Technical Manual TM-1197 (Nov-81): John Deere Trailfire 340, 440 & Trailfire LX Snowmobiles (1979-1982)
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Sample pages from the Technical Manual TM-1197 (Nov-81): John Deere Trailfire 340, 440 & Trailfire LX Snowmobiles (1979-1982) manual
Purchase Information
Technical Specifications
- Document Number / Seller:
- 28045 / Amy Moore
- File Size:
- 7.75 MB
- File Type:
- Language:
- English
- Pages:
- 223
- Printable:
- Yes
- Estimated Download Time:
- 0.16 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Snowmobile
- Brand:
- John Deere
- Reviewed and Approved:
- Jan 1, 2026
John Deere Models and Parts Covered in this Snowmobile Manual
- John Deere TRAILFIRE (1979-1982)
- John Deere 340 Trailfire (1979-1982)
- John Deere 440 Trailfire (1979-1982)
- John Deere Trailfire LX (1982)
Complete Manual Information
John Deere Trailfire Series Technical Manual - 1981 Edition
This professional workshop manual provides the necessary system architecture and factory benchmarks to maintain the Fireburst series of two-stroke, air-cooled engines. A hyper-specific maintenance critical path involves the mandatory replacement of piston pin retainers with new units during every assembly cycle to prevent catastrophic engine failure and ensure maximum operational uptime.
Technical Applicability & Serial Ranges
340 Trailfire (339cc Fireburst TA340A)
- Serial Number Range: J34FH 095001M to J34FJ 120000M (1979-1980 Models)
- Serial Number Range: J34FK 155001M and Up (1981-1982 Models)
440 Trailfire (436cc Fireburst TA440A)
- Serial Number Range: J44FH 095001M to J44FJ 120000M (1979-1980 Models)
- Serial Number Range: J44FK 155001M and Up (1981-1982 Models)
Trailfire LX (436cc Fireburst TA440A with Oil Injection)
- Serial Number Range: J44FL 190001M and Up (1982 Models)
Performance Optimization & Safety Proof Points
- Precision Calibration: Utilize altitude-specific main jet charts and Mikuni VM-34 carburetor tuning parameters to maintain stoichiometric ratios across varying elevations.
- Structural Integrity: Reference exact aluminum and HSLA steel chassis specifications to ensure frame alignment and suspension geometry remain within factory tolerances.
- Ignition Reliability: Execute Capacitor Discharge Ignition (CDI) diagnostic sequences using the JDM-74 tester to isolate exciter coil or pulser coil malfunctions.
Document Metadata
- Print Number: TM-1197 (Nov-81)
- Total Pagination: 222 Pages
- Technical Coverage: Sections 10 through 70 (General through Service Tools)
Technical Depth & Factory Benchmarks
Engine performance is verified through rigorous static timing and compression testing. Factory-specified compression for the 340 engine must maintain 125 to 140 psi, while the 440 and LX variants require 130 to 155 psi for optimal combustion efficiency. Variation between cylinders must not exceed 10 psi to prevent harmonic imbalance.
Visual Navigation Aids
- Component Explosion: Detailed schematics for the Mikuni twin-float carburetor and the John Deere (Comet) 102C/94C drive sheaves.
- Electrical Logic: Full-page wiring diagrams for both early (Pre-155,093) and late-model Capacitor Discharge Ignition systems.
- Suspension Geometry: Exploded views of the slide rail suspension and involute track drive mechanisms.
Table of Contents
- Section 10 - General: Snowmobile Identification, Specifications, Tune-Up, and Lubricants.
- Section 20 - Engine: Basic Engine Overhaul, Cooling System, and Recoil Starter.
- Section 30 - Fuel System: Mikuni Carburetor, Fuel Pump, and Oil Injection System.
- Section 40 - Electrical System: CDI Diagnosis, Lighting, and Optional Electric Start.
- Section 50 - Power Train: Drive/Driven Sheaves, Chain Case, and Mechanical Disk Brake.
- Section 60 - Suspension: Slide Suspension, Track Repair, Skis, and Steering Alignment.
- Section 70 - Service Tools: Essential and Convenience Tool Inventories.
Operational Limits & Specifications
| Description | 340 Trailfire | 440/LX Trailfire |
|---|---|---|
| Cylinder Bore Wear Limit | 2.3661 in (60.10 mm) | 2.6811 in (68.10 mm) |
| Piston Pin Diameter Min | 0.6283 in (15.96 mm) | 0.6283 in (15.96 mm) |
| Crankshaft Runout Max | 0.002 in (0.05 mm) | 0.002 in (0.05 mm) |
| Spark Plug Type | Champion QN-3 | Champion QN-3 |
| Spark Plug Gap | 0.025 in (0.635 mm) | 0.025 in (0.635 mm) |
Torque Sequences & Parameters
- Cylinder Head Hardware: 16 ft-lbs (22 N-m) in a criss-cross pattern.
- Flywheel Retaining Nut: 60 ft-lbs (81 N-m).
- Drive Sheave Cap Screw: 50 ft-lbs (68 N-m).
- Fan Pulley Nut: 47 ft-lbs (64 N-m).
- Chain Case Lubricant: SAE 90 API-GL5 gear oil.
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Frequently Asked Questions - John Deere Snowmobile Manual
Is this manual suitable for beginners?
Yes, this John Deere manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Snowmobile maintenance and repair.
What file format will I receive?
You will receive this manual as a PDF file (7.75 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your John Deere Snowmobile manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
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