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| English
F 016 L81 142 | (7.12.16)
Bosch Power Tools
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.
Warning: Switch off and remove plug from mains before investigating fault.
Maintenance and Cleaning
Warning! Switch off, remove plug from mains before
adjusting, cleaning or if cable is cut, damaged or entan-
gled.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
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
14
. 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.
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.
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 circular groove of the chain bar will wear particularly on
the lower edge with time. When replacing the saw chain, turn
the chain bar by 180° to allow even wear, thus extending
chain bar life.
Reverse the chain tensioning catch
23
by removing the
screws and refitting it on the opposited side.
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
, so that the red dot
28
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
intermittently
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
2
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
Tension saw chain
Dull saw chain
Sharpen saw chain or replace
Chain saw rips, vibrates,
does not saw properly
Chain tension too loose
Tension saw chain
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-1238-002.book Page 26 Wednesday, December 7, 2016 2:54 PM
