1 Warning Caution: • Pb free solder has a higher melting point that standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use a soldering iron with temperature control and adjust it to 750 ± 20°F (400 ± 10°C). In case of using high temperature solder- ing iron, please be careful not to heat too long.
4 Trial Operation (After Checking Troubleshooting Guide) 4.1. Hammer/Drill Confirm the action when setting the H/D handle to HAMMER mode. Rotation with hammering may work when the drill bit touches something like concrete or hard type of wood block. And confirm the power.
5 Disassembly and Assembly Instructions 5.1. Disassembly Instructions 5.1.1. Remove chuck handle. Take out a chuck cover and others in order. 5.1.2. Remove C-type spring and white felt. 1. Remove C-type spring. 2. Remove a felt with tweezers. *Be careful not to break the felt.
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5.1.3. Remove a clutch handle. 1. Remove snap ring. 2. Separate a clutch handle.
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5.1.4. Remove the housing. 5.1.5. Remove the piston applying power spring. *Be careful not to loose the spring when it is removed.
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5.1.6. Remove a motor rotor assembly. 5.1.7. Take out the other blocks from the housing. • Motor carbon brush assembly/switch assembly/control PCB/Intermediate shaft assembly *Loose all blocks from the housing and then take out them.
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5.1.8. Remove motor lead wires. 5.1.9. Separate each blocks.
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5.1.10. Separate motor carbon brush assembly. • Removal of the carbon brush assembly. Hitch up two springs to the chase of carbon holder with tweezers. 5.1.11. Removal of the gear box block.
8 Exploded View and Replacement Parts List Model No. : EY78A1 Exploded View...
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Model No. : EY78A1 Parts List Ref. Safety Part No. Part Name & Description Q'ty Remarks WEY78A1H3078 HOUSING AB SET 1 (For Europe) WEY78A1H3079 HOUSING AB SET 1 (For OCEANIA) WEY6803L3997 SEAL A WEY6803L3987 SEAL B WEY6813H3117 CHUCK COVER WEY6803K3127...
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Model No. : EY78A1 Parts List Ref. Safety Part No. Part Name & Description Q'ty Remarks WEY6230K9216 TORX TAPPING SCREW 14 K3-20,(5PCS/PK) WEY7880L3417 SHOULDER BELT WEY9HX403 BIT ADAPTOR WEY7840K0208 FERRITE CORE WEY9L40R2788 BATTERY PACK COVER WEY78A1K7019 TOOL CASE WEY78A1K8108 OPERATING INSTRUCTIONS...