Part of the John Deere Repair Manuals.
This 358-page John Deere 100 Series Technical Manual (OEM #TM2328) puts the full service story for the 102, 105, 115, 125, and 135 tractors in your hands, covering both the single-cylinder and V-Twin B&S engines plus gear and hydrostatic power trains. Open it up and you get complete wiring schematics and harness routing for the electrical system, hydrostatic transaxle diagnostics for the T40, K46, and K62V units, and a deep troubleshooting section for mower deck and drive belt issues. The numbers are pulled straight from the factory floor: torque the spark plug to 20 N-m and set the gap at 0.76 mm before you close the deck back up. No more flipping between three forum threads trying to guess a torque value that turns out wrong. It's bookmarked by system, so you jump straight to steering, brakes, or attachments without hunting, and every page reads clean on a phone, tablet, or laptop right at your John Deere.
What's Inside This John Deere 102 to 190C (100 Series) Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-4 | Safety, Specifications and Information, Engine (B&S - Single Cylinder), Engine (B&S - V-Twin), Electrical, Power Train (Gear) |
| Safety | 5-10 | Recognize Safety Information, Handle Fluids Safely - Avoid Fires, Use Care in Handling and Servicing Batteries, Wear Protective Clothing, Parking Safely, Service Machines Safely |
| Specifications & Information | 11-18 | Fastener Torques, General Information, Serial Number Locations |
| Engine Single - B&S | 19-60 | Specifications, Diagnostics, Tests and Adjustments, Fuel and Air Repair, Engine Repair, Starting Motor Removal and Installation |
| Engine V-Twin - B&S | 61-114 | Specifications, Diagnostics, Test and Adjustments, Repair, Crankshaft and Camshaft Removal, Inspection and Installation, Starting Motor Removal and Installation |
| Electrical | 115-192 | General Information, Specifications, Component Location, Schematics and Harnesses, Diagnostics and Operation, Tests and Adjustments |
| Power Train - Gear | 193-224 | Specifications, Component Location, Theory of Operation, Diagnostics, Troubleshooting, Tests and Adjustments, Repair |
| Power Train - Hydrostatic | 225-282 | Specifications, Components - T40 & K46, Components - K62V, Theory of Operation, Diagnostics, Tests and Adjustments, Repair - All Transaxles |
| Steering | 283-294 | General Specifications, Torque Specifications, Steering System Components, Toe-In Adjustment, Steering Shaft and Pedestal Removal and Installation |
| Brakes | 295-310 | General Specifications, Torque Specifications, Brake System - Gear Transaxle, Brake System - Hydro Transaxle, Brake Adjustment - Gear, Brake Adjustment - Hydro |
| Attachments | 311-342 | Repair Specifications, Deck Lift Assembly, 42-Inch Mower Deck, Mower Decks Troubleshooting, Mower Blade Removal and Installation, Primary Drive Belt Removal and Installation |
| Miscellaneous | 343-350 | Repair Specifications, Tire Pressure Adjustment, Front Wheel Removal and Installation, Rear Wheel Removal and Installation, Hood Removal and Installation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Spark Plug Gap | 0.76 mm (0.030 in.) | p. 21 |
| Spark Plug Torque | 20 N•m (180 lb-in.) | p. 17 |
| Air Cleaner | Paper with outer foam element | p. 21 |
| Spark Test | 102/115/125/135/145 | p. 186 |
| Sector Gear | 283 | p. 287 |
| Spindle Sheave Nut | 108 N•m (80 lb-ft) | p. 313 |
| Blade Nut (42-Inch & 48-Inch Decks) | 68 N•m (50 lb-ft) | p. 334 |
| Metric Fastener Torque (Class 4.8, Lubricated, M6) | 4.8 N•m (3.5 lb-ft) | p. 13 |
| Inch Fastener Torque (Grade 1, Lubricated, 1/4) | 3.7 N•m (2.8 lb-ft) | p. 14 |
| Battery Voltage | 12 VDC | p. 186 |
| Engine Single - B&S | ||
| Engine Oil Capacity (Single Cylinder, With Filter) | 1.4 L (1.5 qt) | p. 21 |
| Engine V-Twin - B&S | ||
| Engine Oil Capacity (V-Twin, With Filter) | 1.9 L (2.0 qt) | p. 63 |
John Deere 102 to 190C (100 Series) Common Problems This Manual Covers
John Deere 100 Series engine won't turn over and hour meter shows no power
Test the electrical system and verify battery voltage measures 12 VDC as shown on page 186. Clean the battery cable terminals to remove corrosion. Tighten the connections firmly, and inspect the seat safety interlock switch if the hour meter remains completely blank.
Manual Section: Electrical Diagnostics and Operation p. 186Steering wheel feels excessively loose or fails to respond during tight turns
Inspect the steering assembly and sector gear for damaged teeth. Verify the steering linkages are secure. Torque the front axle pivot to 122 N•m (90 lb-ft) as specified on page 285. Replace the pinion gear if excessive play persists after tightening all hardware.
Manual Section: Steering Tests and Adjustments p. 285Single cylinder engine cranks but will not start or runs rough under load
Remove the spark plug and inspect the electrode for heavy carbon buildup or fouling. Adjust the spark plug gap to exactly 0.76 mm (0.030 in.) following the technical specifications on page 21. Reinstall the plug and torque it to 20 N•m (180 lb-in.).
Manual Section: Engine Single - B&S p. 21Mower deck cuts unevenly or vibrates excessively when the blades are engaged
Inspect the spindle assembly and blades for damage or severe imbalance. Replace any bent mower blades immediately. Secure the new hardware by torquing the blade nut for 42-inch and 48-inch decks to 68 N•m (50 lb-ft) as detailed on page 313.
Manual Section: Attachments Diagnostics p. 313Frequently Asked Questions
What are the recommended service intervals?
The manual specifies spindle lubrication at 25-hour intervals for both 42-inch and 54-inch mower decks. This ensures proper functioning and longevity of the spindles. p. 313
What fluids and capacities does this machine require?
The crankcase oil capacity for the single-cylinder engine is 1.4 L (1.5 qt), while the V-Twin engine requires 1.9 L (2.0 qt) with a filter or 1.8 L (1.9 qt) without. The gear transaxle has a multipurpose grease capacity of 638 g (1.396 lbs), and the K62V hydrostatic transaxle requires approximately 2.5 L (2.7 qt) of oil. p. 21
What do I get after purchasing this John Deere 102, 105, 115, 125, 135, 145?
A 358-page Technical Manual in searchable PDF format (47 MB), available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this John Deere 102, 105, 115, 125, 135, 145, 155C, 190C, John Deere?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are electrical wiring diagrams included in this John Deere 102, 105, 115, 125?
Yes, an electrical wiring diagram is included to help trace the main circuits.
