Output rectifier, Troubleshooting and repair, Output rectifier bridge test (continued) – Lincoln Electric EAGLE SVM192-A User Manual
Page 60
(-)
(+)
(+)
(+)
(-)
(-)
OUTPUT RECTIFIER
ENGINE
FIGURE F.4 – LOCATION OF OUTPUT RECTIFIER LEADS
OUTPUT RECTIFIER BRIDGE TEST (continued)
TEST PROCEDURE
1. Remove the spark plug wires to prevent acci-
dental engine kickback or starting.
2. With the 5/16” nut driver, remove the 6 sheet
metal screws from the case top.
3. Remove the rubber gasket (cover seal) from the
lift bail.
4. Remove the fuel cap. The rubber gasket for the
fill tube will come off with the case top.
5. Remove the case top, then replace the fuel
cap.
6. With the 5/16” nut driver, remove the 5 screws
holding the right case side.
7. Remove the right case side by lifting up and
out.
8. Conduct the test with the gasoline engine OFF.
9. Locate the Output Rectifier Bridge behind the
machine case front.
10. With the 7/16” wrench or socket wrench and 6”
extension, remove the nuts and washers hold-
ing the diode bridge pigtails and the heavy cur-
rent-carrying leads to the studs located in the
middle of the rectifier assembly.
Note their
locations and the order of fasteners for
reassembly.
11. Electrically isolate the (-) diode connectors by
slightly bending them back into “free air.”
12. With an ohmmeter or diode tester, check each
of the four diodes from their connector to their
respective heat sinks. See Figure F.4.
13. Reverse the tester leads and check the diodes
again. Diodes should have a low resistance in
one polarity and a very high resistance in the
opposite polarity.
14. Replace any “shorted” or “open” diode bridge
assembly the tests indicate.
15. Reconnect the diode connectors and heavy
leads to their respective studs.
16. Reinstall the case side, case top, fuel cap, lift
bail gasket and spark plug wires.
TROUBLESHOOTING AND REPAIR
F-24
F-24
EAGLE™ 10,000