john deer 100 Series User Manual (English)

Questions and Answers:

D
Diane WalterAug 21, 2025
Why is my john deer 100 engine hard to start?
- R
  Rachel MeyerAug 21, 2025
  Your John Deer Tractor engine might be hard to start due to several reasons. The carburetor may need adjustment or cleaning, the choke cable might not be properly adjusted, or the fuel filter could be clogged. Other potential causes include a faulty spark plug, stale or improper fuel, loose or corroded electrical connections, or using the incorrect engine oil viscosity. Consider adjusting or cleaning the carburetor, adjusting the choke cable, cleaning or replacing the fuel filter, replacing the spark plug, using fresh, proper fuel, inspecting and securing electrical connections, and using the correct engine oil viscosity.
A
Ashley SimpsonAug 23, 2025
What to do if john deer 100 engine will not start?
- B
  benjaminrobinsonAug 23, 2025
  If your John Deer Tractor engine won't start, make sure the brake pedal is depressed and the mower is disengaged. Check that the spark plug wire is securely connected and that you're using the correct fuel type. Also, inspect the fuel filter and clean or replace it if it's plugged. Finally, check the safety switch and replace it if it's defective. If these steps don't resolve the issue, refer to the Electrical Troubleshooting Section.
J
John ReidAug 25, 2025
Why does my John Deer Tractor engine lose power?
- M
  Matthew EdwardsAug 25, 2025
  Your John Deer Tractor engine may be losing power due to several reasons: the engine might be overheating, there could be too much oil in the engine, the air cleaner might be dirty, or the spark plug could be faulty. Also, the travel speed might be too fast for the conditions, or you might be using the improper fuel. In order to solve this problem you should check the engine cooling system, check and adjust oil level, clean or replace air cleaner, replace the faulty spark plug, reduce travel speed, and use proper fuel type.
P
Paul PhillipsAug 27, 2025
What to do if John Deer Tractor engine overheats?
- J
  John StevensonAug 27, 2025
  If your John Deer Tractor engine is overheating, check the engine air intake screen and clean it if it's plugged. Also, clean the cooling fins. Ensure the engine oil level is correct, adjusting if it's too low or too high. Avoid operating the engine for extended periods at a slow idle speed.
E
erin84Aug 27, 2025
Why john deer 100 starter does not work?
- B
  brettharrisAug 27, 2025
  If the starter on your John Deer Tractor isn't working or turning the engine, the brake pedal may not be depressed, or the mower might be engaged. Ensure the brake pedal is depressed and the mower is disengaged. Corroded battery terminals or a discharged battery could also be the cause, so clean the battery terminals and charge the battery. A blown fuse can also prevent the starter from working, so replace the blown fuse. If the fusible link in the starting circuit is blown, consult your authorized dealer.
J
Jennifer MoraAug 29, 2025
Why does my john deer 100 engine backfires?
- P
  pstoneAug 29, 2025
  Your John Deer Tractor engine might backfire due to a faulty spark plug, so replace it. Also, ensure the operator is seated, as raising off the seat can cause backfiring.
G
Gary SmithAug 30, 2025
What causes poor engine performance in john deer 100?
- J
  jnobleAug 30, 2025
  Poor engine performance in your John Deer Tractor can be caused by dirt in the fuel system or old fuel. Replace the fuel with fresh stabilized fuel. It is also recommended to obtain fuel from another supplier before suspecting machine problems. Suppliers blend fuels differently, and changing suppliers will generally solve any performance problems. Fuel blended with alcohol or ether may contribute to performance problems by causing gum and varnish deposits, especially if fuel is stored for several weeks or more. Obtain fresh fuel.
B
Beth RobinsonSep 1, 2025
Why john deer 100 Tractor vibrates too much?
- U
  ubarrettSep 1, 2025
  Excessive vibration or rattling in your John Deer Tractor can be attributed to several factors. The attachment drive belts may be worn or damaged, or the traction drive belt could be damaged or worn. Dirt on the drive sheaves or blades that are bent or out of balance can also cause these issues. Consider replacing the worn or damaged attachment drive belts, replacing the damaged or worn traction drive belt, cleaning the drive sheaves, and repairing or balancing the blades.
M
masseymelissaSep 2, 2025
Why does my John Deer Tractor engine run unevenly?
- D
  dana97Sep 2, 2025
  An uneven running engine in your John Deer Tractor can be caused by several factors. The cooling fins could be plugged, electrical connections might be loose, or the choke or throttle cable could be sticking. Additionally, the fuel line or fuel filter might be plugged, the fuel could be stale or dirty, or the improper fuel type could be in use. A plugged air cleaner element can also cause this issue. Try cleaning the cooling fins, tightening electrical connections, inspecting and freeing sticking cables, clearing the plugged fuel line or filter, replacing with fresh fuel, using the proper fuel type, and cleaning or replacing the air cleaner element.
E
Eric EdwardsSep 4, 2025
Why John Deer Tractor battery will not charge?
- G
  Gary SchultzSep 4, 2025
  If your John Deer Tractor battery won't charge, it could be due to a dead cell in the battery, in which case you should replace the battery. Dirty battery cables and terminals can also prevent charging, so clean them. Low engine speed or excessive idling can also affect battery charging, so increase the engine speed.

