ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY nAVFAC P-8-624-12
5-22 PREVENTIVE MAINTENANCE CHECKS AND SERVICES.
a. General. To insure that the load bank is ready for operation at all times, it must be systematically inspected
in order that defects be discovered and corrected before serious damage or failure of the equipment re-
sults. Defects discovered during operation shall be noted for correction to be made as soon as operation
has ceased. Operation shall be terminated immediately if a defect which could cause damage to the
equipment is noted. All defects and shortcomings shall be recorded, together with the corrective action
taken, on the applicable forms at the earliest opportunity. Army and Navy users shall accomplish the pre-
ventive maintenance checks and services listed and described in subparagraph b. below. Air Force users
shall refer to the applicable inspection manuals and work card set in the T.O. 35C2-3 Series for periodic
requirements and Table 5-13, Table 5-14 for detailed procedures.
b. Preventive Maintenance Checks and Services (Army and Navy).
(1)
(2)
Operator Maintenance. Table 5-13 contains a tabulated listing of preventive maintenance checks
and services which shall be performed before, during, and after operation and the weekly checks
and services to be performed by the operator. The item numbers are listed consecutively and indi-
cate the sequence of minimum requirements. Refer to Table 5-13 for checks and services.
Unit Maintenance. Table 5-14 also contains a tabulated listing of preventive maintenance checks
and services which shall be performed by unit maintenance personnel at monthly and semi-annual
intervals. The item numbers are listed consecutively and indicate the sequence of minimum require-
ments. Refer to Table 5-14 for checks and services.
5-23 TROUBLESHOOTING. Table 5-15 contains a list of malfunctions which are useful in diagnosing and cor-
recting unsatisfactory operation or failure of the load bank. Each malfunction is followed by an alphabetical listing
of probable causes. The corresponding alphabetical listing of corrective actions contain references to the applicable
maintenance paragraphs for correcting the malfunction. The table lists only those malfunctions whose causes and
corrective actions are within the scope of unit maintenance. Any malfunction whose corrective action is beyond the
scope of unit maintenance shall be reported to higher level maintenance.
5-24
OPERATOR MAINTENANCE INSPECTION OF LOAD BANK.
a.
Visually inspect wiring harness assembly (Figure 5-11) for frayed or burned insulation, loose support
clamps and connections or other damage.
b. Visually inspect voltage selector connectors (3, Figure 5-12) and load selector switch (13, Figure 5-12)
for freedom of movement between positions, insecure mounting, loose connections, loose or broken control
knob and other damage.
5-25
UNIT MAINTENANCE OF LOAD BANK.
a.
Transformers. Visually inspect transformers for corrosion, frayed wires, signs of overheating, discolor-
ation, and other damage.
b. Voltage Selector Connectors.
(1) Removal.
(a)
(b)
(c)
(d)
Refer to paragraph 5-21 c. (1) above and remove load bank assembly from generator set.
Remove nuts (1, Figure 5-12) and screws (2) and pull voltage selector connectors (3) out from
load bank.
Tag electrical leads and unsolder connections to connector.
Do not remove screw and captive washer assembly (4) and protective cap (5) unless inspection
reveals damage.
(2) Cleaning and Inspection.
(a) Clean voltage selector connectors with filtered compressed air and a soft bristle brush or wipe
with a dean, lint-free cloth lightly moistened with an approved solvent.
(b) Visually inspect connectors for cracks, corrosion, stripped or damaged threads and other damage.
5-50
