TSB190213-120920

1/2/2020
New Crankcase Pressure Relief Valve: Fault Codes 555 and 556
Technical Service Bulletin
Technical Service Bulletin: TSB190213
Released Date: 09-Dec-2019
New Crankcase Pressure Relief Valve: Fault Codes 555 and 556
New Crankcase Pressure Relief Valve: Fault Codes
555 and 556
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
B6.7N CM2380 B150B (2018 and 2019 engine model year only)
L9N CM2380 L124B
L9N CM2380 L130B
Issue
Symptom:
For L9N CM2380 L124B and L9N CM2380 L130B engines only:
Engine front gear cover deforms and contacts the engine crankshaft pulley, causing
a lubricating oil leak.
All Engines:
Fault Codes 555 and/or 556
Fault Codes 555 and/or 556 Root Cause:
Closed crankcase ventilation system blocked but has not malfunctioned.
Verification
Verify that the OEM supplied closed crankcase ventilation hoses are properly
routed. See Service Bulletin, Operation and Troubleshooting of Closed Crankcase Ventilation
(CCV) Systems for Automotive Natural Gas Engines, Bulletin 5579487
(/qs3/pubsys2/xml/en/bulletin/5579487.html).
Use INSITE™ electronic service tool to check for active or inactive counts of Fault Codes 555
or 556 in the last 25 engine hours.
On L9N CM2380 L124B and L9N CM2380 L130B engines only:
Inspect the front gear cover for signs of contact with the crankshaft pulley.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2019/tsb190213.html
1/4
1/2/2020
New Crankcase Pressure Relief Valve: Fault Codes 555 and 556
On B6.7N CM2380 B150B engines only:
Verify that the engine is model year 2018 or 2019 by looking in at the engine dataplate.
Figure 1 below shows the layout of a B6.7N CM2380 B150B engine dataplate.
The year listed in the text of the “IMPORTANT ENGINE INFORMATION” field will
indicate the model year of the engine.
This Technical Service Bulletin does not apply to B6.7N CM2380 B150B engines with a
model year other than 2018 or 2019.
Figure 1, B6.7N CM2380 B150B Dataplate.
Resolution
Verify that the engine has been operating at below freezing temperature 0°C [ 32°F ].
Install a crankcase pressure relief valve. See corresponding service manual. Reference
Procedure 001-132 in Section 1. See Table 2 below.
Description of Change
This TSB announces a new crankcase pressure relief valve to reduce occurrences of engine
damage due to a closed crankcase ventilation system that has been blocked by ice while operating
in below freezing conditions.
Reason for Change
The new crankcase pressure relief valve will reduce crankcase pressure if the closed crankcase
ventilation system is blocked with ice, while allowing the closed crankcase ventilation system to
work normally once the ice has melted and the resulting water has passed through the closed
crankcase ventilation system.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2019/tsb190213.html
2/4
1/2/2020
New Crankcase Pressure Relief Valve: Fault Codes 555 and 556
Customer Communication
This crankcase pressure relief valve is to prevent engine damage when engines are operated at
temperatures low enough for ice to form in the crankcase ventilation system. The crankcase
pressure relief valve should not be used to correct OEM crankcase ventilation hoses that are
improperly routed, which could lead to liquid water blocking the closed crankcase ventilation
system. See Service Bulletin, Operation and Troubleshooting of Closed Crankcase Ventilation
(CCV) Systems for Automotive Natural Gas Engines, Bulletin 5579487
(/qs3/pubsys2/xml/en/bulletin/5579487.html) for more information.
Service Parts Availability
Service parts are available. See Table 1 for part numbers.
Table 1, Service Parts
Part
Description
Service
Model Name
Existing
Part Number
Obsolete
Superseded
New Part
Number
Crankcase
Pressure
Relief Valve
B6.7N
CM2380
B150B
-
No
No
5529831
Crankcase
Pressure
Relief Valve
L9N CM2380
L124B
-
No
No
5521156
Part Compatibility
The crankcase pressure relief valve part numbers are not interchangeable.
Publications Affected
Table 2, Publications Affected
Manual Type
Service
Manual
Engine
B6.7N
CM2380
B150B
Bulletin
Number
5467665
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2019/tsb190213.html
Procedure
Title
Procedure
Section
Crankcase
Pressure
Relief Valve
Refer to
Procedure
001-132
(/qs3/pubsys
2/xml/en/proc
edures/527/5
27-001132.html).
1
3/4
1/2/2020
New Crankcase Pressure Relief Valve: Fault Codes 555 and 556
Table 2, Publications Affected
Manual Type
Service
Manual
Bulletin
Number
Engine
L9N CM2380
L124B
5467492
Procedure
Title
Procedure
Section
Crankcase
Pressure
Relief Valve
Refer to
Procedure
001-132
(/qs3/pubsys
2/xml/en/proc
edures/521/5
21-001132.html).
1
Document History
Date
2019-12-2
Details
Module Created
Last Modified: 09-Dec-2019
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2019/tsb190213.html
4/4