5100E Utility Tractor

The U.S. EPA and Environment Canada requires all off-road diesel engines with 18.6 kW (25 hp) or more to meet stringent FT4 emissions regulations. John Deere uses the most efficient and cost effective solution for the tractor package to meet emissions requirements at each horsepower level. The 5E delivers a hassle-free emissions solution that allows faster work speeds and operation with ease.

The engine powering the 5E is EPA-certified Tier Level 4. This is achieved through a combination of a diesel oxidation catalyst (DOC) and a selective catalyst reduction (SCR) using diesel exhaust fluid (DEF, or urea).

Several defining features on the 5E maximize the performance and reliability of the emissions package. A completely shielded DOC/SCR not only protects essential components from damage but also keeps out dirt and debris. The well-packaged and tightly organized circulation system means there is more room to work around the tractor.  

PowerTech™ PWL Final Tier 4 engine technology

Key components of the emissions system include:

DOC
Deere has chosen to utilize an exhaust filter (DOC) to reduce particulate material so the engine can operate at a level which produces less nitrogen oxide (NOx). With less NOx created, it requires less DEF to treat. The result is improved total fluid economy (diesel and DEF).

The engine is programmed to aggressively respond to changes in power needs, which can temporarily increase particulate matter. Since the exhaust filter removes particulate matter instead of the engine, the engine is left free to do what it is designed to do – deliver all of the power, torque, plus transient response needed at the exact moment needed.

DEF
DEF is an ISO 22241 standard aqueous urea solution consisting of 32.5 percent urea and has a freezing point of -11° C (12° F). A DEF tank keeps the operator in the field longer even when the temperatures drop below freezing. The DEF tank header is integrated with a temperature sensor and plumbed engine coolant lines are used to promote thawing and prevent freezing in the tank during operation.

DEF tank

Mounted near the DEF tank, the engine control unit (ECU)-controlled supply module draws diesel exhaust fluid from the storage tank and provides a pressurized flow to the dosing module. When the ignition key is off, the supply module pump will reverse direction to return any accumulated fluid back to the tank. The supply module is also fitted with a replaceable filter to prevent contaminants from entering the dosing lines. Both the supply module and dosing lines are electrically heated and controlled by the ECU to determine when diesel exhaust fluid dosing can begin.

The dosing module is cooled by engine coolant and used to inject DEF at a pressure of 900 kPa (130 psi) into the decomposition tube. A harness is connected to the dosing valve that relays the needed DEF to inject based upon the amount of NOx exiting the DOC measured from the NOx tube sensor.

The decomposition tube is the internal mixing device used to circulate DEF with engine exhaust prior to entering the SCR/AOC after-treatment device.

SCR
To reduce the NOx, DEF, or urea, is injected into the exhaust stream. When the exhaust gases combine with the DEF in the SCR catalyst, the NOx is broken down into nitrogen and water vapor.

Shielded for protection

Exhaust gas recirculation (EGR)

How EGR works
EGR reduces the high temperatures where these compounds are formed in the engine cylinders by replacing excess oxygen with a prescribed amount of cooled exhaust gas.

Exhaust gases contain more carbon dioxide than oxygen. The EGR valve, in conjunction with the venturi tube, and ECU, allow a controlled amount of exhaust gas to enter the intake manifold to mix with the incoming fresh air.

Replacing excess oxygen with cooled exhaust gas leads to:

• Lower combustion temperatures, creating less NOx.

In addition, EGR allows for:

• Advanced timing
• Optimal engine performance
• Maximum fuel economy

For added performance and efficiency, the engine passes the exhaust gases through an EGR cooler before it enters the engine.

Exhaust airflow enters into the EGR cooler from the exhaust manifold near the turbocharger. Based on engine load, air temperatures, and rpm, the engine control unit (ECU) opens or closes the EGR valve, allowing a measured percentage of exhaust gas to enter the intake manifold. The gases mix with the rest of the incoming air from the turbocharger and aftercooler before entering the cylinders.

Series turbochargers
The PowerTech PWL 4.5L (274.6-cu in.) engine utilizes one turbocharger — a fixed geometry turbocharger. Fresh air is first drawn into the low-pressure fixed geometry turbocharger and compressed to a higher pressure. The compressed air is then routed to the charge air cooler and then to the intake manifold.

