- Electric Power Generation:
- C7.1 (S/N: MRP1-UP)
- Engine:
- C13 (S/N: N3F1-UP; KWJ1-UP)
- Generator Set:
- C15 (S/N: T4A1-UP; X5M1-UP)
- Industrial Engine:
- C7.1 (S/N: 7701-UP; 8811-UP)
- XQ375 (S/N: X3F1-UP)
- C15 (S/N: N5F1-UP; LDN1-UP; MG21-UP)
- C18 (S/N: N8F1-UP; BDN1-UP; BE21-UP)
- C9.3 (S/N: C9N1-UP; D9N1-UP; CS91-UP)
On certain Tier 4 interim and Tier 4 final engine systems, the DPF requires maintenance at 5,000 hours to remove ash buildup from the filter.
For scheduling purposes, Caterpillar still recommends the 5,000 hour point the most reliable time to clean the DPF. However, there are secondary indicators that can be used to determine when the DPF maintenance is needed.
The engine ECM contains two event codes related to ash loading of the DPF. The first code 3720-15 High #1 DPF Ash Loading is a time-based event that will activate at 5,000 hours. The first code provides first notification of needed DPF ash service. The second code 3720-16 High DPF #1 Ash Loading will activate based on ECM algorithms to determine the approximate ash build-up based on speed/load histograms, temperatures, etc. The engine ECM estimates that ash volume in the DPF is approaching a point where system performance will be impacted. The 3720-16 High DPF #1 Ash Loading code will activate notifying the operator of this condition. Caterpillar recommends performing the ash cleaning maintenance within 250 hours of the 3720-16 High DPF #1 Ash Loading code becoming active.
The 3720-16 will not occur until at least 5,100 hours of operating time. Some applications may run more than 5,100 hours before activating the code. This action is due to ash loading rate being slower than normal based on the operating conditions of the engine described above.