Hydraulic Engines - Grillo FM13.09 Uso Y Mantenimiento

If the radiator protection grids are obstructed and the cooling fluid and the hydraulic oil temperature gets over 88° C,
a sensor automatically inverts the direction of rotation of the fan for a few minutes in order to clean the grids. This
operation can also be made by hand, working for a few second the fan inverter button (fig. 1 n° 25). To check and
clean the radiator fan, remove the pin (fig. 15, ref. A).
RADIATOR REFILLING AND RESPECTIVE BLEED
Caution! Danger: hot liquid under pressure.
In order to let the engine cool down correctly, there should be no air in the cooling circuit. Make sure that the
clamps on the water muffs are well tight and that no air can get into the circuit from the outside.
Make the air bleed in the following way:
1) Caution! For this operation always wear suitable working gloves.
2) Start the engine and bring it to working temperature (to make sure the engine thermostatic valve is open).
3) With the engine at minimum, open the engine cooling liquid refilling bowl on the right side of the driving seat
(fig. 7).
4) Unscrew the screw for the bleed on the upper part of the radiator (fig. 15, ref. C).
5) With the screw open, accelerate to medium speed and reduce the speed several times until only liquid comes
out.
6) Tighten the screw.
7) Accelerate again for some minutes.
8) Unscrew the bleed screw again and repeat the steps 5-6-7 four or five times until only liquid comes out.
9) At the end, re-establish the liquid level in the bowl and close the lid.
ELECTRO-HYDRAULIC DISTRIBUTOR
The electro-hydraulic distributor (fig. 16) consists in three blocks held together with three tie rods with nuts (fig. 16,
ref. A) whose grip is 3.6 N/m. If this grip is not kept, the distributor will block.

HYDRAULIC ENGINES

Check the level in the reservoir with cold engines (fig. 4). If more oil is needed, add hydraulic oil OSO 46 (total
quantity: 20 litres). Make this control periodically.
Caution! Change the hydraulic oil in the hydraulic engines the first time after 500 hours and then every 1000 hours.
The oil must be changed before the 500 hours if:
- the oil is black;
the oil has a whitish colour (it is contaminated with water);
-
there is black coloured residue (partial oil deterioration).
-
To remove the oil undo the lower oil reservoir drain plug (fig. 18). To fill it in, unscrew the upper lid (fig. 16, ref. B).
Pay attention to possible impurities, which may obstruct the circuit, causing serious problems to your machine.
When you change the hydraulic oil, you must also change the oil filter (fig. 19); pay attention to the filtration level. A
service indicator on the filter support signals when the filter must replaced (fig.19, ref. A).
Do not increase the wheels towing hydraulic system pressure over 250 bar; the hydraulic pump and the hydrostatic
engine on the wheels may be damaged.
160 cm LMP CUTTING DECK GEAR BOXES
Use synthetic oil LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2), 1.550 litres, to be changed every 300 hours.
The oil level lid is positioned over the gear boxes (fig. 32).
If you notice any loss, check and change the oil guards to avoid the deterioration of the entire transmission.
EMERGENCY AND PARKING BRAKE
The FM13.09 machine traction is based on hydraulic engines, therefore for braking you only have to release the
feed and reverse gear pedals (fig. 1 n° 1 and 2). The brake pedal (fig. n° 3) has to be used only in case of
emergency. To engage the parking brake, press the emergency brake (fig. 1 n° 3) and then put in the blocking with
the pedal (fig. 1 n° 5). To release the parking brake just press again the emergency brake (fig. 1 n° 3).
SHARPENING THE BLADES
For the cutting deck check and maintenance proceed as follows:
1) lift the cutting deck hydraulically;
2) release the two side shock absorber (fig. 21);
3) lift the cutting deck by hand and hitch it with the special lever (fig. 10).
You do not need to release the universal joint. Before starting the machine, make you sure that the universal joint is
well connected and that the stop push button is protruding.
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. As the blades wear they lose their cutting efficiency and tend to become unbalanced,
causing the lawnmower to vibrate; sharpen both blades uniformly.
When you replace the blades, it is compulsory to replace also the screw and the nut (fig. 11).
To remove a blade, hold it firmly using safety gloves and unscrew the fixing plate and the central screw.
Caution! Always replace damaged or bent blades; never try to repair them! ALWAYS USE ORIGINAL BLADES!
Translation of the original instructions
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