John Deere Th 6x4 diesel utility vehicle

The Gatorâ„¢ TH 6x4 Diesel Utility Vehicle is powered by a 13.6-kW (18.2-hp)*, 993-cc (60.6-cu in.), 3-cylinder, liquid-cooled, four-cycle diesel engine.

*The engine horsepower information is provided by the engine manufacturer to be used for comparison purposes only. The actual operating horsepower will be less.

The engine offers the following performance and reliability features:

• Overhead valve design for greater efficiency and fuel economy
• Full-pressure lubrication system with replaceable oil filter 
• Dry replaceable single-element air cleaner with remote intake
• Indirect injection diesel with glow plugs insures fast starts in cold temperatures
• Spark arresting muffler (optional)
• Dual radiator system for additional cooling capacity
• Deaeration tank decreases service time and ensures coolant will be free from trapped air
• 18.9 L (5 U.S. gal.) fuel tank capacity

Dual radiator system

• Two radiators - one under the seat and one under the hood
• Overflow bottle added under the hood
• Single under-hood fill point for the entire cooling system
• Increases vehicle cooling capacity by 30 percent to handle high ambient temperature conditions
• Decreased occurrence of cooling system vapor lock by moving the front radiator to a high point in the system and having an overflow bottle

The Gatorâ„¢ TH 6X4's power is transmitted from the transaxle to the center axle. The rear axle is driven by roller chains from the center axle.

1. High-flotation tires
2. Transaxle
3. Chain drive
4. Engine
5. Variable-speed drive

Key elements of the drive system are as follows:

Variable-speed drive

The variable-speed drive consists of two clutches connected by a drive belt:

• Drive clutch is attached to and rotated by the engine.
• Driven clutch is attached to and drives the transaxle.

Features include:

• Infinite selection of speeds (0 km/h to 32 km/h [0 mph to 20 mph])
• No shifting necessary as operator increases speed
• Adjusts speed to the load to avoid bogging down when going up a hill or through challenging conditions because the wrong gear was selected

1. Idle sped
2. Moderate speed
3. High speed
4. Drive clutch
5. Driven clutch

Here is how the variable-speed drive works:

1. As the engine speed increases, the spring-loaded drive clutch is closed by weights being forced out by centrifugal force.
2. As the drive clutch closes, the belt rides up to the largest diameter of the drive clutch and forces open the driven clutch.
3. With the belt running in the smallest diameter of the driven clutch, the speed being transferred to the transaxle is increased.
4. The driven clutch is designed to sense varying loads (inclines, mud, etc.) and constantly adjusts the drive speed upward or downward, so the engine rpm remains constant at constant throttle position.

Transaxle

The transaxle is fully enclosed and runs in oil for reliability. Helical gears are used for quiet operation. The differential design reduces scuffing of the turf during turns because the inside wheels turn slower than the outside wheels (vehicles that have a solid axle shaft must skid the inside wheel when making a turn).

Traction assist (differential lock) is built into the transaxle:

• Allows locking the rear drive wheels together
• Provides increased traction in tough spots

The neutral start safety interlock is provided for the engine ignition system.

Bolt-on cast-aluminum rear axle housings provide an extremely strong supporting structure.

• Large, sealed bearings are located inside the housing for better protection
• Forged splined shaft for increased torsional strength

Numerous features offer the operator and passenger a comfortable ride and provide many operating conveniences.

• Side-by-side bucket seating provides room for one operator and one passenger
• Hip restraints serve as a handhold and help to keep the operator and passenger in their seats over rough terrain
• Both seats tilt forward for dry storage and ease of service
• Choice of adjustable or non-adjustable driver's seat
• Hour-meter is standard to assist in maintaining regular service intervals
• Integrated cupholders
• 12-V outlet located on instrument panel

The control location and walk-through platform provide easy entry/exit for operator and passenger.

NOTE: Shown above with the optional front bumper, brush guard, front fender guard, and floor mat.

NOTE: The front bumper is standard on the Gatorâ„¢ TH 6X4 Diesel.

• All models feature a park brake indicator light, hour-meter, and tank-mounted fuel gauge as standard equipment
• Traction assist (differential lock) is hand operated and conveniently located between the operator and passenger seats
• Traction assist indicator light (Gator TH 6X4 only)
• Glove box is located in the dash to provide a convenient storage area for small tools and the operator's manual
• Grab bar is provided for the passenger
• Center-mounted key switch
• Additional storage is provided between the seats

The deluxe cargo box consists of a 15 percent glass-filled polypropylene composite material that eliminates rust, dents, and reduces noise. The cargo box floor and front panel are made of steel.

Deluxe cargo box tailgate

The tailgate can be opened or removed to ease clean out and to carry longer items. The tailgate features truck-like performance and can be operated with one hand.
 
The standard installed lanyards can also be removed to lower the tailgate to 150 degrees for convenient loading and unloading tasks.

Deluxe cargo box tilt

The deluxe cargo box is easy to latch, unlatch, raise, and lower using a handle that’s built into the cargo box.

• On TX, TX Turf, and TE vehicles the cargo box latch is integrated into the lift handle.
• On TH vehicles, the cargo box latch is located on the front of the cargo box.

