Harbor Freight Tools 93853 operating instructions Figure G

Models: 93853

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3.To replace the Motor Carbon Brushes: It may become necessary at sometime to replace or clean the two Carbon Brushes (76) when the Motor performance decreases, or stops working completely. The Carbon Brushes are located on each side of the Motor Casing (61). To replace the Carbon Brushes, remove the two Brush Holder Covers (79). Remove the Brush Caps (77). Then, remove the two Carbon Brushes from the two Brush Holders (75). If the Carbon Brushes are worn down, replace both Carbon Brushes. If, however, the Carbon Brushes are just dirty they may be cleaned by rubbing them with a pencil eraser. If cleaning and replacing used brushes, try to install them in the same holders and in the same direction they were removed. When installing the Carbon Brushes, make sure the carbon portion of the Carbon Brushes contact the Motor’s Rotor and that the springs face away from the Motor. Also, make sure the springs operate freely. After replacement or cleaning, replace the two Brush Holder Covers.

NOTE: New Carbon Brushes tend to arc or spark when first used until they wear and conform to the Motor’s Rotor. (See Figure G.)

4.Every 70 to 80 hours of tool use: Remove the Oil Cap (45) and replace the grease. Fill the tool with approximately 1-1/4 ounces of #3 Lithium-based grease (not included). Then, replace the Oil Cap. (See Figure E.)

5.To clean the exterior parts of the Demolition Hammer, use only a clean cloth and mild detergent. Then, dry. Use a vacuum or compressed air to clean the Motor Air Vents. Do not immerse any electrical part of the tool in any liquids.

6.When storing, store the tool in a clean, dry, safe location out of reach of children and other unauthorized people.

7.CAUTION! All maintenance, service, or repairs not mentioned in this manual must only be performed by a qualified service technician.

BRUSH CAP

(77)

BRUSH HOLDER COVER

(79)

FIGURE G

BRUSH HOLDER

CARBON BRUSH

(75)

(76)

SKU 93853

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

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Harbor Freight Tools 93853 operating instructions Figure G