John Deere Q850r stand on

Commercial-quality V-twin air-cooled engines power the QuikTrakâ„¢ Mowers:

• FX730V 23.5 hp (17.5 kW) gross at 3600 rpm (Q820M)
• FX850V 27 hp (20.1 kW) gross at 3600 rpm (Q850M and Q850R)

Both engines feature:

• Overhead valve design
  • More horsepower and torque per cubic inch of displacement
  • Better fuel efficiency
• Full-pressure lubrication with full-flow filter
  • Reduces engine wear by ensuring proper lubrication, even when operating on hillsides or uneven terrain
  • Filtered oil reduces risk of contamination for increased engine life
• V-twin design
  • Fast starts
  • Smooth operation
• Vertical shaft for efficient transfer of power to the transmission
• Standard dual-element, canister-type, dry replaceable, heavy-duty air cleaner with secondary safety element
• Fuel pump for consistent and reliable fuel supply to the carburetor
• Air-cooled engine design for minimum maintenance and maximum reliability
• Standard cleanout ports for easy access to remove debris collecting in cooling fins
• Aluminum cylinder block
  • Effectively dissipates heat
  • Lightweight and strong construction
  • Extends engine life due to elimination of debilitating engine temperatures

The engine is equipped with a replaceable oil filter for longer engine life.

Engine oil fill/check tube, oil filter, and oil drain hose are located on the front of the engine where they are easy to access.

Mow all day with 12 U.S. gal. (45.3L) of fuel storage

Dual 6-U.S. gal. (22.7-L) fuel tanks provide 12 U.S. gal. (45.3 L) of fuel storage that eliminates mid-day refueling and the hassle of gas cans.

The fuel tanks are:

• Designed to complement the mower’s styling
• Molded with a low and narrow profile to avoid contact with overhanging obstacles like mailboxes
• Placed so the operator has visibility of the rear tires and mower deck
• Located low to improve stability
• Balanced so the center of gravity doesn’t shift with the fuel level
• Equipped with wide openings that simplify fueling and reduce spills
• Fitted with sealed fuel caps that reduce vapor loss and a tether that prevent misplacing the cap

A fuel gauge on the display panel keeps the operator informed about the amount of fuel remaining in the tank.

A high-quality fuel filter is located where it easy to access and change.

Overview

M and R Series QuikTrakâ„¢ Mowers have 7Iron PRO Mower Decks that are built to last, while delivering a high-quality cut in diverse conditions.

Built to last

The mower deck shell is forged from a single sheet of 7-gauge, 0.179-in. (4.6-mm) steel. There are fewer welds to wear or break than shells built from multiple fabrications.

Rectangular leading-edge reinforcement and rounded corners help distribute impact stress to reduce potential for damage when the mower contacts trees, rocks, curbs, and other fixed obstacles.

The trim edge of the deck is equipped with a bumper that provides extra abrasion resistance to protect the machine and the property.

Three 1-in. (2.5-cm) cold-forged spindle shafts are heat-treated for strength and supported by ball bearings. Deep spindle pockets keep the blades aligned, even after years of tough operation. The ribbed spindle housings are made of aluminum and have an 8-in. (20-cm) base for added strength and heat dissipation.

Exceptional mowing results

Minimal welds provide a smoother underside with fewer sharp corners for reduced material buildup.

Higher blade-tip speed than many competitors - approximately 18,000 fpm (5,486 m/min) for more blade cuts per inch mowed.

A deep-deck design of 5.5 in. (14 cm) delivers excellent airflow so material can be processed quickly and efficiently.

The front edge is raised above the blade plane to allow even cutting of tall grass.

The wider and higher discharge opening provides even clipping dispersal for an excellent finished appearance in all conditions.

Blade overlap is 1.6 in. (40.6 mm) to reduce striping between blades.

Dual-captured anti-scalp wheels provide flotation over the toughest terrain. Anti-scalp wheels are located on both front corners, front center, and rear center. The 72-in. (183-cm) mower deck also has anti-scalp wheels on the rear corners.

Simple to maintain and clean

A folding engine guard provides access to the mower deck drives for cleaning and maintenance.

Spindle covers allow for cleaning while installed and can be removed without tools for maintenance. Spindle grease fittings are accessible through the top of the spindle cover.

Adjustment screws at each lift point are used to level the mower deck side-to-side and set the rake angle. The mower deck is fully supported throughout the leveling process, enabling predictable adjustments and precise height measurements.

