Crown CT18114, Original Instructions Manual

Page: 33 / 196

33
English
operating your power tool, but allows setting the chisel
in a comfortable position for chiselling works�
In order to make switching between
the operation modes smoother, rotate
slightly chuck 1 (SDS PLUS) or chuck 16
(SDS MAX) by hand.
Speed selector thumbwheel
[CT18118V, CT18158V]
Use speed selector thumbwheel 19 to set required
revolutions and impact frequency�
[CT18123V]
Use speed selector thumbwheel 19 to set required im-
pact frequency and power of impact�
The required speed is dependent on the material and
can be determined with practical trials�
When operating your power tool at a low speed for a long
time, it has to be cooled down for 3 minutes� To do it, set
a maximum speed and leave your power tool to run idle�
Vibration protection system
The vibration protection system is design to reduce vi-
bration impact (during operation) on the operator�
Safety clutch
[CT18114, CT18116, CT18118, CT18118V, CT18158,
CT18158V]
The safety clutch protects the power tool against over-
load and damage in case of accessory sticking during
drilling�
Carbon brush replacement indicator
[CT18123V]
Carbon brush replacement indicator 21 - signals about
need to replace the carbon brushes�
Recommendations on the power tool op-
eration
Wear thick soft gloves when working to
reduce vibration impact on your body.
Always use additional handle 4 when
working, it will ensure a better control of
your power tool and reduce recoil.
Drilling (see fig. 16-17)
[CT18114, CT18116, CT18158, CT18158V
]
Caution: drill wood and metals in the im-
pactless drilling operation mode only.
• Grease the drill bit regularly when drilling holes in
metals (except drilling non-ferrous metals and their al-
loys)�
• When drilling hard metals, apply more force to the
power tool and lower the rotation speed�
• When drilling large diameter holes in metal, first drill
a hole with a smaller diameter and ream it till the nec-
essary diameter (see fig. 16.1).
•
In order to avoid splitting of the surface at an exit
point of a drill bit when drilling holes in wood, follow the
instructions shown in figure 16.2.
• When drilling holes in glazed ceramic tiles, in order
to improve the drill centering accuracy and to save
the glaze from damage, apply adhesive tape to the
presumed hole center and drill after that (see fig. 17).
Caution: drill tiles in the impactless drilling opera-
tion mode only.
Impact drilling (see fig. 18)
[CT18114, CT18116, CT18118, CT18118V, CT18158,
CT18158V]
• At impact drilling the result does not depend on the
pressing force you apply to your power tool, which is
due to the impact mechanism design� This is why do
not exert excessive pressure on your power tool, as it
may result in borer seizing and motor overload�
•
In order to decrease dust production when drilling
holes in walls and ceilings, take actions indicated in
fig. 18.1. Mount dust collector 14 as shown in fig -
ure 18�2 for drilling holes in the ceilings�
Chiselling
• When working, make sure to properly adjust the
working accessory to the material being processed:
not too close to the edge as the power tool will need
to be displaced often, but not too far as the accessory
can get stuck in the material being processed�
• Press the power tool while holding it tightly with both
hands� Do not use excessive force: the energy of the
percussion mechanism is enough for the effective per-
formance�
• Avoid the excessive penetration of the working ac-
cessory into the material being processed (for exam-
ple, when loosening the soil or in the course of the
building structures destruction) as the working acces-
sory may become stuck�
• If the working accessory becomes stuck in the ma-
terial during the operation, do not attempt to free it
with the use of the power tool as a lever as the power
tool can be damaged� Remove the power tool from
the jammed accessory� Continue the operation with
the use of another accessory in order to release the
jammed one� Note: it is strictly prohibited to knock
out the jammed working accessories or to swing it
and to try to extract it with the use of foreign tools
or objects (pieces of pipe, winches, jacks, etc.).
Power tool maintenance / preventive
measures
Before carrying out any works on the power tool it
must be disconnected from the mains.
Power tool lubrication
[CT18114, CT18116, CT18158, CT18158V]
The power tool lubricant quantity has to be checked on
a regular basis after every 40-50 hours of operation,