NHTSA ID Number: 11030941
Manufacturer Communication Number: TSB140019
TSB/Document Date: 2026-04-07
Summary
This Technical Service Bulletin, in conjunction with the information provided within the manuals listed in Table 1, provides inspection and repair guidelines following the malfunction of an XPI fuel pump pumping plunger and/or roller tappet assembly. This is a revision to a previously submitted communication.
Technical Service Bulletin
Technical Service Bulletin: TSB140019
Fuel Pump - Plunger and Tappet Roller Inspection and Repair
Released Date: 25-Mar-2026
Fuel Pump - Plunger and Tappet Roller Inspection and Repair
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
ISL9 CM2350 L101
ISX12 CM2350 X102
ISX12/ISX11.9 CM2250
ISX15
CM2250
ISX15 CM2250 SN
ISX15 CM2350 X101
PowerGen QSX15 CM2250
PowerGen QSX15 CM2250 ECF
QSX11.9 CM2250 ECF
QSX15 CM2250 ECF
QSX15 CM2350 X105
QSX15 CM2350 X106
X15 CM2350 X114B
X15 CM2350 X116B
X15 CM2450 X124B
X15 CM2450 X134B
X15 CM2450 X142B
This document, in conjunction with the information provided within the manuals listed in Table 1 provides inspection and repair guidelines following the malfunction of a
fuel pump pumping plunger and/or roller tappet assembly.
The level of progressive damage to the fuel pump and other engine components will vary with every incident; however, the repair direction will depend on only a few key
criteria.
Previous versions of this document provided specific repair directions according to the vintage of the fuel pump and type of pumping plungers. Repair directions have
now been made common and apply to all fuel pumps regardless of vintage, pumping plunger type, or tappet roller assembly type.
Figure 1, Damaged Fuel Pump Tappet Roller Assembly.
Figure 2, Example of Severe Wear on Camshaft Lobe.
Preliminary Inspection and Repair Direction for all Fuel Pump Malfunctions
If severe camshaft or tappet roller wear is found, see scenarios below.
Scenario 1: The fuel pump tappet rollers are damaged or pumping plunger damage is found:
Remove, cut open, and inspect the lubricating oil filter for debris. See Procedure 007-083 in Table 2.
Connect INSITE™ electronic service tool to the service tool data link and review any logged fault codes.
Reference Table 1 below for repair direction.
Scenario 2: The fuel pump tappet rollers and pumping plungers are not damaged:
Connect INSITE™ electronic service tool to the service tool data link and review any logged fault codes. Follow appropriate fault code or symptom based
troubleshooting in EDS or QuickServe® Online (QSOL).
Table 1, Repair Direction Decision Matrix
Symptoms
Non-wear debris or particles are evident in the
lubricating oil filter element.
Fault Codes 415 or 143 are logged in the engine
control module (ECM) within the last 8 hours of
engine operation.
Engine is seized, or engine rotating assembly
produces abnormal noise.
Are Any Symptoms Present?
Repair Direction to Follow
Yes
Repair Direction A
No
Repair Direction B
CAUTION
Immediately upon removal of the lubricating oil cooler assembly, a plug must be inserted into the housing and cylinder block oil passage drillings. Failure to insert
the oil passage plug can result in a bearing failure, crankshaft failure, or both.
CAUTION
Do not allow dirt or foreign material to enter oil passages in the cylinder block when cleaning the gasket sealing surfaces. Connecting rod bearing failures can be
caused if debris is introduced into the cylinder block or lubricating oil cooler housing oil passages. Therefore, use of power tools combined with abrasive pads to
clean gasket surfaces is not recommended.
Repair Direction A:
1. Drain lubricating engine oil. See Procedure 007-037 in Table 2.
2. Remove lubricating oil pan, and clean thoroughly. See procedure 007-025 in Table 2.
3. Remove and inspect lubricating oil pump for reuse. See Procedure 007-031 in Table 2.
4. Remove number 1 and number 4 main bearing caps and main bearings. See procedure 001-006 in Table 2.
5. Inspect number 1 and number 4 main journals of crankshaft for reuse. See Service Bulletin Crankshaft Reuse Guidelines for Cummins® Engines, Bulletin 5411180.
If crankshaft meets reuse guidelines:
Inspect number 1 and number 4 main bearings for signs of significant debris embedding. If significant debris is found, remove number 1 and number 4
connecting rod bearings for inspection.
If damage is observed on number 1 and number 4 connecting rod bearings, roll new connecting rod bearings in on all six journals. See Procedure 001006, 001-007, and 001-014 in Table 2.
Roll new main bearings in on all seven main journals and install new thrust bearings on number 4 main journal.
If crankshaft does not meet reuse guidelines:
Dealers should contact RAPIDSERVE™ Catastrophic group for pre-authorization if engine is under warranty.
Cummins® Distributors should follow their local catastrophic process or contact RAPIDSERVE™ for repair direction if engine is under warranty.
6. Inspect fuel pump for internal damage. See Procedure 005-016 in Table 2 below.
7. Thoroughly clean lubricating oil cooler housing. See Procedure 007-003 in Table 2.
8. Replace following lubricating oil system components:
Lubricating oil cooler element. See Procedure 007-007 in Table 2.
Lubricating oil filter bypass valve. See Procedure 007-014 in Table 2.
Lubricating oil thermostat. See Procedure 007-039 in Table 2.
9. Install lubricating oil pan and other components removed to access main bearings. See procedure 007-025 in Table 2
10. Install a new lubricating oil filter. See Procedure 007-013 in Table 2.
11. Prime and fill the engine with new lubricating oil. See Procedure 007-037 in Table 2.
12. Perform an aftertreatment diesel particulate filter (DPF) regeneration. See Procedure 014-013 in Table 2.
13. Perform a second lubricating oil and lubricating oil filter change. Priming lubricating oil system a second time is not required. See Procedure 007-013 and 007-037
in Table 2.
