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Bosch Power Tools F 016 L81 139 | (16.10.14)
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
Before any work on the machine itself, pull the mains
plug.
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.
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.
Replacing/Changing the Saw Chain and Chain Bar
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.
Check the drive sprocket 20. If it is worn out or damaged due
to strain, have it exchanged by an authorized Bosch after-
sales service.
Sharpening the Saw Chain
Have your chain sharpened professionally at your authorised
Bosch after-sales service or sharpen it yourself with a sharp-
ening kit suitable for the chain recommended for your chain-
saw. Observe the sharpening instructions provided with the
sharpening kit.
Checking the Automatic Oiler
Proper functioning of the automatic saw chain oiler can be
checked by running the chain saw and pointing the tip of the
chain bar towards a piece of cardboard or paper on the
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 (see figure F)
Plug not connected Connect plug
Mains socket faulty Use another socket
Extension cable damaged Check cord, replace
Fuse faulty/blown Replace fuse
Chain saw operates intermit-
tently
Extension cable damaged Check cord, replace
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-2245-001.book Page 29 Thursday, October 16, 2014 11:51 AM
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