Service Campaign S7567

Jan 20, 2022

Electronic Pressure Relief Valve (EPRV) Delete & Fuel Rail Pressure Sensor
Update
Service Category Service Department
Section Function Group 237
Technician Skill Level A

Market North America

Applicability
Mack
Model Years
2018 - 2020

Models
AN/CHU/CXU/GR/GI/PI/MRU/LR/TE

Introduction
Mack Trucks has identified through Remote Diagnostics that the vehicles in this Service Campaign have
experienced faults with the Electronic Pressure Relief Valve (EPRV). To address this issue follow the repair
outlined within this bulletin to remove the EPRV, inspect the Fuel Rail Pressure Sensor (FRPS) and wiring harness,
followed by running an accessory kit to reprogram the vehicle.
Production Change Information
This bulletin applies to vehicles built within the specified production changes below.
Brand
Engine Emission Level
Starting Build Date
Ending Build Date
EM-USA17, OBDEP-A/
Mack
MP7/MP8
14-November-2016
04-May-2020
OBDEP-B/OBDEP-C
Reimbursement
This repair is covered by an authorized Service Program.
Reimbursement is obtained through the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
Labor Code
Description

B
Hours

2373-01-09-01 (Main)

Valve, common rail remove

0.6 hrs

1700-22-03-06

Accessory Kit, programming

0.1 hrs

2841-22-02-01

ECM and ACM, Reprogramming

0.4 hrs

2115-03-02-02

Valve Cover, Replacement

Use Impact Time
(0.9 - 1.9 hr.)

If Applicable
2373-03-03-06
2861-03-03-03

Causal Part
SCC Authorization Code

Pressure Sensor, Common Rail,
Replacement, Valve Cover Removed
Wiring Harness, Injector, Replacement
(Rear), Valve Cover removed
22720232

S7567

0.2 hrs
Use Impact Time
(0.3-0.4 hrs)

Jan 20, 2022

Service Campaign S7567

EPRV Delete & FRPS Update
Expiration Date

March 31, 2022

Parts Information
Special Order Information if applicable
Configuration

Part Numbers

Part Names

Quantity

All

85156544

EPRV delete kit

1

If Applicable Parts (Reference Step 18)
13L Engine Only

23488939

Pressure Sensor, F2
Common Rail

1

13L Engine Only

23502054

Wiring Harness, Rear

1

11L Engine Only

23488937

Pressure Sensor, F2
Common Rail

1

11L Engine Only

23502057

Wiring Harness, Rear

1

Required Tools & Equipment
•

Premium Tech Tool (PTT) with latest version

•

88800634 - Wrench

Calibration Information
•

Accessory Kit: 85156014

Repair Procedure
1. Refer to IMPACT document ID: 2115-03-02-02 Valve Cover, Replacement for valve cover removal
procedure.
2. Loosen the cap nuts
3. Remove and discard the pipe.

4. Disconnect the connector.

Service Campaign S7567

Jan 20, 2022

EPRV Delete & FRPS Update

5. Clean the area around the fitting.
6. Remove the fitting and seal.

7. Install the seal and plug in the cylinder head.
Tightening torque
Cylinder head, plug

36± 6 lbf-ft.
(50 ± 8 Nm)

8. Install the tool. 88800634
9. Remove the valve.
Note: Use a spanner as a counterhold to prevent the common rail brackets and pressure

Service Campaign S7567

Jan 20, 2022

EPRV Delete & FRPS Update
pipes from being loaded during component removal and installation.

10. Install the protecting plug.
Required material
Protecting plug

88800527

11. Clean the threads.
Note: Leave the protecting plug in place until installing the common rail plug.

Service Campaign S7567

Jan 20, 2022

EPRV Delete & FRPS Update

12. Remove the protecting plug.
13. Install the plug in the rail.
Note: Do not use locking fluid or thread sealant
14. Torque tighten the plug.
Tightening torque
Common rail, plug

92± 7 lbf–ft.
(125 ± 10 Nm)

Note: Cap is not required to seal the common rail where the drain pipe connected.

Jan 20, 2022

Service Campaign S7567

EPRV Delete & FRPS Update

Note: Use a spanner as a counterhold to prevent the common rail brackets and pressure pipes from
being loaded during component removal and installation
15. Cut the harness.
16. Remove connector and harness.

Note: Do not tape or seal the end of the harness
17. A product improvement has been made to the Fuel Rail Pressure Sensor (FRPS) and its wiring harness. A
visual Inspection of the FRPS electrical connector will indicate which sensor and wiring harness is on the
vehicle


Old style Connection


New Improved Connector

Service Campaign S7567

Jan 20, 2022

EPRV Delete & FRPS Update
18. Inspect the FRPS, if the Old Style Connector is found (Displayed above with red X), replace the sensor
and wiring harness per Impact Instructions listed below. If the New Improved Connector is found, no
farther action is needed and proceed to next step.
a. 2373-03-03-06 Pressure Sensor, Common Rail, Replacement, Valve Cover Removed
b. 2861-03-03-03 Wiring Harness, Injector, Replacement (Rear), Valve Cover Removed
19. Refer to IMPACT document ID: 2115-03-02-02 Valve Cover, Replacement for valve cover install
procedure.
20. Using PTT Operation 1700-22-03-06 Program accessory kit: 85156014
Note: Running this kit without removing the ePRV will result in adverse vehicle affects.