Troubleshooting Charts; Clutch, Chain Drive, Chain Brake And Chain Tensioner - Stihl 020 T Service Manual

2.

TROUBLESHOOTING CHARTS

2.1

Clutch, Chain Drive, Chain Brake and Chain Tensioner

Condition
Saw chain turns at idle speed
Loud noises
Chain sprocket wears rapidly
Chain wears rapidly
Chain does not stop immediately
when brake is activated
STIHL 020 T
Cause
Engine speed too high
Spring hooks broken
Clutch springs stretched or
fatigued
Needle cage damaged
Clutch shoe retainer broken
Clutch shoes and carrier
worn
Chain not properly tensioned
Chain not properly tensioned
Poor chain lubrication
Worn chain sprocket
Brake spring broken
Brake band stretched or
broken
Remedy
Readjust at idle speed
adjusting screw
(counterclockwise)
Fit new springs
Replace all clutch springs
Fit new needle cage
Fit new retainer
Fit new clutch
Tension chain as specified
Tension chain as specified
Check chain lubrication and
rectify problem
Fit new sprocket
Fit new brake spring
Fit new brake band
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