I am trying to repair a alternator off of a thermo king apu
How to Find the Right Thermo King APU Alternator & Regulator Parts
Customer Question:
"Hi i am trying to repair a alternator off of a thermo king apu. Not sure of a part number or even who makes it. There is a number on the regulator/brush holder and its N9409B and a number on the case and its 2H16147001/452669. Any help would be greatly appreciated."
The numbers on your unit pinpoint this as a heavy-duty Thermo King / TriPac APU alternator, and you can resolve your repair by sourcing the direct Thermo King replacement regulator under part number 42-2526.
We will update this answer when we have more information and parts. At this point we do not have the availability of parts for this. See the link below for correct 422526 Regulator - Please verify all information with this supplier. https://parts.thermoking.com/store/s/product/regulator-brush-422526/01t4w00000NlH9PAAV?language=en_US
🔧 The Probable Fix
• The casing number 45-2669 (often stamped as 452669) identifies the complete Thermo King alternator assembly used heavily on TriPac auxiliary power units.
• The regulator (with very worn brushes) number N9409B crosses directly over to the Thermo King brush/regulator kit 42-2526, which is the primary wear item responsible for charging failures on these units.
• If the internal rotor or stator is damaged, it is highly recommended to replace the entire assembly using the cross-references below, as individual internal sub-components for this specific case number are notoriously difficult to source.
🔍 Part Cross-Reference Matrix
• Thermo King Alternator OE Number: 45-2669, 452669
• Thermo King Regulator & Brush Kit: 42-2526, 422526
• Secondary Case Reference: 2H16147001
• Lester/PIC Equivalent Reference: 20349 (APU Series)