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35
Maintenance
01.4IB.50026A
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
Powell offers a complete lubrication kit
(Powlube-104) which contains all the
lubricants required for maintaining the
ground and test devices. Powlube-104
consists of (1) A-grease, (1) B-grease, and
(1) C-oil. Prior to March 2014, Powell
provided Powlube-101 and Powlube-102
which contained (1) tube of Anderol 757 or
Rheolube 368A, (1) tube of Mobilgrease 28
and (1) bottle of Anderol A456 oil.
A-Grease should be lightly applied to
those bearing surfaces that are accessible.
Inaccessible surfaces, such as bearings, may
be lubricated with a light synthetic machine
oil such as C-Oil. B-Grease should be
applied to the electrical contact surfaces.
Lubricate the stored energy mechanism
and other specified parts in accordance
. See Figure 25 for
labeled lubrication photographs.
lists the location of all
surfaces that should be lubricated, the type
of lubricant to be used, and the method of
applying the lubricant. The guiding rule
in lubrication is to lubricate regularly, use
lubricant sparingly and remove all excess
lubricant. Tilting the ground and test
device will enable the lubricant to cover the
bearing surfaces.