Benefits of air-to-air aftercooling:

• Lowers the intake manifold air temperature
• Provides more efficient cooling while reducing temperatures for greater engine reliability
• Higher volume of air flows into the cylinders
• Engine is capable of meeting the increasing horsepower demands

Combustion process with externally cooled EGR:

Functions: 

• According to engine operating conditions, the recirculated exhaust gases reduce the oxygen portion in the intake air to approximately 20 percent. Without any increase of the charge air pressure, the oxygen rate is not high enough to ensure a complete combustion of the fuel injected at high engine loads.

Advantages:

• Fuel-efficient combustion is achieved, because sufficient oxygen is provided.
  A restrained, cooler combustion is realized, since the typical hot combustion process, which is generated by an oxygen surplus, is dampened by the inert exhaust gases. NOx emissions are reduced.

For more information regarding EPA regulations and the technology behind John Deere Integrated Emissions Control systems please visit the following link:
https://www.deere.com/en/engines-and-drivetrain/final-tier-4-stage-iv/

or

www.deere.ca/en/engines-and-drivetrain/final-tier-4-stage-iv/

This PowrReverser transmission provides 24 forward speeds and 12 reverse (24F/12R) speeds. This transmission comes standard with a dual speed 540/540 Economy power take-off (PTO), and it is ideal for applications requiring frequent directional changes, such as loader work and PTO work like rotary cutting and baling hay.

Hydraulic wet forward and reverse clutches maximize durability and outlast the life of any dry clutch. When tractors are run by multiple operators with a variety of experience levels, a wet clutch is the best way to maintain transmission integrity and performance while decreasing clutch replacement costs.

Two platform-mounted levers offer easy and comfortable shifting. To distinguish the two levers for ease of operation, the gear-shift lever is longer and the less-used range lever is shorter. Unique knobs make it easy to distinguish between the two just by feel.

The hi/lo selector buttons are located on the gear shift lever for each forward gear, and are represented by a rabbit and a turtle respectively. 

The forward lever selects one of four gears.  All are synchronized for on-the-go shifting with the use of the clutch. The rear lever selects one of three ranges: A, B, or C.

Gear shift lever with hi/lo buttons

Maximum productivity is achieved with clutch-less hydraulic shifting between forward and reverse.  PowrReverser functionality is ideal for rear blading and any applications that require frequent directional changes in tight spaces. An electrohydraulic fingertip directional lever control allows the operator to effortlessly switch directions with a small finger motion. The control is located on the left side of the instrument console and selects forward, reverse, and neutral positions. It also allows the operator to steer and shift direction with the left hand, freeing the right hand to operate other tractor controls, such as the loader, rear implements, or hand throttle. The PowrReverser has a built-in engagement override valve for additional safety. This valve requires the clutch pedal to be depressed one time after each engine start before the transmission will begin to operate normally, giving the operator another opportunity to put all focus on the tractor.

A neutral start switch requires the directional lever be in the neutral position to start the engine.

Left-hand reverser lever

The speed of directional changes can be adjusted to the operator's preference or application demands with an optional field installed infinitely variable control kit.

24F/12R transmission includes:

• Wet clutch
• Platform-mounted shift levers with four gears (with hi/lo selector in forward) and three ranges
• Left-hand reverser
• Constant-mesh helical-cut gears
• Pressure-lubricated top shaft
• Positive park pawl
• Neutral start switch

All tractors have economy PTO (E-PTO), a fuel-saving feature which allows customers to operate rear implements at 540 PTO rpm but at lower engine rpm. The result is lower engine vibration, reduced noise, less wear and tear on the engine, reduced fuel consumption and increased operator comfort.

See the PTO functional area for more information on E-PTO.

Every utility tractor producer wants to maximize uptime and appreciates enhanced performance. The cooling package on the Final Tier 4 (FT4) 4-cylinder 5E Tractors allows for easier access to and serviceability of certain critical components. This improvement to serviceability will save time and also enhance tractor performance.

The cooling package features a first-pass screen to catch larger debris, a slide-out condenser (only on cab tractors) a charge air cooler that tilts forward, and a hydraulic oil cooler that slides out halfway to both sides of the tractor.

First pass screen

Slide out condenser on cabs

Charge air cooler tilted forward

The engine is equipped with an electronically controlled fan drive, which means that it only runs as fast as the needs of the tractor demand at that time. This is a fuel-saving device which improves hydraulic cooling and reduces the noise level for the operator. It also positively impacts total fluid efficiency.