Overview

M and R Series QuikTrakâ„¢ Mowers have a spacious operator platform designed to keep operators comfortable and improve stability, while providing storage.

Room to move

Moving is essential for operator ergonomics, so the M and R Series QuikTrak Mowers are equipped with a 24-in. (61-cm) wide foot platform that gives the operator room to vary their stance. The fender-mounted foot holds on R Series Mowers enable an even wider range of stance options.

Smooths out the bumps

The platform is spring loaded to keep bumps from jarring the operator. Large tires help isolate the operator from rough ground as well. R Series Mowers include a rubber mat on the foot platform.

Keeps the operator at center of control

The forward pitch of the new M and R Series leaning pad centers the operator’s core over the vehicles center of rotation. This location has the least centrifugal force, keeping the operator stable and in control. The leaning pad is padded for comfort and bolstered to provide side support to the operator while traversing uneven terrain and during end-of-pass turns. The leaning pad on R Series includes extra bolstering and a color accent.

Traction when you need it

The wide foot platform gives the operator the freedom to shift their weight from side-to-side on uneven terrain. Similarly, the forward-pitched leaning pad allows the operator to lean forward to increase stability or lean rearward to increase traction.

A place for tools and trash

A versatile mesh storage bin is within the operator’s reach and can be used for holding refreshments, tools, or trash.

Overview

The color coded and logically placed controls on M and R Series QuikTrak Mowers are designed to get new operators up to speed quickly. A display panel assists in operating the mower and alerts operators of problems, to reduce downtime and repair costs. The key, choke (carbureted models only), throttle, and power take-off (PTO) switch are located at the operator’s fingertips.

Precise drive controls

Ground speed and direction are easily controlled by moving the two hand-lever hydrostatic drive controls forward or reverse.

• Up to 10 mph (16.1 km/h) forward and 5 mph (8.0 km/h) reverse on M Series Mowers.
• Up to 12 mph (19.3 km/h) forward and 6 mph (9.7 km/h) reverse on R Series Mowers.

Front and rear stationary reference bars stabilize the operator’s hands, which maintains precise control as the mower changes speed or direction. The bars also reduce fatigue from control lever operation.

Control levers return to neutral automatically, and a positive neutral-lock holds the control levers in neutral when the park brake is engaged.

Display panel

The M and R Series QuikTrak Mowers are equipped with a display panel that assists in operating the mower, alerts of problems to reduce downtime and repair costs, and provides on-board diagnostics to speed troubleshooting. The display panel includes:

• Hour meter
• Fuel level
• Engine speed
• System voltage
• Low engine oil-pressure indicator
• Starting interlock indicators for PTO, operator presence, and park brake
• Bright caution and stop indicators to capture the operator's attention

The diagnostics mode provides error codes, system voltage, and circuit continuity tests that can report switch functionality and circuit continuity in seconds without tools.

Park Brake

A park brake is provided for parking the vehicle and for transport. It must be engaged to start the machine and should be engaged whenever the machine is not being used. On M and R Series QuikTrak Mowers, the park brake is built into the transaxles, which reduces the effort required to engage the brake.

Height-of-cut adjustment

An easy-to-use height-of-cut system allows the operator to see and adjust the height-of-cut setting from the operator station.

Hassle-free three-year warranties

The E and M Series QuikTrak mowers have a 1200-hour or 36-month, whichever comes first, bumper-to-bumper warranty. The R Series mowers have a 1500-hour or 36-month, whichever comes first, warranty. All QuikTrak Mowers also have an unlimited hour 24-month warranty. The warranty is hassle free, with John Deere covering the complete machine.

The QuikTrak warranties are also aligned with John Deere’s commercial walk-behind and Z900 ZTrak Mowers so you can roll your entire fleet on one contract, with one warranty duration, and one payment schedule.

Overview

The M and R Series QuikTrak Mowers are designed to speed maintenance and cleaning so the mower can get back to work.

Folding engine guard provides access for engine maintenance

All service and maintenance points are within easy reach.

Canister-type heavy-duty air cleaner is easy to reach and easy to service:

• Air cleaner has two filter elements; a large outer filter and a smaller inner safety filter.
• Both filters are easy to access and easy to change.

Engine oil service points are grouped together in an easy-to-reach location:

• Reduces the time required to check and/or change the oil and filter.

Simple to clean and maintain

A removable leaning pad, removable rear service panel, and folding rear service panel provide access to key components for maintenance and cleaning.