Repair Direction B:
1. Inspect the fuel pump for internal damage. If damage is found, replace fuel pump assembly. See Procedure 005-016 in Table 2.
2. Drain the engine lubricating oil and remove the lubricating oil filter. See Procedure 007-013 and 007-037 in Table 2.
3. Replace the lubricating oil filter bypass valve. See Procedure 007-014 in Table 2.
4. Fit a new lubricating oil filter and refill the engine lubricating oil system. Priming the lubricating oil system is not required. See Procedure 007-013 and 007-037 in
Table 2.
Table 2, Associated Procedures
Procedure Title
Procedure Number
Service Model Name
Bulletin Number
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/13
2/132-005-016-tr-mixar5.html)
ISX15 CM2250
4022250
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/17
5/175-005-016-tr.html)
ISX15 CM2250 SN
4310736
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/13
3/133-005-016-tr-mixab.html)
ISX12/ISX11.9 CM2250
2883445
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/17
3/173-005-016-tr-prix13.html)
ISX15 CM2350 X101
4310641
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/13
2/132-005-016-tr-vqxi6.html)
QSX15 CM2250 ECF
2883557
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/13
3/133-005-016-tr-vqxb.html)
QSX11.9 CM2250 ECF
2883561
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/25
0/250-005-016-tr.html)
QSX15 CM2350 X105
4332667
Fuel Pump
Refer to Procedure 005-016
(/qs3/pubsys2/xml/en/procedures/22
1/221-005-016-tr.html)
QSX15 CM2350 X106
4332712
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/13
2/132-005-227-tr-mixar5.html)
ISX15 CM2250
4022250
Fuel Pump
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/17
5/175-005-227-tr.html)
ISX15 CM2250 SN
4310736
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/13
3/133-005-227-tr-mixab.html)
ISX12/ISX11.9 CM2250
2883445
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/17
3/173-005-227-tr-prix13.html)
ISX15 CM2350 X101
4310641
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/13
2/132-005-227-tr-vqxi6.html)
QSX15 CM2250 ECF
2883557
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/13
3/133-005-227-tr-vqxb.html)
QSX11.9 CM2250 ECF
2883561
Table 2, Associated Procedures
Procedure Title
Procedure Number
Service Model Name
Bulletin Number
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/25
0/250-005-227.html)
QSX15 CM2350 X105
4332667
Fuel Pump Head
Refer to Procedure 005-227
(/qs3/pubsys2/xml/en/procedures/22
1/221-005-227.html)
QSX15 CM2350 X106
4332712
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/13
2/132-007-003-tr-mixar5.html)
ISX15 CM2250
4022250
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/17
5/175-007-003-tr.html)
ISX15 CM2250 SN
4310736
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/13
3/133-007-003-tr-mixab.html)
ISX12/ISX11.9 CM2250
2883445
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/17
3/173-007-003-tr-prix13.html)
ISX15 CM2350 X101
4310641
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/13
2/132-007-003-tr-vqxi6.html)
QSX15 CM2250 ECF
2883557
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/13
3/133-007-003-tr-vqxb.html)
QSX11.9 CM2250 ECF
2883561
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/25
0/250-007-003-tr.html)
QSX15 CM2350 X105
4332667
Lubricating Oil Cooler
Refer to Procedure 007-003
(/qs3/pubsys2/xml/en/procedures/22
1/221-007-003-tr.html)
QSX15 CM2350 X106
4332712
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/13
2/132-007-007-tr-mixar5.html)
ISX15 CM2250
4022250
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/17
5/175-007-007-tr.html)
ISX15 CM2250 SN
4310736
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/13
3/133-007-007-tr-mixab.html)
ISX12/ISX11.9 CM2250
2883445
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/17
3/173-007-007-tr-prix13.html)
ISX15 CM2350 X101
4310641
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/13
2/132-007-007-tr-vqxi6.html)
QSX15 CM2250 ECF
2883557
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/13
3/133-007-007-tr-vqxb.html)
QSX11.9 CM2250 ECF
2883561
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/25
0/250-007-007.html)
QSX15 CM2350 X105
4332667
Lubricating Oil Cooler Element
Refer to Procedure 007-007
(/qs3/pubsys2/xml/en/procedures/22
1/221-007-007.html)
QSX15 CM2350 X106
4332712
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/13
2/132-007-013-tr-mixar5.html)
ISX15 CM2250
4022250
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/17
5/175-007-013-tr.html)
ISX15 CM2250 SN
4310736
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/13
3/133-007-013-tr-mixab.html)
ISX12/ISX11.9 CM2250
2883445
Table 2, Associated Procedures
Procedure Title
Procedure Number
Service Model Name
Bulletin Number
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/17
3/173-007-013-tr-prix13.html)
ISX15 CM2350 X101
4310641
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/13
2/132-007-013-tr-vqxi6.html)
QSX15 CM2250 ECF
2883557
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/13
3/133-007-013-tr-vqxb.html)
QSX11.9 CM2250 ECF
2883561
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/25
0/250-007-013-tr.html)
QSX15 CM2350 X105
4332667
Lubricating Oil Filter (Spin-On)
Refer to Procedure 007-013
(/qs3/pubsys2/xml/en/procedures/22
1/221-007-013-tr.html)
QSX15 CM2350 X106
4332712
Lubricating Oil System
- The world’s #1 fuel additive for both gasoline and diesel...
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TSB/Document ID: TSB140019
Replacement Service Bulletin Number:
MFR Communication Date: 2026-03-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
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