Operation; Maintenance - Makita DGD800 Instruction Manual

Indication lamp with multi function
► Fig.5: 1. Indication lamp
Indication lamps are located in two positions.
When the battery cartridge is inserted on the tool with
the slide switch positioned in the "O (OFF)" position, the
indication lamp flickers quickly for approximately one
second. If it does not flicker so, the battery cartridge or
indication lamp has broken.
— Overload protection
— When the tool is overloaded, the indication
lamp lights up. When the load on the tool is
reduced, the lamp goes out.
— If the tool continues to be overloaded and
the indication lamp continues to light up for
approximately two seconds, the tool stops.
This prevents the motor and its related parts
from being damaged.
— In this case, to start the tool again, move the
slide switch to the "O (OFF)" position once
and then to the "I (ON)" position.
— Battery cartridge replacing signal
— When the remaining battery capacity gets
small, the indicator lamp lights up during
operation earlier than enough capacity bat-
tery use.
— Accidental re-start preventive function
— Even if the battery cartridge is inserted on
the tool with the slide switch in the "I (ON)"
position, the tool does not start. At this time,
the lamp flickers slowly and this shows that
the accidental re-start preventive function is
at work.
— To start the tool, first slide the slide switch
toward the "O (OFF)" position and then slide
it toward the "I (ON)" position.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
the battery cartridge is removed before carrying
out any work on the tool.
Installing or removing wheel point
► Fig.6: 1. Wrench 13 2. Wheel point 3. Collet nut
4. Wrench 13
Loosen the collet nut and insert the wheel point into the
collet nut. Use one wrench to hold the spindle and the
other one to tighten the collet nut securely.
The wheel point should not be mounted more than 10
mm from the collet nut. Exceeding this distance could
cause vibration or a broken shaft.
► Fig.7
To remove the wheel point, follow the installation proce-
dure in reverse.
CAUTION:
• Use the correct size collet cone for the wheel
point which you intend to use.

OPERATION

► Fig.8
Turn the tool on without the wheel point making any
contact with the workpiece and wait until the wheel point
attains full speed. Then apply the wheel point to the
workpiece gently. To obtain a good finish, move the tool
in the leftward direction slowly.
CAUTION:
• Apply light pressure on the tool. Excessive
pressure on the tool will only cause a poor finish
and overloading of the motor.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
the battery cartridge is removed before attempt-
ing to perform inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
Replacing carbon brushes
► Fig.9: 1. Limit mark
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
► Fig.10: 1. Holder cap cover 2. Screwdriver
Insert the top end of slotted bit screwdriver into the
notch in the tool and remove the holder cap cover by
lifting it up.
► Fig.11: 1. Brush holder cap 2. Screwdriver
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
Reinstall the holder cap cover on the tool.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
8 ENGLISH