Cracks of this type will weaken the back of the belt producing
hundreds of fatigue points which will lead to ultimate belt break. The cause of extreme temperatures can be on
opposite scales. TOO COLD. During very bad weather conditions where temperatures fall below 0°C the belt can become rigid
and less pliable. Rotating a frozen belt will initiate belt cracks. TOO HOT. Normally associated with friction due to seized/or seizing idler pulleys. Heat obviously work hardens
the rubber backing inducing a brittle skin.
ACTION:
In all instances, be it hot or cold failures, it pays to play
safe and renew belt idler pulleys.
OIL CONTAMINATION
FEATURES:
Belt visually oily/greasy.
CAUSES:
Oil leaks.
GENERAL:
Oil seal leakage will centrifuge oil onto the belt. Dust and
particle contamination will form a sticky residue. Rubber may become swollen and the teeth fabric will lose its
adhesion and begin to delaminate. Belt's tensile properties will be lost and failure will result.
ACTION:
Cure any oil leaks and check at regular intervals.
