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Metabo BH 20 Manual Original página 14

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ENGLISH
ENG
8.7
Tool Change with SDS Chuck
Before fitting, clean tool shank and
apply special grease (accessories
order no. 6.31800)! Use only SDS-plus tools.
Inserting the tool:
Turn the tool while inserting, until it engages. The
tool is automatically locked.
Removing the tool:
Turn tool lock (3) in direction indicated by arrow
(a) and remove the tool (b).
8.8
Tool change with Futuro Plus keyless
chuck (not BH 20, BHE 20)
Use the keyless chuck when non-impact drilling in
metal, wood etc. and driving screws.
Insert tool. Grip the retaining ring (a) firmly and,
with the other hand, turn sleeve (b) towards "GRIP,
ZU", until the mechanical resistance which can be
felt is overcome.
Caution! The chuck is not yet fully tightened! Keep
turning (there is a "clicking" sound while turning),
until further turning is no longer possible - only now
is the tool securely tightened.
With a soft tool shank, retightening may be
required after a short period of operation.
Opening the drill chuck:
Grip the retaining ring (a) firmly and, with the other
hand, turn the sleeve (b) towards "AUF,
RELEASE".
Note: The ratchet sound which can possibly be
heard after opening the drill chuck, is functional
14
and is switched off by a reverse rotation of the
sleeve.
If the chuck is extremely tightened:
Unplug. Hold drill chuck with an open end spanner
at the flats on its head and turn the sleeve (b) hard
towards "AUF, RELEASE".
8.9
Contact mode (KHE 24 Contact)
To enable the contact mode, press button (11).
If required, e.g. for drilling into steel girders or
steel-reinforced concrete walls, the contact mode
can be disabled by pressing the button (11).
The contact mode indicator (10) shows the current
setting:
Green: contact mode enabled.
Red:
machine has switched off because
contact was made with conductive, earthed
material or a live supply cable.
Pull machine back and bit out of the hole
immediately. Have possible damage
properly repaired.
Off: contact mode disabled.
9 Tips and Tricks
Only moderate pressure is required for hammer
drilling and chiselling. Exerting a high force does
not increase performance.
When drilling deep holes, remove the drill bit
periodically from the hole to release the stone
dust.
Drill tiles and other brittle materials without impact.
10 Maintenance
Keyless chuck cleaning:
After prolonged use hold the chuck vertically, with
the opening down, and fully open and close it
several times. The dust collected falls from the
opening. The application of cleaning spray to the
jaws and jaw openings at regular intervals is
recommended.
The vent slots of the machine should be cleaned
from time to time.
11 Trouble Shooting
If the trigger (14) can not be depressed, check to
see that the direction of rotation selector switch
(12) is fully set to the R or L position.
Electronic signal indicator (9) with VTC
electronics (BHE 24, KHE 24, KHE 28)
Rapid flashing - restart protection
When power is restored after a power supply

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