Page 29
General Machine Products (KT), LLC
18.0 Duct Integrity and Duct Lubrication
This is entirely the responsibility of the operator.
To be sure that the duct into which the cable is to be inserted is installed appropriately, it is recommended
that its integrity and lubrication be checked.
Check that the duct is:
1.
Not blocked
2.
Not squashed
3.
Continuous (i.e. it has not been fractured somewhere along its route and the fractured ends separated)
4.
Also check that any joints are pressure tight
5.
Finally check that the duct is appropriately lubricated.
The easiest and most straightforward way to complete these checks is to set the machine up for a normal
cable insertion but fit a seal plug in place of the cable. The duct can then be pressurised without running
the belt drive.
CAUTION: ANY OBJECT INADVERTENTLY LEFT IN THE DUCT DURING THE DUCT LAYING
MAY BE EXPELLED FROM THE END OF THE DUCT WITH HIGH FORCE AND VELOCITY. IT
IS IMPERATIVE THAT NO PERSONNEL BE IN THE VICINITY OF THE END OF THE DUCT
AND THAT A SUITABLE DEVICE IS FITTED TO THE END OF THE DUCT TO ARREST ANY
EXPELLED OBJECT.
The checks listed at 1
-
4 (inclusive) above may all be carried out at the same time using one check. The
procedure is outlined below. Set up the air box and duct clamp with plug inserted as shown below and
close duct clamp. Tighten the thumbnut. Close the airbox lid and tighten the (2) thumbnuts.
