John Deere 125 Automatic : Parts, Manuals, Diagrams, Specs

March 13, 2025 John Deere, John Deere Mower Parts, John Deere Mowers, John Deere Parts, John Deere Parts Diagrams, John Deere Parts Manual PDF, John Deere Tractors, Tractors Comments Off on John Deere 125 Automatic : Parts, Manuals, Diagrams, Specs
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John Deere 125 automatic

The John Deere 125 is a versatile utility tractor designed for various applications. It features a John Deere PowerTech EWL engine with a displacement of 4.5 liters and a rated engine power of 125 horsepower (92 kW). The maximum engine power reaches 138 horsepower (101 kW), with an additional 20 horsepower boost available through Intelligent Power Management (IPM) in non-stationary PTO and transport applications.

This tractor offers multiple transmission options, including the standard 24-speed PowrQuad Plus and optional AutoQuad Plus, CommandQuad Plus, and AutoPowr/IVT transmissions. The AutoQuad PLUS transmission allows for automatic shifting of four power shift gears, enhancing operational efficiency.

The 6M 125 model is part of the 6M series, which includes 18 models with five frame sizes ranging from 2400mm to 2900mm. It is designed for maximum maneuverability and visibility, featuring a sloped hood design on 2400mm wheelbase cab models for superior front loader visibility.

The hydraulic system offers options for both pressure-compensated and pressure-and-flow compensated systems, with pump rated outputs of 80 L/min (standard) or 114 L/min (optional). The rear hitch is category 2/3N, with a standard lift capacity of 2750 kg, upgradable to 3600 kg.

For PTO operations, the tractor provides 540 and 1000 PTO speeds, with the engine running at 1977 rpm and 1972 rpm respectively. The PTO is electrohydraulically operated with an oil-cooled, multi-disc design.

The John Deere 125 comes equipped with various modern features such as AutoTrac, AutoPath, and Section Control technology solutions. These features contribute to improved field efficiency, reduced input costs, and overall productivity enhancement in agricultural operations.

John Deere 125 automatic Specs

The John Deere 125 utility tractor is equipped with a John Deere PowerTech EWL engine. This 4.5-liter engine delivers a rated power of 125 horsepower (92 kW) and a maximum power of 138 horsepower (101 kW). The tractor features Intelligent Power Management (IPM), providing an additional 20 horsepower boost in transport and mobile PTO applications.

The standard transmission is a 24-speed PowrQuad Plus with a maximum speed of 40 km/h. Optional transmissions include a 16-speed PowrQuad Plus, 24-speed AutoQuad Plus, 24-speed CommandQuad Plus, and AutoPowr/IVT, with some options offering speeds up to 50 km/h. A creeper option is available for PowrQuad Plus and AutoQuad Plus transmissions.

The hydraulic system offers two options: a standard pressure-compensated (PC) system and an optional pressure-and-flow compensated (PFC) system with Load Sensing function. The standard pump output is 80 L/min (21 gpm), with an optional 114 L/min (30 gpm) pump available.

The rear hitch is category 2/3N with a standard lift capacity of 2750 kg (6057 lb), upgradable to 3600 kg (7930 lb). The PTO is electrohydraulically operated with 540 and 1000 rpm speeds available. At rated PTO speeds, the engine runs at 1977 rpm for 540 PTO and 1972 rpm for 1000 PTO.

The base machine weight is 6250 kg (13,779 lb). Tire options include 380/85R24 for the front and 460/85R34 for the rear, though specific sizes may vary based on configuration.

The tractor features a comfortable cab with options for seat suspension and cab suspension. It includes a cornerpost display for performance monitoring and individual settings. The cab is equipped with standard AM/FM stereo and offers optional features like an instructional seat and mechanical cab suspension.

The John Deere 125 can be equipped with advanced features such as integrated AutoTrac guidance, which helps reduce overlap and improve efficiency in field operations. It’s compatible with John Deere’s precision agriculture solutions, enhancing productivity and reducing input costs.