A secure location is provided to protect the battery. Only the leaning pad needs to be removed for access.

Access to check and service the hydrostatic transaxles and drive belts are readily available at the rear of the machine.

Transmission bypass valves are located on the hydrostatic pumps to enable moving the vehicle without the engine running.

A periodic service chart is provided for convenience in keeping up on required service.

Mower deck

Spindle covers allow for cleaning while installed and can be removed without tools for maintenance. Opening the engine guard also provides access to mower deck drives.

Adjustment screws on each lift point are used to level the mower deck side-to-side and set the rake angle. The mower deck is fully supported throughout the leveling process, enabling predictable adjustments and precise height measurements.

Tie-down points

Four tie-down locations, two at the front and two at the rear, are provided for safely towing or anchoring the vehicle.

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 on the rear of the mower, to the right of the leaning pad. The owner information web pages include links to:

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

From the operator's platform to the mower deck, John Deere QuikTrakâ„¢ Mowers have a compact and functional design:

• The compact design allows the QuikTrak to operate in tighter areas that a larger machine cannot. Often, this means the area can be mowed with a QuikTrak so it is not necessary to switch to a walk-behind mower, reducing the time on site.
• With the compact design of QuikTrak Mowers, less space is required on a truck or trailer - which can mean there is room for an extra mower, resulting in less time on property, saving time and money.

Whether mowing hills or on level terrain, trimming or mowing straight-away, the operator of a John Deere QuikTrak is able to affect the performance of the machine with their body:

• The compact design of the QuikTrak allows the operator to use their body to help control the machine
• 24-in. (61-cm) wide foot platform gives the operator the freedom to shift their weight from side-to-side as needed on uneven terrain.
• Fender-mounted foot holds on R Series Mowers enable an even wider range of stance options.
• A forward pitched leaning pad and a deep foot platform allow the operator to lean forward to increase stability or lean rearward to increase traction.
• Faster ground speeds get work done quicker.
• Better traction on slopes gives more control and increased productivity. Superior stability gives more control and confidence when mowing hillsides.
• Better visibility allows more-timely operator reaction to the terrain and obstructions.
• Minimal operator-station obstruction allows safe and fast exits for clearing mower-path obstacles.
• Compact design takes less space for mowing tighter areas and may allow room for an extra machine when hauling to the worksite.

Built upon a strong foundation

The M and R Series QuikTrak Mowers are built upon a fully-welded frame constructed from 1.5-in. x 3-in. (3.8-cm x 7.6-cm) 7-gauge, 0.18-in. (4.6-mm) tubular steel for added strength and durability.

Designed to cross the curb

QuikTrak mowers are frequently used on properties with concrete street curbs. The ability to traverse curbs boosts productivity by reducing transit time. The M and R Series QuikTrak Mowers include the following features that allow for efficient and damage-free curb crossings:

• Angled foot platform geometry that clears a 6-in. (15-cm) curb
• Tall rear tires that can climb a curb with confidence
• Mower deck lift system with elevated transport position
• Center-rear and three front anti-scalp wheels that reduce deck scraping

Large tires provide a smoother ride and increased traction:

• 13x5-6 (M Series) or 13x6.5-6 (R Series) flat-free front caster wheels
• 22x10.5-12 rear pneumatic tires on M Series with 48-in. (122-cm) mower decks
• 22x12-12 rear pneumatic tires on M Series with 54-in. (137-cm) or 60-in. (152-cm) mower decks
• 24x12-12 rear pneumatic tires on R Series

The M and R Series QuikTrakâ„¢ Mowers use Tuff Torq TZT13 Integrated Transaxles, the same transaxles used on the Z900 ZTrakâ„¢ Mowers. The integrated transaxles:

• Include 0.79-cu in. (13-cc) unitized hydraulic pumps combined with 13-cu in. (213-cc) commercial-grade, heavy-duty wheel motors
• Have less potential leak points than separate pump and motor designs
• Enable tall 22- and 24-in. (56- and 61-cm) pneumatic or Tweel drive tires that increase ground speeds and productivity
• Include an internal park brake that need less frequent adjustments than tire-paw designs
• Exceptional cooling in high-load conditions
• Easy-to-check level and refill hydraulic oil

Tuff Torq is a trademark of Kanzaki Kokyukoki Mfg. Co., Ltd.

