The maintenance schedule for any conveyor can be divided into three stages:
1. Belt shut down and empty
2. Belt running empty
3. Belt running loaded
(i) Belt Shut Down and Empty
This is the 1st step in inspect the conveyor belt because this allows the opportunity to check any damage to the belt or splice. The conveyor should be locked out while making this inspection.
Rubber belt damage should be repaired using the hot vulcanized repair method or the cold repair method. Belt fabrics that are exposed to the weather or to product contamination should be properly cleaned, dried then covered with new rubber. These repairs are critical to prevent moisture from penetrating the belt and breaking down the cover adhesions and to prevent product contamination from abrading the carcass and also breaking down the adhesions.
The splice can also be inspected and if damage in the splice is visible, it is suggested that the splice be repaired or replaced. This is also a good time to walk the conveyor and check the following components.
A) Tail Pulley free from build-up and trapped material
B) Tail Pulley damage
C) Skirting in the loading area
D) Impact Bed or Impact Idler damage
E) Slider Bed clean and smooth
F) Carrying Side Idler damage
G) Carrying Side Self Trainers (operational and not tied off)
H) Secondary Loading Stations (skirting, impact bed or impact idler damage)
I) Tripper Frame damage
J) Tripper Discharge Pulley – clean
K) Tripper Bend Pulleys – clean
L) Head Pulley and/or Drive Pulley (clean, check for worn lagging, re-lag Drive Pulley if rubber is old, worn, smooth and hard)
M) Head Pulley cleaner or scraper – operational
N) Head Pulley Snub – clean
O) Return Idlers – clean and turning freely
P) Bend Pulley – celan
Q) Take-up – clean
R) Return Side Self Trainers – operational and not tied off
S) Damage to return side frame due to mistraining
T) Plow or Scraper in front of Tail Pulley – operational.
The preceding list should be used as a guide when inspecting the conveyor while it is empty and shut down. Numerous items in the preceding list contained the words “clean or operational”. Pulleys or idlers that have build up on them will cause tracking problems. The same can be said for pulleys that have some of the rubber lagging worn off.
Scrapers, plows and self-trainers must be operational to perform their tasks. Belt damage, pulley damage and tracking problems will result if these accessory pieces of hardware are not well maintained.
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