Heavy Duty Assisted Lift Trunnion Operation and Maintenance Manual
Form Reference
C64.65546
Issue
5.00
24 of 39
Issue Date
May 2021
The signal shall be aligned to a point on the ground when sighted from the HD
ALT scope fitting point. This includes where CLS LITE or Classic CLS are installed on
a GRP post as they are manufactured with fixed geometry that allows ground sighting
as opposed to sighting in the head
General Notes
The Signal Sighting Form (SSF) will provide the definitive, signal specific alignment details and
should always be consulted prior to commencement of work
The signal should not be aligned to a target board when the sighting scope is fitted onto the
Trunnion. The illustration below shows a representation of the light beam shown in green and
the Alignment scope field of view in yellow, converging at a point on the ground at a distance
determined by the Signal Sighting Form
Fitting the Scope
The removable alignment scope unit should be fitted to the Trunnion by screwing the two
knurled screws into the threaded holes as shown in the illustration below. If a camera and
bracket are to be fitted to the scope for recording purposes then please refer to the instruction
leaflet, part number C65.65569 available on the Unipart Dorman Website.
