Makita UC4000 Electric Chainsaw Manual

The Makita UC4000 is a 16-inch electric chainsaw designed for general pruning, cutting, and trimming tasks. It features a powerful 14.5 AMP motor, automatic oiler, tool-less chain tensioning, and a low noise design. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 14.5 AMP electric motor, 16-inch Oregon bar and chain, automatic oiler system, tool-less chain tensioner, rear handle with soft grip, and safety chain brake.

Safety Instructions

Read all instructions before use. Always wear appropriate safety gear.

1. Personal Protective Equipment: Wear safety glasses, hearing protection, gloves, and chainsaw chaps.
2. Work Area Safety: Keep bystanders and pets at least 15 feet away. Ensure secure footing.
3. Electrical Safety: Use only 120V outlet with proper grounding. Keep cord away from cutting area.
4. Kickback Prevention: Hold saw firmly with both hands. Do not cut with tip of bar.
5. Chain Brake: Test chain brake before each use by pushing forward on hand guard.

WARNING! Risk of serious injury or death. Do not operate without proper training and safety equipment.

Assembly & Installation

Unpack and inspect all components. Assemble before first use.

1. Attach Guide Bar: Place bar onto mounting studs with chain sprocket cover removed.
2. Install Chain: Position chain on bar with cutting teeth facing forward on top.
3. Tension Chain: Use tool-less tensioning knob to adjust until chain snaps back when pulled.
4. Fill Oil Tank: Use only chainsaw bar oil. Fill to MAX line through oil filler cap.
5. Power Cord: Connect to grounded 120V outlet. Use extension cord rated for 15 AMP minimum.

CAUTION! Ensure chain is properly tensioned and moves freely before operation.

Specifications

• Model: UC4000
• Motor: 14.5 AMP, 120V AC, 60Hz
• Bar Length: 16 inches (40 cm)
• Chain Pitch: .325 inch
• Chain Gauge: 0.050 inch
• Oil Capacity: 8.5 fl oz (250 ml)
• Sound Pressure: 94 dB(A)
• Vibration Level: 2.5 m/s²
• Weight: 10.1 lbs (4.6 kg)
• Recommended Use: Pruning, cutting firewood, general property maintenance

Controls and Components

Main components: Front hand guard/chain brake, rear handle with trigger switch, lock-off button, tool-less chain tensioner, oil filler cap, and oil level window.

Operation Controls: Trigger switch with lock-off button for safety. Chain brake activates when hand guard is pushed forward. Automatic oiler requires no manual operation.

Adjustments: Chain tension via side knob. Bar position can be rotated for even wear. Oil flow rate is factory set; no user adjustment needed.

Operation Guide

Proper cutting techniques ensure safety and efficiency.

1. Starting: Ensure chain brake is disengaged. Press lock-off button and squeeze trigger.
2. Basic Cutting: Let chain reach full speed before contacting wood. Use middle of bar for cutting.
3. Pruning: Cut small branches first. Support larger limbs to prevent pinching.
4. Limbing: Work from trunk outward. Keep saw stable and maintain firm grip.
5. Bucking: Cut from top of log. Use wedges for logs under tension.
6. Stopping: Release trigger and engage chain brake before setting saw down.

Tip: Allow chain to cool for 5 minutes before tension adjustment or storage.

Chain Maintenance

Regular maintenance ensures optimal performance and safety.

1. Chain Sharpening: Use round file (5/32 inch) at 30° angle. File all cutters evenly.
2. Depth Gauges: File depth gauges to 0.025 inch below cutter height.
3. Chain Tension: Check every 15 minutes of operation. Adjust when chain sags more than 1/4 inch from bar.
4. Bar Maintenance: Clean bar groove weekly. Flip bar monthly for even wear.
5. Sprocket Inspection: Check drive sprocket every 50 hours for wear.

WARNING! Always disconnect power before performing maintenance. Wear gloves when handling chain.

Cleaning & Storage

Unplug and clean after each use. Store in dry, secure location.

1. Exterior Cleaning: Wipe with dry cloth. Remove sawdust from air vents.
2. Bar and Chain: Clean with stiff brush. Apply light oil to prevent rust.
3. Oil System: Check for leaks. Clean oil ports with compressed air if clogged.
4. Storage: Empty oil tank for long-term storage. Hang saw or store in case.

CAUTION! Do not use water or solvents for cleaning. Store out of reach of children.

Regulatory Information

UL Listed: Conforms to UL STD 60745-1, 60745-2-13. EPA Certified: Meets environmental standards. Copyright © Makita Corporation. All rights reserved. For support, visit www.makitatools.com or contact 1-800-4MAKITA (1-800-462-5482).

Troubleshooting

Service: For repairs, contact authorized Makita service center only.

Warranty: 1-year limited warranty from date of purchase.