Lincoln Electric RED-D-ARC GX 300, Operator'S Manual, Page: 42 / 48

F-9 DIAGRAMS F-9
GX 300
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diag
ram for a particular code is pasted inside
the machine on one of the enclosure panels. If the diagram is illegible, write to the Service Department for a replacement. G
ive the equipment code number..
CO
NTAC
TO
R
CO
NT
RO
L
SH
OW
N I
N
"WE
LD
IN
G
ON
"
POSIT
IO
N
W
IR
E
F
E
ED
P
O
W
E
R
W
IN
D
IN
G
42 VA
C
C11
C10
42 VA
C
FI
EL
D
W
IND
IN
G
G
N
D. S
C
R
EW
O
N LEFT
INSIDE
CASEF
R
O
NT
D3
A
R
C
C
O
N
TR
OL
10K
ALL
C
A
SE
FR
ONT
C
OM
PO
N
EN
TS S
H
OW
N
VIE
W
ED
F
R
OM
R
E
AR.
42
W
3
CB7 15A
S1
9
7
W
1
ST
A
TOR
WELD WI
N
D
ING
S
W
3
W
2
75
R
1
76
77
278
C
CW
OUTPUT
CO
NT
. PO
T
S3
2
GN
D
-G
GN
D
-D
GN
D-E
300 AMP M
O
D
U
LE
SHUN
T
50
MV
=400 AMPS
3
R
OT
O
R
5A
3D
3A
5A
5B
5C
3
6
3E
6F
BLACK
50A
50A
20A
20A
B
LA
C
K
WH ITE
WH ITE
BLAC K
BL
AC
K
W
H
ITE
BL
AC
K
BL
AC
K
W
H
ITE
W
H
ITE
STATOR
A
U
X.
W
IND
IN
G
CONN
ECTOR
S
VIE
W
ED
F
ROM
IN
SERTION
EN
D
EL
EC
TRICAL SYM
BOLS
P
ER
E
15
37
FR
AME
GND
.
5C
3A
3 6B
6
6B
CB1
CB2
CB5
CB6
6B
5B
J101
J102
J100
3E
6E
11
5/
23
0V
10K
9
7
41
20
6B
20
6A
20
0A
20
1
20
1A
20
0B
32
3A
5C
+
HO
UR
MET
ER
22
4B
5
5H
H
E
ATS
IN
K
208
4
279
BOTTOM
G
N
D I
N
SI
D
E
C
AS
EF
RO
NT
PC
B 1
D1 -
THR
EE
P
HA
SE
B
RI
DG
E
RE
CTIFIER
W4
W5
W6
6
3
W10
2
1
P6
-J6
16
8
1
9
P3
-J3
9
1
16
PCB2
W
ELD
C
ONTROL
PC
B
OA
RD
Sh
un
t
Sen
se/
Idler/ PWM
204
S
206
S
S6 MODE
SELECTOR
SW
ITCH
2A
13
5G
20
6S
20
4S
14
20
6A
20
8B
A
4
3
2
1
222
TIG
CC
PIPE
CV
220
218 214
8
C
CW
R
2
B7 B8
L1
CH
OK
E
W9
W8
3
6
W
RA
P T
W
O T
UR
NS
#3 &
#6
LE
AD
S
IN
D
IR
ECT
IO
N
SH
OW
N
TH
RO
UG
H
TO
RO
ID
3
6
GX
300
-
W
IR
IN
G
DI
AG
RA
M
ID
LE
R
CO
NT
RO
L
SH
OW
N I
N
"AUT
O"
POSITI
ON
S4
252 251
C
3
800uf 15
0v
dc
PO
SIT
IV
E
BRUS
H
CONN
EC
TE
D
TO
S
LIP
R
IN
G
NE
ARE
ST
TO
T
HE
LA
M
IN
AT
IO
N
W
HITE
TERM.
