From FSX Cleaning Manual: Chapter 11


Complete and accurate recordkeeping is a very important aspect of a DPF cleaning operation.  Records from a prior service can be an invaluable reference when receiving the same filter again for cleaning.  Additionally customer service can be enhanced by having complete documentation of a filter’s cleaning history.  This history can provide valuable information on the frequency and effectiveness of cleaning procedures.

A thorough documentation of a DPF’s visual inspection and testing results prior to cleaning is necessary to determine the proper cleaning processes to apply to the filter.  Section 15 has an example of a cleaning history worksheet that may be helpful to use.  While most items are self explanatory a few will be further discussed here.

  • Serial Number:  There are some DPF manufactures that did not place a serial number on the filter.  Without any other way to identify an individual filter, you may have to attach your own number to the filter.
  • Before Cleaning; End Colors and Observed Damage:  A visible inspection of the DPF should include recording the color of each end prior to applying cleaning processes as well as any visually identifiable damage.  See section 7 for additional discussion of these inspection items.
  • After Cleaning and Testing Results:  Document the results of cleaning processes here.  There are locations to record testing results after pneumatic cleaning as well as after thermal cleaning (if needed).   
  • Tag Color / Baseline Ranges:  Section 14 of this manual contains a chart of baseline measurements for various filters.  Use this chart to complete this section for the particular filter model being cleaned.

Database of Cleaning Results:

FSX recommends creating a database of cleaning results to store summary information on every DPF cleaned.  This provides a single location to identify the number of times a filter has been cleaned as well as the frequency and effectiveness of cleaning results obtained.  At a minimum this database should include:

  • Date
  • Filter Manufacturer and Model
  • Serial Number
  • w.g. Before Cleaning
  • w.g. After Cleaning
  • Thermal Cleaning (Y / N)

Baseline cleaning ranges are included for many common DPF’s in section 14 of this manual.  If you are working with a filter that is not on the baseline chart and you are unable to acquire new filters to develop a baseline reading (see section 8), then this database will help develop a reasonable baseline reading for a specific filter model.  Over time the cleaning results will show a clear indication of the best (ie. lowest) w.g. reading that is achievable for that specific filter model.  This reading can then be taken as baseline.  Be sure not to include damaged filters in your analysis since these often allow too low of a w.g. reading.

 Example Database:

DPF  Serial# DATABASE Cleaning Results
Serial # Owner Part Number Mfg Tag Color
Date w.g.”
222338 xxxxxxxxx Q617788 Cummins Green 8/16/2007 4.60 2.70 0 P
259814 xxxxxxxxx Q619495 Cummins Green 9/5/2007 3.65 2.85 0 P
160707 xxxxxxxxx 4000-DQ-5C57-21 DCL Green 5/21/2008 6.25 4.55 0 T
10203586 xxxxxxxxx 5229B4598 PACCAR Green 6/24/2008 4.35 2.45 0 T
12051007 xxxxxxxxx P231067 Cummins Red 7/17/2008 5.10 3.70 0 T
33024070335 xxxxxxxxx Q621937 Cummins Green 7/14/2008 5.00 2.35 1 T