john deer 100 Series Specifications

General

Brand	john deer
Model	100 Series
Category	Tractor
Language	English

Summary

Introduction

Thank You for Purchasing a John Deere Product

Expresses gratitude to the customer for buying a John Deere product.

Using Your Operator's Manual

Guidance on how to read and utilize the operator's manual effectively.

Special Messages

Highlights important messages regarding safety, machine damage, and operation.

Product Identification

Record Identification Numbers

Instructions for recording machine and engine identification numbers.

Register Your Product and Warranty Online

Information on how to register the product and warranty online.

Safety Labels

Locates and identifies safety labels on the machine.

Safety Labels

Understanding The Machine Safety Labels

Explains the meaning and importance of DANGER, WARNING, and CAUTION safety labels.

Safety Labels

Emission Control System Certification Label

Details the engine's certification with EPA and/or CARB emission standards.

Emission Compliance Period

Indicates the operating hours for which the engine is certified.

Safety

Operating Safely

Provides critical instructions for safe operation of the cutting machine.

Checking Mowing Area

Guidelines for inspecting the mowing area for potential hazards.

Parking Safely

Step-by-step instructions for safely parking the machine.

Safety

Avoid Tipping

Precautions and advice to prevent the machine from tipping, especially on slopes.

Safety

Practice Safe Maintenance

Essential safety procedures to follow before, during, and after maintenance.

Prevent Fires

Instructions to avoid machine fires and structure fires.

Assembly

Handling Fuel Safely

Critical safety precautions when handling flammable fuel.

Charge and Connect Battery

Step-by-step guide for safely charging and connecting the battery.

Assembly

Adjust Mower Deck Level

Procedures for ensuring the mower deck is properly leveled for optimal cutting.

Check Engine Oil Level

Instructions on how to check the engine oil level before operation.

Check Machine Safety System

Tests to verify the functionality of the machine's safety interlock circuit.

Operating Controls

Operator Station Controls (LA105)

Identification and description of controls on the LA105 operator station.

Operating Controls

Operator Station Controls (LA115, LA125, LA135)

Identification and description of controls on LA115, LA125, LA135 operator stations.

Operating Controls

Operator Station Controls (LA145, LA155, LA165, LA175)

Identification and description of controls on LA145, LA155, LA165, LA175 stations.

Operating

Daily Operating Checklist

A list of essential checks to perform before each machine operation.

Adjusting Seat

Instructions for adjusting the operator's seat for comfort and proper positioning.

Adjusting Cutting Height

Steps for adjusting the mower deck cutting height to desired levels.

Checking Mower Deck Level

Procedure for checking and ensuring the mower deck is level.

Operating

Adjusting Mower Deck Level

Detailed steps for adjusting the mower deck level for optimal performance.

Operating

Adjusting Mower Deck Wheels

Guidance on adjusting mower deck wheels for proper ground clearance.

Testing Safety Systems

Procedures to verify the correct operation of all installed safety systems.

Testing Park Brake

Tests to ensure the park brake is functioning correctly.

Operating

Testing Attachment Engagement Switch or Lever

Tests to verify the attachment engagement system functions properly.

Testing Seat Switch

Tests to confirm the seat switch correctly stops the engine.

Testing Reverse Implement Option (RIO)

Tests to ensure the Reverse Implement Option (RIO) functions as intended.

