Assessments - 2, GPA: 3.5
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WARNING: DO NOT PRESS THE GRINDER FORCIBLY AGAINST THE SURFACE TO BE GROUND. HEAVY PRESSURE CAN RESULT IN WHEEL BREAKAGE AND SERIOUS INJURY. IT CAN ALSO DAMAGE THE SURFACE BEING GROUND OR DAMAGE THE GRINDER’S MOTOR. 4. Use proper grinding angle. Grind only with the wheel’s edge by lifting the grinder 15° to 30°, as shown in Fig. 2. CAUTION: DO NOT USE THE ENTIRE SURFACE OF THE DEPRESSED CENTER WHEEL. USE ONLY THE EDGE OF THE DEPRESSED CENTER WHEEL. 4 1/4-Inch Disc Grinder Operator's Manual Operation OPERATION (CONTINUED): 5. Move the grinder in the proper direction: When using a new depressed center wheel in direction A (Fig. 2), the wheel edge may cut into the workpiece. In this case, grind in direction B (Fig. 2). Once the wheel edge is worn, the workpiece can be ground in both directions. NOTE: The wheel provided (resinoid wheel) is rated as Class A grain and # 36 grain size. It is most suitable for heavy grinding of steel and other types of materials. 6. Adjust operation to desired finish: For a fine finish, decrease pressure by lifting slightly. Grind slowly and at the appropriate speed. CAUTION: THE REVOLVING DEPRESSED CENTER WHEEL WILL CREATE AIR TURBULENCE. DO NO LAY THE GRINDER DOWN IN AREAS OF DUST OR DIRT UNTIL IT HAS COME TO A COMPLETE STOP. DEPRESSED CENTER WHEEL ASSEMBLY AND DISASSEMBLY: WARNING: NEVER ATTEMPT TO ASSEMBLE OR DISASSEMBLE THE DEPRESSED CENTER WHEEL WHILE THE GRINDER IS CAPABLE OF BEING TURNED “ON”. BE SURE POWER SWITCH IS IN THE “OFF” POSITION AND THE ELECTRICAL CORD HAS BEEN DISCONNECTED FROM THE RECEPTACLE. 1. Assembling a. Turn the disc grinder upsidedown so that the spindle is facing upward. b. Align the oval-shaped indentation of the wheel washer with the notched part of the spindle, then attach them. c. Fit the protuberance of the depressed center wheel onto the wheel washer. d. Screw the wheel nut onto the spindle. e. While pushing the lock pin with one hand, lock the spindle by turning the depressed center wheel slowly with the other hand. Tighten the wheel nut by using the supplied wrench as shown in Fig. 3. CAUTION: TIGHTEN THE WHEEL NUT SECURELY AND CONFIRM THAT THE DEPRESSED CENTER WHEEL DOES NOT WOBBLE. 2. Disassembling: To remove the depressed center wheel, follow the (Fig. 3) above-mentioned procedure in reverse order. (Fig. 2) 4 1/4-Inch Disc Grinder Operator's Manual Maintenance and Inspection MAINTENANCE AND INSPECTION: WARNING: BE SURE TO SWITCH POWER OFF AND DISCONNECT THE PLUG FROM THE RECEPTACLE DURING MAINTENANCE AND INSPECTION. 1. Replacing the depressed center wheel: Replace the depressed center wheel when it has been worn out to about 2-3/8" (60mm) in external diameter. Confirm that there is no crack or any damage to the depressed center wheel. If there is a crack or a transformation in the wheel, replace it immediately. 2. Inspecting the mounting screws: Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loosened, retighten them immediately. WARNING: USING THIS GRINDER WITH LOOSE SCREWS IS EXTREMELY DANGEROUS. 3. Confirm that there is no damage in the wheel guard, the cord and the housing, etc. Furthermore, confirm that there is no abnormality No. of Carbon in the activation of the switch. Wear Limit brush 4. Inspecting the carbon brushes (Fig. 4): The motor employs carbon brushes which are consumable parts. Replace the carbon brush with a new one when it becomes worn to its 0.24" (6mm) wear limit. Always keep carbon brushes clean and ensure that they slide freely within the 0.67" (17mm) brush holders. (Fig. 4) CAUTION: USING THIS GRINDER WITH A CARBON BRUSH WHICH IS WORN IN EXCESS OF THE WEAR LIMIT WILL DAMAGE THE MOTOR. NOTE: Use JOHN DEERE carbon brush No. 21 indicated in Fig. 4. a. Replacing carbon brushes: Remove the brush caps (Fig. 1) with a slotted screwdriver. The carbon brushes can then be easily removed. 4 1/4-Inch Disc Grinder Operator's Manual Maintenance and Inspection SERVICE AND REPAIRS: All quality power tools will eventually require servicing or replacement of parts because of wear from normal use. To assure that only authorized replacement parts will be used, all service and repairs must be performed by a JOHN DEERE AUTHORIZED DEALER, ONLY. WARNING: ACCESSORIES FOR THIS POWER TOOL ARE MENTIONED IN THIS INSTRUCTION MANUAL. THE USE OF ANY OTHER ATTACHMENT OR ACCESSORY CAN BE DANGEROUS AND COULD CAUSE INJURY OR MECHANICAL DAMAGE. STANDARD ACCESSORIES: -Wrench 1 -Side Handle 1 -Depressed center wheel 1 4-1/2" (115 mm) external dia. x 1/4" (6 mm) thickness x 7/8" (22 mm) hole dia. NOTE: Accessories are subject to change without any obligation on the part of JOHN DEERE. 4 1/4-Inch Disc Grinder Operator's Manual Notes Manuel Operateur Introduction Felicitations de l'achat de votre nouveau la cle a outil! Vous pouvez etre assure que votre nouveau la outil a ete construit avec le plus haut niveau de precision et de fiabilite. Chaque composant a ete rigoureusement teste par des techni...
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