John Deere 125 automatic Prices

The John Deere 6M 125 tractor, a popular model in the utility tractor segment, comes with various pricing options depending on the configuration and features selected. As of 2025, the starting price for a John Deere 6M 125 with a 50kph AutoQuad transmission is £106,932. This base price can increase significantly with additional options and upgrades.

The choice of transmission can affect the overall price of the John Deere 6M 125. While the PowrQuad Plus is the standard transmission, opting for more advanced options like the AutoQuad Plus, CommandQuad Plus, or AutoPowr/IVT can increase the price. These transmissions offer enhanced performance and ease of use, which may justify the additional cost for some buyers.

For those looking for more budget-friendly options, used John Deere 125 models are available at varying price points. The cost of a used model depends on factors such as age, condition, hours of use, and included features. While specific prices for used models can vary widely, they generally offer a more affordable entry point to John Deere ownership.

It’s important to note that the John Deere D125 is a different product from the 6M 125 tractor. The D125 is a riding lawn mower designed for residential use. Pricing for new D125 lawn mowers is significantly lower than the 6M 125 tractor, typically ranging from £2,000 to £2,500 depending on the specific model and features.

Several factors can influence the final price of a John Deere 125, including:

  1. Optional features and attachments

  2. Dealer location and competition

  3. Current market demand

  4. Seasonal promotions or discounts

  5. Trade-in value of existing equipment

Potential buyers should consult with local John Deere dealers for the most accurate and up-to-date pricing information, as prices can vary based on region and specific dealer policies.

John Deere 125 automatic Finance Options

The hire purchase option allows you to own the John Deere 125 automatic tractor while spreading the cost over time. This financing method enables you to claim capital allowances and enjoy ownership privileges with a repayment structure tailored to your needs. The tractor becomes yours after completing all payments.

Finance leasing is an alternative that provides use of the John Deere 125 automatic without full ownership. This option can be cost-effective for funding the tractor over a fixed term. It may offer lower monthly payments compared to hire purchase, making it attractive for businesses looking to manage cash flow.

These options allow you to use the John Deere 125 automatic for a fixed term without owning it. They can be particularly beneficial if you prefer to update your equipment regularly or if you need the tractor for a specific project duration.

John Deere frequently provides special financing offers for their equipment. As of March 2025, there are attractive deals available:

  • 0% APR fixed rate for 60, 72, or 84 months on select models

  • Cash purchase discounts of up to $5,500 on certain tractors

  • Low APR options, such as 0.9% for 36 months on some models

John Deere Financial offers payment plans that can be customized to match your business’s seasonal cash flow. This flexibility can be particularly beneficial for agricultural and construction businesses with fluctuating income throughout the year.

This option allows you to finance not just the tractor itself, but also parts, service, attachments, rentals, and technology. It’s a comprehensive solution that can help manage various aspects of equipment ownership and operation.

If you’re considering a used John Deere 125 automatic, financing options are also available for pre-owned equipment through John Deere Financial, often with competitive rates.

Remember to consult with your local John Deere dealer for the most current financing options and to determine which solution best fits your specific needs and circumstances.

John Deere 125 automatic Parts

The John Deere 125 automatic includes essential engine-related parts such as oil filters, air filters, fuel filters, and spark plugs. These components are critical for maintaining engine performance and ensuring efficient fuel delivery.

Key transmission parts include drive belts, traction belts, and pulleys. These are vital for smooth operation and transferring power from the engine to the wheels. Regular inspection and replacement of these parts can prevent wear and tear.

For models equipped with mower decks, parts such as cutting blades, deck belts, leveling gauges, and mulching kits are available. These components ensure optimal cutting performance and allow customization for mulching or bagging operations.

The electrical system includes ignition switches, batteries, headlight bulbs, and wiring components. These parts are necessary for starting the tractor, powering accessories, and maintaining visibility during operation.

