John Deere 120 : Parts, Manuals, Diagrams, Specs

John Deere 120

The John Deere 120 is a compact utility tractor that was produced by the renowned agricultural machinery manufacturer John Deere. This model was part of the company’s 100 series, which was designed to cater to the needs of small-scale farmers, homeowners with large properties, and landscaping professionals.

The 120 tractor was introduced in the early 2000s and quickly gained popularity due to its versatility and reliability. It featured a robust diesel engine that provided ample power for various tasks, including mowing, tilling, and light hauling. The engine’s horsepower typically ranged between 20 and 25, making it suitable for a wide array of applications without being overpowering or difficult to handle.

One of the key advantages of the John Deere 120 was its compact size, which allowed for easy maneuverability in tight spaces and storage in smaller sheds or garages. Despite its smaller dimensions, the tractor maintained excellent stability and traction, thanks to its well-designed chassis and tire configuration.

The 120 model came equipped with a hydrostatic transmission, offering smooth and effortless operation. This feature allowed operators to change direction and speed without the need for clutching or shifting gears, enhancing productivity and reducing operator fatigue during extended use.

The tractor’s versatility was further enhanced by its compatibility with a wide range of attachments and implements. Users could easily attach mowers, front-end loaders, backhoes, and other tools to tackle various tasks around their property or job site.

Comfort was also a priority in the design of the John Deere 120. The operator station featured an ergonomic seat, easily accessible controls, and good visibility, ensuring a comfortable working experience even during long hours of operation.

Overall, the John Deere 120 represented a well-balanced combination of power, versatility, and ease of use, making it a popular choice among those seeking a reliable compact tractor for diverse applications.

John Deere 120 Specs

Engine and Power

The John Deere 120 is available in various configurations, including tractors and excavators. For tractors, the engine power typically ranges from 20 to 22 hp (14.9 to 16.4 kW) for lawn models, while larger agricultural models can reach up to 120 hp (89.5 kW). The engines are usually V-twin designs with displacements ranging from 655 cc to 4.5 L, depending on the specific model and application.

Transmission

Transmission options vary by model. Lawn tractors often feature hydrostatic transmissions with side-by-side pedals for easy operation. Larger agricultural models may offer more complex transmissions, such as 24 forward and 8 reverse gears in synchronized or power reverser configurations.

Fuel System

Fuel tank capacity ranges from 2.4 gallons (9.1 L) in smaller lawn tractors to 66 gallons (250 L) in larger models. The fuel delivery system typically includes a pulse pump and carburetor for gasoline engines, while diesel models may feature high-pressure common rail systems.

Hydraulics

The hydraulic system capacity varies widely depending on the model, from around 20 gallons (76 L) in compact models to 35 gallons (134 L) in larger excavators. Lifting capacities can range from a few hundred pounds for lawn tractors to several thousand pounds for agricultural models.

Dimensions and Weight

Dimensions vary significantly across the range. Lawn tractors may have a wheelbase of around 48.9 inches (124.2 cm) and an overall length of 69.7 inches (177 cm). Larger models will have substantially greater dimensions. Weights can range from about 444 lbs (201 kg) for a lawn tractor to several tons for excavators and large agricultural tractors.

Features

Many John Deere 120 models come equipped with features such as power steering, adjustable seats, and easy-to-read instrument panels. Some lawn tractor models include the Easy Change 30-second oil change system for simplified maintenance. Agricultural models may offer advanced features like precision farming technology and comfortable cabs with air conditioning.

John Deere 120 Prices

John Deere 120R Compact Tractor Loader

The John Deere 120R Compact Tractor Loader is priced at approximately £6,510 (including VAT). It is compatible with models such as the 1023E, 1025R, and 2025R tractors. This loader offers a lift capacity of up to 553 lbs (251 kg), with an optional Mechanical Self-Leveling (MSL) feature that increases the lift capacity to 726 lbs (330 kg).

John Deere S120 Lawn Tractor

The John Deere S120 Lawn Tractor is designed for residential use and features a 22-horsepower engine. Prices for this model vary depending on location and dealer but typically range from $2,500 to $3,000 for new units. Used models may be available at lower prices depending on condition and hours of use.

