TSB150180-110915

New Low Pressure Regulator Fuel Control Cover
Page 1 of 5
Technical Service Bulletin Number
TSB150180
Technical Service Bulletin
Subject
New Low Pressure Regulator Fuel Control Cover
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


ISL G CM2180
ISX12 G CM2180 EJ
Issue
The low pressure regulator can collect condensation from the charge air cooler through the
boost reference line. If the level of water reaches the reference port in the low pressure
regulator, the low pressure regulator can freeze after the engine is shut down in ambient
conditions below 0°C [ 32°F ].
Typical symptoms associated with this problem are:




Check engine light
STOP ENGINE light
Rough running
Fault Codes 2722, 2723, and/or 2991 for engine regulator outlet fuel pressure after start
up when ambient conditions are below 0°C [ 32°F ].
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2015/tsb150180.html
3/1/2016
New Low Pressure Regulator Fuel Control Cover
Page 2 of 5
Verification
Perform the following to verify if the low pressure regulator fuel control cover has
malfunctioned:
1. Connect INSITE™ electronic service tool.
2. Check for fuel pressure Fault Codes 2722, 2723 and/or 2991.
3. If active or inactive fuel pressure fault codes are present, verify with the operator that the
check engine light and/or rough running symptoms occurred at initial startup when
ambient conditions were below 0°C [ 32°F ].
4. If the symptoms and fault codes occurred when ambient conditions were below 0°C [ 32°
F ], remove the low pressure regulator fuel control cover.
 See ISL G CM2180 Service Manual, Bulletin 4021649. Refer to Procedure 005-047
in Section 5.
 See ISX12 G CM2180 EJ Service Manual, Bulletin 4310682. Refer to Procedure
005-047 in Section 5.
5. Check for moisture or signs of moisture in the low pressure regulator fuel control cover.
See Figure 1 below.
Figure 1, Low Pressure Regulator Fuel Control Cover Malfunction Identified by Signs of
Moisture
Resolution
The low pressure regulator fuel control cover is to be replaced only if all three of the following
conditions exist:
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2015/tsb150180.html
3/1/2016
New Low Pressure Regulator Fuel Control Cover



Page 3 of 5
Fault Codes 2722, 2723, or 2991 are active
Ambient temperature at the time of the symptoms was below 0°C [ 32°F ]
Moisture is found in the low pressure regulator fuel control cover
If all conditions have been met, replace the low pressure regulator fuel control cover with new
part number 5347803.


See ISL G CM2180 Service Manual, Bulletin 4021649. Refer to Procedure 005-047 in
Section 5.
See ISX12 G CM2180 EJ Service Manual, Bulletin 4310682. Refer to Procedure 005-047
in Section 5.
Service Instructions
The low pressure regulator fuel control cover must be installed with the boost reference line
fitting at the bottom. See Figure 2 and 3 below.
Figure 2, New Low Pressure Regulator Fuel Control Cover, Installed on ISL G CM2180 EJ
Low Pressure Housing
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2015/tsb150180.html
3/1/2016
New Low Pressure Regulator Fuel Control Cover
Page 4 of 5
Figure 3, New Low Pressure Regulator Fuel Control Cover Installed on ISX12 G CM2180
EJ Low Pressure Housing
Service Parts Availability
Low pressure regulator fuel control cover, Part number 5347803, has been released to prevent
moisture from entering the boost reference side of the low pressure regulator. The boost
reference line fitting has been relocated to the bottom of the new low pressure regulator fuel
control cover, which will prevent water pooling inside as shown in Figure 1 above.
Table 1, Service Parts
Part Description
Existing Part
Number
Obsoleted Superseded
New Part
Number
Low Pressure Regulator Fuel
Control Cap
3970602
Yes
5347803
Yes
Document History
Date
2015-11-9
Details
Module Created
Last Modified: 25-Feb-2016
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2015/tsb150180.html
3/1/2016
New Low Pressure Regulator Fuel Control Cover
Page 5 of 5
Copyright © 2000-2010 Cummins Inc. All rights reserved.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2015/tsb150180.html
3/1/2016