Part N
umber
6410T0006
Version 4/23/2010
26
Here’s a wire rope that has jumped a sheave. The rope “
curled
” as it went
over the edge of the sheave. When you study the wires, you’ll see two
types of breaks here: tensile “cup and cone” breaks and shear breaks that
appear to have been cut on an angle.
Drum crushing
is caused by small drums, high loads and multiple
winding conditions.
PULLEY INSPECTION
Check the cable pulleys for excessive wear on the inside of the groove. The cable should not be wearing
on the insides of the pulleys. If there is excessive wear then there may be a pulley misalignment. The
misalignment should be corrected and the pulleys replaced.
CABLE DRUM INSPECTION
Check the cable drums for excessive wear. The grooves on the cable drums should be well defined and
deep enough so the cable tracks in the grooves and does not overlap on itself.
If the grooves are worn to the extent they do not retain the cable then the cable drums should be replaced.
SELF-REPAIRING DEVICE™ BOTTOM BEAM TYPE
Optional; a steel cable remains attached to the bottom beam allowing it to swing away if struck.
The tension on the cable will automatically pull the bottom beam back into place.
NOTE
SITUATIONS MAY ARISE WHERE THE DOOR FABRIC HAS NOT COMPLETELY RESET
INTO THE SIDE FRAMES AFTER THE DOOR HAS BEEN IMPACTED OR PUSHED. IT
THIS CIRCUMSTANCE, SIMPLY GRAB HOLD OF THE FABRIC BY HAND AND PULL (OR
PUSH)
UNTIL IT IS COMPLETELY SEATED INSIDE THE SIDE FRAMES.
Summary of Contents for RAPID-ROLL 570
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