Daktronics Pro Series Operations and Maintenance Manual - Manual (Page 107)

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LOFT BLOCK MAINTENANCE
The Vortek Loft Block has sealed bearings and
usually needs minimal maintenance but the mounting
hardware should be checked and a few other simple
inspections will suffice.
1. Check for proper torque on the beam clamp bolt
and nut. This should be 17-20 foot/pounds of torque
using a torque wrench to confirm.
2. There are “Circlips” on both sides of the 2 axles
on the loft block. Check to make certain that the clips
are seated in the groove on the axle.
3. Look to see that all of the plastic covers are
snapped into place.
4. The loft block should be free to swing in both a
side to side motion and up/down to a small extent.
TURNBUCKLE MAINTENANCE
Turnbuckle maintenance requires checking the locknuts
to make sure they are tight to prevent the turnbuckle
from loosening or, if your turnbuckles do not have
locknuts then make sure that they are moused.
Also check to assure that the cable drops are plumb
and not angled. The hanger bracket that is attached
to the A-14 Aluminum Batten and the turnbuckle also
should not be bent.
Axle “Circlip”
(check both sides)
3/4 " Hex Nut
Locknuts