A prop rod is provided to hold the box in the upright position for operator convenience, as well as limit box pivot travel.

Integrated tie-down points

The deluxe cargo box offers integrated tie-down points for increased versatility. Tie down points are located in the following areas:

• Four corners inside the cargo box bed
• Four points on the load guard directly behind the operator station (A)
• Tie-down bars on either side of the cargo box (B)
• Six points on the underside of the cargo box frame (circled)

Converting deluxe cargo box to a flat bed

The deluxe cargo box easily converts to a flatbed by removing ten bolts and unplugging rear lights (if equipped) at the harness pigtail at the rear of the machine. The flatbed configuration allows loading larger and irregularly shaped cargo.

Comfort and convenience packages

T-Series vehicles are ordered with a comfort and convenience package, which includes factory-installed optional equipment.

Optional accessories

Attachments for field conversion are also available to upgrade lighting and add equipment. Optional accessories for the deluxe cargo box include:

• Cargo box bed mat
• Cargo box power lift
• Side tool rack
• Cargo box divider
• 5-gal. (19-L) bucket holder
• Cargo box extender
• Cargo box side extensions
• Taillight protectors
• Side- and top-opening toolboxes
• Lighting kits

Cargo box specifications

CAUTION: Carrying extra-long cargo that extends beyond the box can adversely affect stability.

Overview

A JDLink™ M Modem connects a utility vehicle to the John Deere Operations Center, which enables you to manage your fleet of John Deere equipment more efficiently, increase productivity, and reduce labor costs. Whether you’re a farmer, professional landscaper, or municipality, with a modem and Operations Center, you are always connected to the work in progress and keep track of your utility vehicles, commercial mowers, tractors, and farm equipment.

JDLink M Modem

A JDLink M Modem is a factory-installed option for model year 2026 and newer one-row full-size XUV vehicles. A modem is included on vehicles ordered with GreenStarâ„¢ and AutoTracâ„¢ ready option codes as well.

A modem can be field installed on the following vehicles:

• Model year 2018 and newer TS, TX, TX Turf, TH Gas, and TH Diesel
• GX Electric and GX Electric Crew
• Model year 2018 and newer HPX 615E and 815E
• Model year 2018 and newer XUV 560E, 560E S4, 590E, 590E S4, 590M, and 590M S4
• Model year 2018 and newer XUV 825E, 825M, 825M S4, 855E, 855M, and 855M S4
• XUV 835E, 835M, 835R, 865E, 865M, and 865R
• XUV 845M, 845R, 875M, and 875R

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 equipment data. The connected features vary by vehicle model.

Location and status

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

• Location history-Display of map with current and past locations of each vehicle.
• Speed-Maps each vehicle’s current speed, so you can target operator training.
• Hours of operation-Reports the time of day the vehicle has been operated.
• Geofencing-Alerts when a vehicle enters or exits a prescribed area, for example if the vehicle has been stolen or an operator entered a prohibited area.
• Curfews-Alerts if the vehicle is operating outside prescribed times.

Engine hours

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

• Sync-The vehicle 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 hours the vehicle spent working and idling. 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 vehicle’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.

The following chart shows the ethernet cable and switch kits needed to connect a display to a JDLink modem to transmit precision ag technology data to Operations Center:

* Nothing is needed because factory GreenStar and AutoTrac include connected modem.

**Factory-installed AutoTrac started with model year 2023 and factory-installed GreenStar ready started with model year 2025.

BUC11879 ethernet cable and BUC11874 ethernet switch are expected to be available by Fall 2025.

Compatibility

A JDLink Modem is included on:

• Model year 2023 to 2025 vehicles ordered with option code 183E JDLink Modem. Option code 183E was only available with, and required on, GreenStar ready and AutoTrac ready vehicles.
• Model year 2026 and newer vehicles ordered with option code 183N JDLink M Modem. Option code 183N can be ordered as a stand-alone option and is required on GreenStar ready and AutoTrac ready vehicles.

A JDLink M Modem can be field installed on the Gator Utility Vehicles listed below. Field installation attachments simplify modem installation, and include 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.

*The TE Electric and XUV 845E models do not support installation of a JDLink Modem.

**Installation attachments are expected to be available by Fall 2025.

Ethernet cable and switch kits

On model year 2026 and newer XUV 845M, 845R, 875M, and 875R vehicles, the optional BUC11879 ethernet cable connects a JDLink M Modem to a Generation 4 or 5 display which enables the JDLink M Modem to transmit precision ag technology data to Operations Center.

• Only vehicles equipped with a BUC11814 display and receiver integration kit benefit from BUC11879 ethernet cable since factory-installed GreenStar and AutoTrac ready options include this functionality.
• Model year 2025 and older vehicles are not compatible with BUC11879 ethernet cable.

Model year 2026 vehicles with a generation 4 display (4240 or 4640) also require a BUC11874 ethernet switch to adapt the generation 4 display. This applies to vehicles with factory-installed GreenStar ready option, factory-installed AutoTrac ready option, and vehicles with a BUC11814 display and receiver integration kit.