EMAK Oleo-Mac OM 105J Manuel D'utilisation Et D'entretien page 59

Machines 110:
► The mowing deck drive belt is correctly tensioned when the length of the tensioning spring (2) is 135±1 mm. If the
length is different, adjust it by turning nut (1) of the tensioning draw bar.
6.3.9d
6.3.10 MOWING DECK - REMOVING IT FROM THE MACHINE
► Set the mowing deck to the highest position by moving the elevation adjustment lever to position 7.
► Slightly lift up the grass ejection chute (1) and slide it off the two pins welded to the frame of the mowing deck. Then
either move the chute approx. 10 cm backwards and secure it in place, or completely take it out through the rear
6.3.10a
plate.
► Using an appropriate wrench, turn nut (2) so that the tension on the spring (3) is completely released. Then remove
the belt (1) from the belt pulley of the electromagnetic engine transmission.
6.3.10b
► Slide the spring pins (4) from both the rear mowing deck suspension shaft pins (5). Screw out the nut (6) from the
front shaft pin and pull out the shaft pin (7). Using pliers, slide out both pins (5). For the the mowing deck mulching
6.3.10c
option, first remove the part of the mulching flap lever that extends above the floor of the mower.
► Slowly pull out the mowing deck to one side of the mower.
6.3.10d
6.3.11 MAINTENANCE OF STEERING
Regularly check that there is not excessive looseness between the cogged steering segment and the steering wheel
pinion. If higher looseness is identified, it is necessary to limit it. Procedure for limiting (adjusting) looseness:
► Lift the hood.
► Loosen two nuts M12 (1) on the bolt of the eccentric.
6.3.11
► Place a suitable wrench on to the hexagon of the eccentric (2) and turn it until looseness is limited to a minimum.
► Tighten both nuts M12 (1) using a torque of 35 - 45 Nm.
Neglecting this maintenance may result in damage to steering components.
6.3.12 CHECKING AND ADJUSTING THE TRAVEL DRIVE BELT
Regularly check the tension of the travel drive belt. The belt is correctly tensioned when a force of 4 kPa acting on the
middle distance between the belt pulleys (1) and (3) results in the belt bending by approximately 1.5 cm.
When the amount of deflection increases, it is necessary to adjust the tension.
Positions in the picture are:
(1) Engine belt pulley
6.3.12a
(2) Guide belt pulley
(3) Tensioning belt pulley
(4) Transmission belt pulley
To measure force you can use a standard mechanical dynamometer available in stores selling such products.
Adjust the tension of the belt by tightening nut (6) so that the spring (5) is stretched to a length of 95±1 mm.
6.3.12b
Do not over-tension the belt above this level, this will reduce its lifetime and may also cause damage to the transmission!
6.3.13 REPLACING BELTS
Replacing the drive belts is a relatively demanding operation, which needs to performed by an authorised service centre.
6.3.14 REPLACING WHEELS
Before replacing one of the wheels, park the mower on a horizontal and rigid surface, turn off the engine and remove the key from
the ignition. Perform the replacement as follows:
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