If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
E-2
TROUBLESHOOTING
RANGER
®
330MPX
AUXILIARY OUTPUT
No 120 VAC output
1. Check that the 20 Amp circuit breaker did not trip
If all recommended possible areas of
misadjustment have been checked and the
problem persists, Contact your local Lincoln
Authorized Field Service Facility.
2. Check that the 50 amp breaker did not trip
3. Check that the GFCI has not reset.
4. Inspect the alternator brushes for wear or
corrosion on the slip rings
5. Faulty pc board
No 120 VAC and no 240 VAC
output
1. Check that the 50 amp breaker did not trip
2. Inspect the alternator brushes for wear or
corrosion on the slip rings
3. Check flashing diode
4. Faulty pc board
ENGINE
Engine will not crank
1. Low or weak battery.
If all recommended possible areas of
misadjustment have been checked and the
problem persists, Contact your local Lincoln
Authorized Field Service Facility.
2. Inspect for loose or corroded battery terminals.
3. “Battery circuit” circuit breaker (CB4) has tripped.
4. Faulty starter motor
5. Check starter terminals for loose or missing wires.
6. Check start switch wires for positive connection.
Engine will crank but not start
1. Out of fuel.
2. Check choke operation.
3. The machine was in a sleep mode. Place the
OFF/IDLE/RUN/START switch in the OFF position
for 10 seconds and then restart.3.
4. Enter correct security PIN if the PIN is enabled.
5. Fuel pump not working
6. Ensure spark plug wires and spark plugs are in
good shape and installed properly.
7. Bad coil, remove spark plug and check for spark.
8. Low oil pressure sensor is loose or not working.
Engine shuts down shortly after
starting
1. Low fuel level.
2. Low oil level.
3. Clogged fuel filter. Clean.
4. Faulty oil pressure switch.
5. Faulty fuel pump
Engine has low output or runs
rough
1. Low fuel
2. Clogged fuel filter
3. Clogged air filter
4. Choke is stuck.
5. Poor quality fuel – fuel has sat for a long time.
6. Spark plugs are fouled, or plug wires are loose.
7. Valves are out of adjustment.
8. Verify the correct fuel cap is being used.
