Maintenance - Makita BTP140 Instruction Manual

MAINTENANCE

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1. Limit mark
1. Rear cover
2. Screws
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 exceptions are iron and brass
which should be drilled dry.
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 performance 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.
• 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.
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
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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.
Use a screwdriver to remove two screws then remove the rear cover.
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