Tips And Tricks; Troubleshooting - Metabo KHE 76 Original Instructions Manual

ENGLISH
ENG
The additional handle (1) can also be attached to
the gear housing. Unscrew the additional handle
from the handle holder (2), insert in one of the
threads (6) (on the left and right of the gear
housing) by hand and tighten.
8 Use
8.1 Attaching and removing tools
Before fitting tools, clean shank and apply
special grease enclosed with tool (acces-
sories order no. 6.31800)! Use only SDS-max
tools.
Attaching tools:
Turn tool and insert until it engages. The tool is
automatically locked.
Pull on the tool to check that it is seated
correctly. (It must be possible to move the
tool a few centimetres in an axial direction.)
Removing the tool:
Pull tool lock (4) backwards in direction indicated
by arrow (a) and remove tool (b).
8.2 Setting the operating mode
Turn the switch button (5) to select the desired
operating mode.
Hammer drilling
Chiselling
When a chisel is fitted, only operate
the machine in the chiselling operating
mode .
8.3 Adjusting the chisel position
The chisel can be secured in 12 different positions.
- Insert the chisel.
- Turn the switch button (5) to position
- Turn the chisel to the required position.
- Turn the switch button (5) to position
- Turn the chisel until it engages.
When a chisel is fitted, only operate
the machine in the chiselling operating
mode.
8.4 Adjusting the impact force
Slide the switch (12) to adjust the impact force
(and speed) setting.
Reduced impact force,
reduced speed
High impact force,
high speed
12
The correct setting depends on the task in hand.
Example: set the switch to "reduced impact force"
when working on soft, brittle material or trying to
minimise break-off.
Set the switch to "high impact force" when
working on harder materials.
8.5 Switching On and Off
Torque setting:
To start the machine, press the trigger switch (9).
Release the trigger (9) to switch off.
Continuous operation:
For continuous operation, the trigger switch (9) can
be locked using the lock button (8).
Press and release the trigger (9) again to switch off.
In continuous operation, the machine
continues running if it is forced out of your
hands. Therefore, always hold the machine
with both hands using the handles provided,
stand in a safe position and concentrate.
8.6 Metabo VibraTech (MVT)
For reduced vibrations and less stress on the
hands.
Always apply a moderate amount of pressure to
the handle when pushing down the machine and
do not force. Vibrations are reduced most effec-
tively at the central position (7).
9 Cleaning, Maintenance
Motor cleaning: blow out the machine thoroughly
at regular intervals through the air slots with
compressed air.

10 Tips and Tricks

Only moderate pressure is required when working
.
with the machine. Applying excessive pressure
does not increase your working performance and
.
may decrease the service life of your machine.
In the case of deep bores, pull the drill bit out of the
bore from time to time in order to remove the stone
dust.

11 Troubleshooting

Carbon brush service indicator (10) lights up:
the carbon brushes are almost completely worn
(remaining operating time approx. 30 hours). If the
brushes are completely worn, the machine
switches off automatically. Have an authorised
service centre replace the brushes.