S e c t i o n X V I . E N G I N E G E N E R A T O R S E T H O U S I N G G R O U P
3 - 1 3 6 .
G e n e r a l .
3 - 1 3 7 .
R e m o v a l
a n d
R e p l a c e m e n t .
This section contains information on the housing
See f i g u r e 3 - 2 2 and remove and replace damaged
group which encloses the engine generator set. The
doors, covers, panels, and associated hardware of
housing group is made up of covers and panels
the housing group.
Remove the load bank, if in-
which are bolted together, and hinged doors which
stalled, as described in p a r a g r a p h 4 - 4 9 .
provide access to components:
S e c t i o n X V I I . E N G I N E G E N E R A T O R A N D C H A S S I S
I N T E R C O N N E C T I N G
W I R I N G
H A R N E S S E S
3 - 1 3 8 .
G e n e r a l .
This section contains
information on interconnect-
ing wiring harnesses of the engine generator and
chassis. The wiring harnesses provides electrical
interconnection between major assemblies of the
engine generator set.
3 - 1 3 9 . I n s p e c t i o n , T e s t , R e p a i r a n d R e p l a c e m e n t .
See f i g u r e 3 - 2 3 and proceed as follows:
CAUTION
As a precaution against short
circuits, disconnect the bat -
tery ground cable from the
batteries before inspecting,
testing, or replacing any
wiring.
~.
Inspection.
(1) Inspect connectors for damaged threads;
bent, loose, or missing pins.
(2) Inspect terminal lug for security and condi-
tion.
(3) Inspect wiring for defective insulation.
b. Test. Perform continuity check, using multi-
me~er between connecting points in the wiring
harness using the wiring data contained in f i g s . 1 - 1 3
t h r o u g h
1 - 1 6 .
Check for short circuits between con-
nector pins of the same receptacle or terminal
board following data shown in f i g s . 1 - 1 3 t h r o u g h
1 - 1 6 .
c.
Repair.
—
(1) If a broken wire is accessible, remove
sufficient insulation from each side of the break to
allow a good connection of the bared ends by twist-
ing them together. Solder the connection and wrap
with electrical tape.
(2) If a wire is broken from a terminal lug,
replace the lug.
If a wire is broken from a connec-
t or, resolder and reassemble.
CAUTION
Under no condition leave the
bare connection exposed.
(3) If a break in the wire is inaccessible with-
in the wiring harness, disconnect it at ooth ends and
tape both ends. Lace a new lead of the same gage
and insulation outside the harness and connect it to
the proper terminals or pins. Properly tag both ends
of all replacement wires.
~.
Replacement.
If 30% of the harness wires are
defective, the harness must be rebuilt by inter-
mediate maintenance, but may be replaced by org -
anizational maintenance.
Tag all wires, connectors,
and terminal boards for positive identification when
a defective harness is removed. Disconnect harness
connectors from receptacles by unscrewing connec-
tors in counterclockwise
direction. Remove all
clamps which secure harness in position. Install
new or repaired harness in reverse sequence of
removal.
Section XVIII LOAD CONNECTION GROUP
3 - 1 4 0 .
G e n e r a l .
3 - 1 4 1 . M a i n A C C o n t a c t o r .
The lend connection group ( f i g . 3 - 2 4 ) is used to pro-
See f i g u r e 3 - 2 4 and proceed as follows:
vide the electrical connection between the engine
a. Inspection. Inspect mam ac contactor (3),
generator set and the external equipment to be
whi?h is located at the right of the reconnection board
operated.
(15), for secure mounting, loose electrical connec -
tions, frayed cables or insulation, loose connector
mating and other damage.
3 - 6 0
