The Cummins/Onan NTTA855 engine line groups 3 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 903-0124 | NA | Service part / kit |
| 903-0204 | NA | Service part / kit |
| 903-0500 | NA | Service part / kit |
| 903-0604 | NA | Service part / kit |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.