FSB-221-010

SB-10052361-3686
Mack Trucks, Inc.
Greensboro, NC USA
Field Service Bulletin
Trucks
Date
Group
No.
Release
Page
6.2013
221
010
01
1(5)
Diagnostic Trouble Codes (DTC’s), Low Oil
Pressure (SPN 100 FMI 1)
CXU, GU, LEU, MRU
MP7 EPA2010
FSB 221-010, Diagnostic Trouble Codes (DTCs),
Low Oil Pressure (SPN 100 FMI 1)
(June 2013)
Information
During long hard pull conditions, Diagnostic Trouble Codes (DTC’s) SPN 100 FMI 1 can log
on certain CXU, GU, LEU, and MRU MACK Trucks with MP7 EPA2010 engines. If a SPN 100
FMI 1 occurs during the conditions described in this bulletin, with or without an engine shut
down lamp, follow Guided Diagnostics (GD) for fault tracing.
Follow GD fault tracing and verify the oil pressure readings with a manual gauge at various
engine revolutions per minute (RPMs). After verifying all checks are within specification, the
issue is still present, and there are no obvious signs of oil dilution, replace the pressure
reduction valves as follows:
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: This bulletin does not apply to MACK Trucks Australia.
Required Parts
W2082018
PV729-FSB221-010_M
USA59649
Mack Trucks, Inc.
Field Service Bulletin
Date
6.2013
Group
No.
Release
221
010
01
W2082019
Required Parts
Item #
Part Number
1
22192217
2
Description
QTY
Pressure Reduction (Regulating) Valve (Blue Mark)
1
469846
O-Ring, Internal
2
3
949659
O-Ring, Cover
1
4
22188378
Pressure Reduction (Relief) Valve (Lilac Mark)
1
5
21634021
Engine Piston Cooling Oil pressure Sensor
1
6
21634021
Engine Oil Pressure (EOP) Sensor
1
Procedure
You must read and understand the precautions and guidelines in Service Information,
Function Group 2, “General Safety Practices, Engine” 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.
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Mack Trucks, Inc.
Field Service Bulletin
Date
6.2013
Group
No.
Release
221
010
01
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 and replace the oil pressure reduction valve with pressure reduction (regulating)
valve part number 22192217, replace the internal o-ring with part number (469846), and
replace cover o-ring with part number (949659) in the oil filter housing. Tighten cover
fasteners to 10 ± 2 Nm (88 ± 17 in-lbs).
W2078871
Note: During installation of the reduction valves, the cover must be flat against the oil filter
housing before the bolts are installed to ensure the valve is seated flush against the
sealing surface.
W2082022
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Mack Trucks, Inc.
Field Service Bulletin
Date
6.2013
Group
No.
Release
221
010
01
4 Remove and replace the EOP Sensor (6) and Engine Piston Cooling Oil pressure Sensor
(5) with new sensor part number 21634021. Tighten sensors to 30 ± 5 Nm (22 ± 4 ft-lbs).
W2078872
5 Remove the oil pan per instructions in Impact, Procedure 2171-03-02-01 Oil Pan,
Replacement.
6 Remove and replace the pressure reduction (relief) valve in the oil valve body with part
number (22188378), and replace the internal o-ring with part number (469846). Tighten
cover fasteners to 10 ± 2 Nm (88 ± 17 in-lbs).
W2082023
7 Install the oil pan per instructions in Impact, Procedure 2171-03-02-01 Oil Pan,
Replacement.
8 Refill the engine oil to the proper level.
9 Reconnect all previously removed cables to the negative (ground) battery terminals.
10 Start engine, check for leaks and proper operation. Clear any diagnostic trouble codes
(DTC).
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Mack Trucks, Inc.
Field Service Bulletin
Date
6.2013
Group
No.
Release
221
010
01
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.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
01
Labor Code
Primary Labor Code
2192C-36-80
3.1 hrs.
Causal Part
3826265
MACK Trucks North America engages in a comprehensive program of testing and evaluating
to provide the best possible product. MACK Trucks North America however, is not committed
to, or liable for updating existing vehicles.
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