Page 11 - ConveyorBeltMaintenanceManual2010

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INSTALLATION, MAINTENANCE & TROUBLESHOOTING GUIDE
i n s t a l l a t i o n
Tilting the troughing idler forward (not over two degrees) in the direction of belt travel produces a self-aligning effect. The idlers
can be tilted in this manner by shimming the rear leg of the idler stand. Here again, this method is not satisfactory where belts
may be reversing. The tilted troughing idler is shown in Fig. 8.
This method has an advantage over knocking idlers in that it will correct for movement of the belt to either side of the idler;
hence, it is useful for training erratic belts. This method has the disadvantage of encouraging accelerated pulley cover wear
due to increased friction on the troughing rolls. It should, therefore, be used as sparingly as possible, especially on higher-
angle idlers.
Special, self-aligning troughing idlers are available to assist in training the belt (Fig. 9). For a more complete discussion of these
idlers, refer to the Goodyear Engineered Products’ “Handbook of Conveyor and Elevator Belting.”
Fig. 7
Perpendicular
To Belt Line
Belt Travel
Over “Knocked” Idler
Adjustment
Fig. 8
2° Maximum
Direction of Travel
Top Idler Stand
Washer
Fig. 9
Typical Self-Aligning Troughing Idler