Panasonic Ey4640 Operating Instructions Manual

- 11  -  
charger and battery pack with a 
cloth, etc., while charging.
 22) Use of an attachment not recom-
mended may result in a risk of fire, 
electric shock, or injury to persons.
 23) Do not short the battery pack. A 
battery short can cause a large cur-
rent flow, over heating and burns.
  24)  NOTE: If the supply cord of this ap-
pliance is damaged, it must only be 
replaced by a repair shop appoint-
ed by the manufacturer, because 
special purpose tools are required.
 25) 
TO REDUCE THE RISK OF...

- 12 -   
 CAUTION:
• When using, the Grinding disc 
guard must be installed on the 
tool so that the closed side of the 
guard always faces toward the op-
erator.
• Ensure that blotters are used 
when they are provided with the 
bonded abrasive product and 
when they are required;
   WARNING:
• Always use supplied guard when 
using tool. Grinding disc can shat-
ter during use and Grinding disc 
guard helps to reduce chances of 
personal injury.
1. Install the Grinding disc guard, and 
then securely...

- 13 -  
To start the tool, press and slide the 
power switch toward the “ON” posi-tion. 
For continuous operation, press the 
front of the power switch to lock it.
To stop the tool, press the rear of the 
power switch, then slide it toward the 
“OFF” position.
  
WARNING:
• It should never be necessary to 
force the tool. The weight of the 
tool applies adequate pressure. 
Forcing and excessive pressure 
could cause dangerous grinding 
disc breakage.
• ALWAYS replace grinding disc if 
tool is dropped...

- 14 - 
Using a cut-off disc guard 
(EY9X213E) (Available as an 
accessory, not included)
Make sure the side.
  
WARNING:
• When using an abrasive cut-off 
disc, be sure to use only the cut-
off disc guard designed for this 
use with cut-off disc.
• NEVER use cut-off disc for grinding.
• Do not jam the Disc or apply ex-
cessive pressure. Do not attempt 
to make an excessive depth of 
cut. Overstressing the cut-off disc 
increases the loading and suscep-
tibility to twisting or binding of the 
cut-off...

- 15 -  
Overheat warning lamp
Off 
(normal 
operation)Flashing: Overheat
Indicates operation 
has been halted due to 
battery overheating.
The overheating protection feature halts 
operation to protect the battery pack 
in the event of overheating. The over-
heat warning lamp on the control panel 
flashes when this feature is active.
• If the overheating protection feature 
activates, allow the tool to cool thor-
oughly (at least 30 minutes). The 
battery is ready for use when the 
over-heat warning...

- 16 - 
Battery Pack Life
The rechargeable batteries have a lim-
ited life. If the operation time becomes 
extremely short after recharging, re-
place the battery pack with a new one.
Battery Recycling
ATTENTION:
FOR Li-ion Battery Pack, EY9L40
A Li-ion battery that is recyclable pow-
ers the product you have purchased. 
Please call 1-800-8-BATTERY for infor-
mation on how to recycle this battery.
[Battery Charger][Battery Charger]
ChargingCharging
Cautions for the Li-ion Battery 
Pack
•  If the...

- 17 -  
5. When charging is completed, the 
charging lamp will start flashing quickly 
in green color.
6. If the temperature of the battery pack 
is 0°C or less, charging takes longer to 
fully charge the battery pack than the 
standard charging time.
Even when the battery is fully charged, 
it will have approximately 50% of the 
power of a fully charged battery at nor-
mal operating temperature.7. If the power lamp does not light im-
mediately after the charger is plugged 
in, or if after the standard...

- 18 - 
LAMP INDICATIONSLAMP INDICATIONS
Green Lit
Charger is plugged into the AC outlet.
Ready to charge.
Green Flashing Quickly
Charging is completed. (Full charge.)
Green Flashing
Battery is approximately 80% charg ed. (Usable charge. Li-
ion only)
Green Lit
Now charging.
Orange Lit
Battery pack is cool.
The battery pack is being charged slowly to reduce the load 
on the battery. (Li-ion only)
Orange Flashing
Battery pack is warm. Charging will begin when temperature 
of battery pack drops.
If the...

- 19 -  
Replacing carbon brushes
Keep the carbon brushes clean and 
free to slip in the holders. When it is 
less than 5 mm (3/16”) shorter both 
carbon brushes should be replaced at 
the same time. Use only identical car-
bon brushes.
Insert the top end of slotted bit screw-
driver into the notch in the tool and re-
move the brush cap cover by lifting it 
up.
1. Brush cap 
cover
2. Brush cap
2
1
Use a screwdriver to remove the caps. 
Take out the worn carbon brushes, in-
sert the new ones and secure...

- 20 - 
VIII. SPECIFICATIONS
MAIN UNIT
Mounting wheel diameter115 mm (4-1/2”)
Mounting wheel innerhole diameter22 mm (7/8”)
Spindle thread sizeM14
Motor voltage14.4 V DC
Rated speed9500 min
-1 (rpm)
Weight (with battery pack)2.2 kg (4.8 lbs)
Overall length361 mm (14-7/32”)
BATTERY PACK
ModelEY9L40
Storage batteryLi-ion Battery
Battery voltage14.4 V DC (3.6 V x 4 cells)
Capacity3 Ah
BATTERY CHARGER
ModelEY0L80
RatingSee the rating plate on the bottom of the charger.
Weight0.95 kg 
(2.1 lbs)
[Li-ion...