Maintenance - Makita BTP141RFJ Instruction Manual

Hammer drill mode "
CAUTION:
• Always hold the tool firmly during operation. There is a
tremendous and sudden twisting force exerted on the
tool/bit at the time of hole break-through, when the hole
becomes clogged with chips and particles, or when
striking reinforcing rods embedded in the concrete.
Be sure to use a tungsten-carbide tipped bit.
Position the bit at the desired location for the hole, then
pull the switch trigger. Do not force the tool. Light pres-
sure gives best results. Keep the tool in position and pre-
vent it from slipping away from the hole.
Do not apply more pressure when the hole becomes
clogged with chips or particles. Instead, run the tool at an
idle, then remove the bit partially from the hole. By
repeating this several times, the hole will be cleaned out
and normal drilling may be resumed.
"
Drilling mode "
CAUTION:
• Pressing excessively on the tool will not speed up the
drilling. In fact, this excessive pressure will only serve
to damage the tip of your bit, decrease the tool perfor-
mance and shorten the service life of the tool.
• There is a tremendous force exerted on the tool/bit at
the time of hole break through. Hold the tool firmly and
exert care when the bit begins to break through the
workpiece.
• A stuck bit can be removed simply by setting the
reversing switch to reverse rotation in order to back
out. However, the tool may back out abruptly if you do
not hold it firmly.
• Always secure small workpieces in a vise or similar
hold-down device.
• Do not pull the switch trigger repeatedly when the
motor is locked. It may damage the tool.
For drilling in wood, the best results are obtained with
wood drills equipped with a guide screw. The guide
screw makes drilling easier by pulling the bit into the
workpiece.
For drilling in metal, to prevent the bit from slipping when
starting a hole, make an indentation with a center-punch
and hammer at the point to be drilled. Place the point of
the bit in the indentation and start drilling.
Use a cutting lubricant when drilling metals. The excep-
tions are iron and brass which should be drilled dry.
Screwdriver mode " "
CAUTION:
• Adjust the number on the LED display to the proper
torque level for your work.
• Make sure that the driver bit is inserted straight in the
screw head, or the screw and/or bit may be damaged.
• Hold the tool firmly. When the clutch cuts in or refasten-
ing, a sudden twisting force may occur and it can twist
your wrist.
Place the point of the driver bit in the screw head and
apply pressure to the tool. Start the tool slowly and then
increase the speed gradually.
10
"
NOTE:
• This tool employs an electronic clutch. The tool stops
automatically when the clutch cuts in. To keep operat-
ing, release the switch trigger once.
• When driving wood screws, predrill pilot holes to make
driving easier and to prevent splitting of the workpiece.
See the chart.
Nominal diameter of wood
screw (mm)
3.1
3.5
3.8
4.5
4.8
5.1
5.5
5.8
6.1
NOTE:
• See the following chart for the relation between the
number of torque setting and fastening torque rate.
The fastening torque rate will be different depends on
materials. Make a test fastening to get the desired
torque before operation.
Number Fastening torque rate
on LED
Low (1)
Display
Approx. 2.5 N•m
1
(Approx. 25.5 kgf. cm)
Approx. 4.6 N•m
3
(Approx. 46.9 kgf. cm)
Approx. 8.1 N•m
5
(Approx. 82.6 kgf. cm)
Approx. 10.0 N•m
7 (Approx. 102.0 kgf.
cm)
Approx. 11.5 N•m
9
(Approx. 117.3 kgf. cm)

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before attempting to perform
inspection or maintenance except for the following trou-
bleshooting related to the light.
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
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.
Recommended size of
pilot hole (mm)
2.0 – 2.2
2.2 – 2.5
2.5 – 2.8
2.9 – 3.2
3.1 – 3.4
3.3 – 3.6
3.7 – 3.9
4.0 – 4.2
4.2 – 4.4
High (2)
Approx. 1.1 N•m
(Approx. 11.2 kgf. cm)
Approx. 2.0 N•m
(Approx. 20.4 kgf. cm)
Approx. 3.0 N•m
(Approx. 30.6 kgf. cm)
Approx. 4.0 N•m
(Approx. 40.8 kgf. cm)
Approx. 5.8 N•m
(Approx. 59.1 kgf. cm)