Changing The Belts - Grillo MD22 Manual De Instrucciones

MAINTAINANCE 110MP CUTTING DECK
To ensure the deck belt works properly and to have a uniform cut, please follow these instructions:
– put the cutting deck in its lowest position.
– adjust the front arms fig. 34 in order to set the front part of the cutting deck at 35 mm from the ground
(fig. 28): you have to measure the point A as indicated (fig. 29).
– regulate the adjusting device (fig. 35) in order to set the rear part of the cutting deck at 35 mm from the
ground (fig. 30): you have to measure the point B as indicated (fig. 29).
To check the cutting deck belt you have to unscrew the knob D in fig. 31 and remove the two protections.
If you see that the length of the belt has changed, resulting in malfunctioning, you can regulate the belt
tension using the adjusting screw (fig. 32). If you want to replace the belt, please follow the fig. 33 to re-
assemble it. The spring has to be adjusted at 86 mm and it is indicated by the red arrow (fig. 32B). The
stretcher has to be lubricated every 50 working hours (fig. 32/C).
ENGINE BELT – CUTTING DECK BLADE
The engine – blade belt is self-adjusting. Therefore no adjustment is required. Simply check the spring
tension (fig. 15). Check that during operation the belt I always in the centre of the stretcher (fig. 15, ref.
A). The stretcher has to stick about 5/8 mm out of the frame (fig. 24). To replace the belt remove the
spring (fig. 15, ref. B)
ENGINE – HYDROSTATIC TRANSMISSION BELT
Whenever there is a change in belt length (causing therefore its malfunctioning), the tension can be
regulated by means of the adjustment device (fig. 16). Take care not to compress the spring beneath the
unit completely; belts must be neither too tight nor slack. The spring must be kept set at 44 mm (fig. 16).
BLADE ROTATION
Rotation is started and stopped using the switch (fig. 1, no. 1). When rotation is engaged , the engine
must be running at medium r.p.m (see throttle sticker) 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.
disengaged automatically when the cutting height adjuster lever is moved to the highest position.

CHANGING THE BELTS

The movement is transmitted from the motor to the hydraulic transmission and to the blades by means of
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 After-Sales Service
Centre. For the two transmission and hydraulic engine belts proceeds as follows:
-remove the rear and top grids
-undo the belt stretcher nut (fig. 15)
ALWAYS USE ORIGINAL BELTS!
TRACTION RELEASE LEVER
The traction release device is located behind the seat; if the machine breaks down, to allow it to be
towed or moved by hand, move the lever outward (fig. 20A). In the position (fig. 20B) the machine is in
working condition. Check that during working the hydraulic engine piston does not remain pressed down;
if necessary, adjust the nut (fig. 21).
DIFFERENTIAL LOCK ADJUSTMENT
The differential lock has to be activated when the pedal is half way of its travel (fig. 8). To adjust the
activation point of the differential lock use the screw (fig. 9).
MD22/ Translation of the original instructions
12 10 11
The blades are also