Millwright- Conveyors
Study online at https://quizlet.com/_91wltj
1. Entire belt runs off at all points of the Belt is strained or elongated excessively on one
line side
If belt is new allow time break in, if it is not new or
does not break in properly cut out strained section
and splice in new section
2. The belt looks hard and has excessive Excessive heat, may need to change to excessive
cracks what could be the cause? heat belt
3. You notice separation of top cover Chemical or oil in load, breaker strip is definitely in-
what could be the cause? adequate or even missing, abrasive material hitting
cover or the pulleys are too small.
4. The entire belt is improperly spliced or Resplice
out of square, one section of the belt
runs off at all points on the line. What
is the correction?
5. The belt is running off tail pulley be- Realign conveyor structure or head shaft
cause shaft may not be square with
the center line of the conveyor. How Worn pully lagging can be replaced
would you correct? realign idlers ahead of head pully
6. The tripper teack gauge is too large Reduce the tripper track gauge and realign pulleys
for the wheels, pulling the tripper out
of square with the belt. belt wears
against tripper frame.
7. If there is insufficent traction between Use grooved lagging
the belt and pulley you could increase
the wrap using a snub pulley, use
lagged pulleys, install proper cleaning
1/7
, Millwright- Conveyors
Study online at https://quizlet.com/_91wltj
devices on belts and install centrifugal
switch for safety. If it is in wet condi-
tions would help?
8. The belt slips on start up and you find Increase counter weight or increase screw take up
that the counter weights are to light. tension
How is this problem corrected?
9. You find that the counter weights are Recalculate the counter weight required or reduce
too heavy and the belt is excessively take up tension to the point of slip, then tighten
stretching. What is the correct action? slowly
10. The belt is excessively stretching, this Refer to engineering department and correct, find
may be caused by different rim speeds belt that is designed for specific conditions
on tandem pulleys or permeation of
carcass by chemicals, oils or acids.
Corrective action?
11. The belt breaks at or near the fasten- material buildup on pulleys, or excessing impact
ers and they tear loose. The corrective on fasteners. The copunterweights could be too
action is to install cleaning devices and heavy or the rim speed on tandems are at different
improve maintenance. What was the speeds. there is excessive tension and you may
cause? need to use vulcanize splices
12. Material is falling between belt and First off m,ake sure the skirt is proper and remove
pulley causing belt to break near the accumulation, the maintenance must be improved
fasteners and they tear loose. What and we may need larger diameter pullys if they are
can we check to correct? too small. Lastly let make sure we are using the
correct fasteners
13. If there is excessive heat and the fas- Use vulcanized splices and a belt designed for hot
teners have poor holding ability you material
may need to?
2/7
Study online at https://quizlet.com/_91wltj
1. Entire belt runs off at all points of the Belt is strained or elongated excessively on one
line side
If belt is new allow time break in, if it is not new or
does not break in properly cut out strained section
and splice in new section
2. The belt looks hard and has excessive Excessive heat, may need to change to excessive
cracks what could be the cause? heat belt
3. You notice separation of top cover Chemical or oil in load, breaker strip is definitely in-
what could be the cause? adequate or even missing, abrasive material hitting
cover or the pulleys are too small.
4. The entire belt is improperly spliced or Resplice
out of square, one section of the belt
runs off at all points on the line. What
is the correction?
5. The belt is running off tail pulley be- Realign conveyor structure or head shaft
cause shaft may not be square with
the center line of the conveyor. How Worn pully lagging can be replaced
would you correct? realign idlers ahead of head pully
6. The tripper teack gauge is too large Reduce the tripper track gauge and realign pulleys
for the wheels, pulling the tripper out
of square with the belt. belt wears
against tripper frame.
7. If there is insufficent traction between Use grooved lagging
the belt and pulley you could increase
the wrap using a snub pulley, use
lagged pulleys, install proper cleaning
1/7
, Millwright- Conveyors
Study online at https://quizlet.com/_91wltj
devices on belts and install centrifugal
switch for safety. If it is in wet condi-
tions would help?
8. The belt slips on start up and you find Increase counter weight or increase screw take up
that the counter weights are to light. tension
How is this problem corrected?
9. You find that the counter weights are Recalculate the counter weight required or reduce
too heavy and the belt is excessively take up tension to the point of slip, then tighten
stretching. What is the correct action? slowly
10. The belt is excessively stretching, this Refer to engineering department and correct, find
may be caused by different rim speeds belt that is designed for specific conditions
on tandem pulleys or permeation of
carcass by chemicals, oils or acids.
Corrective action?
11. The belt breaks at or near the fasten- material buildup on pulleys, or excessing impact
ers and they tear loose. The corrective on fasteners. The copunterweights could be too
action is to install cleaning devices and heavy or the rim speed on tandems are at different
improve maintenance. What was the speeds. there is excessive tension and you may
cause? need to use vulcanize splices
12. Material is falling between belt and First off m,ake sure the skirt is proper and remove
pulley causing belt to break near the accumulation, the maintenance must be improved
fasteners and they tear loose. What and we may need larger diameter pullys if they are
can we check to correct? too small. Lastly let make sure we are using the
correct fasteners
13. If there is excessive heat and the fas- Use vulcanized splices and a belt designed for hot
teners have poor holding ability you material
may need to?
2/7
