Maintenance And Service - Bosch GBH 18V-26 Professional Manual Original

Changing the chiselling position (Vario-Lock)
You can lock the chisel in 36 different positions, so you can
select the optimum working position for each task.
– Insert the chisel into the tool holder.
– Turn the impact/mode selector switch (16) to the "Vario-
Lock" position.
– Turn the application tool to the required chisel position.
– Turn the impact/mode selector switch (16) to the "chis-
elling" position. With this, the tool holder is locked.
– Set the rotational direction for chiselling to clockwise.
Practical Advice
Setting the drilling depth (see figure L)
You can use the depth stop (20) to set the required drilling
depth X.
– Press the button for depth stop adjustment (18) and in-
sert the depth stop into the auxiliary handle (19).
The fluting on the depth stop (20) must face downwards.
– Insert the SDS-plus application tool into the SDS-plus tool
holder (3) to the stop. Otherwise, the movability of the
SDS-plus drilling tool can lead to incorrect adjustment of
the drilling depth.
– Pull the depth stop far enough out that the distance
between the drill bit tip and the edge of the depth stop
corresponds to the required drilling depth X.
Overload clutch
If the application tool jams or snags, the power trans-
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mission to the drill spindle will be interrupted. Always
hold the power tool firmly with both hands to with-
stand the forces this may create and adopt a position
with stable footing.
Switch the power tool off immediately and remove the
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application tool if the power tool becomes blocked.
Switching on when the drilling tool is blocked may
cause high torque reactions.
Rapid shut-off (KickBack Control)
The rapid shut-off function (KickBack Control)
gives the user greater control over the power
tool and offers them better protection than
power tools that do not have Kickback Control.
The power tool will switch off if it suddenly and
unforeseeably rotates around the drilling axis.
– To switch the tool back on, release the on/off switch
(13) and then press it again.
Rapid shut-off is indicated by flashing of the worklight (17)
on the power tool.
Electronic Precision Control (EPC)
EPC assists you when working with impact in sensitive ma-
terials by ensuring slow start-up and reduced operating
speed.
Slide the EPC switch (8) to the required position.
Bosch Power Tools
Position for maximum operating speed
Position for slow start-up and reduced operat-
ing speed
Vibration damping
The integrated vibration damping function re-
duces the generated vibration.
Do not continue to use the power tool if the damping
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element is damaged.
Inserting screwdriver bits (see figure M)
Only apply the power tool to the screw/nut when the
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tool is switched off. Rotating tool inserts can slip off.
A universal holder (29) with SDS-plus shank (accessory) is
required to work with screwdriver bits.
– Clean and lightly grease the insertion end of the shank.
– Insert the universal holder into the tool holder while turn-
ing it until it locks automatically.
– Check that it is locked by pulling the universal holder.
– Insert a screwdriver bit in the universal holder. Only use
screwdriver bits that fit the screw head.
– To remove the universal holder, slide the locking sleeve
(5) backwards and remove the universal holder (29)
from the tool holder.

Maintenance and Service

Maintenance and Cleaning
Remove the battery from the power tool before carry-
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ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
To ensure safe and efficient operation, always keep
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the power tool and the ventilation slots clean.
Replace a damaged dust protection cap immediately.
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It is recommended that you have use an after-sales
service for this.
– Clean the tool holder (3) after each use.
After-Sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
In all correspondence and spare parts orders, please always
include the 10‑digit article number given on the nameplate
of the product.
English | 23
1 609 92A 6GA | (10.02.2022)