Tractors
X106, X126, and X166
Copyright 2018 © Deere & Company. THIS DATA IS THE PROPERTY OF DEERE & COMPANY. ALL USE AND/OR REPRODUCTION NOT SPECIFICALLY AUTHORIZED BY DEERE & COMPANY IS PROHIBITED.
All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.
Thank You for Purchasing a John Deere Product
Using Your Operator’s Manual
Machine Use
Emissions Performance and Tampering
Special Messages
Parts
Service Literature
00 - Product Identification
Record Identification Numbers
05 - Safety Labels without Text
Safety Label Location
Understanding the Machine Safety Labels without Text
Avoid Injury From Rotating Blades and Thrown Objects
Avoid Injury From Rotating Blades
Avoid Injury From Hot Surfaces
Avoid Injury From Getting Caught in Belts
Read Operator’s Manual
Keep Children Away from Mower
Avoid Injury From Thrown Objects
Avoid Injury From Rotating Blades and Thrown Objects
Avoid Injury From Equipment Fires
10 - Safety
Training
Preparation
Operation
Maintenance and Storage
Checking Mowing Area
Parking Safely
Rotating Blades are Dangerous
Protect Children
Operating on Slopes
Keep Riders Off
Towing Loads Safely
Wear Appropriate Clothing
Driving Safely on Public Roads
Practice Safe Maintenance
Avoid High Pressure Fluids
Prevent Fires
Handling Fuel Safely
Handling Waste Product and Chemicals
Tire Safety
Checking Wheel Hardware
15 - Machine Cleanout
General Cleaning Guidelines
Cleanout Areas
20 - Assembly
Charge and Connect Battery
Check Tire Pressure
Adjust Mower Deck Level
Adjust Mower Deck Gage Wheels
Check Engine Oil Level
Check Machine Safety System
Break In Electric Engagement Clutch (If Equipped)
25 - Operating Controls
Operator Station Controls (X106)
Operator Station Controls (X126)
Operator Station Controls (X166)
30 - Operating
Daily Operating Checklist
Adjusting Seat
Adjusting Cutting Height
Checking and Adjusting Mower Deck Level
Adjusting Mower Deck Wheels
Testing Safety Systems
Testing Park Brake Switch
Testing Park Brake
Testing Attachment Engagement Switch or Lever
Testing Seat Switch
Testing Reverse Implement Option (RIO)
Using the Park Brake
Using the Hourmeter and Service Reminder
Checking Fuel Level
Using Key Switch and Headlights
Starting the Engine
Idling the Engine
Stopping the Engine
Using Travel Controls on Automatic Transmission (X106)
Using Travel Controls on Hydrostatic Transmission (X126 and
X166)
Using The Reverse Implement Option (RIO)
Using Cruise Control (X166)
Engaging and Disengaging Mower
Using Mulch Cover 107 cm (42 in.) and 122 cm (48 in.) Mower
Decks (If Equipped)
Unplugging Mower, Bagger, or Material Collection System
Moving Machine by Hand
Transporting Machine on Trailer
Transporting Material Collection System (If Equipped)
Using Weights
Using Tire Chains
Using Accessories
Choosing Mower Blades
Mowing Tips
Towing Loads
35 - Service Intervals
Servicing Your Machine
Service Intervals
40 - Service Lubrication
Grease
Lubricating Front Axle
Lubricating Pivot Points
45 - Service Engine
Carbon Dioxide Emissions (CO₂)
Avoid Fumes
Engine Oil
Checking Engine Oil Level
Changing John Deere Easy Change™ 30-Second Oil Change System
(If equipped)
Changing Engine Oil and Filter on models not equipped with the
John Deere Easy Change™ 30-Second Oil Change System
Cleaning Air Intake Screen and Engine Fins
Checking and Cleaning Air Cleaner Elements (Single Cylinder)
Checking and Cleaning Air Cleaner Elements (Twin Cylinder Engine)
Checking Spark Plug
Replacing Fuel Filter
Spark Arrestor Maintenance (If Equipped)
50 - Service Transmission
Checking Transmission
55 - Service Mower
Removing and Installing Machine Shields
Removing or Installing Mower Drive Belt at Engine Drive Sheave
(122 cm (48 in.) Mower Deck)
Removing Mower Deck
Installing Mower Deck
Replacing Mower Drive Belt (107 cm (42 in.) Mower Deck)
Replacing Mower Drive Belt (122 cm [48 in.] Mower Deck)
Cleaning Mower Deck
Checking for Bent Mower Blades
Servicing Mower Blades
Sharpening Blades
Balancing Blades
60 - Service Electrical
Service the Battery Safely
Removing and Installing the Battery
Cleaning Battery and Terminals
Using Booster Battery
Replacing Headlight Bulb
Replacing Fuse
65 - Service Miscellaneous
Using Proper Fuel and Stabilizer
Filling Fuel Tank
Lifting Machine
Checking Tire Pressure
Removing and Installing Hood
Removing and Installing Closeout Panels (If Equipped)
Cleaning Plastic Surfaces
Cleaning and Repairing Metal Surfaces
Avoid Damage to Plastic and Painted Surfaces
Removing and Installing Front Wheel Assembly
Removing and Installing Rear Wheel Assembly
70 - Troubleshooting
Using Troubleshooting Chart
Engine
Electrical
Tractor
Mower
75 - Storage
Storing Safety
Preparing Machine for Storage
Preparing Fuel and Engine For Storage
Removing Machine From Storage
80 - Specifications
Automatic Model X106
Model X126
Model X166
Electrical System (All Models)
Fuel System (All Models)
Tires
Capacities
Dimensions (All Models)
Mower Deck - 107 cm
Mower Deck - 122 cm
Recommended Lubricants (All Models)
Fast Idle Engine Speed
Speed of Rotation of Cutting Device
Sound Measurements
Vibration Measurements
85 - Declaration of Conformity
EC Declaration of Conformity
EC Declaration of Conformity
EC Declaration of Conformity
JDQS - John Deere Quality Statement
John Deere Quality
SR - Service Record
Record Service Dates
SG - Slope Gauge
Slope Gauge Template