1998-2000 John Deere LT133 / LT155 / LT166 Lawn Tractors Technical Manual

Technical reference covering LT133, LT155, and LT166 Lawn Tractors: Engine, electrical, and component systems. Includes diagnostic procedures and repair specifications. JDS-G200

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Document Details

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Document Number / Seller:
28738 / Amanda Cook
File Size:
23.92 MB
File Type:
PDF
Language:
English
Pages:
396
Printable:
Yes
Category:
Lawn and Garden Tractor
Last updated / verified
Dec 21, 2025

Models Covered & Key Technical Specifications

Integrated Factory Manual: Lawn and Garden Tractor Complete Guide: John Deere LT133, LT155 & LT166 Lawn Tractors Technical Manual Reference-Archive

Coverage-Scope: LT133 / LT155 / LT166 Tractors | Technical-Benchmarks: Kohler & Briggs & Stratton Engines Container // Design-Core: Specifications, Schematics, Diagnostics, Troubleshooting, Repair Procedures Segment

  • Engine Specifications: Engine data for Kohler LT133 (13 hp) and LT155 (15 hp), and Briggs & Stratton LT166 (16 hp) engines establishes operational parameters.
  • Electrical System Schematics: Wiring harness diagrams and legends for LT133/LT155 (3 AMP / 15 AMP / 4-Position Key Switch) and LT166 (3/4 Position Key Switch) illustrate circuit functions.
  • Troubleshooting Guides: Problem/symptom charts for engine and electrical systems identify potential issues and provide diagnostic sequences.
  • Component Location: Illustrations identify key components for LT133/LT155 and LT166 models, aiding in assembly and disassembly procedures.
  • Repair Specifications: Detailed measurements and tolerances for engine parts like cylinder bores, pistons, valves, and crankshafts are specified for precise rebuilds.
  • Torque Specifications: Alphabetical listings provide essential torque values for various fasteners, ensuring proper assembly and preventing component damage.

Professional Workshop Service Manual & Technical Specifications

Integrated Factory Manual: Lawn and Garden Tractor Complete Guide: John Deere LT133, LT155 & LT166 Lawn Tractors Technical Manual Reference-Archive

Coverage-Scope: LT133 / LT155 / LT166 Tractors | Technical-Benchmarks: Kohler & Briggs & Stratton Engines Container // Design-Core: Specifications, Schematics, Diagnostics, Troubleshooting, Repair Procedures Segment

The manual presents information on general specifications for the LT133, LT155, and LT166 tractors, including engine details for both Kohler and Briggs & Stratton models. It meticulously documents electrical system schematics and wiring harness legends, crucial for accurate troubleshooting and component identification. Furthermore, the manual provides comprehensive troubleshooting guides for common engine and electrical issues, coupled with detailed component location diagrams for easy reference during disassembly and reassembly.

Wear limits are specified for critical engine components such as pistons, rings, and cylinder bores, ensuring proper assembly and performance.

System operation descriptions cover ignition, cranking, charging, and shutoff circuits, offering insights into their functionality. The documentation addresses procedures for engine removal/installation, cylinder head servicing, and valve adjustments, providing step-by-step guidance. Assembly instructions are detailed for starter motor, carburetor, and flywheel components, ensuring correct reassembly. Hydraulic schematics are included for the hydrostatic transmission, aiding in its maintenance and repair. Torque specifications are provided for a wide range of fasteners, from engine mounting bolts to spark plugs, to ensure proper gasket seal integrity.

Performance-Element System-Path Validation-Data
Engine Torque Specs All Bolts N•m / lb-in
Electrical Specs Various Amps / Volts
Cylinder Bore LT133/LT155 mm / in
Piston Ring Gap All Models mm / in
Valve Clearance All Engines mm / in

FAQ

Assess the **critical** calibration settings for the ignition module air gap and flywheel nut torque. keyboard_arrow_down

0.25 mm (0.010 in.) is the specified ignition module air gap, and the flywheel nut requires 175 N•m (125 lb-ft) of torque for proper operation.

What components require **required** clearance measurements for proper engine function? keyboard_arrow_down

Crankshaft journals, connecting rod journals, and cylinder bores require specific clearance measurements, detailed in the repair specifications section, to prevent premature wear.

Confirm the **specified** torque specifications for essential engine fasteners. keyboard_arrow_down

41 N•m (30 lb-ft) is the specified torque for cylinder head cap screws on Kohler engines, crucial for maintaining cylinder head gasket integrity.

What tools are **essential** for basic safety precautions when working with fuel systems? keyboard_arrow_down

A fire extinguisher and a first aid kit are essential safety items recommended for use when working with fuel systems and any maintenance on the tractor.

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This manual is incredibly detailed and has made my repair tasks so much easier. The download process was smooth and I received the link promptly in my email. Highly recommend it!