NHTSA ID Number: 10190757
Manufacturer Communication Number: TSB210055-030420
TSB/Document Date: 2021-04-26
Summary
This Technical Service Bulletin describes the availability of new high-pressure injector supply lines, fuel supply line, and fuel supply line braces when an existing component within the fuel system may be malfuctioning.
3/25/2021
New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Technical Service Bulletin
Technical Service Bulletin: TSB210055
Released Date: 04-Mar-2021
New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line,
and Fuel Supply Line Braces
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
ISC CM2150
ISC CM2250
ISC CM2350
ISC CM850
ISL9 CM2250
ISL9 CM2350 L101
ISL9 CM2350 L111
L9
CM2350 L116B
L9 CM2350 L119B
L9 CM2350 L120C
L9 CM2350 L123B
L9 CM2350 L129C
QSC8.3 CM2250
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
QSL9 M CM2250 L106
Description of Change
A new fuel rail is available along with new high-pressure injector supply lines, fuel supply line, and fuel supply line braces. The new
fuel rail is not compatible with the existing high-pressure injector supply lines.
Service Instructions
If existing fuel rail has malfunctioned, replace with the new fuel rail.
New high-pressure injector supply lines must be used with the new fuel rail.
New fuel supply line and new fuel supply line braces must be used with the new fuel rail.
If the existing high-pressure injector supply line has malfunctioned, replace with new high-pressure injector supply line.
Do not replace the fuel rail.
If the existing fuel supply line has malfunctioned, replace with new fuel supply line.
Do not replace the fuel rail.
Service Parts Availability
Service parts are available. See Table 1 for part numbers.
Table 1, Service Parts
Quantity
New Part
Number
Injector
Supply
Number
Yes
1
5594271
-
No
No
1
5482141
-
4989322
No
No
1
5482142
-
5336420,
4937931
Yes
Yes
1
5481953
1
5333472,
4937932,
5285790
Yes
Yes
1
5525525
2
5292964,
5266056
Yes
Yes
1
5481947
3
Part
Description
Existing Part
Number
Obsolete
Superseded
Accumulator
4307377
Yes
4989442
Brace, Tube
Tube, Injector
Fuel Supply
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Table 1, Service Parts
Part
Description
Quantity
New Part
Number
Injector
Supply
Number
Yes
1
5481951
4
Yes
Yes
1
5481949
5
5292967,
4936196
Yes
Yes
1
5481948
6
5333474,
4980581,
5285791
Yes
Yes
1
5525526
-
Existing Part
Number
Obsolete
Superseded
5333473,
4937934
Yes
5292969,
4937935
Part Compatibility
New fuel rail is only compatible with new high-pressure injector supply lines, and fuel supply line and fuel supply line braces.
Existing fuel rail is compatible with either existing or new high-pressure injector supply lines, and fuel supply line and fuel supply
line braces.
Part Identification
All parts colors are for illustration purpose only and do not reflect the actual color of the parts.
1. New fuel rail can be identified by the shape.
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 1, New Fuel Rail.
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 2, Existing Fuel Rail.
2. High pressure injector supply lines can be identified by the shape.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 3, New High-Pressure Injector Supply Line, Part Number 5481953 (Injector 1).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 4, Existing High-Pressure Injector Supply Line, Part Number 4937931 (Injector 1).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 5, New High-Pressure Injector Supply Line, Part Number 55525525 (Injector 2).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 6, Existing High-Pressure Injector Supply Line, Part Number 4937932 (Injector 2).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 7, New High-Pressure Injector Supply Line, Part Number 5481947 (Injector 3).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 8, Existing High-Pressure Injector Supply Line, Part Number 5266056 (Injector 3).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 9, New High-Pressure Injector Supply Line, Part Number 5481951 (Injector 4).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 10, Existing High-Pressure Injector Supply Line, Part Number 4937934 (Injector 4).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 11, New High-Pressure Injector Supply Line, Part Number 5481949 (Injector 5).
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 12, Existing High-Pressure Injector Supply Line, Part Number 4937935 (Injector 5).
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 13, New High-Pressure Injector Supply Line, Part Number 5481948 (Injector 6).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 14, Existing High-Pressure Injector Supply Line, Part Number 4936196 (Injector 6).
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2021/tsb210055.html
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 15, New Fuel Supply Line, Part Number 5525526 (Pump to Rail).
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 16, Existing Fuel Supply Line, Part Number 5285791 (Pump to Rail).
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New Fuel Rail, High Pressure Injector Supply Lines, Fuel Supply Line, and Fuel Supply Line Braces
Figure 17, Existing Fuel Supply Line, Part Number 4980581 (Pump to Rail).
Document History
Date
2021-3-4
Details
Module Created
Last Modified: 04-Mar-2021
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TSB/Document ID: TSB210055-030420
Replacement Service Bulletin Number:
MFR Communication Date: 2021-03-04
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, GASOLINE
MFR Component System:
MFR Component Subsystem:
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