Waukesha L1616-GSIU Engine Engine

This engine also powers 15 machine(s) on Power Equipment Info.

• Partial loss of residual in rotor.
  Fix: With plant operating, jumper from E2 to heat sink of field rectifier Z until voltage begins to build-up. Then remove.
• Pair of field rectifiers open (either W & Z or X & Y).
  Fix: Test rectifiers and replace if defective.
• Output, voltage slow to build . up and higher than rated volt- age after build up
  Cause: Open circuit in one or more control rectifier.
  Fix: Test rectifiers and replace if defective. Check soldered connections to rectifiers.
• Output voltage slow to build up and ten to twenty percent above rated voltage after build up
  Cause: Open in one field rectifier.; If field rectifiers Y and Z check okay, check continuities of gate windings Gl -G2.
• Output voltage slow to build up and five percent below rated voltage after build up
  Cause: Voltage regulation poor
  Fix: Either field rectifier W or Z shorted. Test rectifiers and replace if defective.
• Output voltage slow to build up
  Cause: Circuit breaker opens in about five seconds
  Fix: Either field rectifier X or Y shorted. Test rectifiers and replace if defective.
• Output voltage builds up normally with slightly less than rated voltage at no load and low voltage at full load
  Cause: Compound winding Sl - S2 installed backward or has open circuit.
  Fix: Check wiring diagram for polarity of compound windings ' through reactors A and B and test for continuity.
• Output voltage builds up normally but less than rated voltage after build up
  Cause: Shorted winding in control reactor.
  Fix: Test control reactor and replace if defective.
• Output voltage builds up normally but 20 percent above rated voltage after build up
  Cause: Voltage regulation poor.; Compound winding S1-S2 installed backward through one reactor (A or B).
• Output voltage builds up normally but 150 to 200 percent above rated voltage after build up
  Cause: No regulation possible. Control winding C1-C2 of reactor A or B polarized incorrectly.; Shorted turn in control winding C1-C2 or reactor A or B.; Open in control circuit.
• Output voltage builds up normally but 125 to 150 .percent, above rated voltage after build up
  Cause: Shorted turn in gate winding Gl -G2 of reactor A or B.
  Fix: Test reactors A and B for shorted turns and replace if defective.
• No AC power to Magneciter.
  Fix: Check AC voltage at E1-E2 with the plant operating. Voltage should be five percent of the rated voltage. If not, check continuity from El -E2 back tb generator.
• Generator will not build up voltage.
  Cause: Circuit breaker in 'off' or 'tripped' position.
  Fix: Reset. and close breaker.
• Generator voltage fluctuating while engine running at constant speed
  Cause: Incorrect setting on stabilizing resistor.
  Fix: Check resistance and reset.
• Both field rectifiers X and Y shorted.
  Fix: Test rectifiers and replace if defective.

Compiled from service & troubleshooting documentation across every generator set that uses the Waukesha L1616-GSIU.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.