Operation; Maintenance - Makita 4101RH Instruction Manual

OPERATION

Adjust the amount of water flow. Hold the tool firmly. Set
the base plate on the workpiece to be cut without the
wheel making any contact. Then turn the tool on and wait
until the wheel attains full speed. Now simply move the
tool forward over the workpiece surface, keeping it flat
and advancing smoothly until the cutting is completed.
Keep your cutting line straight and your speed of
advance uniform.
CAUTION:
• THIS TOOL SHOULD ONLY BE USED ON HORI-
ZONTAL SURFACES.
• Be sure to move the tool forward in a straight line
and gently. Forcing and exerting excessive pres-
sure or allowing the wheel to bend, pinch or twist in
the cut can cause overheating of the motor and
dangerous kickback of the tool.
• Since excessive cutting may cause overload of the
motor, the depth of cut should not be more than 20
mm (13/16") at a pass. When you wish to cut more
than 20 mm (13/16") deep, make a couple of
passes with progressively deeper settings.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection
or maintenance.
Dressing diamond wheel
If the cutting action of the diamond wheel begins to
diminish, use an old discarded coarse grit bench grinder
wheel or concrete block to dress the diamond wheel. To
do this, tightly secure the bench grinder wheel or con-
crete block and cut in it.
After use
Blow away dust from the inside of the tool by running the
tool at an idle for a while. Brush off accumulation of dust
on the base. Accumulation of dust in the motor or on the
base may cause a malfunction of the tool.
003545
Cleaning covers
1
2
When accumulation of dust on the cover (A) looks exces-
sive, loosen the clamp and remove the cover (A). Wash
off accumulation of dust inside the cover (A) and wipe it.
Then install the cover (A) on the tool so that its side with
"Upside " mark faces upward. Push the cover (A)
toward the motor as far as it will go and secure it by tight-
ening the clamp.
When changing the wheel, clean the cover (B) at the
same time. Loosen the screw securing the cover (B) and
remove the cover (B). Wash off accumulation of dust
inside the cover (B) and wipe it. Then attach the cover (B)
to the tool by tightening the screw. Accumulation of dust
inside the covers may cause a malfunction of the tool.
1
CAUTION:
• When using the tool, be sure to attach the covers
(A) and (B).
Replacing carbon brushes
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.
First, remove the cover (A).
8
003543
1. Clamp
2. Cover (A)
003549
1. Cover (B)
2. Screw
2
001145
1. Limit mark
1