FlexLink Spiral Elevator - Manual (Page 51)

Technical maintenance
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Page 45 of 68 5478EN-3
Procedure to check chain stretch
• Make sure that the main switch has been switched off, and safely
isolated.
• At a position on the idler or drive end of the Spiral Elevator, stretch
at least 8 conveyor chain plate links apart.
• Measure the distance between the start of plate 1 and the start of
slat 8 (i.e. the pitch across 7 conveyor chain plates - see picture).
For a new chain this distance is 267 mm [10,5"].
• The maximum allowed chain stretch is 1.5%.
• Therefore the metal chain must be replaced when the measured
distance is more than 271 mm [10,67"].
• Refer to section 8 for spare part numbers and contact FlexLink to
procure the necessary parts.
Figure 11 Tape measure on conveyor chain
.
Note! If more than 1.5% of the original number of conveyor chain
plate links have been removed to correct chain tension, then this
indicates that the overall chain is in need of replacement..
Nominal 267 mm, Maximum 271 mm