Lincoln Electric RANGER 250 SVM150-A Service Manual page 79

F-29
AMPHENOL 2
C
B
D
A
E
F
KEY
KEY
NEGATIVE PUTPUT STUD
TEST PROCEDURE
For all tests: Perform the Case Cover Removal
procedure.
To test the 120 VAC winding:
1. Connect the volt/ohmmeter probes to either
120 VAC receptacle as follows. See Figure
F.10 and the Wiring Diagram.
Upper receptacle, to leads #3D and #5A.
Lower receptacle, to leads #6E and 5B.
NOTE: It is easier to insert the probes directly
into the receptacle to perform this test. However,
the probes may not reach in far enough to make
or keep a good connection. In this case, before
you start the engine, insert two test pins into the
receptacle. Hold the test probes against these
inserts to measure voltage (Step 3).
2. Start the engine and run it at high idle (3700
RPM).
3. Check the AC voltage reading. It should read
between 118 and 126 VAC.
TROUBLESHOOTING & REPAIR
STATOR VOLTAGE TESTS (continued)
FIGURE F.10 – RECEPTACLE LEAD LOCATIONS
GND C
AMPHENOL 1
C
B
A
J100
D
L
6F
J K 3E
120/240 V AC
E
M
N
I
F
G
H
5C
208
208A
208B
CASE FRONT - REAR VIEW
RANGER 250
50 AMP
3D
3
3A
GOLD
CB5
J102
3E
SILVER
GND G
5A
6
6E
6B
CB6
GOLD
J101 6F
SILVER
50 AMP
GND D 5B
SHUNT
204S
To test the 240 VAC winding:
1. Connect the volt/ohmmeter probes to leads
#6F and #3E where they connect to the
240VAC receptacle.
NOTE: It is easier to insert the probes directly
into the receptacle to perform this test. However,
the probes may not reach in far enough to make
or keep a good connection. In this case, before
you start the engine, insert two test pins into the
receptacle. Hold the test probes against these
inserts to measure voltage (Step 3).
2. Start the engine and run it at high idle (3700
RPM).
3. Check the AC voltage reading. It should read
between 236 and 252 VAC.
GND M
GND L
GND J
GND G
GND D
GND C
GND B
20 AMP
25 AMP
GND A
3A
209
31
CB7 CB1
5
5A
212A
3D, 32 5B
212
5C
5F
6B
42 5G
5H
CB2
CB8 5K GND E
5L
42A
6E
15 AMP 20 AMP
206A
206B
POSITIVE PUTPUT STID
206S
F-29