Maintenance; Operating Instructions - Makita VR250D Instruction Manual

7. Do not allow pieces of metal, water or other
foreign objects to get into the charger port
where the charging terminals are located.
8. Do not carry the tool with finger on switch.
9. Do not set the tool down and switch it on. The
vibrating head may whip around out of con-
trol and cause an accident.
10. Be careful not to allow water, wet concrete or
the like to get into the tool. Do not let the tool
fall into wet concrete.
11. Insert the vibrating head carefully between
iron/steel frames or reinforcing rods not to
come in contact with them.
12. Do not crush or twist the flexible hose.
13. Do not overly bend the flexible hose.
14. Use a wet cloth or the like to carefully wipe
off any wet concrete left on the tool after use.
Extra care should be given to thorough clean-
ing of the vents, switch area, cover openings,
etc.
SAVE THESE INSTRUCTIONS.

OPERATING INSTRUCTIONS

Installing or removing battery cartridge (Fig. 1)
• Always switch off the tool before insertion or
removal of the battery cartridge.
• To remove the battery cartridge, open the cover and
withdraw the battery cartridge from the tool while
pressing the buttons on both sides of the cartridge.
• To insert the battery cartridge, align the tongue on
the battery cartridge with the groove in the housing
and slip it into place. Always insert it all the way
until it locks in place with a little click. If not, it may
accidentally fall out of the tool, causing injury to you
or someone around you.
• Do not use force when inserting the battery car-
tridge. If the cartridge does not slide in easily, it is
not being inserted correctly.
Switch action (Fig. 2)
CAUTION:
Before inserting the battery cartridge into the tool,
always check to see that the switch trigger actuates
properly and returns to the "OFF" position when
released.
To start the tool, simply pull the trigger. Release the
trigger to stop.
Operation (Fig. 3)
Hold the tool straight when inserting/operating. Use
the tool within the effective vibration range at equidis-
tant intervals. The effective air bubble removal range
is about ten times the diameter of the vibrating head,
or around 250 mm with this tool.
Do not use this tool to move concrete within a form.
The mortar will just move away and the coarse aggre-
gate will remain, causing segregation.
6
Effective leveling and removal of air bubbles
Removal of the air bubbles is complete after you have
worked the tool throughout each effective range, the
concrete stops shrinking, and the mortar has risen
evenly to the surface, giving off a light appearance.
Gently remove the operating tool not to leave holes.
NOTE:
• Vibrating too long in a single place causes concrete
segregation.
• When the coarse aggregate segregates when plac-
ing concrete, shovel out the coarse aggregate and
put it where there is plenty of mortar. Then use the
tool on it. Don't leave coarse aggregate in the seg-
regated condition.
When concreting a slope site, always pour from the
bottom at the beginning. This way the weight of the
freshly poured concrete and vibration will lead to
effective removal of air bubbles. (Fig. 4)
Conversely, if the pouring is done first from above,
the mortar will separate and eventually slide to the
bottom.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and the
battery cartridge is removed before carrying out any
work on the tool.
To maintain product safety and reliability, repairs,
maintenance or adjustment should be carried out by
a Makita Authorized Service Center.
ACCESSORIES
CAUTION:
• These accessories or attachments are recom-
mended 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 per-
sons. 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 cen-
ter.
• Various type of Makita genuine batteries and charg-
ers