Vari Lucina Max BDR-620, User Manual, Page: 23 / 60

Lucina MaX
2.5.3 Work
blades service and exchange

Seek authorised service in case you lack appropriate manual skills.
If the work blades are deteriorated or damaged and causing cutter vibrations, it is necessary to renew or exchange the blades
53
.
Note: he manufacturer bears no responsibility for damages caused by/on the cutter in case of a botched-up blades repair or when
original parts are not used. A sign identifying the manufacturer is imprinted in the blade and it is used as a proof of a genuine part.

The cutter must be secured from unexpected spontaneous movement and stand on a safe pad to allow adequate access to the
blade.

Pay special attention when dismounting the blades. The cutting blades are sharp. Protect your hands with work gloves.

The engine must be off and the end of the spark plug cable must be taken off!
Proceedings:
1) Hold the upper disc so that it does not spin and use tubular wrench n.16 to dismount the bolted connection of the blade. First
unscrew the nut, than the bolt.
2) Take the blade and its parts out of the cutting disc. Align the blades and sharpen them. The blade slope should hold 30º angle
with the bottom blade level.
3) Check all blade parts for visible marks of damage. In case of damage, exchange the part with a new one.
4) Tighten the blade seating back. Tighten the bolt firmly 54 . Secure the bolt from loosening with a nut.

If some of the blades are bended or deteriorated you must exchange all cutting disc blades!
2.5.4 Belt transmission – automatic brake
The cutter is equipped with modern belts that do not require special care. It is only necessary to control them regularly and exchange
them should you see cracks or breaks on their surface. It is necessary to check on the tightening pulleys setting after the first 5 hours of
operation, as the belt is being run-in. It is necessary to check the tightening pulleys function during the running-up, in order to prevent belt
damage caused by insufficient tension when the belt extends. It is also important to check the function of the automatic disc brake during
the running-up.
The correct belt transmission function is easy to check:
a) Turn on the wheel drive and let the cutter deal with a 10 cm terrain obstacle – e.g. a kerb.
b) The engine stalls when you press the wheel drive clutch quickly. The belt already starts to grip (the disc starts
spinning) in just 1/3 step of the wheel drive clutch lever.
If you had problems with at least one of these, the tightening pulleys need adjustment.
2.5.4.1 Tightening pulleys adjustment

Seek authorised service in case you lack appropriate manual skills.
First : Dismantle the top plastic cover, so that you can see both belts (
Pict.11
) securing the forward movement of the machine. Try
again to overcome terrain irregularities and visually check belt slipping.
1) If the belt slipping occurs on the right side of the cutter , tighten it by unscrewing the bolt 3 at the cable
55
terminal in
the direction of the arrow (away from the frame) for approximately 1 mm, and repeat the visual check as in a) . Continue
tightening until condition a) is met and at the same time the cutter start moving forward while wheel drive clutch lever is loose. If
the bolt 3 cannot be unscrewed any further, screw it in completely against the direction of the arrow and hook the spring at the
end of the cable into a further opening in the pulley arm. Repeat tightening the belt until condition a) is met.
2) If there is belt slipping between the engine and gearbox , tighten it with the tightening pulley 4 . Loosen the pulley by
loosening the nut placed below the pulley. Use an appropriate tool (e.g. steel hook) to tighten the pulley in the direction of the
arrow and tighten the nut while the pulley is stretched. Then check the right function of the wheel drive.
In case the tightening pulleys cannot be adjusted to prevent belt slipping, it is necessary to exchange the belt.
Second : Dismount the front plastic cover so that you can see the belt and disc drive pulley (
Pict.12
). (
Marking 1 a 2 in pictures 11
and 12 are the same and belong to the same cable.)
1) Tighten the belt by unscrewing the bolt
56
1 in Pict.11 for approximately 1 mm in the direction of the arrow (away from the
frame) and repeat the check according to b) . Continue tightening until condition b) is met and at the same time the belt
transmission grip
57
stops while wheel drive clutch lever is loose. If the bolt 1 cannot be unscrewed any further, screw it in
completely against the direction of the arrow and hook the spring at the end of the cable into a further opening in the pulley arm.
Repeat tightening the belt until condition
b) is met.

Check the automatic brake function after every adjustment!
2.5.4.1.1 V-belt exchange
Exchange the V-belt with a new one
58
every time you see cracks or breaks in its surface, or when it is so deteriorated that it cannot be
tightened with the tightening pulleys. Exact instructions for belt exchange are not included here, as their contents exceed the limitations of
this manual. When exchanging the belt, follow
Pict.13 , 6 . Follow belt track around all guide elements!
53 The blades are double-sided; they can be turned around if necessary. The blades must never be damaged.
54 Insufficient bolt tightening usually destroys the hardened washer around which the blades spin.
55 You may also use the bolt attached to handlebar rail on the other side of the cable. In this case, screw the bolt in the direction away from the rail.
56
You may also use the bolt attached to handlebar rail on the other side of the cable. In this case, screw the bolt in the direction away from the rail.
57 Manifests itself by chattering and irregular belt grip.
58 Use V-belts recommended by the manufacturer only. Proper transmission function cannot be guaranteed when using other V-belts.
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