9MS 192 T
4.2 Chain Drive, Chain Brake, Chain Tensioner
Problem Cause Remedy
Chain sprocket wears rapidly Chain not properly tensioned Tension chain as specified
Wrong chain pitch Fit chain of correct pitch
Insufficient chain lubrication Check chain lubrication
Chain sprocket worn Fit new chain sprocket
Saw chain stops under load at full
throttle
Clutch shoes badly worn Install new clutch
Clutch drum badly worn Install new clutch drum
Brake band stuck Check freedom of movement and
function of brake band
Saw chain rotates at idle speed Idle speed too high Readjust with idle speed screw LA
(anticlockwise)
Clutch springs stretched or fatigued Replace clutch springs or install
new clutch
Clutch spring hooks broken Replace clutch springs
Saw chain does not stop
immediately when brake is
activated
Brake spring stretched or broken Fit new brake spring
Brake band stretched, worn or
broken
Fit new brake band
Clutch drum worn Install new clutch drum
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