Cummins/Onan 5.6TGHAA11381C — Testing the Stator

Testing & diagnosis · Generator stator

For the Cummins/Onan 5.6TGHAA11381C, from the Cummins/Onan service manual.

Applies to: Cummins/Onan TGHAA

Procedure

Disconnect all Tx winding leads from terminal block TB1 and the Bx and Qx winding leads from their connectors.
For grounded winding: on the highest resistance scale, test each lead for breakdown of winding insulation.
Replace the stator assembly if any reading is low.
For winding resistance: use a Wheatstone (Kelvin) bridge to measure each stator winding.
Replace the stator assembly if any winding is open or does not meet specification.

Tools required

Digital ohmmeter Amazon
Wheatstone (Kelvin) bridge Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

T1-T2 Amazon eBay, T3-T4 0.327 ohms
B1-B2 Amazon eBay 0.058 ohms
Q1-Q2 2.089 ohms

Full service-parts list: Cummins/Onan TGHAA →

Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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