Vari Hurricane F-550G, Руководство пользователя, Страница: 25 / 48

F-550

The nuts 1 are self-locking (with plastic insert). Always replace them with new ones when removing!

If the work tool has cracks, the blade or blade holder must immediately be replaced with a new one!

If you are not sufficiently technically competent, assign this task to a professional service centre.

We recommend that the quality of the blade is inspected after every 10 hours of use to ensure quality processing of the
vegetation, especially if the machine works under highly demanding conditions!

Take particular care when removing the blade. The blades edges are sharp. Protect hands with work gloves.

Never remove the blade for sharpening while the catcher is pressed on the shaft. The bearing seal may be damaged
and the bearing may be subsequently damaged during use!
Take a few seconds of your time to tighten the screw connections of the work tool prior to beginning work with the machine and after
each impact of the blade into a solid obstacle!

Failure to follow this principle places you at risk of injury if the work tool ever becomes loose!

The blade must always be balanced after every sharpening! An unbalanced blade causes machine vibration and
damage!
2.5.5 Belt drives, automatic brake
The machine is equipped with modern belts that do not require any particular care. They only require regular inspection and replacement
in the event that their surfaces contain cracks or tears. Factory setting of the tension pulleys must be inspected after approx. 5 hours of
use, after the belts are run in. When running in, the tension pulley function must be inspected to prevent damage caused by insufficient
tension of the pulley due to belt extension. The blade automatic brake must also be checked when running in.
2.5.5.1 Adjusting the belt drive tension pulleys
You can check the proper function of the tension pulleys using the following simple test.

The machine with the wheel drive turned on must overcome a surface unevenness of 10 cm – e.g. kerb is
suitable.

The belt begins to drift (the work tool spins) already when the work tool clutch lever is 1/3 depressed.
If at least one of the inspections fail, the tension pulleys must be adjusted!

If you are not sufficiently technically competent, assign this task to a professional service centre.
2.5.5.1.1 Adjusting the wheel drive tension pulley

If you are not sufficiently technically competent, assign this task to a professional service centre.
Remove the rear upper plastic gearbox cover 1 (on
Pic. 7
), to enable you to see both V-belts that drive the machine forward. Try
again to overcome the surface irregularity and visually check which, belt is slipping. (Designation A , B and C on Pic.11 , 12 , 13 and 14
is common and always refers to the same cable).
1) If the V-belt on the right side of the machine is slipping ( Pic.9 or Pic.10 ), tighten it by loosening the screw ( C on
Pic.13
) at the cable end 68 in the direction of the arrow (away from the frame) by approximately 1 mm. Continue tightening until
the machine overcomes surface irregularities, while remaining at rest when the wheel drive clutch lever is released. If the screw
C cannot be unscrewed further, screw it fully in the opposite direction to the arrow and hook the spring on the end of the cable
to the hole further away in the pulley arm. Subsequently repeat the steps for tightening the belt.
2) If the belt is slipping between the engine and the gearbox , tighten it using the tension pulley ( 1 on Pic.15 ). Release the
tensioner by loosening the nut on the engine plate and tighten the pulley with a suitable tool (e.g. screwdriver) in the direction of
the arrow, and tighten the nut while under tension. Subsequently check the correction operation of the wheel drive.

The belt must be replaced when you can no longer adjust the belt tensioner to prevent belt slippage.
2.5.5.1.2 Adjustment of the work tool drive tension pulley
Take off the front plastic cover 9 on
Pic.3
so that you can see the belt and blade drive pulley (
Pic.11
). (Designation A , B and C
on Pic.11 , 12 , 13 and 14 is common and always refers to the same cable).
54) Tighten the V-belt by loosening 69 the screw A on
Pic.12
by roughly 1 mm in the direction of the arrow and inspect the
clutch operation of the tool drive clutch. Continue tightening until the belt drive begins to turn the work tool when depressing the
clutch lever approx. 1/3, while ensuring meanwhile that the belt drive does not drift when the work tool clutch lever is released. If
the screw A cannot be unscrewed further, screw it fully in the opposite direction to the arrow and hook the spring on the end of
the cable to the hole further away in the pulley arm. Subsequently repeat the steps for tightening the belt.

Inspect the operation of the automatic brake after every adjustment.
68
You may also use screw ( C on Pic.14 ) on the opposite end of the Bowden cable attached to the handlebar traverse. In such an event, screw it from the handlebar traverse in the
direction of the arrow.
69
You can also use the screw on the opposite end of the Bowden cable attached to the handlebar traverse. In such an event, screw it away from the handlebar traverse.
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