Panasonic EY4640 User manual

© Panasonic Electric Works Co., Ltd. 2008.
All rights reserved. Unauthorized copying and distri-
bution is a violation of law.
Order Number PTD0810X49CE
Cordless Angle Grinder
Model No. EY4640
Europe
Oceania
TABLE OF CONTENTS
PAGE PAGE
1 Warning -------------------------------------------------------------- 2
2 Specifications ----------------------------------------------------- 2
3 Troubleshooting Guide ----------------------------------------- 3
4 Disassembly and Assembly Instructions ---------------- 5
5 Wiring Connection Diagram ---------------------------------- 9
6 Schematic Diagram ---------------------------------------------- 9
7 Exploded View and Replacement Parts List -----------10

2
1Warning
Caution:
• Pb free solder has a higher melting point that standard solder; Typicall 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.
• Pb free solder will tend to splash when heated too high (about 1100°F / 600°C).
2 Specifications

3
3 Troubleshooting Guide
(Refer to Wiring Connection Diagram)

4
3.1. Trial Operation (after checking Troubleshooting Guide.)

5
4 Disassembly and Assembly Instructions
Ref. No. 1A Procedure 1A Removal of disc.
WARNING:
To reduce the risk of injury, always remove battery pack before
removing/installing the disc.
1. Push the spindle lock button to secure the spindle in place, and then
use the clamp nut wrench to loosen the clamp nut.
2. Remove the disc from the spindle and the disc flange.
3. Loosen the screw and remove the grinding disc guard.
Ref. No. 1B Procedure 1A →1B Removal of driving block.
1. Loosen 4 screws and remove the disc cover.
2. Loosen a screw and remove the grinding disc guard.
3. Loosen 3 screws to remove the gear case assembly from the gear
case cover assembly.

6
Ref. No. 1C Procedure 1A →1B →1C Removal of housing.
1. Loosen 5 housing screws.
2. Hold the housing A and take the housing B up vertically.
Ref. No. 1D Procedure 1A →1B →1C →1D Removal of switch handle.
1. Slide the switch handle until the hook of switch handle comes to the
wider hole area of switch lever.
2. Pull the switch handle up.

7
Ref. No. 1E Procedure 1A →1B →1C →1D →1E Removal of motor assembly.
1. Hold the pinion gear with vice putting a cloth between the unit and
vice.
2. Loosen the hex nut by a wrench.
3. Take out the rotor assembly from the stator.
CHECK POINT
•Statorassembly
A: Check if there is no breakage of magnet and no metallic powder stuck
around.
• Rotor assembly
B: Check if the commutator is worn out.
C: Check if the coil changes the color (burn).
Ref. No. 1F Procedure 1A →1B →1C →1D →1E →1F Removal of the brush assembly.
1. Remove the brush cap cover.
2. Take out the brush assembly.
3. Pull out the lead wires by holding the quick connection terminal from
the switch.

8
Ref. No. 1G Procedure 1A →1B →1C →1D →1E →1F
→1G
Assembly of main unit.
1. Press fit the lead wire firmly.
2. Close the housing A and B.

9
5 Wiring Connection Diagram
6 Schematic Diagram

Model No. : EY4640 Exploded View
7 Exploded View and Replacement Parts List

Model No. : EY4640 Parts List
Safety
Ref.
No. Part No. Part Name & Description Q'ty Remarks
1 WEY4640K3079 HOUSING AB SET 1 (for EUROPE)
1 WEY4640K3070 HOUSING AB SET 1 (for OCEANIA)
2 WEY4640L1587 STATOR ASSEMBLY 1
3 WEY4640L1007 ROTOR ASSEMBLY 1
4 WEY4640L1457 PINION GEAR 1
5 WEY4640L6427 HEX NUT 1 (M6), (5PCS/PK)
6 WEY4640L1038 BRUSH HOLDER 1
7 WEY4640K2007 SWITCH ASSEMBLY 1
8 WEY4640L2127 MAIN PCB ASSEMBLY 1
9 WEY4640L2107 TERMINAL PCB ASSEMBLY 1
10 WEY4640L2137 LED PCB ASSEMBLY 1
11 WEY4640L2017 SWITCH HANDLE 1
12 WEY4640L2917 SWITCH LEVER 1
13 WEY4640L3588 INDICATION PANEL 1
14 WEYT510L2317 BRUSH ASSEMBLY 2 (2PCS/PK)
15 WEY4640L3117 BRUSH CAP 2 (2PCS/PK)
16 WEY4640K3107 BRUSH CAP COVER 2 (2PCS/PK)
17 WEY4640L4127 GEAR CASE ASSEMBLY 1
18 WEY4640L4098 GEAR CASE COVER ASSEMBLY 1
19 WEY4640L9447 TIGHT SCREW 4 (5PCS/PK)
20 WEYT510L9447 TIGHT SCREW 9 (5PCS/PK)
21 WEY4640L6257 TIGHT SCREW 1 (M5*18)
22 WEY4640L0208 FERRITE CORE 1
23 WEY4640S7868 DISC WRENCH 1
24 WEY4640K3237 SUPPORT HANDLE 1
25 WEY4640L8917 GREASE 1
26 WEY4640K1188 GRINDING DISC GUARD 1
27 WEY4640K1168 DISC FLANGE 1
28 WEY4640K1178 CLAMP NUT 1
29 WEY4640K1198 CUT-OFF DISC GUARD 1
30 WEY9L40R2788 BATTERY PACK COVER 1
- WEY9639K7018 TOOL CASE 1 <SH>
- WEY4640K8109 OPERATING INSTRUCTIONS 1 <SH>