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31
Maintenance
01.4IB.50023A
Do NOT use compressed air to clean the
device. This may result in loose dirt or grit
being blown into bearings or other critical
parts and causing excessive wear.
!
CAUTION
Either use a vacuum cleaner or wipe with a
dry lint-free cloth or industrial-type wiper.
Primary insulation, including the insulating
support plates on which the selector
switch and grounding switch contacts are
mounted and the operating rods, should
also be cleaned. Wipe clean with a dry
lint-free cloth or an industrial-type wiper.
If dirt adheres and will not come off by
wiping, remove it with distilled water or a
mild solvent such as denatured alcohol. Be
sure that the ground and test device is dry
before returning it to service. Do not use
any type of detergent to wash the surface
of the insulators, as the detergent may
leave an electrical conducting residue on
the surface as it dries.
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1) Mechanical Operation
Remove the upper portion of the front
cover of the ground and test device.
Make a careful visual inspection of
the mechanism for loose, damaged or
excessively worn parts. Operate the
grounding switch several times. Operate
the levering-in mechanism through one
or two complete cycles and check for
smoothness of operation.
2) Lubrication
Lubricate the mechanism and other
specified parts in accordance with the
lubrication chart,
.
The chart shows the location of all surfaces
which should be lubricated together with
the type of lubricant and the method of
application. The guiding rule in lubrication
should be to lubricate regularly, use
lubricant sparingly and remove all excess
lubricant.
Rheolube 368A should be lightly applied to
those bearing surfaces which are accessible
and a light synthetic machine oil such as
Anderol A456 should be used to penetrate
through to surfaces which are inaccessible.
There is no necessity to disassemble
the mechanism for lubrication. Tilting
the device will facilitate the entry of the
lubricant to the bearing surfaces.
3) Mechanism Adjustments
There are several factory adjustments in the
mechanism which are described below. No
adjustment of these settings is required for
routine maintenance, but they may need
to be adjusted after major overhaul or
removal of the mechanism. Do not adjust
these settings unnecessarily.
