replacement of, rather than repair of, a faulty
Two types of organizational maintenance are (1)
operator and (2) preventive. Each of the two types
should complement the other.
Defects discovered during operation of the unit will
be noted for future correction either by the operator or
by maintenance personnel, as appropriate. The purpose
of preventive maintenance is to keep the machinery
The operator will likely have
fewer problems if the preventive maintenance work is
In our previous discussion we have seen that
operator maintenance includes many of the tasks you do
before, during, and after you operate the generator set to
As a member of a unit or organization large enough
to have a maintenance crew, you may serve as a member
of the crew. As a crew member, you will perform
organizational preventive maintenance functions on the
generator set periodically according to the
manufactures specifications or to service maintenance
To prevent buildup of contaminants that may cause
damage to the operating components or systems of the
generator set, you should clean the set periodically.
Cleaning operations must be performed only on
generator sets that are not operating, that are connected
to a parallel bus, or that are connected in a standby
mode. To clean the generator set, heed the warnings and
cautions given, and proceed as follows:
Compressed air used for cleaning can
create airborne particles that may enter the
Pressure shall not exceed 30 psig
(206 kPa). Wearing of goggles is required.
Exercise care to prevent dry-cleaning
solvent from coming into contact with
Painted metal surfaces should be wiped with a clean
lint-free cloth moistened with cleaning solvent (P-D-
680, type II). Hard deposits may be scrubbed off with a
bristle brush that has been dipped in solvent. Dry the
surfaces with a clean lint-free cloth.
Dry-cleaning solvent, P-D-680, type II, is
flammable and moderately toxic to the skin and
eyes. Respiratory and eye protection are
Remove any dust, dirt, or sand from inside the
generator set with a damp, lint-free cloth.
Disconnect the battery cables (negative cable first)
and remove any corrosion from the battery terminals,
cables, and hold-down with a wire brush. Clean the
battery filler cap vent holes.
Clean the instrument faces with a clean, lint-free