Maintenance And Service - Bosch C-EXACT 1 Originalbetriebsanleitung

OBJ_BUCH-1401-003.book Page 19 Tuesday, February 24, 2015 11:26 AM
 Do not look directly into the work area illumination –
your sight can be temporarily degraded!
To save energy, only switch the power tool on when using it.
Working Advice
 Disconnect the power supply before making any ad-
justments, changing accessories, or placing the ma-
chine aside. This safety measure prevents accidental
starting of the power tool.
 Apply the power tool to the screw/nut only when it is
switched off. Rotating tool inserts can slip off.
Setting the Torque (see figures C–D)
The tightening torque is dependent on the spring pretension
of the shut-off clutch. The shut-off clutch responds in right as
well as left rotation when the torque setting is reached.
For setting the individual tightening torques, use only the ad-
justment tool 22 provided.
Push the torque selector switch 10 on the power tool com-
pletely back. Insert the adjustment tool 22 into the tool holder
2 and turn it slowly.When a small indentation (adjusting dial
23) is visible in the clutch, insert the adjustment tool 22 into
the indentation and turn it.
Turning in the clockwise direction results in a higher torque, in
the counterclockwise direction, a lower torque.
Remove the adjustment tool 22.
Shut the torque selector switch 10 again to protect the clutch
against contamination.
Note: The required adjustment is dependent on the type of
threaded connection and can be best determined by practical
trials. Check the trial screwings with a torque wrench.
 Set the torque only in the specified performance range,
otherwise the shut-off clutch will no longer respond.
Marking the Torque Setting
To identify individually adjusted tightening torques, the mark-
ing ring 4 an be replaced with a marking ring of another color.
Press off the marking ring 4 with a thin screwdriver blade, a
knife, or similar.
Always use the power tool with a marking ring to insure that
the housing body is sealed from dust and dirt.
LED indicator for screwdriving applications
When the preset torque is reached, the shut off coupling re-
sponds. The LED indicator 6 lights green.
If the preset torque is not reached, the LED indicator 6 lights
red and an acoustical signal sounds. The screwing fastener
must be performed again.
Repeat protection on corded straight screwdrivers with
lever start
When the shut-off coupling responds for a screwing fastener,
the motor shuts off. Switching on again is possible only after
a 0.3 second delay. In this manner, an unintentional re-tight-
ening of an already seated screw is avoided.
Bosch Power Tools
Repeat protection on corded straight screwdrivers with
push start
The power tools are not equipped with restarting protection
and can be switched on directly again following an automatic
shut-off.

Maintenance and Service

Maintenance and Cleaning
 Disconnect the PUC-EXACT power supply unit from
power before performing any cleaning. This prevents
the danger of an electric shock. Switching off the power
supply unit is not sufficient.
Power Tool Lubrication
Lubricants:
Special gearbox grease (225 ml)
Article number 3 605 430 009
Molycote grease
SAE 10/SAE 20 engine oil
Clean the gearbox after the first 150 running hours using a
mild solvent. Follow the solvent manufacturers directions for
use and disposal. Lubricate the gearbox using Bosch gearbox
lube. Repeat the lubrication procedure every 300 hours after
the initial gearbox service.
Oil the moving parts of the shut-off clutch after 100000
screwing operations with a few drops of SAE 10/SAE 20 mo-
tor oil. Lubricate the sliding and rolling parts with Molycote
grease. At this time, inspect the clutch for wear in order to en-
sure that the repeatability and accuracy have not been affect-
ed. Afterwards, the torque of the clutch must be readjusted.
 Have maintenance and repair work performed only by
qualified specialists. In this manner, it can be ensured
that the safety of the power tool is maintained.
An authorized Bosch after-sales service agent will carry out
this work quickly and reliably.
 Observe all applicable environmental regulations when
disposing of old grease and solvents.
Accessories
You can obtain power supply units in the PUC-EXACT series
from your dealer.
Information about the complete quality accessory program
can be found on the Internet at www.bosch-pt.com and
www.boschproductiontools.com or at your dealer.
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. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts order, please always in-
clude the 10-digit article number given on the type plate of
the machine.
English | 19
1 609 92A 136 | (24.2.15)