FSB 221-010

Mack Trucks
Greensboro, NC USA
Field Service Bulletin
Trucks
This Field Service Bulletin replaces, “FSB 221-010_M, Diagnostic Trouble
Codes (DTCs), Low Oil Pressure”, (USA70648) dated (08/2015).
Date
Group
No.
Release
Page
5.2016
221
010
04
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Diagnostic Trouble Codes (DTCs), Low Oil
Pressure
CXU, GU, LEU, MRU
MP7 US2010, OBD2013, US2014, OBD2015
FSB 221-010, Diagnostic Trouble Codes (DTCs),
Low Oil Pressure
(May 2016)
Information
During long hard pull conditions, diagnostic trouble codes (DTC) SPN 100 FMI 1 or P052400
can log, or engine shut down may occur on certain high mileage MACK CXU, GU, LEU and
MRU vehicles built between January 1, 2010 and April 2, 2015 with MP7 engines. These
DTC may occur during the conditions described in this bulletin, with or without an engine shut
down lamp.
If there are no obvious signs of oil dilution, replace the pressure reduction valve, oil cooler
and piston cooling nozzles using the procedure below. Also reprogram the engine control
module if required based on the table below.
Note: Drain all engine oil into a clean container for reuse. Do not reuse engine oil if it is not
reusable or the engine is due for normal oil change service.
Note: Check chassis repair history to determine if the repairs outlined in this bulletin have
been previously done or not. If the updates outlined in this bulletin have not been done,
continue with the repairs outlined in this bulletin. If all updates have been done and the
engine is still faulting for low oil pressure, open an eService case to report the issue.
PV729-FSB221-010_M
USA76402
Mack Trucks
Field Service Bulletin
Date
5.2016
Group
No.
Release
221
010
04
Required Parts
W2084376
Required Parts
Item
Part Number
3
469846
4
22416685
Description
Quantity
O-Ring, Internal
1
Pressure Reduction (Relief) Valve, Purple
1
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Mack Trucks
Field Service Bulletin
Date
5.2016
Group
No.
Release
221
010
04
W2006072
Part Number
Description
Quantity
85125094
Oil Cooler Kit
1
993664
O-Ring (substitute for
40471626 in oil cooler kit)
1
85116577
Turbocharger Installation Kit
1
85124530
EGR Cooler Kit
1
W2103580
Item
Part Number
Description
Quantity
2
994445
M8*16 Piston Cooling Nozzle Screws
6
3
22577447
Piston Cooling Nozzle
6
Page
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Mack Trucks
Field Service Bulletin
Date
5.2016
Group
No.
Release
221
010
04
Check Engine Control Module Software Level
W2103598
US2010 and US2010 + 6 Control Unit Information
US2010, January 1,
2010 to May 8, 2011
Data Set 2
US2010 + 6, May 9,
2011 to December
31, 2012
(Includes LEU and
MRU)
22494237 or less
Proceed with
software update
22709801 or higher
No programming
necessary
22488261 or less
Proceed with
software update
22711499 or higher
No programming
necessary
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Mack Trucks
Field Service Bulletin
Date
5.2016
Group
No.
Release
221
010
04
W2102733
OBD 2013, US2014 (GHG) and OBD2015 Control Unit Information
OBD 2013, January
1, 2013 to
December 31, 2013
Main Software Part
Number
US2014 (GHG),
January 1, 2014 to
December 31, 2014
OBD2015, January
1, 2015 to March 24,
2015
22578181 or less
Proceed with
software update
22672847 or higher
No programming
necessary
22572319 or less
Proceed with
software update
22665162 or higher
No programming
necessary
22616343 or less
Proceed with
software update
22644017 or higher
No programming
necessary
Page
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Mack Trucks
Field Service Bulletin
Date
5.2016
Group
No.
Release
221
010
04
Procedure
You must read and understand the precautions and guidelines in Service Information,
Function Group 20, “Engine Safety Practices” before performing this procedure. If you are
not properly trained and certified in this procedure, ask your supervisor for training before
you perform it.
DANGER
Do not attempt to repair or service this vehicle without having sufficient training, the correct
service literature and the proper tools. Failure to follow this could make the vehicle unsafe
and lead to serious personal injury or death.
1 Secure the vehicle for service by parking it on a flat level surface, applying the parking
brake, chocking the rear wheels, and placing the transmission in neutral or park.
2 Disconnect all battery cables from the negative (ground) battery terminals to prevent
personal injury from electrical shock and prevent damage to electrical components.
3 Remove the oil pan. Refer to Function Group 21.
4 Remove and replace the pressure reduction (relief) valve in the oil valve body and replace
the internal O-ring. Tighten cover fasteners to 10 ±2 Nm (88 ±17 in-lbs).
W2082023
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Mack Trucks
Field Service Bulletin
Date
5.2016
Group
No.
Release
221
010
04
Note: Make sure the valve is fully seated and the cover close to the valve housing prior to
threading in the retaining screws. Otherwise the valve can make contact with the edge just
ahead of the seating surface and damage the valve. Do not use power tools to install this
valve. Do NOT disturb the pressure reduction valve located in the oil filter housing.
W2102180
5 Remove and replace the piston cooling nozzles. Refer to Function Group 22. Replace the
single use screws. Tighten the new screws to 24 ±3 Nm (18 ±2 ft-lb).
6 Remove and replace the oil cooler. Refer to Function Group 223.
7 Install the oil pan. Refer to Function Group 21.
8 Refill the engine oil to the proper level.
9 Reconnect all previously removed cables to the negative (ground) battery terminals.
10 Reprogram the engine control module if required based on the reference table. Refer to
Function Group 28.
11 Start engine, check for leaks and proper operation. Clear any DTC.
Reimbursement
This repair may be eligible for reimbursement if a product failure was experienced within time
and mileage limits of the applicable Warranty coverage. Reimbursement is obtained via the
normal claim handling process.
MACK Trucks reserves the right to make any changes in design or to make additions to or
upon its products without incurring any obligations to install the same on vehicles previously
built.
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