John Deere 120D Excavator

The John Deere 120D Excavator, a tracked construction machine, does not have a fixed price listed but is often sold on request. Prices for used models depend on factors like year of manufacture, hours of operation, and condition. Comparable excavators from John Deere can range from €50,000 to €90,000.

Used John Deere 120 Models

Used John Deere 120 equipment, including tractors and loaders, can be found in various price ranges. For example, a used John Deere 120R loader may be priced at £4,195. Prices for used units depend heavily on their age, condition, and included attachments or features.

Factors Affecting Pricing

Pricing for John Deere 120 models varies based on factors such as the specific model type (tractor, loader, or excavator), new versus used condition, included features or attachments, and regional market demand. Buyers should consult local dealers for the most accurate pricing information.

John Deere 120 Finance Options

John Deere Financial Options

John Deere offers flexible financing plans tailored to meet the needs of customers purchasing tractors, loaders, and other equipment. These options include installment loans, leasing arrangements, and revolving credit accounts. Financing terms can range from short-term agreements to extended plans of up to 84 months, often with competitive interest rates or promotional offers such as 0% APR for specific periods.

Dealer Financing

Many John Deere dealers collaborate with financial institutions to provide financing directly at the point of sale. Customers can secure loans or leases through these partnerships, simplifying the purchasing process. Dealer financing often includes promotional rates and flexible repayment schedules.

Multi-Use Account

For customers requiring ongoing financing for multiple purchases, John Deere’s Multi-Use Account provides a revolving credit line. This account can be used for equipment, parts, services, and even seasonal agricultural needs. It offers convenience and flexibility for farmers and contractors managing diverse expenses.

Leasing Options

Leasing is available for customers who prefer lower monthly payments and the ability to upgrade equipment periodically. John Deere leases typically include maintenance packages, reducing overall costs and ensuring equipment reliability.

Promotional Offers

John Deere frequently runs special promotions, such as 0% financing for up to 84 months on select models or discounted monthly payment plans. These offers are designed to make high-quality equipment more accessible to buyers.

Third-Party Financing

Customers can also explore financing options through third-party providers like CNH Industrial Capital or Vision Bank. These institutions offer tailored solutions based on credit scores, cash flow, or specific business needs.

Application Process

Financing applications can be completed online or at dealerships. John Deere Financial provides tools like calculators to estimate payments and determine the best plan for individual budgets. Approval times are typically quick, ensuring a smooth purchasing experience.

John Deere 120 Parts

Engine Parts

The John Deere 120 series tractors use various engine components that may need replacement over time. Key engine parts include:

• Spark plugs

• Air filters (both cartridge and pre-cleaner)

• Oil filters

• Fuel filters

• Engine oil (typically 10W30 grade)

Mower Deck Components

For the mower deck, essential parts include:

• Mower blades (available in different types such as high lift, mulching, and side discharge)

• Mower deck belt

• Gage wheels

• Mower deck leveling gauge

Electrical System

Important electrical components for the John Deere 120 include:

• Battery (12V)

• Headlight bulbs

• Ignition switch

• Plunger switch

• Reverse implement push switch

Fuel System

Key fuel system parts comprise:

• Fuel tank filler cap

• In-line fuel filter

Transmission and Drive

For the transmission and drive system, notable parts are:

• Traction drive belt

• Control lever throttle cable

Miscellaneous Parts

Other important parts and accessories for the John Deere 120 include:

• Grease gun

• Multi-purpose grease

• Home maintenance kit

• Muffler

Replacement Guidelines

Many parts have specific replacement intervals:

• Engine oil and filter: Change every 8/50/100/150/200/250 hours

• Air filter: Change every 50/100/150/200/250 hours

• Fuel filter: Change every 50/100/150/200/250 hours

• Spark plug: Change every 50/100/150/200/250 hours

When replacing parts, it’s crucial to use genuine John Deere components or high-quality aftermarket alternatives to ensure proper fit and function. Always consult your operator’s manual for specific part numbers and maintenance schedules tailored to your exact model.

John Deere 120 Loader

The John Deere 120 lawn tractor is equipped with a 12-horsepower Kohler single-cylinder gasoline engine. This compact and reliable engine is designed for residential use, making it suitable for mowing and light yard work.

