How To Use; Maintenance And Inspection - Zenit Powertools SEMI-PROFI Series Instruction Manual

can be bored by rotation only. Such action will not only reduce drill efficiency, but may
also damage the drill tip. Operating the Impact Drill with the change lever in mid-posi-
tion may result in damage. When switching, make sure that you shift the change lever
to the correct position.
ATTENTION
To prevent accidents, make sure to turn the switch off and disconnect the plug from
the receptacle when the drill pits and other various parts are installed or removed. The
power switch should also be turned off during a work break and after work.
Switch operation
This rotary hammer can be used in hammering, rotation + hammering and drilling
modes. Before operation set both switches in needed mode.
ATTENTION
Application of force more than necessary will not only reducing drilling efficiency at
all, but will deteriorate the tip edge of the drill bit and reduce the service life of the
rotary hammer in addition.
Do not attempt to drill anchor holes or holes in concrete with the main unit in the rota-
tion only function.
Do not attempt to use the rotary hammer in the rotation and striking function with the
drill chuck and chuck adaptor attached. This would seriously shorten the service life of
every components of the machine.
1. Inspecting the drill bits.
Since use of a dull tool will cause motor malfunctioning and degraded efficiency, replace
the drill bit with a new one or resharpening without delay when abrasion is noted.
2. Inspecting the screws
Regularly inspect all mounting screws and ensure that they are properly tightened.
Should any of the screws be loose, retighten them immediately. Failure to do so could
result in serious hazard.
3. Maintenance of the motor.
The motor unit winding is the very "heart" of the power tool. Exercise due care to en-
sure the winding does not become damaged and/or wet with oil or water.
4. Inspecting the carbon brushes.
The motor is equipped with carbon brushes, which wear with time. When a brush reach-
es the wear limit, the motor may malfunction. If the engine is equipped with a disengag-

how to use

Maintenance anD inspection

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