Winco W10PTOS/A - Manual (Page 10)

10 3225-00 60706-241
Page 8 60706-180 0310-00
SERVICE DIAGNOSIS
Increase size of line wiring. Might also be the result of loose
connection indicated by excessive heating at the loose
connection terminal.
Check for overload on the tractor or undersized.
Check tractor governor. Tight or defective throttle levers
and joints.
Worn or defective tractor engine (see engine manufacturers
check list.)
REMEDY
Back flash the 120 volt circuit with 12 volts DC
Replace grounded rotor assembly.
Repair or replace stator assembly.
Replace defective diode(s).
Clean and tighten generator and receptacle connections.
Clean screens, make sure interior of generator is unobstructed.
Readjust or Replace as required
Test and replace if defective.
Resync drive line halves.
Realign within 10 degrees.
Replace stator. (Include generator model and serial number
on the order.)
Same as above.
Same as above.
Repair or replace as required
Test and replace if defective.
Low Speed
High line loss. Indicated by lower voltage at load than at
generator terminals.
1. Undersized/overloaded.
2. Defective governor.
3. Low power - worn engine.
LOW OUTPUT VOLTAGE
POSSIBLE CAUSE
Loss of residual magnetism. Usually occurs only after
disassembly of field frame or severe mechanical stress/abuse.
Grounded or shorted rotor winding.
Open excitor circuit in stator
Defective diode(s) on rotor.
Broken or corroded connection.
NO OUTPUT VOLTAGE
Clogged ventilating inlet and/or outlet.
EXCESSIVE HEATING
Generator is spinning too fast, slow tractor down.
HIGH OUTPUT VOLTAGE
Shorted or grounded rotor coil.
VOLTAGE UNSTEADY/ LIGHTS FLICKERING
Drive line knuckles out of sync. (See Figure 5.)
PTO drive line alignment.
Shorted stator winding. This can be identified by the use of an
internal “growler” at a competent rewinding shop.
Grounded stator. Check winding by test lamp or high potential
tester from stator leads to lamination.
Open stator circuit. Measure circuit between leads with an
ohmmeter. Should have a circuit between any pair of leads.
Defective stator
Defective Capacitors