Hydraulic system parts include pumps, hoses, valves, and fluid reservoirs. These are essential for operating attachments and ensuring smooth hydraulic performance.

Replacement wheels, tires, bearings, and bushings are available to maintain stability and maneuverability. Upgrades such as front wheel bearings can enhance durability compared to standard bushings.

For tractors with cabs, accessories like seat cushions, suspension systems, mirrors, and control panels can be replaced or upgraded to improve operator comfort.

Additional components include fuel caps, gage wheels, safety switches, and maintenance tools like grease guns. These items support routine maintenance and ensure safe operation.

Parts for the John Deere 125 automatic are widely available through authorized dealers, online retailers, and specialized suppliers. Buyers should verify compatibility using the tractor’s serial number before purchasing replacements or upgrades.

John Deere 125 automatic Manual

The John Deere 125 automatic tractor comes with a comprehensive operator’s manual that provides essential information for safe and effective operation. This manual is an integral part of the machine and should remain with it even if sold.

The manual emphasizes safety as a top priority. It includes detailed safety messages, instructions on proper use of controls, and guidelines for avoiding personal injury or machine damage. Operators are strongly advised to read and understand all safety information before operating the tractor.

Detailed explanations of all controls, including the transmission, hydraulic system, and PTO, are provided. The manual offers step-by-step instructions on starting, operating, and shutting down the tractor. It also covers proper use of attachments and implements.

Regular maintenance procedures are outlined, including lubrication points, fluid checks, and filter replacements. The manual provides a maintenance schedule to help keep the tractor in optimal condition. It also includes troubleshooting guides for common issues.

Technical specifications of the John Deere 125 automatic are listed, covering engine details, hydraulic system capacities, and electrical system information. Instructions for making various adjustments, such as mower deck leveling, are also included.

Information on compatible attachments and their proper use is provided. This includes installation instructions and operating guidelines for implements like mower decks, snow blowers, and front loaders.

The manual offers guidance on proper storage procedures for both short-term and long-term periods. It also includes instructions for safely transporting the tractor.

While specific warranty terms may vary, the manual typically includes general warranty information and guidelines for obtaining service from authorized John Deere dealers.

Remember to keep your operator’s manual accessible and refer to it regularly to ensure safe and efficient operation of your John Deere 125 automatic tractor.

John Deere 125 automatic Parts Diagram

The John Deere 125 automatic’s engine includes key parts such as:

  • Oil filter

  • Air filter

  • Fuel filter

  • Spark plug

  • Carburetor

  • Fuel pump

  • Ignition coil

Major transmission components consist of:

  • Drive belt

  • Hydrostatic transmission

  • Drive pulley

  • Idler pulley

  • Shift lever assembly

The 42-inch Edge mower deck includes:

  • Mower blades

  • Spindle assemblies

  • Deck belt

  • Deck wheels

  • Deck lift mechanism

  • Anti-scalp rollers

Key electrical parts include:

  • Battery

  • Starter motor

  • Alternator

  • Ignition switch

  • Headlights

  • Wiring harness

Important steering components:

  • Steering wheel

  • Steering shaft

  • Front axle

  • Front wheel bearings

  • Tie rods

  • Drag link

Major body parts include:

  • Hood

  • Fenders

  • Seat

  • Fuel tank

  • Footrest

  • Frame rails

Common attachments include:

  • Grass bagger

  • Mulch kit

  • Front bumper

  • Wheel weights

  • Rear hitch

This parts overview provides a general idea of the major component groups on the John Deere 125 automatic lawn tractor. For specific part numbers or detailed diagrams, consult the operator’s manual or contact an authorized John Deere dealer

John Deere 125 automatic Battery

The John Deere 125 automatic typically uses a 12-volt battery. The recommended battery for this model has the following specifications:

  • Cold Cranking Amps (CCA): 300

  • BCI Group Size: U1

  • Voltage: 12V

  • Approximate Dimensions: 7.76 inches (length) x 5.12 inches (width) x 6.7 inches (height)

  • Weight: Around 14 lbs

The battery used in the John Deere 125 automatic is usually a sealed lead-acid (SLA) or Absorbent Glass Mat (AGM) type. These batteries are maintenance-free, meaning there’s no need to add water or check electrolyte levels.

