Work Instructions; Maintenance And Service - Narex EVP 13 G-2H3 Original Operating Manual

English
Clamping of drill bits
Chuck with ring gear
Open the chuck to allow mounting of the tool. Mount the tool on.
Mount the tool on and, using the chuck hook (13) clamp in evenly.
Quick-tightening chuck
Open the chuck to allow mounting of the tool. Mount the tool on.
Tighten the quick-tightening chuck by your hand so strongly that
a "click" sound is heard clearly. Thus the chuck will be secured au-
tomatically.
This lock will release again if you turn the sleeve contra direction-
ally to remove the tool.
Be careful as the chuck gets hot:
In case of longer work tasks, especially in impact drill-
ing, the chick might get very hot. In this case you are
recommended to wear protective gloves.
Switching on and off
By pressing the switch button (7) the machine activates and releas-
ing the button stops it.
Permanent run
By pressing the switch button (7) to the stop and simultaneous
pressing the latching pin (6) permanent run is achieved.
Repeated pressing the switch button (7) and its release the perma-
nent run is discontinued.
Speed control
By light and gradual pressing the controller button (7) you will
achieve low speed and controlled continuous run-up.
By further gradual pressing the button the speed increases to the
pre-selected speed.
Electronic speed pre-selection
Using the pre-selection wheel (8) the required pre-selected speed
is set–even if the machine runs. The necessary speed depends
on the type of the material drilled, and a practical test is recom-
mended to verify it.
If the machine is loaded considerably, adjust the pre-selection
wheel (8) to the marginal position in the + direction (max speed
– control disconnected).
After a longer work at low speed leave the machine run idle
for 3 minutes at maximum speed to cool the engine down.
Gear shifting
Use the speed lever (10) to adjust the 2nd speed gear:
1st Speed – lower speed gear – higher torque
2nd Speed – higher speed gear – lower torque
In any speed gear you can adjust the final speed by means of the
electronic pre-selection. However, firstly select the mechanical
speed gear.
Changing the gears can be done at slowing the machine down or
in idle run but never when the machine is fully loaded. Once the
gear is changed, leave the machine start up slowly
Change in rotation
Adjust the rotation direction switch (9) to the right (left run) or to
the left (right run). The left run allows e.g. cutting the threads and
unscrewing of bolts or nuts.
Changing is blocked if the controller button is pressed. The rotation
direction has to be changed when the machine is idle.
WARNING! If the left run is used, the chuck has to be
screwed on very firmly.
16
Drilling and impact drilling
Use the impact lever (4) to gear the impact up or down. The shift-
ing can be done even when the machine runs.
Drilling
Shift the gear lever (4) to the left towards the drill-bit
symbol.
Impact drilling
Shift the gear lever (4) to the right towards the ham-
mer symbol.
The impact drilling is recommended to be used in concrete, brick-
work and earthenware. The switch lever (9) must be always shifted
to the right run.
Removing the chuck with ring gear (Fig.)
Hold the spindle on the surface (2) using an open wrench (13 mm).
Insert the chuck hook (13) into a single opening on the chuck and
by turning left screw the chuck out. Release the firmly clamped
chuck by impacts of the hammer on the chuck hook (13).
Removing the quick-tightening chuck (Fig.)
Clamp the hexagonal wrench (15) into the chuck. Hold the spindle
on the surface (2) using a spanner (13 mm). By turning the chuck
to the left using the hexagonal wrench screw the chuck together.
Release the firmly clamped chuck by impacts of the hammer on
the hexagonal wrench.
Proceed in reverse sequence to screw the chuck on.

Work instructions

Drill bits
For steel use perfect and sharpened drill bits made of good-quality
high-speed steel.
Drilling stands
For precise drilling on smaller parts, use of a drilling stand is rec-
ommended.
Clamping device
Clamp the worked pieces properly into the screw-type clamping
unit. Thus turning of the piece is avoided, as well as a potential ac-
cident.
Drilling in tiles
Shift the impact gear lever (4) to the drill-bit symbol. Once the up-
per layer is drilled through, shift the impact gear lever to the ham-
mer symbol.
Thread cutting
Clamp the screw tap properly in the chuck using a considerable
power, otherwise it will slide through.

Maintenance and service

Attention! Risk of el. shock. Prior to start any opera-
tion, pull the plug out of the socket!
‰ The vent holes (5) of the engine cover must not get plugged.
‰ After about 200 hours of operation the following works need
to be done:
- Check of the brushes length Brushes shorter than 5 mm must
be replaced with new ones.
- Exchange of lubricating grease in the gearbox and bearings.
To keep the protection class the machine needs to be checked in
terms of safety, and therefore these works must be carried out in
an authorised electric workshop holding the relevant licence to
perform these kinds of activities.
Attention! With respect to protection from el. shock
and preservation of the class of protection, all mainte-
nance and service operations requesting jig saw case
removal must be performed by the authorized service centre
only!
The current list of authorized service centres can be found at our
website www.narex.cz, section "Service Centres".