Operating

Starting the Engine

Detailed instructions for safely starting the engine under various conditions.

Idling the Engine

Guidance on proper engine idling to prevent damage and ensure performance.

Operating

Using Travel Controls on Gear Transmission

Instructions for using travel controls on gear transmission models.

Using Travel Controls on Automatic Transmission

Instructions for using travel controls on automatic transmission models.

Using The Reverse Implement Option (RIO)

Guidance on using the Reverse Implement Option (RIO) for repositioning.

Operating

Engaging and Disengaging Mower

Steps for engaging and disengaging the mower deck.

Using Cruise Control (LA125, LA135, LA145, LA155, LA165, LA175)

Instructions for engaging and disengaging the cruise control feature.

Operating

Checking For Plugging While Driving

Troubleshooting steps for mower deck plugging issues during operation.

Removing Debris From Inspection Points

Procedure for safely removing debris from mower inspection points.

Moving Machine by Hand

Instructions on how to safely move the machine manually.

Operating

Using Weights

Guidance on using weights for stability when operating on slopes or with attachments.

Using Accessories

Information on using various approved accessories with the machine.

Service Intervals

Choosing Mower Blades

Guidance on selecting the appropriate mower blades for different tasks.

Mowing Tips

Recommendations for achieving best lawn cut quality and appearance.

Servicing Your Machine

Overview of service intervals and maintenance requirements for the machine.

Service Lubrication

Lubricating Front Axle

Instructions for lubricating the front axle pivot and wheel spindles.

Lubricating Pivot Points

Guide for lubricating various pivot points on the mower deck.

Service Engine

Engine Oil

Information on engine oil type and viscosity based on temperature.

Checking Engine Oil Level

Procedure for checking the engine oil level before operation.

Service Engine

Changing Engine Oil and Filter

Step-by-step instructions for changing the engine oil and filter.

Cleaning Air Intake Screen and Engine Fins

Procedure for cleaning air intake screens and engine cooling fins.

Service Engine

Checking and Cleaning Air Cleaner Elements (LA105 and LA115)

Steps for checking and cleaning air cleaner elements on LA105 and LA115 models.

Checking and Cleaning Air Cleaner Elements (LA135 and LA145)

Steps for checking and cleaning air cleaner elements on LA135 and LA145 models.

Service Engine

Checking and Cleaning Air Cleaner Elements (LA125)

Steps for checking and cleaning air cleaner elements on LA125 models.

Checking and Cleaning Air Cleaner Elements (LA155, LA165 and LA175)

Steps for checking and cleaning air cleaner elements on LA155-LA175 models.

Service Engine

Checking Spark Plug

Procedure for checking, cleaning, and inspecting the spark plug.

Service Transmission

Checking Transmission

Information regarding the sealed transmission and maintenance requirements.

Service Mower

Overview of mower servicing procedures.

Removing or Installing Mower Drive Belt at Engine Drive Sheave (122 cm (48 in.) and 137 cm (54 in.) Mower Deck)

Steps for removing and installing the mower drive belt on specific deck sizes.

Service Mower

Removing Mower Deck

Detailed steps for safely removing the mower deck from the machine.

Installing Mower Deck

Detailed steps for safely installing the mower deck onto the machine.

Service Mower

Replacing Mower Drive Belt (122 cm (48 in.) and 137 cm (54 in.) Mower Decks)

Procedure for replacing the mower drive belt on 122/137 cm decks.

Replacing Mower Drive Belt (107 cm (42 in.) Mower Deck)

Procedure for replacing the mower drive belt on 107 cm decks.

Adjusting Mower Belt Tension (107 cm (42 in.) Mower Deck)

How to adjust the mower belt tension on 107 cm decks.

Service Mower

Adjusting Spindle Brakes (107 cm (42 in.) Mower Deck)

Instructions for adjusting spindle brakes on 107 cm mower decks.

Checking for Bent Mower Blades

Procedure to check mower blades for damage or bending.

Service Electrical

Servicing Mower Blades

General information and safety precautions for servicing mower blades.

Removing Mower Blades

Steps for safely removing mower blades from the deck.

Installing Mower Blades

Steps for safely installing mower blades onto the spindle.

Service Electrical

Service the Battery Safely

Crucial safety measures when servicing the battery.

Removing and Installing the Battery

Step-by-step instructions for removing and installing the battery.

