Part of the John Deere Repair Manuals.
This is the factory technical manual John Deere dealers used to service the LA100 series: LA105, LA115, LA125, LA135, LA145, LA155, LA165 and LA175 lawn tractors built from 2005 to 2010. It covers both the single-cylinder gas engines and the V-twins, with engine identification, tests and adjustments, repair specs and torque specifications. You also get electrical troubleshooting for starting problems, fuel shutoff solenoid and battery testing, plus power train coverage of the T40 and K46 hydrostatic transaxles, steering, brakes and deck attachments. The specifications section lists metric and inch fastener torque charts, gasoline requirements, oil viscosity and grease grades. If your tractor cranks but will not fire, or drives weak up a hill, the answers are in here.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 4-8 | Safety Symbols and Signal Words, Battery Safety, Fire Prevention, Protective Clothing, Chemical Handling |
| Specifications and Information | 9-15 | Metric Fastener Torque Values, Inch Fastener Torque Values, Gasoline Requirements, Engine Oil Viscosity, Alternative Lubricants |
| Engine - Gas | 16-84 | Engine Identification, General Specifications, Tests and Adjustments, Repair Specifications, Torque Specifications |
| Engine - V-Twin | 85-157 | Engine Identification, General Specifications |
| Electrical | 158-249 | Starting Problems, Fuel Shutoff Solenoid Test, Battery Testing |
| Power Train | 250-321 | Transaxle Serial Number, Hydrostatic Transmission Oil |
| Steering | 322-337 | General Maintenance |
| Brakes | 338-353 | Parking Safely |
| Attachments | 354-393 | General Safety |
| Miscellaneous | 394-402 | Manual Description, Tools and Materials, Hood Removal and Installation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Unleaded gasoline | ||
| Gasoline octane rating (anti-knock index) | 87 or higher | p. 12 |
| Gasoline ethyl or grain alcohol blend limit | 10% by volume | p. 12 |
| Gasoline methyl tertiary butyl ether (MTBE) blend limit | 15% by volume | p. 12 |
| 4-Cycle Gasoline Engine Oil | ||
| Engine oil API service classification | SG or higher | p. 13 |
| Break-In Engine Oil | ||
| Break-in engine oil API service classification | SE or higher | p. 13 |
| Break-in period | 5 hours (maximum) | p. 13 |
| General all-purpose grease | ||
| Grease NLGI grade | No.2 | p. 14 |
| All Models | ||
| Grease effective temperature range | -29 to 135 degrees C (John Deere greases) / -20 to 275 degrees F (John Deere greases) | p. 14 |
| Transmission model | T40 (Transmissions) / K46 (Transmissions) | p. 15 |
| Transmission optional fill oil | J20C Hygard Hydraulic oil (T40 or K46 transmissions) / 5W-50 Synthetic Engine Oil (T40 or K46 transmissions) | p. 15 |
| Spark Plug Gap | 0.76 mm (0.030 in.) | p. 17 |
| Spark Plug Torque | 20 N•m (180 lb-in.) | p. 17 |
| Valve Clearance - Intake | 0.08 - 0.13 mm (0.003 - 0.005 in.) | p. 17 |
| Valve Clearance - Exhaust | 0.13 - 0.18 mm (0.005 - 0.007 in.) | p. 17 |
| Magneto Air Gap | 0.25 - 0.35 mm (0.010 - 0.014 in.) | p. 17 |
| Crankcase Oil Capacity | 1.4 L (1.5 qt) | p. 16 |
| Fast Idle Speed | 3350 ± 100 rpm | p. 17 |
| Machines | ||
| Transmission type | Hydrostatic | p. 14 |
| T40 and K46 transmissions | ||
| Transmission factory fill oil | 10W30 engine oil | p. 15 |
