Service Manual

Aftertreatment Testing ISB, ISBe and QSB (Common Rail [...]
Page 14-54 Section 14 - Engine Testing - Group 14
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Aftertreatment Testing (014-013)
Regeneration
CAUTION
Engine systems equipped with exhaust aftertreatment must operate on low sulphur diesel with a maximum
sulfur content of 50 parts per million. The use of high sulfur fuel will shorten the life of certain components in
the exhaust system, including the diesel oxidation catalyst. This damage could cause the engine to become
inoperable and affect the warranty coverage on the engine system. Refer to Fuels for Cummins Engines,
Bulletin 3379001.
Under some operating conditions, such as low speed, low load, or stop and go duty cycles, the engine aftertreatment
catalyst may not be operating at very high temperatures, and if non-approved high sulfur content fuel is used, there is
a probability that ammonium sulphate will accumulate on the catalyst, which will consequently reduce the
effectiveness of NOx conversion in the SCR system.
To rectify this problem, a Cummins® Authorized Repair Location will need to perform a Stationary (Parked) De-Sulfur
Regeneration of the aftertreatment catalyst. This must be performed at a Cummins® Authorized Repair Location.
A stationary regeneration can only be performed with the use of the INSITE™ electronic service tool, which is initiated
by selecting the feature option "De-Sulfur Regeneration Test". INSITE™ electronic service tool will then perform a
timed engine warm-up and will then raise the engine speed to between 2380 to 2450 RPM for a defined period. A
stationary (parked) regeneration will typically take approximately 2 hours to complete, and the vehicle must not be left
unattended during this period.
WARNING
During regeneration, exhaust gas temperature can reach 800 °C [1500°F], and exhaust system surface
temperature can exceed 700 °C [1300°F], which is hot enough to ignite or melt common materials, and to burn
people. The exhaust and exhaust components can remain hot after the vehicle has stopped moving. To avoid
the risk of fire, property damage, burns or other serious personal injury, allow the exhaust system to cool
before beginning this procedure or repair and make sure that no combustible materials are located where
they are likely to come in contact with hot exhaust or exhaust components.
NOTE: When the stationary regeneration process has been completed and before the vehicle is returned to service,
the lubricating oil and filter must be changed.
To perform a stationary (parked) regeneration, follow the steps listed:
1 Prepare the vehicle.
• Make sure that the fuel tank is full and that the oil quantity is sufficient.
• Inspect the exhaust piping and components for leaks, cracks, and loose connections. Reference Procedure
010-024 in Section 10 of the appropriate Service Manual. Tighten exhaust clamps, if necessary. Refer to the OEM
service manual.
2 Select an appropriate external location to park the vehicle.
• Preferably on a surface that will not burn or melt under high exhaust temperatures (such as clean concrete or
gravel, not grass or asphalt). Any Items that can burn, melt or explode (such as gasoline, paper, plastics, fabrics,
compressed gas containers, hydraulic lines) must be placed at least 3 m [10 ft] from the exhaust outlet.
3 Park the vehicle securely and make sure that the parking brake is applied.
• Set the transmission in Park, if provided; otherwise in Neutral.
• Place heavy duty wheel chocks at the front and rear of at least two tires.
4 Set up a safe area around the vehicle exhaust, and use barriers to prevent any bystanders from entering within 1.5
m [5 ft] of the exhaust outlet.
• Make sure that a serviceable fire extinguisher is nearby.
• Check the exhaust system components, and confirm that there is nothing on or near the exhaust system surfaces
(such as tools, shop cloths, grease, debris or organic material).
5 Connect the INSITE™ electronic service tool and make sure that it is placed on a stable surface. Check that any
additional fault codes have been resolved and cleared. Initiate the stationary regeneration by selecting the "De-
Sulfur Regeneration Test" and follow the on-screen instructions to perform the process.
• Once the regeneration commences, the engine speed will initially remain at idle to allow the engine to warm-up.
This will be followed by a slow controlled acceleration to attain the appropriate elevated speed for regeneration. At