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Belt tension of hydrostatic drive (black belt)
• If the belt starts to make a squeaking sound or if the resistance on the operation lever is
too low, then this is a sign that the belt tensioning roller needs to be adjusted.
• The back plate of the machine must be removed in order to access the hydrostat’s speed
control belts. These 10 bolts can be loosened with an Allen key number 4.
• The required belt tension is obtained when, if the corresponding operation lever is held
at a distance of around 20mm from its maximum position, the tensioning roller already
presses against the belts and begins to pull on the spring.
• If this is less than 20 mm, then the force of pressure from the tensioning roller will need to
increase by adjusting the length of the starter cord.
• Check to ensure that the distance between the turns of the tension spring when the lever
is in an idling position is 0.5mm.
11.4.3.5
Replacing belts
• As with every other aspect of maintenance, you must turn the engine off and remove the
key from the ignition.
• Check to ensure that the distance between the turns of the tension spring when the lever
is in an idling position is 0.5mm.
Cutter drive belt tension
• Loosen both belt catchers by unscrewing the M8 bolt (spanner size 13) so that the belt
holder can be tilted aside.
• Replace the belts with belts of a similar type and length. (type xxx)
• The cutter should not turn if the lever is in its idling position (not powered). For more infor
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mation about adjusting, you are referred to § 11.4.3.4.
• After putting the belts back on, the belt catcher needs to be replaced so as to prevent the
belts from coming off when decoupling. They should be put on such that there is about
5mm remaining between the pulley and belt catcher.