Key safety features of QuikTrakâ„¢ Mowers include:

• Start circuit requirements
• Park brake engaged
• Power take-off (PTO) disengaged
• Control levers in neutral
• Ignition key used to start the engine
• A high-quality polyethylene mower-discharge deflector
• Deflects if it strikes a solid obstruction, causing less damage
• Returns to its original shape and function
• Operator station designed to allow fast exit
• Easy to remove and replace shields
• Stationary handles on either side of the traction controls for operator security
• Control levers return to neutral when released

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 LED strobe light attachment

The optional LED strobe light attachment increases visibility of the QuikTrak mowers to motorists. The kit includes two lights providing visibility in all directions.

Overview

A JDLinkâ„¢ 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 ZTrakâ„¢ 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 QuikTrakâ„¢ 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.

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.

John Deere leads the commercial zero-turn mower industry with use of the Michelin X Tweel Turf technology for the QuikTrak Mowers:

• 22x11N12 Tweels are a factory-installed option for Q820M and Q850M QuikTrak Mowers.
• 24x12N12 Tweels are a factory-installed option for Q850R and Q865R EFI QuikTrak Mowers.

Michelin is a world leader in tire manufacturing and technology. This airless radial tire solution is an industry first for John Deere, which provides an additional advantage to John Deere operators.

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.
  • 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 for durability.
• 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.

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

John Deere provides application-specific Environmental Protection Agency (EPA) approved field-installed propane conversion kits for specific John Deere commercial walk-behind mowers, QuikTrak Mowers, and commercial ZTrakâ„¢ Mowers. The conversion kits include all components required to convert the engines to operate on propane fuel. Single-tank or dual-tank brackets (depending on the vehicle) are provided for securely holding the propane tank(s) to the vehicle.

Propane tanks are not included.

An optional altitude kit is required when operating at altitudes above 2000 ft (610 m). The operator’s manual with the propane conversion kit provides further details. Parts must be ordered separately through John Deere Parts.

Propane facts:

• Propane is flammable and commonly used as a fuel.
• The molecular formula of propane is C3H8, and it is in the family of liquefied petroleum gases (LP gases). The other LP gases include butane, propylene, butadiene, butylene, isobutylene, and mixtures thereof.
• Propane is commonly available and has proven to be a dependable, safe, economical, and clean-burning fuel. It can be used as household fuel, industrial fuel, and fuel for internal combustion engines. Propane has been used as a fuel since 1910.
• At atmospheric pressure, propane boils at -44°F (-42.2°C), meaning it typically exists as a vapor. However, when contained under pressure, such as in a propane cylinder, it can exist as a liquid.
• Propane is naturally odorless, but includes an additive odorant, usually mercaptan, which gives it a distinct odor.
• Vapor propane is heavier than air, meaning it will settle in low areas such as along the ground or in drains.

 Advantages of John Deere propane conversion kits include:

• Reduced fuel costs up to 30 percent depending on fuel prices
• Lower emissions
• Reduced fuel-system maintenance
• Maintains John Deere warranty
• EPA and CARB certified
• May qualify for national and state rebate and incentive programs.

Propane tank mounting bracket options:

 Optional tank configurations and sizes are available to provide operators the ability to tailor for run time:

• Commercial walk-behind mowers have only a single-tank mounting option.
  • The single-tank bracket is designed for one 20-lb (9.1-kg) Worthington tank.
    • Tank is not included.
• Model year 2023 and older QuikTrak Mowers have single-tank and dual-tank mounting options.
  • The single-tank, right-side bracket is designed for one 33-lb (15-kg) Worthington tank.
    • Tank is not included.
  • The dual-tank brackets are designed for two 20-lb (9.1-kg) Worthington tanks.
    • Tanks are not included.
• Model year 2024 and newer QuikTrak Mowers have only a dual-tank mounting option.
  • The dual-tank brackets are designed for two 33-lb (15-kg) Worthington tanks.
    • Tanks are not included.
• ZTrak Mowers have single-tank and dual-tank mounting options.
  • The single-tank, left-side bracket is designed for one 33-lb (15-kg) or 43-lb (19.5-kg) Worthington tank.
    • Tank is not included.
  • The dual-tank brackets are designed for two 33-lb (15-kg) Worthington tanks.
  • Tanks are not included.
  • ZTrak Mowers with dual-tank configurations are not compatible with any material collection systems.

NOTE: Reference the Propane and Attachment Compatibility Chart to determine tank configurations that are compatible.

Estimated run-time comparison