Maintenance - MTD GCS 50 Bedienungsanleitung

GB
b) In case of a less strong kickback, the chain bra-
ke can be automatically engaged by consequent
contact of the lever with the left hand.
Consequently: always grip the chainsaw with
both hands.
Always remember that the chain brake
does not represent a total protection.
It is therefore crucial to avoid all
the hazard situations explained in the pre-
vious SAFETY DEVICE CHAPTER (points of
paragraphs A17-A18)
c) The chain brake can be applied manually by
pushing it forward.
d) The brake is released by pulling the lever
towards the front handle (fig. 31).
Fig. 31
e) Before starting each job:
- check manually that the lever click releases both
forwards and backwards
- put the chain saw on a safe surface
- start the engine
- engage the brake (fig 30)
- take with both hands
- push deeply the throttle trigger for very few time
(around 2 seconds)if the chain starts moving, if
the clicks are not released or the chain brakelever
becomes hard, do not use the chain saw.
Please ask to a qualified service center
- Periodically remove all shavings and sawdust
from the visible parts of the chain brake
48
CHAIN SAW OPERATING MANUAL
STOP
Do not attempt repairs or modifica-
tions.
8.4 "MINIMUM" ENGINE RPM ADJUSTMENT
- SCREW [t]
- The carburettor of your chainsaw has been set
at standard values during manufacture. To regu-
late minimum engine rpm, only screw [T] can be
used (fig. 19).
Because such adjustment requires specific
training and work tools, always contact
an AUTHORISED AFTER-SALES SER-
VICE.
Screw [T]: hold the butterfly valve slightly open
so as to be able to regulate the "MINIMUM" rpm
at an appropriate rotation speed.
CAUTION - HAZARD!! A high adjustment
of the "minimum" rpm could trigger the centri-
fugal clutch and set the cutting chain in motion
even when the throttle lever is released.

9. MAINTENANCE

DANGER!! Never carry out any test,
maintenance or repair work with the
engine running.
9.1 CHAIN
MAINTENANCE AND SHARPENING
- When the chain is properly sharpened, the work
is not tiring, the cutting yield is high, and there is no
abnormal wear on the mechanical parts or the bar.
- If the chain is not sufficiently lubricated, increase
the oil flow by rotating the setting screw of the
pump clockwise (fig.34).
- Before sharpening, the chain must be
made taught by means of the chain
tensioner (fig.9) see the section on
"MOUNTING THE BAR AND CHAIN ".
- After sharpening, slacken the chain as per the
mounting instructions.