank switch/shut-off valve	Yes

Charge system	75 amp
Battery voltage	12 V
Cold cranking amp	At 18 degrees C, 600 amp
Hour meter	Digital multi-function display
Operator presence starting system	Standard

Transmission	Dual hydrostatic wheel drive TuffTorq heavy-duty ground drive with cross porting for improved cooling
Hydraulic pumps
Wheel motors
Travel speed	Speed range 0-11.4 mph 0-18.3 km/h Forward 0-11.4 mph 0-18.3 km/h Reverse 0-4.5 mph 0-7.2 km/h
Speed and direction control	Zero turn
Hydraulic capacity	5.9 U.S. gal. 5.6 L
Hydraulic oil cooler	Fins and fan
Filter	Internal, replaceable

Dynamic braking	Twin motion control levers
Park brake	Internal wet disk integrated in the transmission
Park brake actuation	Foot brake engagement also brings steering levers to the neutral position

Type	Electric clutch
Drive	V-belt

Z994R DieselZTrak™ Zero-Turn Mower

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Features

Air cleaner with secondary safety element and restriction indicator

Radiator

Fuel tank

Gearbox cooling fins and fan

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

54-in. (137-cm) 7-Iron PRO Mower Deck

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

Side-discharge mower deck specifications

Optional Power Flow blower

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

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

Optional three-bag material collection system (MCS)

Optional dump-from-seat material collection system

Compatibility

Commercial-quality deck design

Level cut

Heavy-duty components for long life

Ease of service

Extra convenience

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

Foot pegs

Foot platform isolators

Onboard storage and cup holder

Right-hand control panel

Foot pedal Brake & Go starting system and mower lift

Motion-control lever and tracking adjustments

Cut-height adjustment

Motion-control levers

Battery and transmission fluid reservoir access

Motion-control lever and tracking adjustments

Service information and diagnostics

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

Optional service jack kit and jack

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

Formed and welded steel frame

Front axle and offset caster wheels

Rear bumper provides protection

Safety interlock systems

Mower deck safety

Mower decks are safety certified

Optional Light-emitting diode (LED) work lights

Optional LED beacon light

Tires deliver exceptional traction, maneuverability, and reliability

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