Grillo FD 280 Manuel D'utilisation page 15

FD280/ Translation of the original instructions
DIFFERENTIAL LOCK
Please keep the chains and the coupling lubricated with grease (fig. 7 ref. B). Adjust the device cable, so that
the skid does not force against the coupling walls, when the lock is not engaged.
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.
Remove the mower deck then proceed as follows (fig. 26):
1) Remove the guard above the deck by unscrewing the two screws (fig. 18).
2) Remove the pin (fig. 24A).
3) Turn the lever anti-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 recommended to open the grass catcher and take off the charge channel (fig. 33). Wear-out blades lose
their cutting efficiency and tend to become unbalanced, causing the mower to vibrates. If the unbalance persists
even after sharpening, check the balance by inserting a screwdriver in the hole at 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 worn-out 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, ref. A) with the
one which is located on the machine, between the wheels, in the centre (fig. 37 ref. 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 and check the float spring tension. If a satisfactory parallel set-up cannot be achieved,
adjust the register (fig. 21). To adjust the mowing height, set the lever (n°6 fig. 1) on the lowest position, fit two
30 mm shims at the sides under the edge of the deck, and set the wire (fig. 24, ref. 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 both the tension springs (ref. 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. 24A)
3) Turn the lever anti-clockwise (fig. 25)
4) Remove the PTO belt (fig. 22)
5) When refitting the belt (fig. 19), make it completely pass through the bulkhead of the hydrostatic axle (fig. 38).
The PTO belt is self-adjusting.
DECK BELT
This belt is a A-A double-section special belt; it allows the blades contra-rotation. The belt tension is self-
adjusting thanks to the spring (A, fig. 35). The spring must have 130 mm length (coils length).
To replace the cutting deck belt, please follow this procedure:
1. Remove the cutting deck cover unscrewing the two screws (fig. 18)
2. Remove the pin (fig. 24A)
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