John Deere S120 Lawn Tractor

The John Deere S120 lawn tractor features a more powerful 22-horsepower V-twin engine. It is designed for residential applications, offering enhanced performance for mowing, hauling, and other yard tasks.

John Deere 6120B Tractor

The John Deere 6120B agricultural tractor is powered by a 120-horsepower turbocharged diesel engine. This model is intended for medium-scale farming operations, providing ample power for plowing, tilling, and other fieldwork.

John Deere 6120R Tractor

The John Deere 6120R utility tractor also delivers 120 horsepower from its advanced diesel engine. It is designed for versatility in agricultural and industrial applications, with additional features like Intelligent Power Management (IPM) that can increase horsepower when needed.

John Deere 6120M Tractor

The John Deere 6120M tractor offers a gross engine power of 120 horsepower. It is built for heavy-duty tasks in farming or construction, with advanced transmission options and high fuel efficiency.

John Deere 120 Oil Filter

The John Deere 120 uses an oil filter designed to maintain engine performance and extend engine life by effectively removing contaminants from the oil. Below are the key specifications and options for the oil filter:

Part Numbers

• Common replacement part numbers include AM125424, GY20577, and LG492932S.

• For models with the Easy Change system, the filter part number may differ, such as AUC14214.

Specifications

• Thread size: 3/4-16

• Outer diameter (OD): Approximately 2.9 inches

• Height: Approximately 2.3 inches

Compatibility
This oil filter fits a variety of John Deere models, including the 120 series lawn tractors and other compatible equipment with similar engine configurations.

Maintenance Recommendations

• Replace the oil filter every 50 hours of operation or as specified in the maintenance schedule for your model.

• Always use a high-quality or genuine John Deere oil filter to ensure optimal performance and longevity of your engine.

Installation Tips

1. Ensure the engine is cool before replacing the filter.

2. Remove the old filter by turning it counterclockwise.

3. Apply a thin layer of clean oil to the gasket of the new filter.

4. Screw in the new filter by hand until snug, then tighten an additional quarter turn.

Proper maintenance of your John Deere 120, including timely oil filter changes, will help keep your equipment running smoothly and efficiently over its lifespan.

John Deere 120 Belt Diagram

The John Deere 120 lawn tractor uses a belt system to transfer power from the engine to the mower deck. Here’s a general description of the belt routing:

Main Drive Belt

The main drive belt starts at the engine pulley and follows this path:

1. Wraps around the engine pulley

2. Extends to the transmission pulley

3. Loops around the transmission pulley

4. Returns to the engine area

Mower Deck Belt

The mower deck belt routing is as follows:

1. Begins at the PTO (Power Take-Off) pulley under the engine

2. Extends to the mower deck

3. Wraps around the right spindle pulley

4. Continues across the back of the deck

5. Loops around the left spindle pulley

6. Passes over the idler pulley (tensioner)

7. Returns to the PTO pulley

Key Components

• Engine Pulley: Located on the engine crankshaft

• PTO Pulley: Situated under the engine, engages when mower is activated

• Spindle Pulleys: Two pulleys on the mower deck that drive the cutting blades

• Idler Pulley: Maintains proper belt tension

• Guide Pulleys: Direct the belt path and prevent slippage

Belt Tension

Proper belt tension is crucial for optimal performance. The idler pulley, typically spring-loaded, maintains the correct tension on the mower deck belt. When the PTO is engaged, this pulley tightens the belt, allowing power transfer to the mower blades.

Remember to consult your specific John Deere 120 model’s operator manual for the exact belt routing diagram, as there may be slight variations between different production years or sub-models.