An instrument cluster provides more information in a cleaner, more vibrant display. The roll-mode function has the ability to show more diagnostic codes to keep the operator informed about the tractor’s functionality.

This window into tractor functionality and diagnostics provides ample information. Indicators, warning lights, and even gauges are clear and bright. The roll-mode function now provides operators with crucial onboard diagnostics. Engine hours, power take-off (PTO) speed, ground speed, hi-lo indicator, forward, neutral, and reverse are all visible at the same time. There is a light-out indicator for trailer light, turn light, and hazard light bulbs which is driven by updated software. It is a straightforward layout and sleek design with no customer interface required. When operating the PTO, there are clearly presented PTO target bars to indicate the correct PTO speed.

Instrument cluster lights

There are daytime and nighttime modes which are based on the position of the light switch. The mode adjusts the backlight levels of the display for optimum visibility.

AL212683 tie-rod assembly with mounting plates

PF80459 117.6-mm (4.63-in.) tie-rod assembly

PF80460 38.1-mm (1.5-in.) ball mount on U-bolt

RE574454 76.2-mm (3-in.) tie-rod assembly with 38.1-mm (1.5-in.) ball on round mounting plate

UC17356 38.1-mm (1.5-in.) ball mount on universal square

RE558821 25.4-mm (1-in.) ball mount on 10-mm (0.4-in.) stud

AXE59372 clamp-style accessory mounting bracket

BRE10482 25.4-mm (1-in.) T-slot ball mount assembly (left) and BRE10483 38.1-mm (1.5-in.) T-slot ball mount assembly

There are a variety of additional mounting part solutions available through John Deere to resolve unique mounting configuration needs. The table below includes several additional parts (not shown above) to aid in many different mounting needs.

AL212683 tie-rod assembly with mounting plates

PF80459 117.6-mm (4.63-in.) tie-rod assembly

PF80460 38.1-mm (1.5-in.) ball mount on U-bolt

RE574454 76.2-mm (3-in.) tie-rod assembly with 38.1-mm (1.5-in.) ball on round mounting plate

UC17356 38.1-mm (1.5-in.) ball mount on universal square

RE558821 25.4-mm (1-in.) ball mount on 10-mm (0.4-in.) stud

AXE59372 clamp-style accessory mounting bracket

BRE10482 25.4-mm (1-in.) T-slot ball mount assembly (left) and BRE10483 38.1-mm (1.5-in.) T-slot ball mount assembly

There are a variety of additional mounting part solutions available through John Deere to resolve unique mounting configuration needs. The table below includes several additional parts (not shown above) to aid in many different mounting needs.

AL212683 tie-rod assembly with mounting plates

PF80459 117.6-mm (4.63-in.) tie-rod assembly

PF80460 38.1-mm (1.5-in.) ball mount on U-bolt

RE574454 76.2-mm (3-in.) tie-rod assembly with 38.1-mm (1.5-in.) ball on round mounting plate

UC17356 38.1-mm (1.5-in.) ball mount on universal square

RE558821 25.4-mm (1-in.) ball mount on 10-mm (0.4-in.) stud

AXE59372 clamp-style accessory mounting bracket

BRE10482 25.4-mm (1-in.) T-slot ball mount assembly (left) and BRE10483 38.1-mm (1.5-in.) T-slot ball mount assembly

There are a variety of additional mounting part solutions available through John Deere to resolve unique mounting configuration needs. The table below includes several additional parts (not shown above) to aid in many different mounting needs.

AL212683 tie-rod assembly with mounting plates

PF80459 117.6-mm (4.63-in.) tie-rod assembly

PF80460 38.1-mm (1.5-in.) ball mount on U-bolt

RE574454 76.2-mm (3-in.) tie-rod assembly with 38.1-mm (1.5-in.) ball on round mounting plate

UC17356 38.1-mm (1.5-in.) ball mount on universal square

RE558821 25.4-mm (1-in.) ball mount on 10-mm (0.4-in.) stud

AXE59372 clamp-style accessory mounting bracket

BRE10482 25.4-mm (1-in.) T-slot ball mount assembly (left) and BRE10483 38.1-mm (1.5-in.) T-slot ball mount assembly

There are a variety of additional mounting part solutions available through John Deere to resolve unique mounting configuration needs. The table below includes several additional parts (not shown above) to aid in many different mounting needs.

