This document is an operator's manual for a Craftsman 3.5 HP, 16-inch electric chain saw, Model No. 316.341070. It provides essential information regarding the safe operation, assembly, maintenance, and repair of the device.
The primary function of this device is to cut wood, including felling small trees, pruning, and cutting firewood. It is classified as a Class 2C saw, intended for infrequent use by homeowners, cottagers, and campers. The chain saw is designed for two-handed operation to ensure user safety and control.
Important Technical Specifications:
- Power: 3.5 Peak H.P.
- Guide Bar Length: 16 inches
- Ampere Rating: 13.5 Amps (at 110/120 Volts AC)
- Weight: Approximately 11.3 lbs. (5.1 kg) with bar and chain
- Insulation: Double-insulated for enhanced electrical safety.
- Cord Types: Requires SW-A, SOW-A, STW-A, STOW-A, SJW-A, SJOW-A, SJTW-W or SJTOW-A cord types for extension cords.
- Minimum Gauge Wire for Extension Cords:
- 25 ft. / 7.5m: 16 Gauge
- 50 ft. / 15m: 16 Gauge
- 100 ft. / 30m: 14 Gauge
- Oil Reservoir Capacity: 4.5 ozs, providing lubrication for 12-15 minutes of sawing.
- Saw Chain: Low kickback saw chain (Sears Part # 36121, 55 Drive Links) is specified to reduce kickback danger.
- Certifications: TUV Rheinland of North America, Inc. (TUV) Listed.
Usage Features:
- Two-Handed Operation: The saw is designed to be held with both hands for stability and control, with the right hand on the rear handle and the left hand on the front handle.
- Automatic Oiler System: The chain saw is equipped with an automatic oiler that delivers the proper amount of oil to the bar and chain, with no flow adjustment needed. The oil reservoir level can be checked via an inspection window.
- Lock/Off Button: A safety feature that prevents accidental acceleration of the saw motor. The trigger cannot be squeezed unless the lock/off button is depressed.
- Chain Brake®/Hand Guard: This safety feature protects the operator's left hand and stops chain movement abruptly if activated, cutting off power to the motor. It is activated by pressure against the guard or during kickback. The motor will not start if the Chain Brake® is engaged.
- Cord Retainer: A built-in retainer on the rear handle prevents the extension cord from pulling out during operation.
- Bucking Spikes: These help to provide leverage and stability during cutting.
- Chain Catcher: Designed to intercept a whipping chain in case of breakage or derailment, reducing injury risk.
- Cutting Techniques: The manual details specific techniques for felling (notch cuts, felling cuts, retreat path planning) and limbing (removing branches from a fallen tree), and bucking (cutting a fallen log into lengths, including using a sawhorse). It emphasizes avoiding tip contact to prevent kickback and maintaining full speed during cuts.
Maintenance Features:
- Maintenance Checklist: A comprehensive checklist outlines routine maintenance tasks to be performed before each use, after each use, and at 10 and 20 hours of operation.
- Chain Tension Adjustment: Critical for performance and chain life, tension should be checked before starting and during cutting. The manual provides instructions for loosening and tightening the chain using the bar bolt knob and chain tension ring. New chains require more frequent adjustment during the break-in period.
- Guide Bar Maintenance: Regular lubrication of the sprocket tip (using a lube gun) and cleaning of the bar grooves and oil passages are essential to minimize wear and ensure proper chain lubrication. The guide bar should be turned frequently to ensure even wear.
- Chain Sharpening: Cutters need to be sharpened at the correct angle and depth. Professional sharpening is recommended for inexperienced users, though special tools are available for those comfortable sharpening their own chain.
- Double Insulation: The appliance has two systems of insulation instead of grounding, and no serviceable parts inside. Repairs should only be performed by a Sears or qualified service dealer using identical replacement parts.
- Cord Inspection: Periodical inspection of extension cords and the unit's power connection for deterioration, cuts, cracks, or damage is advised.
- Cleaning: The unit should be cleaned with a damp sponge and mild soap, avoiding dousing with water. Air intake and vents must be kept clear of debris to prevent motor overheating.
- Chain Brake® Test: A procedure is outlined to test the functionality of the chain brake before each use.
- No Motor Lubrication Required: The motor is equipped with lifetime lubricated bearings.
The manual strongly emphasizes safety precautions, including wearing protective gear, maintaining a firm grip, being aware of kickback, and avoiding operation in hazardous conditions or with damaged equipment. It also provides troubleshooting steps for when the unit does not start.
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