Bosch GKE 35 BCE Professional User Manual download pdf (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

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