John Deere 120 Parts Diagram

The John Deere 120 lawn tractor consists of several main component groups. Here’s a general outline of the key parts and their locations:

Engine Components

• Air cleaner (located on top of the engine)

• Spark plug (on the side of the engine)

• Oil filter (beneath the engine)

• Fuel filter (inline near the fuel tank)

• Muffler (rear of the engine)

Electrical System

• Battery (under the seat)

• Headlight bulbs (front of the tractor)

• Ignition switch (on the dashboard)

Drivetrain

• Traction drive belt (connects engine to transmission)

• Transmission (beneath the tractor body)

Mower Deck

• Mower blades (underneath the deck)

• Mower deck belt (routes around pulleys under the deck)

• Gage wheels (on the sides of the deck)

Operator Area

• Seat (top of the tractor)

• Steering wheel (in front of the seat)

• Control levers (near the steering column)

Fuel System

• Fuel tank (typically at the rear)

• Fuel cap (on top of the fuel tank)

Frame and Body

• Hood (covers the engine compartment)

• Front axle (supports the front wheels)

• Rear axle (supports the rear wheels)

Remember that specific part locations and designs may vary slightly depending on the exact model year of the John Deere 120 lawn tractor.

John Deere 120 Air Filter

The John Deere 120 series lawn tractors typically use a 42-inch mower deck with three blades. These blades are crucial for maintaining a well-manicured lawn and require regular maintenance for optimal performance.

Blade Specifications

• Length: 42 inches

• Part number: GX22151 (for standard 3-in-1 blades)

• Material: High-quality steel for durability and sharpness

Maintenance Tips

1. Regular Inspection: Check blades for wear, damage, or bending every 25 hours of operation.

2. Sharpening: Sharpen blades at least once per season or when performance decreases.

3. Balancing: After sharpening, ensure blades are properly balanced to prevent vibration.

4. Replacement: Replace blades when they become too worn or damaged to sharpen effectively.

Installation Guidelines

1. Ensure the mower deck is raised and the parking brake is engaged.

2. Remove the blade bolt and washer.

3. Install the new blade with the cutting edge facing the direction of rotation.

4. Reinstall the washer and bolt, tightening to the specified torque.

Safety Precautions

• Always disconnect the spark plug wire before working on blades.

• Wear heavy gloves when handling blades to prevent cuts.

• Never operate the mower with damaged or unbalanced blades.

Performance Considerations

• Sharp blades provide a cleaner cut and healthier lawn.

• Properly maintained blades improve fuel efficiency and reduce strain on the engine.

• Regular cleaning of the mower deck helps maintain optimal blade performance.

By following these guidelines, you can ensure your John Deere 120 mower blades remain in top condition, providing excellent cutting performance throughout the mowing season.

FAQ

What is the horsepower of the John Deere 120?
The John Deere 120 lawn tractor is equipped with a 22 hp (16.4 kW) V-twin engine.

What is the cutting width of the John Deere 120 mower deck?
The John Deere 120 comes with a 42-inch Edge mower deck.

What type of transmission does the John Deere 120 have?
It features a hydrostatic transmission with side-by-side pedals for easy operation.

How often should I change the oil in my John Deere 120?
The oil should be changed every 50 hours of operation or annually, whichever comes first.

What is the Easy Change 30-Second Oil Change System?
This system allows you to change the engine oil quickly and cleanly by simply twisting on a new oil-filled filter without draining the old oil.

What size are the tires on a John Deere 120?
The front tires are 15×6-6, and the rear tires are 20×8-8.

What is the fuel tank capacity of the John Deere 120?
The fuel tank capacity is 2.4 U.S. gallons (9.1 L).

Does the John Deere 120 have a cruise control feature?
Yes, cruise control comes standard on the John Deere 120.

What is the maximum towing capacity of the John Deere 120?
The maximum towing capacity is 500 lbs (227 kg).

How many cutting height positions does the John Deere 120 mower deck have?
The mower deck has 13 cutting height positions ranging from 1 to 4 inches (2.5 to 10.2 cm).

What type of battery does the John Deere 120 use?
It uses a 12V battery with 300 Cold Cranking Amps (CCA).

Is there a mulching option available for the John Deere 120?
Yes, a mulching cover or high-performance plug is available as an accessory.

What is the warranty period for the John Deere 120?
It comes with a 2-year or 120-hour bumper-to-bumper warranty, whichever comes first.

How often should I sharpen or replace the mower blades?
Mower blades should be sharpened or replaced yearly or every 50 hours of operation, whichever comes first.

Can I attach a snow blower to my John Deere 120?
Yes, a two-stage, 44-inch (111.8 cm) snow blower is available as an attachment for the John Deere 120.