Maintenance; Replacing Carbon Brushes - Makita BDF441 Instruction Manual

• 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.
• If the tool is operated continuously until the battery
cartridge has discharged, allow the tool to rest for
15 minutes before proceeding with a fresh battery.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before attempting to
perform inspection or maintenance.

Replacing carbon brushes

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. 13)
Use a screwdriver to remove two screws then remove the
rear cover. (Fig. 14)
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screwdriver
of slender shaft or the like. (Fig. 15)
Use pliers to remove the carbonbrush caps of the carbon
brushes. Take out the worn carbon brushes, insert the
new ones and replace the carbonbrush caps in reverse.
(Fig. 16)
Make sure that the carbonbrush caps have fit into the
holes in brush holders securely. (Fig. 17)
Reinstall the rear cover and tighten two screws securely.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.
ACCESSORIES
CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita service center.
• Drill bits
• Screw bits
• Hook
• Grip assembly
• Various type of Makita genuine batteries and chargers
• Rubber pad assembly
• Wool bonnet
• Foam polishing pad
8
For Model BDF441
Noise
The typical A-weighted noise level determined according
to EN60745:
Sound pressure level (L
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 80 dB (A).
Wear ear protection.
Vibration
The vibration total value (tri-axial vector sum) determined
according to EN60745:
Work mode: drilling into metal
Vibration emission (a
Uncertainty (K): 1.5 m/s
For Model BDF451
Noise
The typical A-weighted noise level determined according
to EN60745:
Sound pressure level (L
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 80 dB (A).
Wear ear protection.
Vibration
The vibration total value (tri-axial vector sum) determined
according to EN60745:
Work mode: drilling into metal
Vibration emission (a
Uncertainty (K): 1.5 m/s
EC Declaration of Conformity
We Makita Corporation as the responsible
manufacturer declare that the following Makita
machine(s):
Designation of Machine: Cordless Driver Drill
Model No./ Type: BDF441, BDF451
are of series production and
Conforms to the following European Directives:
98/37/EC until 28th December 2009 and then with
2006/42/EC from 29th December 2009
And are manufactured in accordance with the following
standards or standardised documents:
EN60745
The technical documentation is kept by our authorised
representative in Europe who is:
Makita International Europe Ltd.,
Michigan, Drive, Tongwell,
Milton Keynes, MK15 8JD, England
30th January 2009
Tomoyasu Kato
Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi, JAPAN
): 70 dB (A) or less
pA
2
): 2.5 m/s or less
h,D
2
): 72 dB (A)
pA
2
): 2.5 m/s or less
h,D
2
ENH101-12
Director
ENG103-4
ENG202-3
ENG104-2
ENG202-3