b. Remove the wheel mounting kit and associa-
tedhardware in reverse order as-illustrate in
17-22. Inspection and Repair.
Refer to Operator and Organizational Maintenance
Manual for wheel-mounting kit inspection and re-
Using a lifting device, with 10, 000 pound
The load bank is a balanced, three phase,
four-wire device that can be used to apply a re-
sistive load to the generator. The purpose of the
resistive load is to provide a partial load for the
set if the normal utility load is too low to keep the
engine generator set operating without carboniza-
tion of the engine.
b. When the load bank is used in conjunction
with the engine-generator set, the generator is
protected against overloads by the load reject relay
A41, incurred as a result of increases in utility
The selected kw load of the bank is continu-
The load reject relay, utilized when
the load bank mode selector switch is in the auto
position, receives the output of the load measuring
The load measuring unit senses the generator
output (utility load plus load bank), should the com-
bined load exceed 50% of the rated generator capa-
city 60 kw (i. e. 30 kw). The LMU output voltage
applied to the load reject relay causes contacts
within the load reject relay to close, resulting in
the energizing of the trip coil of the Over Tempera-
ture Reset switch.
d. This action removes the selected load from
thegenerator output allowing continued supply of
the utility load without the risk of generator over-
When the generators utility load diminishes
the load bank may be reapplied by manually reset-
ting the Over Temperature Reset switch.
f. Positioning the load bank select switch to the
manual mode disables the trip feature previously
Protection of the generator against
overloads produced by combined load bank and util-
ity loads is then the responsibility of the operator.
The total load is displayed on the panel mounted
Should the displayed reading exceed the
sets rated capacity, the operator must reduce or
remove the load bank setting with the load bank
capacity, hoist engine generator set until bottom
of skid base clears ground by approximately two
b. Position front and rear running gear and
lower engine generator set until it just rests on
running gear axles.
Install kit with attaching hardware as illust-
rated in figure 17-6.
g. The load bank incorporates a thermostatic
switch which will operate the trip end of the Over
Temperature Reset switch to remove the selected
load from the generator when the ambient tempera-
ture reaches 450 ± 15° F. The thermostatic switch
is fully operable in both manual and automatic
modes of operation.
17-25. Removal and Disassembly.
a. Removal. Refer to Operator and Organiza-
tional Maintenance Manual and remove the load
See figure 17-7 and disassem-
ble the load bank.
17-26. Repair, Overhaul and Rebuild.
a. Test diodes per paragraph 14-10. Replace
a defective diode.
b. Repair or rebuild wiring harness as required.
Refer to Chapter 5, and to wiring schematic in
Chapter 1 for wiring instructions.
c. Refer to figure 17-8 and perform load reject
d. Rotary Switches.
Refer to Operator and
Organizational Maintenance Manual.
e. Fan and Motor Assembly. Refer to Operator
and-Organizational Maintenance Manual.
Refer to Operator and Organi-
zational Maintenance Manual to remove the fan and
See figure 17-9 and dis-
assemble in the numerical sequence illustrated.
(3) Cleaning and inspection.
1. Blow out
frame and wipe interior
all dirt from inside field
with a clean cloth.