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 Preventive Maintenance Checks and Services
Table 2-1.
S - Semiannually A - Annually
D - Daily W - Weekly M - Monthly
Q - Quarterly
Items To Be
Interval
Item
Procedures
Inspected/
no.
D
W
M
Q
S
A
Serviced
CONTROL CENTERS/SWITCHBOARDS - CONT
(2) Use multimeter to test all bus bars, circuit
Ship
86
q
breakers, and cable connections to ensure all
Service/Emer-
power supplies are de-energized.
Gency
Switchboard -
(3) Vacuum all components. Use dusting brush to
CONT
loosen dirt.
(4) Wipe all components with clean, lint-free rags
(NSN 7920-00-205-3570).
(5) Inspect all electrical and mechanical fastenings
and tighten loose connections. use lockwashers on
jam nuts, where necessary, to keep connections
tight.
(6) Ensure that all moving parts are free to function.
(7) Inspect all contacts for pitting, rough spots, and
proper seating. Dress with sandpaper if
necessary.
(8) Inspect the support of bus bars. Ensure that
these supports will prevent striking of bus bars
or grounded parts during periods of shock.
(9) Lubricate (sparingly) bearing points on circuit
breakers and rheostats. Wipe off excess oil
(MIL-G-23827).
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