Maintenance - Makita 4190D Instruction Manual

Operation (Fig. 14)
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.
Feed water to the wheel by adjusting the water cock to
obtain a gentle flow of water. 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.
For fine, clean cuts, cut slowly. (When cutting glass plate
5 mm thick, cut at about 250 mm/min. When cutting tile
10 mm thick, cut at about 300 mm/min.) Also slow down
as you complete a cut to avoid breaking or cracking the
workpiece being cut.
CAUTION:
• Be sure to hold the workpiece firmly down on a stable
bench or table during operation.
• Do not twist or force the tool in the cut, or the motor
may be overloaded or the workpiece may break.
• Do not use the tool with the wheel in an upward or side-
ways position.
• When cutting glass plate, it is recommended to attach a
rubber plate (optional accessory) on the base of the
tool to prevent the workpiece surface from being
scratched.
• The wheel for Model 4190D/DB is a wet-type wheel for
glass and tile applications. Be sure to feed water to the
wheel during operation.
• If the cutting action of the wheel begins to diminish,
dress the cutting edge of the wheel using an old dis-
carded coarse grit bench grinder wheel or concrete
block. Dress by pressing lightly on the outer edge of the
wheel.
Cutting performance
The following reference table indicates the approximate
cutting capacity from a single battery charge.
Workpiece Thickness
3 mm
Glass
5 mm
5 mm
Ceramic tile
10 mm
CAUTION:
If the tool is operated continuously until the battery car-
tridge has discharged, allow the tool to rest for
15 minutes before proceeding with a fresh battery.
6
Cutting length (90°)
4190D 4190DB
5 m 8 m
2 m 3 m
4 m 6 m
3.5 m 5.5 m

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and the bat-
tery cartridge is removed before carrying out any work on
the tool.
After use
Brush off accumulation of dust on the base.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.