Hydraulic Motors; Sharpening The Blades - Grillo FD 300 BEE FLY Gebrauchs- Und Wartungsanleitung

HYDRAULIC MOTORS

Check the level in the expansion vessel with the engine cold, it must be up to the level marker (fig. 14); if more oil
is needed, add OSO 68 (ISO L-HM68) or MOBIL DTE 18M.
Clean the cooling fins on the hydraulic motors regularly; in summer, under dusty conditions, every 2 working hours.
CAUTION!!
Change the oil in the hydraulic motors every 300 hours; check the level with the motors cold, it must be up to the first
marker on the expansion vessel (fig. 14). If the oil needs topping up, use MOBIL DTE 18M, or OSO 68 (ISO L-HM68).
The oil must be changed before the 300 hours if:
1) the oil is black (the engine has overheated);
2) the oil is a whitish colour (it is contaminated with water);
3) there is black coloured residue on the bottom of the vessel (partial oil deterioration).
To remove the oil undo the drain plug under the hydrostatic transmission. To add oil, as this is a slow operation
due to the filter inside the vessel, this can be done much more quickly by turning the pulley by hand; unscrew the
top plug by the side of the vessel (fig. 15) to allow any air bubbles to escape. Capacity: 0.8 lt. each.
PTO TRANSMISSION
AGIP SYNTHETIC LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2), 0.15 lt., change every 200 hours
use an oil-suction syringe for this operation (fig. 16).
HYDRAULIC KIT CIRCUIT
Hydraulic oil OSO 32 (ISO L-FD 32), 2 lt., (fig. 17) the filter is inside the tank, change the oil every 500 hours.
HYDRAULIC KIT CIRCUIT WITH HIGH DISCHARGE
Hydraulic oil OSO 32 (ISO L-FD 32), 4 lt., (fig. 18) the filter is inside the tank, change the oil every 500 hours.
110 CM CUTTING DECK TRANSMISSIONS
AGIP SYNTHETIC LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2), 0.6 lt., change every 300 hours.
126 CM CUTTING DECK TRANSMISSIONS
AGIP SYNTHETIC LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2), 1.350 lt., change every 300 hours.
150 CM CUTTING DECK TRANSMISSION
Side discharge AGIP SYNTHETIC LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2), 0.15 lt., change every 200
hours (B, fig. 36).

SHARPENING THE BLADES

A blunt blade pulls at the grass giving it an unsightly appearance, the cutting edges of the blades must therefore
be kept sharp at all times.
For 110 cm and 126 cm decks, remove the split pins and side pins (fig. 19). Lift up the deck by hand and affix it
securely to the hook on the instrument panel (fig. 20), sharpen the blades, replace them if they appear worn.
As the blades wear they lose their cutting efficiency and tend to become unbalanced, causing the lawnmower to vibrate,
if even when they are sharpened this unbalancing still remains; their balance should be checked by putting a screwdriver
into the centre hole on the blade and grinding until the blade remains horizontal and therefore "balanced".
To remove a blade hold it firmly using safety gloves and undo the centre screw. Caution: the right blade centre fixing
screw has a left-handed thread (fig. 21).
With these two decks the universal joint does not need to be released, however, before starting the machine it is
still a good idea to make sure the joint is securely fixed and the stop button is protruding.
CAUTION!
Always replace damaged or bent blades; never try to repair them!
ALWAYS USE ORIGINAL BLADES!
ADJUSTING THE CUTTING DECK
An even deck is essential for achieving a uniform cut over the whole lawn.
With the lawnmower on a flat surface, check the tyre pressures, check the tension on the two floating springs, and
if necessary use the screws to adjust them (fig. 22).
If a satisfactory parallel set up cannot be achieved, contact an Authorised Service Centre.
The two floating springs also give greater traction to the drive wheels, especially on a slope.
To remove the deck from the mower, undo the two pins (fig. 23) and pull forward the whole cutting assembly.
Caution! When refitting the deck always remember to reconnect the universal joint.
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