FlexLink X45 (43 мм) Тех. обслуживание - Manual (Page 10)

10 Maintenance
Inspection – conveyor chains (continued)
Important:
The chain should therefore be pre-tensioned while the
conveyor is stationary, but must never be so tight that
there is no slack during operation. There should be no
appreciable slack on the chain when the conveyor is sta-
tionary. This can, however, vary depending on the total
length of the chain. If there is too much slack, there will be
excessive wear on the chain guides and the chain. This
could be a risk for injury.
If the slack on the conveyor chain is unacceptably
high, it must be shortened by splitting the chain and
removing the necessary number of links. See “Shorten-
ing conveyor chains” on page 10.
If the conveyor has a guided drive unit with no chain
slack take up, the elongation of the chain has to be mon-
itored even more carefully, to ensure a trouble free oper-
ation.
Shortening conveyor chains
The most suitable place to shorten the chain is at the
drive unit.
Alternatively:
• at a beam section for chain installation which has
detachable sections.
• by removing the side plates of the drive or idler end
unit in closed systems.
• at a wheel bend by removing the outer curve.
• at a conveyor beam section for liftable chain (if there is
any).
Instructions
1 Make the conveyor chain accessible at some of the
overhead positions.
2 Remove the steel pin (1) from the pivot (2). Use the
pin insertion tool (see figure).
3 Remove the necessary number of links.
Note. With cleated or friction chains, pay attention to
the divisions between the links.
4 Join the chain together with a new pivot.
Note. The old pivot should not be re-used. When the
chain is divided, a new pivot must always be fitted.
5 Insert the steel pin using the pin insertion tool.
6 After inserting the steel pin, check that it is centered
and that the chain easily bends in the fitted link.
The conveyor chain must show some slack during
operation.
The conveyor chain does not need to show any slack
when the conveyor chain is stationary.
Beam section for chain installation
Chain joint components
Usage of pin insertion tool