Cummins HC Alternator HC444C

Coupling Arrangement Inspection

Remove the DE adapter screen and cover to access the coupling

Check the condition of the coupling discs

Replace the complete set of discs if any are damaged

Check tightness of bolts fixing the coupling discs to the engine flywheel

Tighten bolts in the sequence shown for alternator coupling in the Installation chapter

Check all alternator/customer connections and cabling

Test Initial AVR and PFC set up with alternator running

Check customer connection of auxiliaries

Test synchronization with alternator running

Disconnect the cables from the X+ (F1) and XX- (F2) terminals of the AVR

Is the excitation voltage supply to the exciter stator disconnected?

Run the generator set in a de-excited state

Is air flowing freely through the alternator?

Is the anti-condensation heater operating?

Direct hot air from electrical fan heaters into the alternator air inlet

Distance of heat source from windings (in mm)

Check for signs of wear or damage

Is there any damage to the seals?

Is there any discoloration of the bearing races?

Does the bearing need to be replaced?

Describe any issues found during inspection

Perform PI test for MV/HV windings

Test temperature sensors with alternator running

Record customer settings for temperature sensors