Grillo MD15 Manual De Instrucciones página 14

MD15-MD18/ Translation of the original instructions
AIR FILTER
Check the air filter every 4 hours, or more frequently if working in a very dusty environment (fig. 8 – fig.8A).
CHECKING THE BLADES AND CUTTING DECK
A blunt blade tears the grass, leaving it unattractive. The cutting edges of both blades must be sharpened. To remove a blade,
take hold of it firmly, wearing work gloves, and unscrew the central screw, remembering that the screw has a right-hand thread
(fig. 9, ref.3). Sharpen both cutting edges using a medium-grain grinding wheel and check that the blade is balanced by
standing it on a round bar inserted in the central hole. Fit the two cutting blades following the diagram (fig. 9).
CAUTION!
Tighten the fixing screw (fig. 9, ref. 3) firmly. Always replace damaged or crooked blades; never attempt to repair them!
ALWAYS USE ORIGINAL BLADES!
TWIN- FUNCTION MOWER DECK
This mower deck has a twin-function: side discharge and mulching. The desired function can be easily selected even during
work thanks to the Quick Shift lever; this allows the user to save time because he must not remove baffles or change the blade
(fig. 27).
ADJUSTING THE CUTTING DECK
Cutting deck levelness is essential in order to obtain an evenly mown lawn. Park the mower on a flat surface and check that the
tyre pressure is correct and then regulate the 4 adjusting nuts (fig. 17 – 17A), so that the edge of the cutting plate is at the same
distance from the floor (25 mm) on both sides, with the operator sitting on board and the cutting deck in the position no. 1 (fig.
18A). If you are unable to level off the deck, contact an Authorised After-Sales Service Centre.
BLADE – ENGINE BELT
If the belt becomes twisted or comes off, make all the checks and adjustments stated below, keeping the deck at the lowest
position. Pay attention when positioning the belt guide; move it towards the belt, checking the deck at the various height settings
(fig 19).
HYDROSTATIC AXLE – ENGINE BELTS
These belts are self-adjusting, therefore they do not require any adjustment. It is sufficient to check the spring tension. To
replace the belts, release the tension spring (fig. 21).
BLADE ROTATION
Rotation is started and stopped using the switch (fig. 1, ref. 5). When rotation is engaged , the engine must be running at
medium rpm and the machine must not be in the grass for cutting. Never start the blades with the engine at maximum rpm. The
machine is equipped with an electromagnetic clutch which also brakes the blade during disengagement. The blades are also
disengaged automatically when the cutting height adjuster lever is moved to the highest position. The blade must stop within 5
seconds: if this is not the case, adjust the 3 nuts of the electromagnetic clutch, placing a 0.3 mm feeler gauge under the brake
plate. N.B. This operation must be carried out by an authorized service centre.
CHANGING THE BELTS
The movement is transmitted from the engine to the hydraulic transmission and to the blades by means of two v-belts. Replace
the belts as soon as they show signs of wear! Their replacement and subsequent adjustment are fairly complex procedures
and must be carried out by an Authorised Service Centre. For cutting deck engine belt, the belt guide beside the deck pulley has
to be removed (fig. 19); release the belt stretcher spring and remove the belt guide (Fig. 21). ALWAYS USE ORIGINAL BELTS!
TRACTION RELEASE LEVER
The traction release device is located at the back of the machine (fig. 22); if the machine breaks down, to allow it to be towed or
moved by hand, move the lever to idle position (fig. 22, ref. B). In the position (A) (fig. 22) the machine is in working condition.
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