Vari Liza DS-520, Инструкция по применению Инструкция по применению, Страница: 17 / 31

DS-520 Líza
DS-520H Líza
17
c) Dismount the upper casing (spanner No. 8, spanner No. 10). Dismount the bolt with nut
in front of the driven belt pulley (see Fig. 4.1) (spanner No. 10). Take the old V-belt off
and replace it with a new one. V-belt marking is GATES A48 BareBack. It is also
possible to use an equivalent V-belt made by other manufacturers at a size of A13x1220
Li (Li=internal length). However, the belt must be made without rubber on sides! Only
such a belt model will guarantee that the blade drive start is smooth at engaging the
clutch.
,
Should a different belt model be used, the machine manufacturer does not bear any
responsibility for proper and full functioning of the gear!
d) Put the engine back in place and bolt it by using three safety nuts with flat washers. Slide
the V-belt into the groove in the driving belt pulley (on engine). Screw the accelerator
lever back onto the handlebars.
e) Check tightening pulley operation. With the control bar being completely pressed, the
pulley must ensure a sufficient belt tension (spring on wire being extended by about 5
mm as compared with the loose condition). Possible corrections are to be made by means
of adjustment bolt (see Figure 7). With the control bar switched off, the pulley must be
inclined from the longitudinal machine axis at an angle of 5° (see Fig. 6) and the wire in
the tightening pulley Bowden cable must exhibit no slackness. Guide lamination on the
right side of the machine must be parallel to the tense V-belt and at a minimum. Distance
of tightening pulley bottom from belt convex side must be 1-2 mm.
f) Mount the bolt with nut in front of the driven belt pulley. Mount the V-belt casing.
Driven belt pulley
(mowing disk)
Driving belt
pulley (engine)
Tightening pulley
V-belt
Figure 6: Adjustment of tightening pulley and maximum V-belt extension