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C64.65201 Issue 3
Jun 2019
Signal Husbandry
If the signals require any cleaning to be carried out, the only mediums approved are
water and proprietary detergents.
Do not use any solvent based or abrasive cleaning material as this may
irreparably damage the signal.
Using a lint free cloth moistened with the water detergent solution, carefully wipe
the lens clean and using a dry second cloth remove any water spotting etc.
Service and Repair
The LED modules have no user maintainable elements (apart from general
husbandry requirements) and are intended to be replaced completely should they
fail. A complete list of signal heads, spares and their catalogue numbers are shown
on the Network Rail Approval Certificate.
Module Replacement
Before replacing the module remove any cable ties and disconnect the plug coupler.
With 4 Aspect heads note the position of each module before removal. Elevated
signals will have the RYG module (fitted with the large plug coupler and the top
yellow feeder cable with a small plug coupler) in the lower aperture and the second
yellow only module (fitted with a small plug coupler only) in the upper.
Ground and most tunnel signals are configured as RYG in the top aperture and the
second yellow in the bottom aperture.
Note the position of the plastic module spacers on the pivot bar where fitted.
Support the module to stop it swinging back and release the two locking levers as
shown below
