Weka TK40 ANNA Operating Instructions Manual page 28

All chains have the tendency to stretch under
load. If the distance between the drive
member and the sword is larger than 12 mm
(1/2 "), the chain must be retensioned (see
distance A).
Raise the top of the bar by hand and close the
eccentric lever to the vertical position. If the
eccentric lever can not be closed, or only very
difficult to close, slightly turn the eccentric
lever back and try to close the eccentric lever
again.
If the eccentric lever is in an unfavorable
position, you can adjust the position of the
eccentric lever by turning the knurled nut.
It must be possible to pull the diamond chain
by hand around the bar easily.
4.5 Change the position of the adjustable handle
In order to change the position of the adjustable handle [3] open the cam lever [11] in a horizontal
position. Adjust the handle in the requested position. Take care that the handle is catched in the
requested position and close the cam lever in a vertical position.
5. O P E R A T I O N
5.1 Material
Proper use extends only to the sawing of rock, concrete and masonry. The saw must
not be used for cutting pure metals. For the cutting of ductile iron pipes special chains
are available in the specialist trade.
When cutting reinforced concrete, try to cut the reinforcement together with as much concrete as
possible - this saves the chain.
5.2 Sawing technology
Avoid blockage of the sword and the diamond chain by excessive pressure, lateral load
and excessively deep cuts. Let the machine work without excessive force.
Carefully attach the diamond chain at high speed and maintain the high speed over the entire cut.
Always try to obtain a small contact area between the diamond chain and the material to be cut. In
this way the chain is spared and effective cutting is made possible.
Plunge
With the lower part of the bar tip, cut an approx. 10cm deep cut. Point the chain saw and, at the same
time, plunge the bar into the cut to the desired cutting depth.
By moving the saw up and down, the cut can be expanded efficiently and a small contact surface
between the diamond chain and the material to be cut is realized.
If necessary, press the claw [6] into the saw cut. The wall claw serves as a point of rotation to enable
a vigorous cutting by the leverage of the saw. Please note that a too strong contact pressure
increases the chain elongation.
Pre-cut
If a disc saw is used for cutting, care must be taken that the thickness of the cutting
blade matches to the diamond chain. Never use a disc saw with a conventional cutting
disc for cutting. The narrow saw groove produced in this case leads to a jamming of
the diamond chain and can lead to dangerous kickback.
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