L2
L3
TWIS
TE
D
P
AIR
W6
12
V
OL
T
BA
TTERY
-
GN
D-H
ENG
IN
E
BLO
CK
+
W11
(LOC
AT
ED B
ELOW
TERMINAL
2)
S1R
UN
-STOP
SWI
T
C
H
(S
H
O
W
N IN
RU
N POS.)
12
7
6
1
1 2
6
10
L2,
L3: RF
CH
OKE
S
16
9
8
1
CB8
TOP
GN
D.
S
CR
EW
ON
IN
SI
DE
OF
CASE
FRONT
LE
A
D
C
O
LO
R
COD
E:
B
=B
LA
C
K
O
R
G
R
A
Y
R
=RE
D
O
R
P
IN
K
W
=W
H
ITE
G
=GR
E
EN
(W
/YEL
LO
W
STRI
PE)
FR
AME
GN
D.
5
1
41A
42A
15A
20
8A
21
S5
VOLTMET
ER
PO
LA
RITY
S
W
ITC
H
20
6A
S
H
O
W
N
IN
P
O
SITIVE (
+)
P
O
SITION
G4386
A.01
31
32
A B C
77B
21 75B G
N
D-
A
41A 42A
76B
115VA
C
CONTACTO
R
77B 76B
W
O
RK
75B
R
EM
OTE
CONT
R
O
L
42VAC
G
R
O
UN
D
A
M
PH
EN
OL 1
R
EM
OTE
A
M
PH
EN
OL 2
CONT
R
O
L
J A D C H B
K
E F G
I
20
8C
20
6C
BYP
ASS
FILTER ASSEMB
LY
5N
4A 2A
20
8C
20
6C
20
6B
4A
77A 76A 75A
Ba
ttery Char
ge
Li
gh
t PL2
9
1
16
8
7
1
12
6
P7 - J7
Ou
tp
ut
&
Arc
Co
nt.
M
od
e
Sele
ct
P2 - J2 Eng
ine &
Ba
ttery
Fu
nc
tio
n
P1 - J1 Amph
en
ol,
M
od
el
Sele
ct,
Ho
t S
tart
C8
C9
25
23
Tw
is
te
d
P
air
B4
B5
B6
B1
B2
B3
W5
200
77 76 75
277 279
278
277
214 218 220 222
21
5
25
2
25
1
77A
76A 75A
2
4
20
8B
26
0
26
1
13
14
23
26
0
26
1
22
4B
5G
21
0C
5K
5K
21
0B
20
0N
GN
D-K
GN
D-N
GN
D-E
GN
D-N
5K
5
5N
GN
D-G
GN
D-D
GN
D-C
GN
D-C
GN
D-A
31
GN
D-J
GN
D-J
20
0N
R
3
25
Key
Key
S2 START BUT
TO
N
22
4
5H
21
0A
R4
30
1
30
2
FRA
ME
GR
OU
ND
GN
D-K
GN
D.
S
CR
EW
ON
FAN
B
AF
FLE.
209
ENGINE COMPONENTS
B-
AC
AC
B +
GROUNDING THI
S
CI
RC
U
IT
STOP
S
THE ENGI
N
E
IGNITION MODULE
STARTER
1
2
3
P51
J51
OIL PR
ESSURE
SW
ITCH
V
W
H
ITE
R
FUEL S
H
U
TO
FF
SOLE
N
O
ID
EN
GI
N
E
TE
RMI
N
A
L
BLO
CK
4
224
210
REGULATOR
FLYWHEEL
A
LTE
R
NATOR
21
2A
ST
AR
TER
CR1 SO
LE
NOID
R
U
225
21
1A
22
1
22
9
21
1
22
8
22
5
22
9
22
8
21
2
21
0A
21
0
21
0B
21
1
21
1A
22
1
5J
5J
2
1
204
S
206
S
ID
LE
SO
LE
NO
ID
21
5
21
0C
30
5
W10
W7
HOT HOT
LI
NE