Using Booster Battery

Procedure for safely jump-starting the machine using a booster battery.

Service Miscellaneous

Using Proper Fuel

Guidelines for selecting and using the correct type of fuel.

Filling Fuel Tank

Instructions and safety precautions for filling the fuel tank.

Service Miscellaneous

Cleaning Plastic Surfaces

Proper methods for cleaning and maintaining plastic surfaces.

Front Wheel Assembly, Removing and Installing

Steps for removing and installing the front wheel assembly.

Service Miscellaneous

Removing and Installing Rear Wheel Assembly

Steps for removing and installing the rear wheel assembly.

Troubleshooting

Using Troubleshooting Chart

Guidance on how to use the troubleshooting chart to diagnose issues.

Troubleshooting

Engine Issues

Common engine problems and their potential causes and checks.

Electrical Issues

Common electrical problems and their potential causes and checks.

Storage

Storing Safety

Safety precautions to take when storing the machine.

Preparing Machine for Storage

Steps to prepare the machine for storage to prevent damage.

Preparing Fuel and Engine For Storage

Instructions for preparing the fuel system and engine for long-term storage.

Specifications

Engine Specifications

Technical data and specifications for the machine's engine.

Automatic Model LA115 Specifications

Technical specifications specific to the LA115 automatic model.

Specifications

Automatic Model LA125 Specifications

Technical specifications specific to the LA125 automatic model.

Automatic Models LA135 and LA145 Specifications

Technical specifications specific to LA135 and LA145 automatic models.

Capacities

Lists the various fluid capacities of the machine.

Specifications

Recommended Lubricants (All Models)

Lists recommended lubricants for the machine's various components.

Dimensions

Provides the overall physical dimensions of the machine.

Warranty

Product Warranty

Details the terms and conditions of the product warranty.

Owner's Warranty Responsibilities

Outlines the owner's responsibilities for maintaining warranty coverage.

Emissions Warranty Interpretation

Clarifies how the emissions warranty terms are interpreted.

Getting Quality Service

Service Literature

Information on how to obtain service literature for the machine.

Parts

Information regarding John Deere parts and how to order them.

Getting Quality Service

John Deere Quality Continues with Quality Service

Highlights John Deere's commitment to quality service and support.

Service Record

Related product manuals

john deer 100 Series User Manual

Table of Contents

Questions and Answers:

john deer 100 Series Specifications

Summary

Introduction

Thank You for Purchasing a John Deere Product

Using Your Operator's Manual

Special Messages

Product Identification

Record Identification Numbers

Register Your Product and Warranty Online

Safety Labels

Safety Labels

Understanding The Machine Safety Labels

Safety Labels

Emission Control System Certification Label

Emission Compliance Period

Safety

Operating Safely

Checking Mowing Area

Parking Safely

Safety

Avoid Tipping

Safety

Practice Safe Maintenance

Prevent Fires

Assembly

Handling Fuel Safely

Charge and Connect Battery

Assembly

Adjust Mower Deck Level

Check Engine Oil Level

Check Machine Safety System

Operating Controls

Operator Station Controls (LA105)

Operating Controls

Operator Station Controls (LA115, LA125, LA135)

Operating Controls

Operator Station Controls (LA145, LA155, LA165, LA175)

Operating

Daily Operating Checklist

Adjusting Seat

Adjusting Cutting Height

Checking Mower Deck Level

Operating

Adjusting Mower Deck Level

Operating

Adjusting Mower Deck Wheels

Testing Safety Systems

Testing Park Brake

Operating

Testing Attachment Engagement Switch or Lever

Testing Seat Switch

Testing Reverse Implement Option (RIO)

Operating

Starting the Engine

Idling the Engine

Operating

Using Travel Controls on Gear Transmission

Using Travel Controls on Automatic Transmission

Using The Reverse Implement Option (RIO)

Operating

Engaging and Disengaging Mower

Using Cruise Control (LA125, LA135, LA145, LA155, LA165, LA175)

Operating

Checking For Plugging While Driving

Removing Debris From Inspection Points

Moving Machine by Hand

Operating

Using Weights

Using Accessories

Service Intervals

Choosing Mower Blades

Mowing Tips

Servicing Your Machine

Service Lubrication

Lubricating Front Axle

Lubricating Pivot Points

Service Engine