Replacement Onbaord Onan Generator For 6.0HDKAP-1044 In Tiffin Allegro 36QSA
Updated 08/15/2025 | Published 07/16/2025
Question:
We’ve got a 2011 Tiffin Allegro Red 36QSA diesel pusher with the original Onan that finally gave up. Will this CM94RR in or am I looking at a custom bracket situation?
asked by: Joe
Expert Reply:
Great news, Joe. The Onan 6k watt onboard generator with diesel cummins engine # CM94RR is a direct replacement for the Quiet Diesel 6000 that came factory-installed on many Tiffin Class A rigs from the 2010–2015 era. The model number for that original unit was typically 6.0HDKAP-1044 or a close variant in the HDKAP series.
The # CM94RR is Cummins' current part number for the direct replacement QD6000. Same footprint, same 3-cylinder diesel hookup, and it bolts in using your existing mount.
You’ll just need to reconnect your fuel, electrical, and exhaust lines. If your bay is clean and rust-free, install takes a few hours with basic tools. We’ve had several Tiffin owners do this swap with great results.
Product Page this Question was Asked From
Cummins Onan Quiet Series Onboard RV Generator - 6,000 Watts - Diesel
- Generators
- No Inverter
- Diesel
- 6000 Running Watts
- Fixed Mount
- 120 Volt Output
- Electric Start
- Cummins Onan
more information >
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Andrew N.
8/15/2025
Hey Joe, how did the installation of the new generator go? I'm curious to know if everything fit smoothly and if you're up and running again. Your experience could really help others in a similar situation!