Vari Hurricane F-700 Instructions For Use Manual - page 23
F-700
23
The procedure of replacing V-belts is as follows:
a) Drain petrol from the engine tank. Remove the plastic ball from the accelerator lever.
Dismount the accelerator lever from the handlebars crossbar. Bowden cable should
never be dismounted from the control on the engine! Then dismount (or fold back) the
handlebars holder (4x bolt M8) together with the handlebars.
b) Dismount the upper casing of gearbox and the front plastic casing of the belt.
c) Dismount the belt guiding in front of the front driven belt pulley of the blade.
d) Remove belts from the driven belt pulleys (leaving belts on the engine). Unscrew four
bolts M8 from the engine plate and carefully remove the plate from the machine
together with the engine and the belts by pulling upwards.
Never put the engine on the side. Oil might get into the exhaust or into the air
cleaner. The best engine seating is with the lower flange dwelling on two scantlings
that are at least 10 cm high.
e) Replace the worn belts with new ones. It is advised that the two belts are both replaced
in one operation.
f) Assemble the machine in a reverse sequence of operations. Check the adjustment of
both tension pulleys prior to the assembly of casings (see „b)“).
g) Complete the machine assembly.
6.4.2 Adjustment of tension pulleys
1) Blade drive pulley: With the lever on the right handlebar grip fully pressed down, the
pulley must ensure a sufficient belt tension (spring on the cable being extended by
about 10 mm as compared with loose condition). Possible corrections are to be made
by means of adjustment bolt No. 2 (see Fig. 12). With the lever switched off, the
pulley must be tilted away from the longitudinal machine axis at an angle of max. 0 -
5° = with the belt convex side being approx. 1,5 – 2 cm from the bottom of the
tension pulley (see Fig. 12). The wire in the Bowden cable of the tension pulley must
exhibit no slackness. In the case that the adjustment bolt is completely screwed out
and it is necessary to tighten the V-belt, the spring on the cable can be hooked into the
front hole on the arm of the tension pulley (see Fig. 12 in the middle; Note: this
connection can be used already from the manufacturer) and belt tension can be
adjusted once again. Guide laminations on the right side of the machine must be
parallel to the belt and at a maximum distance of 1 – 2 mm from the belt convex side.
2) Wheel drive clutch pulley: With the lever on the left handlebar grip fully pressed
down, the pulley must ensure a sufficient belt tension (spring on the cable being
extended by about 10 mm as compared with the loose condition). Possible corrections
are to be made by means of adjustment bolt No. 4 (see Fig. 13). With the lever
switched off, the pulley must be parallel to the longitudinal machine axis. The wire in
the tension pulley Bowden cable must not show any slackness. In the case that the
adjustment bolt is completely unscrewed and it is necessary to tighten the V-belt, the
spring on the cable can be hooked into the front hole on the arm of the tension pulley
(Note: this coupling can be used already from the manufacturer) and belt tension can
be adjusted once again.