Ch 7 Maintenance
A. r
ecoMMended
M
AIntenAnce
The following operations should be performed
at each maintenance check:
• Perform a visual inspection of the device.
Check for loose or damaged parts.
• Perform the operation as described in
Ch 5 Mechanical Checks and Adjustments
• Check the Wipe and Gap as described in
Ch 5 Mechanical Checks and Adjustments
.
• Check the erosion indication as described in
Ch 5 Mechanical Checks and Adjustments
B. l
uBrIcAtIon
Proper lubrication is important for maintaining
reliable ground and test device performance.
The Power/Vac
®
mechanism uses bearings
which have a synthetic lining in some locations.
These bearings do not require lubrication to
maintain low friction, but lubrication does not
harm them and oiling lightly is recommended.
Sleeve bearings are used in some linkage
locations and needle or roller bearings are used
for low friction on the flywheel, trip shaft, and
close shaft.
Providing a fresh lubricant supply at periodic
intervals is helpful in extending the useful
life of the ground and test device mechanism
especially where frequent operation may have
forced lubricant out of the bearing surfaces.
Use Mobile 29 (black grease) 0282A2048P005
on all mechanical bearings and sliding surfaces
in the Power/Vac mechanism. This grease
contains extreme pressure (EP) additives to
improve its load bearing capability. Use the
standard red grease on all other applications,
such as the primary current disconnect fingers
as described in the following.
Electrical primary contact surfaces also require
periodic lubrication to inhibit oxidation and
minimize friction. At each inspection and
maintenance interval, do the following:
1. Metal contact surfaces such as the movable
contact rod of the interrupter should be
lubricated with 0282A2048P009 grease.
This grease is available packaged in 4oz.
collapsible tubes.
2. Silvered primary contact surfaces.
Wipe clean and apply a light coat of
0282A2048P009 grease on primary
disconnect fingers.
3. Pins of the secondary disconnect
coupler should be lightly coated with
0282A2048P009 grease.
Care should be taken to ensure that the grease
is only applied to the pins and not the body of
the secondary coupler.
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Maintenance
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