Weka SR 25 Notice D'utilisation page 21

5.6 Gear change
The SR38/68/75 have a 3-speed gear.
Never use force to change the gear and only change it when the machine is decelerating or has stopped.
Always select the appropriate speed for the drill diameter (see table and rating plate on the machine).
5.7 Safety clutch
The integrated friction clutch protects the operator, the machine and the tool against high mechanical
overloads. On proper use you should realize the releasing of the clutch hardly.
5.8 Drilling
Set the volume of water at the ball valve (1a) concerning the above mentioned table. Thereby take care
that the carried off material is completely flushed out of the drill hole.
If mud forms round the drill hole, this points to the use of too less water.
Use force as required. If you do not, the diamonds will tend to "polish". In this case the rate of advance
will fall constantly until it finally stops.
In this case the segments can only be "sharpened" again by means of a SiC-grindstone.
Is the torque too low, change to the next lower gear.
Take care that the drill bit and therefore the drill rig do not vibrate, otherwise the diamonds are detached
by force and drill rig and machine wear out hugely.
When drilling through reinforcements, you might have to use greater initial pressure and if required
change to the next lower gear.
If the drill blocks, do not try to loosen it by switching the machine on and off. Switch the machine off
immediately and loosen the drill bit by turning right and left using a suitable wrench. Carefully remove
the machine from the borehole.
Take care not to cut a water-pipe or even an electric mains. In case of doubt use a line detector
for searching the drilling area.
6. M A I N T E N A N C E
ATTENTION: Before beginning maintenance or repair remove the mains plug from the
supply socket.
Clean the machine once the drilling work has been completed. Also clean and grease the drill bit-holding
thread.
Clean the machine with a dry or moist cleaning-rag and not with a jet of water.
Take care that especially casing, cord enterings and ON-OFF switch are not damaged,
resp. put the SR25/35/65/75 immediately out of operation if these parts are damaged, as
water can enter the machine and thus a considerable risk of electrical shock exists for the
operator. Further more it is probable that the large-scale electronic gets damaged
unrepairably.
In the SR-machine an operating hour counter is integrated which is set to 250 hours. After
reaching this operating time, the start button has to be pressed three times for starting the motor.
Now bring the machine to a WEKA service station for inspection, so that the machine can be
maintenanced and the counter can be set back. Do not work longer than 20 hours now in your
own interest, as you may loose any warranty claims.
Damaged cords and plugs have to be repaired or exchanged exclusively in an authorized repair station
(www.weka-elektrowerkzeuge.de).
6.1 Oil bath gear
The SR-machine possesses as all WEKA machines an oil bath gear. Through the special efficient
lubrication, a high duration of life can be reached. Especially take care foe leakages.
If you should realize that oil escapes, stop the machine immediately and send it for a check to one of
our repair stations or directly to us. You can find the addresses on our homepage.
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