1990 John Deere 490 Excavator Technical Manual
Technical reference for the John Deere 490 Excavator, covering operation and repair procedures. Documents engine, track systems, and hydraulics. PN TM1302.
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Models Covered & Key Technical Specifications
Integrated Configuration Factory Manual: John Deere 490 Excavator Manual (1990) - TM1302 Diagnostic-Reference
John Deere 490 Excavator (TM1302) | Section 02 Axles And Suspension Systems Container
- Documented Specifications: Track link height (new) 92 mm establishes the new measurement for the track component.
- Technical Specifications: For optimal wear, track pitch per link (new) 171.45 mm requires adherence to the specified limit.
- Universal Measurements: Master pin diameter (new) 33.3 mm -- signifies the nominal dimension for the pin.
- Maximum Tolerances: The track pin diameter requires 33.5 mm for proper operation Logic.
- System Requirements: Bushing and master bushing outside diameter (new) 50.4 mm establishes the correct fitment Parameters.
- Operational Benchmarks: Bushing inside diameter (new) 33.8 mm governs the internal clearance for the component Range.
Professional Workshop Service Manual & Technical Specifications
Integrated Configuration Factory Manual: John Deere 490 Excavator Manual (1990) - TM1302 Diagnostic-Reference
John Deere 490 Excavator (TM1302) | Section 02 Axles And Suspension Systems Container
| Component | System-Path | Context |
|---|---|---|
| Track Link Height | New | 92 mm |
| Track Pitch | Nominal | 171.45 mm |
| Master Pin Diameter | New | 33.3 mm |
| Track Pin Diameter | New | 33.5 mm |
| Bushing Outside Diameter | New | 50.4 mm |
| Bushing Inside Diameter | New | 33.8 mm |
The manual presents information on:
Systems
Diagnostic procedures are covered for the hydraulic system, ensuring proper function and maintenance.
Procedures
Wiring diagrams are provided for the track system, detailing component connections and flow paths.
Introduction
Fuel system procedures are documented for the engine, outlining maintenance and troubleshooting steps.
Table
Adjustment procedures are detailed for the undercarriage components, specifying tolerances and methods.
Specifications
Timing procedures are documented for the various engine systems, ensuring correct operational sequence.
This technical manual documents torque specifications for various components to ensure proper service interval reliability.
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