AL212683 tie-rod assembly with mounting plates

PF80459 117.6-mm (4.63-in.) tie-rod assembly

PF80460 38.1-mm (1.5-in.) ball mount on U-bolt

RE574454 76.2-mm (3-in.) tie-rod assembly with 38.1-mm (1.5-in.) ball on round mounting plate

UC17356 38.1-mm (1.5-in.) ball mount on universal square

RE558821 25.4-mm (1-in.) ball mount on 10-mm (0.4-in.) stud

AXE59372 clamp-style accessory mounting bracket

BRE10482 25.4-mm (1-in.) T-slot ball mount assembly (left) and BRE10483 38.1-mm (1.5-in.) T-slot ball mount assembly

There are a variety of additional mounting part solutions available through John Deere to resolve unique mounting configuration needs. The table below includes several additional parts (not shown above) to aid in many different mounting needs.

AL212683 tie-rod assembly with mounting plates

PF80459 117.6-mm (4.63-in.) tie-rod assembly

PF80460 38.1-mm (1.5-in.) ball mount on U-bolt

RE574454 76.2-mm (3-in.) tie-rod assembly with 38.1-mm (1.5-in.) ball on round mounting plate

UC17356 38.1-mm (1.5-in.) ball mount on universal square

RE558821 25.4-mm (1-in.) ball mount on 10-mm (0.4-in.) stud

AXE59372 clamp-style accessory mounting bracket

BRE10482 25.4-mm (1-in.) T-slot ball mount assembly (left) and BRE10483 38.1-mm (1.5-in.) T-slot ball mount assembly

There are a variety of additional mounting part solutions available through John Deere to resolve unique mounting configuration needs. The table below includes several additional parts (not shown above) to aid in many different mounting needs.

BRE10255 tablet mount assembly (1), BRE10015 cell phone mount assembly (2), and RE343680 L-shaped mounting bracket (3)

BRE10152 self-leveling cup holder assembly

BXE10606 locking suction mount cell phone assembly

BXE10607 locking suction mount tablet assembly

BRE10255 tablet mount assembly

BXE10864 tablet mount assembly

Mounting a tablet, cell phone, or beverage can be easily done with these solutions. These strong and simple-to-use solutions keep all important items right where they are wanted.

Cell phones, tablets, and other devices are key tools for farming today. John Deere has now made it easier than ever to incorporate these tools into the operator's station.

Stay connected with the RAM® cell phone and tablet mounts. John Deere offers a vast selection of adjustable accessory mounting solutions and media devices to fit every need and application.

Mounting bracket with cell phone and tablet mount

Mounting bracket with cell phone and tablet mount

RAM is a trademark of National Products Inc.

Cell phones, tablets, and other devices are key tools for farming today. John Deere has now made it easier than ever to incorporate these tools into the operator's station.

Stay connected with the RAM® cell phone and tablet mounts. John Deere offers a vast selection of adjustable accessory mounting solutions and media devices to fit every need and application.

Mounting bracket with cell phone and tablet mount

Mounting bracket with cell phone and tablet mount

RAM is a trademark of National Products Inc.

BRE10255 tablet mount assembly (1), BRE10015 cell phone mount assembly (2), and RE343680 L-shaped mounting bracket (3)

BRE10152 self-leveling cup holder assembly

BXE10606 locking suction mount cell phone assembly

BXE10607 locking suction mount tablet assembly

BRE10255 tablet mount assembly

BXE10864 tablet mount assembly

Mounting a tablet, cell phone, or beverage can be easily done with these solutions. These strong and simple-to-use solutions keep all important items right where they are wanted.

Powerstrip in 5025 Series Cab Tractor

A powerstrip provides the operator with an additional six outlets providing key-switched and unswitched power that works simply by rotating the position of the plug 180 degrees.

For those concerned about the security of their cab tractor, a custom key is available.

A favorite worldwide, the RAM self-leveling cup holder is now available as a kit - designed specifically for Deere equipment. It is easily installed to keep your favorite beverage upright even in the roughest terrain. The perfect accessory for any cab that has 10-mm mounting bosses.

