21
MS 192 T
:
Slip sprocket (1) onto crankshaft
stub.
217RA059 TG
1
The sprocket must engage the
studs (arrow) of the wormwheel.
– Reassemble remaining parts in
reverse order.
217RA060 TG
The chain brake is one of the most
important safety devices on the
chainsaw. Its efficiency is measured
in terms of the chain braking time,
i.e. the time that elapses between
activating the brake and the saw
chain coming to a complete
standstill. The shorter the braking
time, the better the efficiency and
protection offered against being
injured by the rotating chain.
The coefficient of friction is impaired
by contamination (with chain oil,
chips, fine particles of abrasion,
etc.) and smoothing of the friction
surfaces on the brake band and
clutch drum. This in turn reduces
the frictional forces and thus
prolongs the braking time. A
fatigued or stretched brake spring
has the same negative effect.
– Start the engine.
– With the chain brake activated
(locked), open the throttle wide
for a brief period
(max. 3 seconds) – the chain
must not rotate.
– With the chain brake released,
open the throttle wide and
activate the brake manually – the
chain must come to an abrupt
stop.
The braking time is in order if
deceleration of the saw chain is
imperceptible to the eye.
If the chain brake does not operate
properly, see troubleshooting chart,
Removal
– Troubleshooting,
– Remove the sprocket cover and
bar and chain,
:
Engage the chain brake by
217RA025 TG
1
pushing the hand guard (1)
downwards.
The brake spring of the brake band
is now relaxed.
:
Take out the screws (arrows).
217RA026 TG
7.
Checking Operation of
Chain Brake
7.1
Removing and Installing
Содержание ms 192t
Страница 1: ...STIH STIHL MS 192 T 2005 02...
Страница 98: ...englisch english 0455 217 0123 M5 B5 T Printed in Germany...