NHTSA ID Number: 10198317
Manufacturer Communication Number: TSB200110-052720
TSB/Document Date: 2021-06-28
Summary
This Technical Service Bulletin describes the verification and resolution of Engines operating in a low load and high idle duty cycle may experience elevated lubricating oil consumption and/or fault codes associated with high EGR temperature. This is an update to a previously submitted communication.
6/1/2021
Lubricating Oil Consumption in Low Load and High Idle Applications
Technical Service Bulletin
Technical Service Bulletin: TSB200110
Released Date: 27-May-2021
Lubricating Oil Consumption in Low Load and High Idle Applications
Lubricating Oil Consumption in Low Load and High Idle Applications
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices, nor does it authorize TRP or
Campaign actions.
Contents
Product Affected
Engines:
L9N CM2380 L124B
L9N CM2380 L130B
L9N CM2380 L142B
ISL G CM2180 (Only engines equipped with steel pistons)
Application:
Transit Bus 280 horsepower (L9N CM2380 L124B and L9N CM2380 L142B)
Transit Bus (L9N CM2380 L130B)
Yard Spotter
School Bus
Issue
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Lubricating Oil Consumption in Low Load and High Idle Applications
Engines operating in a low load and high idle duty cycle may experience oil consumption above published specification limit in
Lubricating Oil Consumption and Acceptable Limits, Service Bulletin 3379214, and fault codes associated with high EGR
temperature.
Root Cause
Obsolete piston rings were unable to fully seat with the cylinder liner with insufficient time (break-in period) under low load.
Verification
For ISL G CM2180: Verify if CPL is 5232 on the engine dataplate.
If not, review engine service repair history to determine if the engine is built with or upfitted with steel pistons.
For engines prior to engine serial number (ESN) 74765136, review engine service repair history to determine if the engine is
equipped with the obsolete piston rings.
Verify if the engine is equipped with obsolete piston rings:
Table 1, Obsolete Piston Rings Part Number
Engine
Description
Obsolete Part Number
Compression Piston Ring (Top Ring)
5364466
Compression Piston Ring (Intermediate
Ring)
5364467
L9N CM2380 L124B
L9N CM2380 L130B
ISL G CM2180
L9N CM2380 L124B
L9N CM2380 L130B
ISL G CM2180
The part numbers in table 1 were part of the obsolete kits mentioned in table 2:
Table 2, Obsolete Kits Part Numbers
Description
Piston Ring Kit (single cylinder)
Obsolete Part Number
Content
5406026
1 x Expander Ring
2 x Oil Ring
1 x Top Ring
1 x Intermediate Ring
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Lubricating Oil Consumption in Low Load and High Idle Applications
Table 2, Obsolete Kits Part Numbers
Description
Overhaul Kit
Obsolete Part Number
Content
5633416
6 x Piston Kit
6 x Cylinder Liner
6 x Piston Ring Kit
12 x Connecting Rod Bearing
1 x Lubrication Oil Filter
1 x Fuel Filter
1 x Lower Engine Gasket
1 x Upper Engine Gasket
1 x Spark Plug Kit
1 x Oil Cooler Core
Confirm that any of the following fault codes are present:
High EGR Temperature Fault Codes:
2961: Exhaust Gas Recirculation Temperature - Data Valid But Above Normal Operating Range - Least Severe Level
2962: Exhaust Gas Recirculation Temperature - Data Valid But Above Normal Operating Range - Moderately Severe
Level
Verify oil consumption is greater than the amount outlined in Lubricating Oil Consumption and Acceptable Limits, Service
Bulletin 3379214
Verify the EGR cooler is fouled or plugged . Reference Service Bulletin, EGR Cooler Reuse Guidelines, Bulletin 2883594.
Resolution
Follow the troubleshooting for Lubrication Oil Consumption in the Fault Code Troubleshooting Manual.
If no resolution is found, repair the engine using the overhaul kit listed in Table 4 below.
Replace fouled EGR cooler. Reference Service Procedure 011-019 EGR Cooler in Section 11.
Table 3, Piston Rings Part Numbers (Non-Saleable, Reference Only)
Description
New Part Number
Compression Piston Ring (Top Ring)
5627164
Compression Piston Ring (Intermediate Ring)
5627166
The new part numbers in table 3 are part of a saleable kits mentioned in table 4:
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Lubricating Oil Consumption in Low Load and High Idle Applications
Table 4, Saleable Part (Kit) Numbers
Description
New Part Number
Contents
KIT, OVERHAUL
5633625
6 x Piston Kit (steel)
6 x Cylinder Liner
6 x Piston Ring Kit
12 x Connecting Rod Bearing
1 x Lubrication Oil Filter
1 x Fuel Filter
1 x Lower Engine Gasket
1 x Upper Engine Gasket
1 x Spark Plug Kit
1 x Oil Cooler Core
Manual Type
Engine
Bulletin Number
Fault Code / Symptom
Fault Code Troubleshooting
Manual
L9N CM2380 L124B
5467495
2961, 2962
Fault Code Troubleshooting
Manual
L9N CM2380 L124B
5467495
Lubricating Oil Consumption
Fault Code Troubleshooting
Manual
L9N CM2380 L130B
5613179
2961, 2962
Fault Code Troubleshooting
Manual
L9N CM2380 L130B
5613179
Lubricating Oil Consumption
Fault Code Troubleshooting
Manual
L9N CM2380 L142B
5659918
2961, 2962
Fault Code Troubleshooting
Manual
L9N CM2380 L142B
5659918
Lubricating Oil Consumption
Fault Code Troubleshooting
Manual
ISL G CM2180
4021658
2961, 2962
Overhaul Kit
Cummins
Part Name
Publications Affected
Table 5, Products Affected
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Lubricating Oil Consumption in Low Load and High Idle Applications
Table 5, Products Affected
Manual Type
Engine
Bulletin Number
Fault Code / Symptom
Fault Code Troubleshooting
Manual
ISL G CM2180
4021658
Lubricating Oil Consumption
Document History
Date
Details
2020-5-12
Module Created
2021-3-19
Addition of L9N CM2380 L142B and other changes.
2021-3-19
Typo correction.
2021-5-27
Added reference to Service Bulletin 2883594. Updated Resolution section to include reference
to Table 4. Updated Table 4.
Last Modified: 27-May-2021
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TSB/Document ID: TSB200110-052720
Replacement Service Bulletin Number:
MFR Communication Date: 2021-05-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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