Bosch GKE Professional 40 BCE Original Instructions Manual page 26

OBJ_BUCH-716-004.book Page 26 Tuesday, August 23, 2011 3:50 PM
26 | English
– Turn locking knob 14 approx. 1 – 3 turns anticlockwise to
loosen the chain bar.
– Check if the chain links are correctly located in the slot
around the chain bar 11 and on the drive sprocket 18.
14 13
– Turn the red chain-tensioning ring 13 clockwise ratcheting
until the correct chain tension is reached. The ratchet
mechanism prevents the chain tension from loosening. If
the chain-tensioning ring 13 is hard to turn, loosen the
locking knob 14 further in anticlockwise direction. The
locking knob 14 may also turn, when adjusting the chain-
tensioning ring 13.
– The saw chain 10 is correctly tensioned when it can be
raised approx. 3 – 4 mm from the chain bar in the centre.
This should be done by using one hand to raise the saw
chain against the weight of the machine.
– If the saw chain 10 is overtensioned, turn the chain-ten-
sioning ring 13 in anticlockwise direction.
Clamping the Chain Bar
– When the chain 10 is tensioned, clamp the chain bar 11 by
turning the locking knob 14 in clockwise direction. Do not
use a tool for this.
14
Saw-chain Lubrication (see figures A–B)
Note: The chain saw is not supplied filled with oil. It is essen-
tial to fill with oil before use. Operating the chain saw without
chain oil or when the oil level is below the minimum mark will
result in damage to the chain saw.
Chain life and cutting capacity depend on optimum lubrica-
tion. Therefore, the chain is automatically lubricated with
chain oil during operation via the oil outlet 19.
Filling the oil reservoir:
– Set chain saw on any suitable surface with the oil filler cap
4 facing upward.
– Clean area around the oil filler cap 4 with a cloth and un-
screw the cap.
1 609 929 V11 | (23.8.11)
– Do not remove filter insert during filling.
– Add Bosch biodegradable chain saw oil until reservoir is
full.
– Avoid dirt or debris from entering the oil reservoir. Screw
on oil filler cap 4 again and tighten.
Note: Four small compensation channels allow for pressure
compensation between the oil reservoir and the environment.
For functional reasons, minor amounts of oil can escape here.
Please take care to place down the chain saw with the oil filler
cap 4 facing upward.
Note: It is important to use only the recommended biodegrad-
able oil to avoid damage to the chain saw. Never use recycled/
old oil. Use of non approved oil will invalidate the warranty.
Dust/Chip Extraction
Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
10
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
Operation
Starting Operation
Observe the mains voltage! The voltage of the power
source must correspond with the data on the type plate of
the machine.
Switching On and Off
Hold the chain saw as described in section "Working with the
Chain Saw".
To start the machine, first push the lock-off button for the
On/Off switch 2 and then press the On/Off switch 3 and keep
it pressed.
To switch off the machine, release the On/Off switch 3.
Note: For safety reasons, the On/Off switch 3 cannot be
locked; it must remain pressed during the entire operation.
Note: Do not stop chain saw after sawing by actuating the
front hand guard 5 (activating the kickback brake).
Reduced starting current
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Temperature Dependent Overload Protection
In case of overload, e. g., when the saw chain is dull, the mo-
tor can stop due to actuation of the thermal safety switch.
Press the reset button 25 to reset the safety switch. After-
wards, the chain saw must be operated at no-load for approx.
1 minute.
Bosch Power Tools