Self-leveling cup holder John Deere branded beverage insulator included

The new cup holder features a unique self-leveling design. This pivoting design allows easy adjustment for the holder while offsetting motion of the vehicle when moving.

Features and applications:

• Self-leveling action reduces spills
• Durable design for rough environments
• Easy adjustable mounting for ideal placement
• Includes John Deere branded beverage insulator
• Compatible with most monitor brackets and all 10-mm threaded bosses

BRE10255 tablet mount assembly (1), BRE10015 cell phone mount assembly (2), and RE343680 L-shaped mounting bracket (3)

BRE10152 self-leveling cup holder assembly

BXE10606 locking suction mount cell phone assembly

BXE10607 locking suction mount tablet assembly

BRE10255 tablet mount assembly

BXE10864 tablet mount assembly

Mounting a tablet, cell phone, or beverage can be easily done with these solutions. These strong and simple-to-use solutions keep all important items right where they are wanted.

BRE10255 tablet mount assembly (1), BRE10015 cell phone mount assembly (2), and RE343680 L-shaped mounting bracket (3)

BRE10152 self-leveling cup holder assembly

BXE10606 locking suction mount cell phone assembly

BXE10607 locking suction mount tablet assembly

BRE10255 tablet mount assembly

BXE10864 tablet mount assembly

Mounting a tablet, cell phone, or beverage can be easily done with these solutions. These strong and simple-to-use solutions keep all important items right where they are wanted.

Implement hitch pins and bushings adapt Category 1 implements to fit a Category 2 3-point hitch.

Implement hitch pins and bushings adapt Category 1 implements to fit a Category 2 3-point hitch.

Offset drawbar

Offset drawbars can be used with large- or small-diameter tires to raise or lower the drawbar height.

Straight drawbar clevis kit

The offset drawbar clevis kit allows quick, no-hassle, safe hookups to many popular drawn implements.

4-cylinder 5E Final Tier 4 (FT4) side exhaust

The field-installed side exhaust solution provides a low, horizontal exhaust position for producers operating in applications where a low exhaust point is required, such as orchards and poultry. This kit is available on the 4-cylinder 5E FT4 compliant standard tractors (5085E and 5100E) and is compatible with cab and open operator station tractors.

Front fenders installed on a 5M Tractor

Mechanical front-wheel drive (MFWD) front fenders protect operators and the 4WD tractor from debris thrown by the front tires, especially when going from severe conditions to transport speeds.

The fenders are not compatible with loaders. LVB25776 mounting bracket and hardware kit must be ordered separately.

Front fenders installed on a 5M Tractor

Mechanical front-wheel drive (MFWD) front fenders protect operators and the 4WD tractor from debris thrown by the front tires, especially when going from severe conditions to transport speeds.

The fenders are not compatible with loaders. LVB25776 mounting bracket and hardware kit must be ordered separately.

Front fenders installed on a 5M Tractor

Mechanical front-wheel drive (MFWD) front fenders protect operators and the 4WD tractor from debris thrown by the front tires, especially when going from severe conditions to transport speeds.

The fenders are not compatible with loaders. LVB25776 mounting bracket and hardware kit must be ordered separately.

R262449 front weight support for 10 suitcase weights

Overview

R262449 is a cast-iron front weight support that allows for up to 10 suitcase weights to be added to the front of the tractor for proper ballasting. The weight bracket weighs approximately 55 kg (121 lb), and Quik-Tatch™ weights can be easily added for additional ballast. Each front suitcase weight weighs approximately 43 kg (95 lb).

See the ballasting and optimizing performance section or the tractor operator's manual for additional ballasting information.

Additional details

NOTE: The front weight bracket is compatible with the hood and brush guards also installed.

R262449 front weight support for 10 suitcase weights

Front suitcase weight

One suitcase weight of 43 kg (95 lb).

Hood guard for 5M Series Tractors

The heavy-duty hood guard is compatible with 5R Tractor series.

The basic function of a hood guard is to:

• Help protect the tractor grille and hood from falling debris or stationary objects such as a wagon or mixer
• Allow for lighting at night

The hood guard:

• Can be used with or without the tractor front weight bracket but not with the actual front weights while using the loader (this would overload the front axle)

It is highly recommended to purchase a front weight bracket when using a loader. The hood guard is designed to be slightly rearward of the front weight bracket. This is so the front weight bracket is the first point of contact against lower stationary objects.

