Unauthorized copying and distribution is a violation of law. EY6506-U1 1 SCHEMATIC DIAGRAM 2 WIRING CONNECTION DIAGRAM 2 EY6506-U1 3 DISASSEMBLY/ASSEMBLY INSTRUCTIONS HOW TO DISASSEMBLE MAIN UNIT. Ref. No. 1A Procedure 1A Removal of the Fixation cover and Housing. 1. Remove four screws tightened with the fixation cover and take it out. 2. Remove eight housing screws. Ref. No. 1B Procedure 1A > >>>> 1B Removal and attachment of the Motor. (Removal) 1. Take out the motor with the driving block from housing. 2. Separate the motor assembly from the driving block. 3. Take out the motor rotor assembly from the motor stator. NOTE : Make sure not to damage the magnet by motor rotor. (Attachment) 1. Insert the motor rotor assembly into the stator. NOTE : Make sure that the motor stator has their own direction for proper assembly. If it is assembled wrongly, the rotation may be the opposite way. 3 Ref. No. 1C Procedure 1A >>>> 1B >>>> 1C Removal of the Driving Block. 1.Removethethrustplate.2.Takeouttheplanetgearsandpinsslightlytappingthedrivingblockonthetable.EY6506-U1 1.Removethethrustplate.2.Takeouttheplanetgearsandpinsslightlytappingthedrivingblockonthetable.EY6506-U1 Ref. No. 1D Procedure 1A > >>>> 1B > >>>> 1C> >>>> 1D Assembly of the Switch. 1. Press fit the lead wires firmly. 4 EY6506-U1 4 TROUBLESHOOTING GUIDE (Refer to WIRING CONNECTION DIAGRAM) < TROUBLE > < CHECK > < REMEDY > Does not operate. NO Replace battery pack. > If no less than 12V DC is available across the (+) and (-) terminals, > the battery pack is OK. NOTE: The battery pack is sold separately as an optional accessory. See the nearest sales dealer for details. The battery pack has a limited life. The pack should be replaced if; -after being charged for the rated charging time the battery voltage is less than 12V DC or the usable time is extremely short. -the battery leaks. Check battery for leaks and terminals for corrosion. vOK > Check for proper terminal contacts. vOK NO Contacts in switch block (See WIRING CONNECTION DIAGRAM.) > are defective. Check continuity between following terminals. Replace switch & FET * Inspection of the forward / reverse selection switch. block. When switch handle is depressed all the way: -There should be 0. between (A) -(D) , and between (B) -(C) ; when switch lever is set to forward side. -There should be 0. between (A) -(C) , and between (B) -(D) ; when switch lever is set to reverse side. * Inspection of the brake. When switch handle is not depressed: -There should be 0. between (A) -(B) . vOK NO Replace motor A. Check the condition of carbon brush. > brush assembly. (Do not touch between brush holder and holding spring.) B. There should be 0. between motor lead wire and terminal of brush holder. vOK NO Replace motor Check the condition of rotor if there is any wear, crack and deformation. > rotor assembly. vOK NO Replace motor Check the condition of motor case if there is any crack and deformation. > stator. 5 EY6506-U1 < TROUBLE > Does not speed-control. > < CHECK > Even if FET block is defective, it can not be replaced individually. Replace whole switch block. Remove the FET circuit block and check the lead wire terminals. These terminals are open normally when there is an open circuit ( .) between the green and yellow lead wires, and between the blue and yellow lead wires. NOTE: * FET is weak against static electricity. ** The resistance value may be some differences depends on the measurement range. NO > < REMEDY > Repair the contact or replace switch & FET block. Does not vibrate or weakness of vibration. > Check wear condition of anvil. If no less than 1mm from the corner at (A) side or 0.5mm from the corner at (B) side, anvil is OK. NO > Replace anvil. 6 EY6506-U1 5 EXPLODED VIEW 7 EY6506-U1 6 REPLACEMENT PARTS LIST NOTE: *B=only available as set *C=available individually Ref.No. Part No. Part Name & Description Remarks Per Unit 1 WEY6506K3078 HOUSING AB SET 1 2 EY6481L0177 CLICK SPRING 1 3 WEY6506H4057 FIXATION COVER ASSEMBLY 1 4 WEY6504L0987 O-RING 47 1 5 WEY7300K1167 C-TYPE RING 1 6 WEY6605L0857 THRUST PLATE 1 7 WEY6605L0197 BIT HOLDER SPRING 1 8 WEY6404K3717 BIT HOLDER 1 9 WEY6506H3747 FIXATION COVER 1 10 WEY6505L0867 SLIDER 1 11 EY6225L6977 STEEL BALL 3.5 1 12 WEY6506L1127 ANVIL 1 13 WEY574B6967 STEEL BALL *B (2PCS/PK) 2 14 WEY6506L1377 HAMMER 1 15 WEY7300L6957 STEEL BALL *B (27PCS/PK) 27 16 WEY6506L0877 THRUST PLATE 1 17 WEY6506L0157 HAMMER SPRING 1 18 WEY6506L1147 SPRING FIXING PLATE 1 19 WEY6506L0317 DUST PREVENT RUBBER 1 20 WEY6506L0847 THRUST PLATE 1 21 WEY6506L1137 DRIVING SHAFT 1 22 WEY6506L1357 PLANET GEAR *B (2PCS/PK) 2 23 WEY6506L1347 PIN *B (2PCS/PK) 2 24 WEY6506L0837 THRUST PLATE 1 25 WEY6506L1067 DRIVING BLOCK 1 26 WEY6506L1457 RING GEAR 1 27 WEY6606L4957 BEARING 1 28 ...