When replacing the battery for your John Deere 125 automatic, you have several options:

  • Original Equipment Manufacturer (OEM) battery from John Deere

  • Aftermarket batteries designed to fit the John Deere 125 specifications

  • Universal U1 batteries that meet the required specifications

While the battery is maintenance-free, proper care can extend its life:

  • Keep the battery clean and dry

  • Ensure connections are tight and free of corrosion

  • Charge the battery if the mower is not used for extended periods

  • Store the mower in a cool, dry place when not in use

When installing a new battery:

  • Ensure the mower is turned off and the key is removed

  • Disconnect the negative (black) cable first, then the positive (red) cable

  • Remove the old battery and install the new one

  • Connect the positive (red) cable first, then the negative (black) cable

  • Secure the battery in place using the provided hold-down clamp

Remember to dispose of the old battery properly at a recycling center that accepts lead-acid batteries.

John Deere 125 automatic Belt Diagram

The John Deere 125 automatic lawn tractor features two main belts:

  1. Traction Drive Belt

  2. Mower Deck Belt

The traction drive belt connects the engine pulley to the transmission pulley. It runs from the engine crankshaft pulley, around an idler pulley, and then to the transmission input pulley. This belt is responsible for transferring power from the engine to the wheels.

The mower deck belt is a 42-inch belt that powers the cutting blades. It follows this path:

  1. Engine pulley

  2. Around the right spindle pulley

  3. Around the center spindle pulley

  4. Around the left spindle pulley

  5. Around an idler pulley

  6. Back to the engine pulley

The mower deck belt is routed through a series of guide pulleys and brackets to maintain proper tension and alignment.

Both belts use spring-loaded idler pulleys to maintain proper tension. The mower deck belt also features a belt keeper near the engine pulley to prevent the belt from slipping off during operation.

  • Engine Pulley: Located on the bottom of the engine crankshaft

  • Transmission Pulley: Found on the input shaft of the transmission

  • Spindle Pulleys: Three pulleys on the mower deck, one for each blade

  • Idler Pulleys: Spring-loaded pulleys that maintain belt tension

  • Belt Guides: Metal brackets that keep the belts properly aligned

When replacing belts, always refer to the specific part numbers for your model:

  • Traction Drive Belt: GX20006

  • Mower Deck Belt: GX20072

Ensure proper routing and tension when installing new belts to maintain optimal performance and longevity of your John Deere 125 automatic lawn tractor.

John Deere 125 automatic Oil Filter

The John Deere 125 automatic uses an engine oil filter with the part number AM125424. This filter is designed specifically for John Deere equipment to ensure optimal performance and engine protection.

The oil filter for the John Deere 125 automatic boasts several important features:

  • Large inlet holes for consistent oil flow

  • Increased media paper for better filtration of harmful particles

  • Rubber seals to prevent internal leakage

  • Media securely bonded to metal end caps for added strength

  • Rubber gaskets for a tighter seal compared to plastic gaskets

This oil filter is compatible with various John Deere models, including the 125 automatic. It fits a range of lawn tractors and riding mowers in the 100, X, and LT series.

When installing the new oil filter:

  1. Apply a light coat of fresh oil to the new filter gasket

  2. Turn the filter clockwise until the gasket contacts the filter base

  3. Tighten an additional half-turn to ensure proper sealing

Regular oil and filter changes are crucial for maintaining the John Deere 125 automatic’s engine health. It’s recommended to change the oil filter:

  • Every 50 hours of operation

  • At least once per season, even if 50 hours haven’t been reached

Using the genuine John Deere AM125424 oil filter ensures:

  • Optimal engine protection

  • Consistent oil flow

  • Efficient removal of contaminants

  • Reduced risk of engine wear and damage

By using the correct oil filter and changing it regularly, you can help extend the life of your John Deere 125 automatic and maintain its performance.

