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