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3.
At the discharge end of the conveyor, find the belt scraper weight tensioner. Remove
the weight(s) from the belt scraper arm and let the belt scraper swing down away
from the belt.
Skirtboard removal or adjustment is not normally necessary to perform belt
Note:
removal or installation, nor is it recommended. On corrugated belts the skirtbaords
are designed to hang on a pivot, out of the way without full removal.
4.
Remove support posts on the access site.
5.
From the access side of the feeder at the discharge end, grab the edge of the belt on
the top and bottom. Gently pull the belt over the side rail, making sure that the
leading edge of the belt does not catch on the side rail.
6.
Now repeat Steps 4 and 5 on the inlet end of the feeder. Again, be careful not to cut
or scrape the belt on the side rail.
7.
When both ends have been pulled to the outside of the side rail, you may grab the
belt in the middle and slowly remove the belt. As the belt is removed, mark the
direction the belt was rotating. This mark will allow you to re-install the belt in the
same direction. Take care when storing the belt to prevent kinks or other damage.
8.
With the belt removed, inspect the feeder for material build up, lodged particles, and
signs of wear, paying close attention to the weigh section. Take care when cleaning
the weigh section area, as 25 lbs. (or less) pressure placed on the weighbridge
could cause load cell damage.
9.
Reverse steps 1-7 to re-install the same belt.
On a new replacement belt, there may be an arrow printed on the underside of
Note:
the belt. This arrow indicates what direction the belt should rotate when it is installed.
If there is no arrow, rotation of the belt may be in either direction. Whenever a new
belt is installed, perform the belt tracking procedure (see
Belt Tension
The ideal belt tension for any weighfeeder is just enough tension to prevent the belt from
slipping on the drive pulley. The tension minimizes the effect of the belt on weighing
accuracy. Often, the cause of an inaccurate weighfeeder is excessive belt tension.
Specific belt tension cannot be given because the weighfeeder could be mounted in
various applications. As a general guideline, the bottom of the belt should droop 1-2" over
the length of the weighfeeder. This is only an approximate specification, as your
application may require more or less tension due to varying belt loading and other
operating characteristics.
Belt Tracking
1.
Before attempting to track the belt, be sure:
• belt scraper is in place
• belt tension is near guidelines suggested on page 12
• feeder is level and true
Page 12
SITRANS WW300 - OPERATING INSTRUCTIONS
(for self steering units the belt will track itself)
Belt Tracking
on page 12).
7ML19985MQ01
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