Onan MEP-003A - Page 67

TM5-6115-585-34
NAVFAC
P
-
8-623-34
TO
-
35C2-3-455-2
TM
-
05684C
/
05685B
-
34
Table
6-3
.
AC
Output
Control
Box
Wiring
Harness
(
MEP
-
003A
Only
)
(
Cont
)
Wire
No.
Marking
Color
Gauge
Length
in Inches
Terminal
Lugs
X29A16
X30A16
X30B16
X30C16
16
16
16
16
black
black
black
black
19.5
14
15
32
MS25036-153
MS25036-153 , MS25036-107
MS25036-107 , MS25036-108
MS25036-153 , MS25036-107
X31A16
X31B16
X32A16
X33A16
16
16
16
16
black
black
black
black
7
22
16
14.
5
MS25036-107 ,
MS25036-153
MS25036-107
MS25036-153
, MS25036-108
MS25036-153
, MS25036-153
X34A16
X34A16
X36A16
X37A16
16
16
16
16
black
black
black
black
17
19
28
28
MS25036-153
MS25036-153
MS25036-153 , MS25036-153
MS25036-153 , MS25036-153
16
16
X38A16
X39A16
X40A16
X47A16
16
16
black
black
black
black
25
26
21
22
MS25036-153 , MS25036-153
MS25036-153
MS25036-153
MS25036-107 , MS25036-153
X48A16
X49A16
X76A16
X77A16
16
16
16
16
black
black
black
black
20.5
16
16
34
MS25036-107 , MS25036-153
MS25036-107
,
MS25036-153
MS25036-153 , MS25036-108
MS25036-153
X31F16
16
black
35
MS25036-107 , MS25036-153
6-6 . VOLTAGE REGULATOR .
2.
Test
,
on
Equipment
.
( 1 ) Operate set at rated load and adjust output
voltage as follows :
( a ) Refer to figure 6-5 ( or 6-5.1 ) and turn
adjustment screw on resistor R15 ( or R16 ) counter
clockwise until voltage becomes unstable .
NOTE
Voltage instability will be most evident im
mediately following application or removal of
the load .
(
4
)
AC
Voltmeter
(
M5
)
(
18
,
figure
6-3
)
.
Tag
and
disconnect
two
leads
from
meter
.
Remove
three
screws
,
nuts
,
and
lockwashers
attaching
meter
to
control
panel
and
remove
meter
.
d
.
Meters
(
replace
).
( 1) Frequency Meter ( M3 ) ( 16 , figure 6-3 ) . Posi
tion meter in control panel and attach with three
screws , lockwashers , and nuts . Connect the two elec
trical leads and remove tags
.
( 2) Frequency Transducer ( A3 ) ( 56 , figure 6-3 ) .
Position transducer to back of control cubicle and
attach with four screws ( 54 ) and nuts ( 55 ) . Connect
the four
electrical
leads and
remove
tags .
( 3 ) Percent Current Meter ( M4 ) ( 17 , figure 6-3 ) .
Position meter on control panel and attach with three
screws , lockwashers and nuts . Attach the two elec
trical leads
and
remove
tags .
( 4 ) AC Voltmeter ( M5 ) ( 18 , figure 6-3 ) . Position
meter on control panel and attach with three screws ,
Jockwashers , and nuts . Attach the two electrical leads
and remove tags
.
6-5 . GENERATOR SET WIRING HARNESS .
a . Remove
( see
figure
6-2
) . Refer
to
figure
6-2
and
remove
wiring
harness
at
terminal
boards
and
connectors
.
b
.
Repair .
Replace
wires
and
terminals
as
needed
.
See
table
6-2
( b ) Turn
screw
on
R15
( or
R16
) clockwise
to
reach
stability
.
(
c
)
Turn
screw
on
R15
(
or
R16
)
clockwise
two
additional
turns
.
( 2 ) Operate Generator Set at 120 volts , single
phase load at 25 % , 50 % , 75 % and 100 % load .
( 3 ) If . Li to L3 voltage deviates more than 5 %
over the load range , voltage regulator is defective .
b . Inspect ( see figure 6-3 ) .
(
1
)
Drop
the
control
box
panel
(28
)
by
loosening
fasteners
(
9
)
to
expose
the
voltage
regulator
(
39
).
( 2 )
Visually
inspect
the
voltage
regulator for
poor
connection or
burned
or
open
components or
cracked
circuit
board
.
6-8
Change
2