-28-
guide rail and can be manually lifted by 3 to 4 mm
(1/8 to 3/16 in.).
When heated to operating temperature, the saw chain
elongates and starts to sag. If the elongation is that
large that the chain links start to disengage from the
guide at the rail, the saw chain must be retensioned.
Danger
Pull the power plug during all
service work.
Proceed as follows to retension the saw chain:
•
Open the spring-loaded bottom guard flap 15
(Fig. 2) downwards. Using combination screw
driver 11 fastened on cover 12 (Fig. 1), slightly
release the hexagon socket head cap screw 18
(Fig. 2) through the bottom opening in cover 12
and screw 5 (Fig. 1).
•
Adjust the chain tensioning screw 20 through
the top opening in the cover (see Fig. 1) using
combination screw driver 11. Turning clockwise
means increasing and turning anti-clockwise
means decreasing the chain tension.
•
Tighten the hexagon socket head cap screw 18.
Fold up the protection for the bottom chain
deflection and tighten it with screw 5 (Fig. 1).
If the saw chain is retensioned after it has heated up,
it is absolutely necessary to slacken it again once
sawing has been completed. Failure to do so would
cause very high shrinkage stresses due to the saw
chain contracting when cooling down to ambient
temperature, in particular if very low outside
temperatures are prevailing.
Until it has elongated, a new saw chain must be
retensioned more frequently than a saw chain that
has already been used for a longer period of time.
4.4
Chain lubrication
Correct lubrication of the saw chain is of major
importance for its life time. A dry running chain will
quickly damage the entire chain set irreparably.
Lubrication is adequate if a trail of oil is visible
between saw chain and guide rail.
It is therefore important to check the chain lubrication
function prior to the start of work and to check the oil
level in the lubricant tank. It may not drop below the
marking placed in cover 12 (Fig. 1) next to inspection
window 14. Only use biodegradable oil for the refill.
The oil tank filling quantity amounts to approx. 0.3
litres.
Danger
Pull out the mains plug before
starting to adjust the chain
lubrication. If any oil should get into
your eyes during refilling,
immediately rinse them with a
copious amount of water. Spilled oil
must be absorbed with commercial
oil binders. The handles must be
free from oil!
The flow rate of the built-in oil pump can be adjusted.
A normal dosing rate has been set at the factory,
which can be verified by the fact that an oil trace is
visible between saw chain and guide rail. However, if
necessary, the dosing rate can be changed. Proceed
as follows:
•
Unfasten cylinder head bolt 13 using
combination screw driver 11 enclosed in the
supply and fastened on cover 12 (Fig. 1) and
fold down the cover.
•
Open the spring-loaded bottom guard flap 15
(Fig. 2) downwards and fasten it with the cover
in open position.
•
Unscrew the hexagon socket head cap screw
18 (Fig. 2) and remove the Intermediate cover
19 including the oil tank.
•
Dosing screw 25 (Fig. 4) that is now accessible
at the rear of the intermediate cover can be
used to adjust the oil pump's flow rate. Turning
the screw clockwise increases the flow rate,
turning it anti-clockwise decreases the flow rate.
•
Refit the intermediate cover 19 (Fig. 2) and
tighten it with hexagon socket head cap screw
18.
•
Unlock the bottom guard flap 15 (Fig. 2). Fold
up the cover 12 (Fig. 1) and tighten the cylinder
head bolt 13. Fasten combination screw driver
11 in the brackets inside the cover.
•
Whether the flow rate now meets the
requirements can now be checked by briefly
switching on the machine.
