2002 John Deere Z-Trak F620, F680, F687 Service Manual
Complete repair information for your John Deere Z-Trak F620, F680, F687. Includes detailed procedures, wiring diagrams, and specifications. PN TM1678 JUN02
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Models Covered & Key Technical Specifications
John Deere F620, F680, F687 (TM1678 JUN02) – 2002 Z-Trak Service Manual
Complete repair information for your John Deere Z-Trak F620, F680, F687. Includes detailed procedures, wiring diagrams, and specifications. PN TM1678 JUN02 | Z-Trak Mowers
- Engine Specifications: 20 HP Kohler CH20S and 23 HP Kohler CH23S engines provide reliable power.
- Fuel Tank Capacity: F620 holds 17 L (4.5 gal), while F680 and F687 models hold 26.5 L (7 gal).
- Drive Wheels: Equipped with 20 x 10-10 tubeless drive wheels for excellent traction.
- Tire Pressure: Maintain 69 kPa (10 psi) in the drive wheels for optimal performance.
- Mower Deck: Features cutting widths of 122, 137, or 152 cm (48, 54, or 60 in.) for versatile landscaping.
- Machine Dimensions: Overall width without mower is 100 cm (39.5 in.) for maneuverability.
Professional Workshop Service Manual & Technical Specifications
John Deere Z-Trak F620, F680, F687 Technical Manual: 2002 Service & Repair Manual for Z-Trak Mowers Documentation-Set
Coverage-Scope: 366 pages // Serial-Range: All Models // Maintenance-Category: Engine, Electrical, PTO, Hydraulics, Troubleshooting
The documentation is partitioned into
Engine Section Overview
The Engine section provides comprehensive details on the Kohler CH20S and CH23S engines. It includes specifications, troubleshooting guides for various engine malfunctions, and detailed repair procedures for components such as the fuel tank, fuel filter, carburetor, and more. Specific sub-sections cover testing and adjustments, including cylinder leakdown tests and crankcase vacuum tests.
Electrical System Schematics
The Electrical section offers detailed wiring diagrams and component locations for the F620 and F680/F687 models. It covers power circuits, starting circuits, ignition and charging systems, as well as troubleshooting charts for common electrical issues. Each component and wire is clearly identified for easy referencing.
PTO/MCS Clutch Operation and Diagnosis
This section details the operation and diagnosis of the Power Take-Off (PTO) clutch and the Material Collection System (MCS) clutch. It explains how these systems are energized and provides troubleshooting steps for potential malfunctions, ensuring optimal performance of these features.
Wiring Harness Diagrams
Extensive wiring harness diagrams are provided for both the F620 and F680/F687 models. These diagrams illustrate the main wiring harness, engine wiring harness, and optional systems like the fuel gauge and material collection system, facilitating efficient troubleshooting and repair.
Troubleshooting Charts and Procedures
The manual includes detailed troubleshooting charts for both the electrical system and the engine. These charts help to quickly identify potential problems and guide the technician through diagnostic steps. Specific procedures for common issues like hard starting, low power, or electrical faults are clearly outlined.
Specifications and design subject to change without notice.
Torque specifications for various engine components, such as mounting nuts and cap screws, are documented to ensure proper assembly and seal compression uniformity.
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