- Industrial Engine
- C7.1 (S/N: 8811-253,255-255,257-269,271-272,274-274,276-310,313-373,375-382,386-487,489-523,525-539,542-544,546-551,554-591,593-597,604-606,609-609,611-621,627-627,634-634,638-657,662-662,664-675,683-686,688-692,694-695,697-697,700-700,702-702,713-714,722-723,734-734,736-738,741-747,752-754,756-757,775-778,800-801,803-806,821-823,846-846,879-879,884-884)
There have been some isolated instances of issues with debris blocking up the pickup pipe for the manifold (DEF Heater). This has resulted in a lack of injection of Diesel Exhaust Fluid (DEF). The following diagnostic trouble codes may be displayed in the electronic service tool:
- E931 (2) Low Aftertreatment #1 SCR Dosing Reagent Absolute Pressure: Low - moderate severity (2)
- E1370 (2) Aftertreatment Diesel Exhaust Fluid Dosing Unit Loss of Prime
A new Diesel Exhaust Fluid (DEF) filter has been introduced. The new DEF filter helps to eliminate debris from entering the DEF system and reduces the occurrences of the E931 (2) and E1370 (2) diagnostic trouble codes being displayed.
Table 1 contains the parts needed to complete the installation of the new DEF filter.
Note: Only one DEF filter group is required per engine. Use Table 2 to determine which filter is the appropriate filter for each DEF header.
| Part Number | Part Description | Qty |
|---|---|---|
| 378-3187 | Diesel Exhaust Fluid Filter Gp | 1 |
| 423-3251 | Connector | 1 |
| 391-5262 | Gasket | 1 |
| 425-0385 | Filter As | 1 |
| 452-6055 | Filter Base As | 1 |
| 453-1604(1) | Diesel Exhaust Fluid Filter Gp | 1 |
| 453-1605(1) | Diesel Exhaust Fluid Filter Gp | 1 |
| 453-1606(1) | Diesel Exhaust Fluid Filter Gp | 1 |
| (1) | Use Table 2 to choose the correct part that corresponds to the DEF heater |
| DEF Heater Part Number | Required DEF Filter |
|---|---|
| 434-3241 | 453-1604 |
| 434-3242 | 453-1605 |
| 434-3243 | 453-1606 |
The effective serial numbers for this change are related to the Pump Electronic Tank Unit (PETU) serial numbers and not the engine serial numbers. Table 3 contains the effective serial numbers for the PETU tank. Refer to illustration 1 and illustration 2 for examples of where to locate the PETU serial number.
| |
| Illustration 1 | g06018843 |
|
Typical example (1) The location of the PETU serial plate. | |
| |
| Illustration 2 | g03418749 |
|
Typical example | |
| PETU Effective Serial Numbers |
| S/N:PET007086T-UP |
Refer to Special Instruction, M0066142, A New Diesel Exhaust Fluid Filter is Now Available for C7.1 Engines for installation instructions.