The features of the hood guard include:

• Allow the hood to open and provide access to the battery and filter
• Extra steel behind the mainframe to increase strength
• High height to better protect the top of the hood

Rear work light

A 37.5-W halogen floodlight is adjustable and illuminates areas to the rear of the tractor.

The bulb can be easily replaced as needed.

Telescopic mirror mounted on 5020 Series Cab

Telescopic mirror mounted on 5M Open Station

Telescopic rearview mirrors provide operators with a wide rear view of the field or road. These mirrors are especially useful when towing wagons or large implements.

The mirrors are adjusted manually and telescope.

NOTE: If mounting mirrors on the 5M Open-Station Tractors, one RE244177 rearview mirror mounting kit is needed for each side.

Telescopic mirror mounted on 5020 Series Cab

Telescopic mirror mounted on 5M Open Station

Telescopic rearview mirrors provide operators with a wide rear view of the field or road. These mirrors are especially useful when towing wagons or large implements.

The mirrors are adjusted manually and telescope.

NOTE: If mounting mirrors on the 5M Open-Station Tractors, one RE244177 rearview mirror mounting kit is needed for each side.

Telescopic mirror mounted on 5020 Series Cab

Telescopic mirror mounted on 5M Open Station

Telescopic rearview mirrors provide operators with a wide rear view of the field or road. These mirrors are especially useful when towing wagons or large implements.

The mirrors are adjusted manually and telescope.

NOTE: If mounting mirrors on the 5M Open-Station Tractors, one RE244177 rearview mirror mounting kit is needed for each side.

Standard canopy

Deluxe canopy

The canopy attaches to the open operator station rollover protective structure (ROPS).
The 1613.2-mm (63.5-in.) long, 1322.7-mm (52-in.) wide ABS canopy  can offer protection to the operator from inclement weather and direct overhead sunlight.

NOTE: Additional mounting brackets are required to adapt the canopy (LVB25334) to ROPS. See ordering information below.

NOTE: Deluxe canopy (LVB25785) includes additional headliner and marker lights for select open station models and also requires LVB25332.

Stationary fenders (Quik-Tatch)

Stationary fenders are fixed to the loader mounting frames and therefore do not pivot when the tractor tires turn.

Stationary fenders offer several key advantages over traditional fenders:

• The turning radius of the tractor is not reduced when a loader is installed
• Fenders can be used with the tallest tires with a loader at any tread setting
• Less fender damage occurs because the fender never becomes the widest part of the tractor when turning next to fences or walls
• The fenders can be easily removed to make servicing the tractor easier
• The height of the fender can be adjusted based on the height of the tire
• Mud coverage is not compromised

150-kg (330.7-lb) wheel weight for 61-cm (24-in.) wheel

Overview

• The 150-kg (330-lb) cast rear wheel weight (SU57513) provides the proper amount of rear axle ballast for a variety of applications.

Benefits

• The addition of ballast will increase traction on the rear axle of the tractor.
• Wheel weights can also be used to counterbalance the effect of adding additional weight on the front axle of the tractor in the form of front weight support, front hitch, front spray tanks, or front-end loaders.

Additional details

• Maximum of one per side
• Can use additional R213907 wheel weight
• Will not fit on interior of wheel
• Quantity of one

Rear-wheel weight

For improved traction and/or ballast, 95-lb rear-wheel weights can be installed.

See the ballasting and optimizing performance section in the sales manual or the tractor's operator's manual for additional ballasting information.

Quick-coupler

The second-generation iMatch™ quick-hitch allows a no-hassle attachment option for many integral implements such as box blades, rear blades, rotary tillers, and rotary cutters. The hitch is constructed of tubular and box-welded steel, and the bushings and hooks are heat-treated to prevent cracking for long wear life. Hardened, zinc-plated steel alloy pins take the shock of heavy loads and withstand exposure to the elements. Hitch locking handles rotate 100 degrees to open the locking lugs for easy implement release. The top link is adjustable for compatibility and versatility.

This attachment is only available through Parts.

Axle extensions are required to achieve tread settings greater than 78.7 in. on eight-position wheels.

Axle extensions are required to achieve wider tread settings.

Axle extensions are required to achieve wider axle tread settings.

Axle extensions are required to achieve wider axle tread settings.