Sharpening The Blades - Grillo FD 280 Manuel D'utilisation

SHARPENING THE BLADES

A blunt blade pulls at the grass, giving it an unsightly appearance. The cutting edges of both blades must therefore
always be kept sharp; worn blades must be replaced.
To do this it is best to remove the mower deck fig. 26. Proceed as follows:
1) Remove the guard above the deck by unscrewing the two screws fig. 18.
2) Remove the pin fig. 24 A.
3) Turn the lever counter-clockwise fig. 25.
4) Remove the PTO belt fig. 22
5) Release the fork fig. 20, pull the deck forward and set it vertical fig. 17, take care not to bend the adjuster cables.
It is advisable to open the grass catcher and take off the charge channel (fig. 33).
As the blades wear they lose their cutting efficiency and tend to become unbalanced, causing the mower to vi-
brate. If the unbalance persists even after sharpening, check the balance by inserting a screwdriver in the hole
in the centre of the blade and grind until the blade remains horizontal and therefore balanced.
To remove a blade, take hold of it firmly, wearing safety gloves, and undo the central screw.
(ATTENTION: the right blade screw has the left thread).
CAUTION!
Always replace damaged or bent blades; never attempt to repair them!
ALWAYS USE ORIGINAL BLADES!
CAUTION!
In order to reassemble the cutting deck, you have to fit together the cutting deck lead fig. 37 rif. A with the one
which is located on the machine, between the wheels, in the centre (fig. 37 rif. B).
ADJUSTING THE CUTTING DECK
A level deck is essential for a uniform cut over the whole lawn.
With the mower on a flat surface, check that the tyre pressure is correct, check the float spring tension.
If a satisfactory parallel setup cannot be achieved, adjust the register fig. 21.
To adjust the mowing height, set the lever n. 6 fig. 1 on the lowest setting, fit two 30 mm shims at the sides under
the edge of the deck, and set the wire fig. 24 pos. B under tension.
DRIVE BELTS - HYDROSTATIC AXLE
These belts are self-adjusting and do not require any adjustment. Simply check the springs tension. To replace
the belts, release the tension spring (pos. A, fig. 23).
PTO BELT
Caution! This belt is special, use only original belts.
To replace, proceed as already explained for replacement of the hydrostatic transmission belt (spring A, fig. 23):
1) Remove the guard above the deck by unscrewing the two screws fig. 18.
2) Remove the pin fig. 24 A.
3) Turn the lever counter-clockwise fig. 25
4) Remove the PTO belt fig. 22.
5) When refitting the belt (fig. 19), you have to make it pass completely through the bulkhead of the hydrostatic
axle and make sure that the screw remains in the middle (fig. 38).
The PTO belt is self-adjusting, it doesn't need adjustment.
DECK BELT
This belt is a A-A double-section special belt; it allows the blades controrotation. The belt tension is auto-adjusted
thanks to the spring A fig. 35. The spring must have 130 mm length (coils length).
For the substitution, please follow this procedure:
1. Disassemble the cover, which is positioned on the cutting deck, unscrewing the two screws fig. 18;
2. Remove the pin fig. 24 A.
3. Turn the lever counter-clockwise fig. 25
4. Remove the PTO belt fig. 22.
5. Release the fork fig. 20, pull the deck forward and set it vertical fig. 17, take care not to bend the adjuster cables.
6. Remove the pulley fig. 19 A
7. Take off the cutting deck protection transmission A fig. 36, unscrewing the 4 screws;
8. Unhook the spring A fig. 35;
9. Take off and put the belt rif. B fig. 35, following the schema represented in fig. 35.
PLEASE USE ONLY ORIGINAL BELTS!
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