Bosch GKE 35 BCE Professional - Manual (Page 29)

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Bosch Power Tools 1 609 929 V11 | (23.8.11)
Troubleshooting
The following chart lists problem symptoms, possible causes and corrective action, if your machine does not operate properly.
If these do not identify and correct the problem, contact your service agent.
f
Warning: Switch off and remove plug from mains before investigating fault.
Maintenance and Service
Maintenance and Cleaning
f Warning! Switch off, remove plug from mains before
adjusting cleaning or if the cable is cut, damaged or en-
tangled.
f For safe and proper working, always keep the machine
and ventilation slots clean.
Note: To ensure long and reliable service, carry out the follow-
ing maintenance regularly.
Regulary check the chain saw for obvious defects such as
loose, dislodged or damaged saw chain and chain bar, loose
fixings and worn or damaged components.
When disassembling the saw chain, take care that the chain is
first loosened with the chain tensioning ring 13. Disassembly
of the chain saw without first loosening the saw chain can
damage the chain saw.
Check that covers and guards are undamaged and correctly
fitted. Carry out necessary maintenance or repairs before us-
ing.
If the chain saw should fail despite the care taken in manufac-
ture and testing, repair should be carried out by an authorised
customer services agent for Bosch power tools.
Note: Before returning the chain saw, ensure all oil in the oil
reservoir has been emptied. For this, remove the sieve from
the reservoir, empty the reservoir and replace the sieve again.
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the type plate of
the chain saw.
Replacing/Changing the Saw Chain and Chain Bar
(see figure A)
Check the saw chain and chain bar according to section “Ten-
sioning the Saw Chain”.
The guide slot around the chain bar will wear with time. When
replacing the saw chain, turn the chain bar by 180° to allow
even wear. The chain tensioning catch 22 must also be re-
mounted on the chain bar.
Check the drive sprocket 18. If it is worn out or damaged due
to strain, have it exchanged by an authorized Bosch after-
sales service.
Problem Possible Cause Corrective Action
Chain saw fails to operate Kickback brake is activated Pull activation lever for kickback brake (hand
guard) 5 back in position n, so that the red dot 26
is covered
Plug not connected Connect plug
Mains socket faulty Use another socket
Fuse faulty/blown Replace fuse
Extension cable damaged Try without extension cable
Chain saw operates intermit-
tently
Mains cable defective Check mains cable and have it replaced, if required
External or internal wiring defect Contact your Bosch Service Centre
On/Off switch 3 defective Contact your Bosch Service Centre
Saw chain dry No oil in reservoir Refill oil
Vent in oil filler cap 4 clogged Clean oil filler cap 4
Oil passage clogged Clean oil passage
Brake does not stop saw
chain
Kickback brake/run-down brake defective Contact your Bosch Service Centre
Saw chain/guide bar hot No oil in reservoir Refill oil
Vent in oil filler cap 4 clogged Clean oil filler cap 4
Oil passage clogged Clean oil passage
Chain tension too high Adjust chain tension
Dull saw chain Sharpen saw chain or replace
Chain saw rips, vibrates,
does not saw properly
Chain tension too loose Adjust chain tension
Dull saw chain Sharpen saw chain or replace
Chain worn out Replace saw chain
Chain teeth are facing in the wrong direc-
tion
Reassemble with chain in correct direction
OBJ_BUCH-716-004.book Page 29 Tuesday, August 23, 2011 3:50 PM