ZSX Ec
02/2022
17
4.4
Chain tension
Safe operation of the machine and a long service life of the entire chain fitting require a correct chain tension.
This tension must therefore be checked before starting work and every now and then during the operation. The
chain tension is correct when the cold saw chain is in contact with the guide rail and can be lifted off by hand
by 3 to 4 mm [0.12 - 0.16 in].
The saw chain elongates and sags when it is at operating temperature. The saw chain must be tensioned if the
elongation is such that the connecting links on the bar come out of the guidance.
Notice
Risk of damaging the machine when the saw chain shrinks. When cooling down to ambient temperature,
especially at a very low outside temperature, the contraction of the saw chain can exert very high shrinkage
stresses on the machine.
➢
If the saw chain requires tensioning once it is at operating temperature, releasing the tension from the
saw chain after finishing the sawing work is absolutely necessary.
Use the following procedure to retension the
saw chain:
1.
Pull out the power plug of the machine.
2.
Put down the cable where you can see it.
3.
Open the spring-loaded lower protective flap
(11) downward.
Fig. 14: Opening the protective flap
4.
Using the combination screwdriver (B), turn
the fastening screw (15) at the bottom of the
guide bar
counterclockwise
to loosen it
slightly.
5.
Open the guard sheet (16).
Fig. 15: Opening the guard sheet at the guide bar
