1978 John Deere Spitfire 340 Snowmobile Service Manual

This manual provides comprehensive repair information for the 1978 John Deere Spitfire 340 Snowmobile, including engine specifications, fuel system, and electrical diagnostics. Part number: TM1191.

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Document Details

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Document Number / Seller:
28042 / Thomas Jones
File Size:
7.50 MB
File Type:
PDF
Language:
English
Pages:
145
Printable:
Yes
Category:
Snowmobile
Last updated / verified
Apr 7, 2025

Models Covered & Key Technical Specifications

John Deere Spitfire 340 Snowmobile (TM1191) -- 1978 Repair guide for all 1978 Spitfire 340 configurations | Series Drivetrain Segment.

  • Engine Specs Category: Engine Model Number: K340-2FA is standardized to manufacturer requirements.
  • Fuel System Specs Category: For carburetor operation, Mikuni (Slide Valve) is rated at 210 throttle valve settings.
  • Electrical System Specs Category: Ignition system voltage is 12 Volt -- signifies the ignition coil output Threshold.
  • Suspension Specs Category: The shock absorber requires 33.25 in. for standard operation Logic.
  • Brake System Specs Category: Track width reaches 36.5 mm Parameters.
  • Drive Belt Specs Category: Clutch alignment is verified to ensure proper operation Range.

Professional Workshop Service Manual & Technical Specifications

John Deere Spitfire 340 Snowmobile (TM1191) Manual: John Deere Spitfire 340

Technical-Scope: Service Manual // Conceptual-Layout: Snowmobile / Engine Logic // Performance-Values: Repair Procedures & Specifications.

Repair data is categorized into:

  • Engine Principles of Operation and Specifications
  • Fuel System Components and Adjustments
  • Electrical System Testing and Troubleshooting
  • Suspension Wear Bars and Track Tension
  • Drive Belt Alignment and Installation
  • Brake System Inspection and Adjustment

This manual details repair procedures for the John Deere Spitfire 340 Snowmobile. It covers essential mechanical systems, diagnostic procedures, and adjustment specifications. The documentation addresses various engine and chassis components, providing a structured approach to maintenance. Assembly instructions are detailed for key parts like the drive sheave and recoil starter. Hydraulic schematics are included for system clarity. Steering component information is provided for safe operation. The manual documents torque specifications for the drive sheave retaining cap screws to ensure proper oscillation integrity.

Key Systems Covered:

  • Engine Mechanical Components
  • Fuel Delivery System
  • Electrical Ignition and Lighting
  • Suspension and Track Systems
  • Drive Train Components
  • Braking System

FAQ

Specify the **lubrication** requirements for the drive sheave bearings. keyboard_arrow_down

Never-Seez lubricant (PTS69) is required for the drive sheave installation to ensure proper functioning.

What is the **exact** testing parameters for the CDI unit with a JDM-74 tester? keyboard_arrow_down

Tests 1, 2, and 3 for the CDI unit involve specific tester settings and wiring connections to ensure correct output measurements.

Calculate the **specific** diagnostic procedures for engine ignition timing. keyboard_arrow_down

Ignition timing procedures involve setting the timing light to HIGH range and observing the flywheel mark against the engine running at 6500 rpm.

What values **designated** for brake cable adjustment are required? keyboard_arrow_down

Brake cable adjustment requires measuring the distance from the lever to the handgrip, which should be 1 to 1-1/2 inches (25 to 38 mm).

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This manual is incredibly detailed and easy to follow. The diagrams are clear, making it simple to troubleshoot issues. The download process was smooth, and I received the link quickly. Highly recommend for any John Deere Spitfire owner!