Troubleshooting

Unplug the machine before attempting any repairs.

If the Planer runs roughly or has excessive vibration:

1.Verify that Knife Blades are not chipped, are securely installed, and are adjusted properly.

.	Verify that all chains and belts are properly routed on their pulleys and sprockets, and are not
	loose.

3.Verify that the Table is not damaged, and operates smoothly.

4.Be sure the Crank is removed from the Planer before operation.

If the Planer will not operate at all:

1.Verify that the planer is plugged in, the main circuit breaker in the power source is operational, and the integral circuit breaker on the machine is operational. If either circuit breaker is open, investigate further to determine and repair the cause of the fault.

.	Verify that the Planer is not jammed.

3.Inspect the carbon brushes in the motor to determine if they are in good condition.

4.Look for broken, damaged, or loose electrical connections. Repair before continuing.

If the Motor runs roughly or slowly:

1.Check for debris in the cutting assembly or in the chains or belts.

.	Inspect the carbon brushes, replace if necessary.

3.Verify that the power source supplies the correct Voltage and Amperage.

If the Planer cuts unevenly, poorly, or produces a rough or chipped finish:

1.Inspect the Knife Blades to be sure they are properly installed and adjusted.

.	Remove the Knife Blades and have them sharpened by a sharpening service.

3.Review the suggestions for selecting a workpiece, and adjusting the depth of cut.

4.Cut only with the wood grain.

Changing the Carbon Brushes:

1.Check carbon brushes every 10-15 hours of opera- tion.

.	Brushes are accessed by turning the machine on its
	side. Motor is on machine’s underside. The brush
	holders are on the sides of the motor. Remove brush
	holders by turning them with a coin.

3.Each brush has a line marked on its side. When the brush has worn to the line, or if it is cracked or chipped, replace both carbon brushes.

Figure 12. Checking and

Replacing the Carbon Brushes

SKU 41921

For technical questions, please call 1-800-444-3353.

Page 10

41921, 10" Auto Planer specifications

The Harbor Freight Tools 10" Auto Planer, model number 41921, is a versatile and efficient tool designed for both hobbyists and professionals seeking to achieve precision in woodworking projects. This powerful machine offers an array of features that make planing boards and timber easier, quicker, and more accurate.

One of the standout features of the 10" Auto Planer is its robust motor, which delivers 15 amps of power. This enables the planer to handle a broad range of hardwoods and softwoods with ease, providing a smooth finish even on tough materials. With a maximum planing width of 10 inches, it accommodates a variety of board sizes, making it suitable for various applications, from furniture making to cabinetry construction.

The 10" Auto Planer boasts a cutting depth adjustment that allows users to set the depth of material removal with precision. This feature is critical for achieving the desired finish and thickness required for different projects. The planer can handle cuts up to 1/8 inch deep, ensuring efficient removal of material without excessive effort.

In terms of technology, the 41921 model incorporates a double-edged knife system, which increases the longevity of the cutting blades and enhances the quality of the cut. These reversible knives can be easily replaced, allowing users to maintain the tool's peak performance without significant downtime.

The design of the planer emphasizes user safety and ease of operation. It features automatic feed rollers that pull the material through the machine, ensuring consistent results on each pass. The integrated dust port helps keep the work area clean by minimizing wood shavings, making it easier to manage mess during and after use.

Additionally, the sturdy construction of the 10" Auto Planer ensures durability and stability. Its heavy-duty base minimizes vibrations, contributing to smoother operation and improved accuracy during planing.

Overall, the Harbor Freight Tools 10" Auto Planer, model 41921, combines power, precision, and user-friendly features to make woodworking projects more manageable. Whether you're a seasoned woodworker or just starting, this planer is an excellent investment for achieving professional-grade finishes in your woodworking endeavors.