Vari Hurricane F-550 User Manual - page 24
F-550
Always fully depress the clutch lever to the handles. Failure to depress the clutch lever fully will cause damage to
the V-belt.
6.
Engagement of the work tool is accompanied by partial slipping of the V-belt and associated side effects (chattering, squealing).
After the belt is worked in, this phenomenon usually disappears.
A new or cold engine may occasionally stall when engaging the work tool drive the first few times. This will disappear
after the engine has warmed up.
If the work tool drive cannot be engaged after the engine has warmed, check to see if any of the defects listed in
are present.
2.4.2.2 Starting, running the machine
Use the wheel drive clutch lever (
2
on
Pic. 3
) on the left handle to engage the wheel drive. Depress the lever fully to the handle and
the machine will immediately then begin moving forward. The walking speed must match the speed of the machine when depressing the
lever and starting the machine!
The drive clutch is engaged by a V-belt, you can depress the clutch slowly – the machine will gradually move forward
without jerking.
Always fully depress the wheel drive clutch lever to the handles. Failure to depress the clutch lever fully will
cause damage to the V-belt.
The wheel drive clutch lever cannot be used to regulate the drive speed! This will damage the V-belt.
Never move in reverse with the wheel drive clutch lever depressed! Do not overburden yourself with the machine.
2.4.2.3 Stopping the machine
If you need to stop the wheel drive, release the lever on the left handle. The machine wheel drive will stop, but the work tool will still
rotate. The work tool drive is turned off by releasing the lever on the right handle. The automatic brake will stop the work tool. Switch the
throttle lever to the
2
MIN or
1
STOP position according to
Pic. 4
Always turn off the engine and wait until the work tool stops, before engaging in any activity near the machine!
Always turn the engine off before leaving the machine!
Never let the engine running at maximum speed or idling for long periods, with the blade drive clutch and wheel drive
clutch turned off! This could result in damage to the drivetrain components (V-belt, pulley, clutch pulley, etc.)!
2.4.2.4 Selecting the wheel drive speed
The machine has two forward speeds. Slower (belt fitted according to
Pic. 10
) is preferable for dense, wet, or high vegetation; faster
(V-belt is fitted as shown in
Pic. 9
) is preferred for sparse, dry, or low laying vegetation.
Always adjust the drive speed to the type of vegetation or stop and wait for the work tool to process the material before
advancing!
Speeds are changed by moving the V-belt on the pulleys between the gearbox and the drive axle (see
Pic. 9
and
Pic. 10
). A sticker is
glued on the top gearbox cover (
Pic. 22
) with a picture of the belt positions in the pulleys on the gear box and the drive axle.
The engine must always be off and the gas lever in the
1
STOP position when the speeds are changed!
Procedure:
1)
Loosen the plastic nut
(
3
on
Pic. 7
), tilt out the upper gearbox cover
1
in the direction of the arrow and pull it out
diagonally backwards. Push in the foot
4
of the lower gearbox cover
2
, located in the middle of the rear section of the
frame until the cover releases and pops out of the frame tab
4
.
2)
Slide the whole V-belt of the pulley on the axle towards the left wheel. Subsequently then slide the V-belt from the pulley on the
gearbox towards the right wheel.
3)
Move the V-belt into the pulley groove on the axle that corresponds to the selected transfer ratio. Check visually and by touch if
the V-belt sits properly in the groove on the selected pulley.
4)
Move the V-belt into the pulley groove on the axle that corresponds to the selected transfer ratio. Check visually if the V-belt sits
in the correct pulleys according to the selected transfer ratio (see
Pic. 9
and
Pic. 10
). The V-belt must not cross!
5)
Reinstall both of the covers. Place the upper plastic cover under the engine plate, close it, and tighten the plastic nut. Bend the
bottom plastic cover upwards and place the opening into the foot
4
of the cover on the frame tab. Loosen the deflection of the
cover, and the cover will sink into place.
2.4.3 Working with the machine
2.4.3.1 Machine cutting width
The cutting width breadth should always be adjusted to the density of vegetation!
60
Loosen the plastic nut by about 1 to 2 turns. The cover contains a groove that enables removal of the cover without the need of unscrewing the plastic nut.
24
05
/2
01
2