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Helpline No. UK/Northern Ireland 0151 6491500
Rep. Ireland 1890 946244
Model Number: 8073
Helpline No. UK/Northern Ireland 0151 6491500
Rep. Ireland 1890 946244
Model Number: 8073
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3
After making adjustment, and while still holding
nose of bar in the uppermost position, tighten the
bar retaining nuts securely. Chain has proper
tension when it has a snug fit all around and can be
pulled around by gloved hand.
Note:
If chain is difficult to rotate on guide bar or if it binds,
too much tension has been applied. This requires minor
adjustment as follows:
4
Loosen the bar retaining nut so they are finger
tight. Decrease tension by turning the bar
adjustment screw COUNTERCLOCKWISE slowly.
Move chain back and forth on bar. Continue to
adjust until chain rotates freely, but fits snugly.
Increase tension by turning bar adjustment
screw CLOCKWISE.
5
When saw chain has proper tension, hold nose of
bar in the uppermost position and tighten the bar
retaining nut securely.
Caution:
A new saw chain stretches, requiring adjustment
after as few as 5 cuts. This is normal with a new chain, and
the interval between future adjustments will lengthen quickly.
Caution:
If the saw chain is TOO LOOSE or TOO TAUT, the
drive wheel, chain bar, chain and crank shaft bearing will
suffer premature wear. Fig. 12 shows the correct tension A
(when cold) and tension B (when warm). Fig. C shows a
chain that is too loose.
12
Getting Started
4
Before starting the machine
Chain break mechanical test
Your chain saw is equipped with a Chain brake that reduces
possibility of injury due to kickback. The brake is activated if
pressure is applied against brake lever when, as in the event
of kickback, operator’s hand strikes the lever. When the brake
is actuated, chain movement stops abruptly.
Warning:
The purpose of the chain brake is to reduce the
possibility of injury due to kickback; however, it cannot provide
the intended measure of protection if the saw is operated
carelessly. Always test the chain brake before using your saw
and periodically while on the job.
To test chain brake
1
The Chain brake is DISENGAGED (chain can move)
when BRAKE LEVER IS PULLED BACK AND
LOCKED (Fig. 13).
2
The chain brake is ENGAGED (the chain is locked)
when the brake lever is pulled forward and the
mechanism (Fig. 14/Item A) can be seen. It should
not be possible to move the chain (Fig. 14).
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