Dremel 398-49 owner manual Carbon Brushes, Maintenance of Replaceable Brushes Model

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DM 2610934164 05-06 10/6/06 8:41 AM Page 15

Maintenance

Service

!Preventive maintenance WARNING performed by unauthorized personnel may result in misplacing of internal wires and components which could cause serious hazard. We recommend that all tool service be performed by a

Dremel Service Facility.

CARBON BRUSHES

The brushes and commutator in your tool have been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every two to six months the brushes be examined. Only genuine Dremel replacement brushes specially designed for your tool should be used.

BRUSH

 

DOOR

CURVED END OF

 

 

BRUSH MUST

BRUSH

MATCH CURVATURE

OF HOUSING

 

BRUSH

SPRING

MAINTENANCE OF REPLACEABLE BRUSHES MODEL 398-49

The brushes should be inspected frequently when tools are used continuously. If your tool runs sporad- ically, loses power, makes unusual noises or runs at a reduced speed, check the brushes. To continue using the tool in this condition will permanently damage your tool.

To Remove Brush Door

Disconnect the tool from the power supply. Each brush door is held in place by a snap latch. To disengage latch, place screwdriver end of wrench (included) in slot at rear of door and pry up as shown in Figure 1. With latch disengaged, using a little force, pull up rear of door and lift away brush door and spring assembly from housing, Figure 2.

Check Both Brushes

Turn tool so the brush falls out of holder and check each brush. If the brush is less than 3,2mm long and the end surface of the brush that contacts the commutator is rough and/or pitted, they should be

FIG. 1

FIG. 2

replaced. Check both brushes. Usually the brushes will not wear out simultaneously. If one brush is worn out, replace both brushes. Make sure the brushes are installed as illustrated. The curved surface of the brush must match the curvature of the commutator.

To Replace Brush Door

Rest squared underside of brush door on the squared cavity openings. Check to be sure the spring rests on the V groove of the brush, Figure 3. Push front of door down into the slot, Figure 4, then push down and snap the rear latch into it’s slot, Figure 5.

After replacing brushes the tool should be run at no- load; place it on a clean surface and run it freely for 5

Any Questions Call

03-5415317

FIG. 3

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Contents Series Digital High Speed Rotary Tool Operating/Safety Instructions ModelWork Area Power Tool Safety RulesElectrical Safety Personal SafetySafety Rules for Rotary Tools ServiceAccidentally activate the switch Some dust created by power Functional Description and Specifications Rotary ToolCollet capacities 8mm, 1,6mm, 2,4mm, 3,2mm Collet AssemblyBalancing Accessories FLEX-SHAFT to Rotary Tool InstallationDo not Collet and Accessory AssemblyCollet Removal and Replacement Disengagement of the Flex-ShaftFor use in drywall Cutting Guide InstallationOperating Instructions for Cutting Guide Attachment To attach, follow the four steps shown belowOperating Instructions for Rotary Tool Flex-Shaft Attachment Using the Rotary Tool Questions or Problems ? CallNeeds for Slower Speeds Operating Speeds for AccessoriesDigital Speed Selector Switch Electronic Feedback Circuitry EFCDepending on cutting direction relative to grain Use only Dremel Tested, High Performance AccessoriesSilicon Carbide Grinding Stones Aluminum Oxide Grinding StonesSanding Accessories Maintenance Maintenance of Replaceable Brushes ModelCarbon Brushes If an extension cord is Warning necessary, a cord with CleaningExtension Cords BearingsDremel Accessories Bristle Brushes Wire BrushesPolishing Accessories Sanding AccessoriesSpiral Cutting Bit Cutting WheelsDrywall Cutting Bit Tile Cutting BitCutting bit Questions or Problems? CallDremel Attachments 565 566 Multipurpose Cutting Kit Tile Cutting KitModel 231 Shaper/Router Table Model 330 Router AttachmentModel 225 Flex-Shaft Model 212 Drill Press810 824 801 826 650 801 8252610930692 Wrench 2615298792 Field Assembly 26109079422610928647 Housing Set 2615302807 Collet Lock Assembly810
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