PRONAR T130, Operator'S Manual

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5.15
Work connected with the repair, change or regeneration of system elements (hydraulic
motors, conduit connections, check valve, flow regulator, hydraulic conduits etc.) should be
entrusted to specialist establishments, having the appropriate technology and qualifications
for this type of work.
5.7 ADJUSTMENT OF CONVEYOR BELT TENSION
Adjustment of conveyor belt tension should be performed if decrease in spreading
mechanism efficiency is noticeable when flow regulator setting is unchanged. In such cases
the conveyor belt slips considerably while moving over driving roller of the drive mechanism.
Consequently, the conveyor belt wears faster and may be completely broken.
FIG. 5.8A Adjustment of conveyor belt tension
(1) bearing mechanism, (2) tensioning bolt, (3) adjustment nut
The conveyor belt should be tensioned symmetrically in such a manner as to ensure that
difference between distances (a) measured from the roller axis to the front part of bracket, on
both sides of the sand spreader, is not larger than 5 mm. Nuts (3) of the tightening
mechanism are located on the front wall of the load box. When the nut is turned clockwise,
bearing assembly (1) moves towards the front wall and tightens the conveyor belt. The length
of protruding end of tensioning bolt (2) should be the same on the left and right side of the
sand spreader. Equal lengths of protruding bolt ends indicate that the conveyor belt is
tightened symmetrically.