John Deere 125 automatic Oil Capacity

The John Deere 125 automatic has an engine oil capacity of 1.9 quarts (1.8 liters) when changing the oil with a new filter.

For the John Deere 125 automatic, the recommended engine oils include:

  • Turf-Gard

  • Torq-Gard Supreme

  • Torq-Gard Supreme Plus 50

  • John Deere Plus-4

It is recommended to change the oil in your John Deere 125 automatic:

  • After the first 8 hours of operation

  • Every 50 hours of operation or annually, whichever comes first

  • When filling with new oil, add it slowly and check the level frequently to avoid overfilling.

  • Always consult your operator’s manual for the most accurate information specific to your model and operating conditions.

  • Using the correct oil type and maintaining proper oil levels is crucial for the longevity and performance of your John Deere 125 automatic.

John Deere 125 automatic Air Filter

The John Deere 125 automatic uses a cartridge-style air filter with a foam pre-cleaner. This air filter is designed to protect the engine from dust and debris, ensuring optimal performance and longevity.

It is recommended to replace the air filter:

  • At least once a year

  • More frequently if operating in dusty conditions

  • As part of regular annual maintenance

To maintain the air filter system:

  1. Clean the air intake screen regularly to prevent debris buildup

  2. Check the paper air filter element for dirt or damage

  3. Clean or replace the foam pre-cleaner as needed

  4. Replace the paper air filter element when dirty or damaged

If the foam pre-cleaner is dirty:

  1. Remove it carefully

  2. Wash in warm, soapy water

  3. Rinse thoroughly

  4. Squeeze out excess water

  5. Allow to air dry completely before reinstallation

When installing a new air filter:

  • Ensure the engine is off and cool

  • Clean the area around the air filter housing

  • Install the foam pre-cleaner first, if applicable

  • Insert the new paper air filter element

  • Secure the air filter cover properly

Regular air filter maintenance:

  • Improves engine performance

  • Increases fuel efficiency

  • Extends engine life

  • Prevents dirt and debris from entering the engine

By following these guidelines, you can ensure that your John Deere 125 automatic’s engine receives clean air for optimal performance and longevity.

FAQ


Common reasons include a dead battery, faulty spark plugs, clogged fuel filter, or issues with the ignition switch. Check these components and ensure proper fuel flow to the engine.


Change the oil after the first 8 hours of operation, then every 50 hours of use or annually, whichever comes first.


Use 10W30 oil for optimal performance. John Deere recommends their own branded oils like Turf-Gard or Torq-Gard Supreme.


Remove the blades, use a file or grinder to sharpen the cutting edge, and ensure they’re balanced before reinstalling. Sharpen or replace blades every 50 hours of use.


Maintain 10-12 PSI for front tires and 14-16 PSI for rear tires. Always check the operator’s manual for specific recommendations.


Use the cutting height adjustment lever located near the right fender. Move it to the desired notch, corresponding to cutting heights between 1 to 4 inches.


The John Deere 125 automatic typically comes with a 42-inch mower deck.


Replace the air filter annually or more frequently if operating in dusty conditions. Clean the foam pre-cleaner every 25 hours of operation.


The fuel tank capacity is approximately 2.4 gallons (9.1 liters).


Add fuel stabilizer, change the oil, clean the mower deck, remove the battery for indoor storage, and store the mower in a dry, protected area.


Use a Champion RC12YC spark plug or equivalent. Replace spark plugs every 100 hours of operation or annually.


Pull up on the PTO (Power Take-Off) switch located on the control panel to engage the blades.


Check the alternator, voltage regulator, and battery connections. Ensure the drive belt is not loose or damaged.


Lubricate the mower spindles every 25 hours of operation using a grease gun with high-quality grease.


The John Deere 125 automatic typically has a 20 horsepower Briggs & Stratton engine.