Remove the right side thermostat housing mounting bolts. See Fig. 2. Discard the bolts.

1. Bolts
Fig. 2, Thermostat Housing Mounting Bolts, Right Side

11.

Remove the remaining left side thermostat housing mounting bolt and retain it for installation.

12.

Remove the thermostat housing and thermostat. Discard the thermostat.

13.

Clean the oil coolant module and thermostat housing mounting surfaces.

14.

Install the thermostat housing with a new thermostat in place, using only the original left side mounting
bolt. Hand tighten the bolt.

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SF552A-C
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15.

Install the new A/C refrigerant line lower support bracket and two new supplied mounting bolts. Hand
tighten the bolts. See Fig. 3.

1. New Mounting Bolts

2. New Support Bracket
Fig. 3, A/C Refrigerant Line Lower Support Bracket Installation

16.

Tighten the A/C refrigerant line lower support bracket mounting bolts and the thermostat housing bolt 15
lbf·ft (20 N·m).

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SF552A-C
Revised Notice
17.

Install the new A/C refrigerant line upper support bracket with supplied mounting bolts. See Fig. 4. Hand
tighten.

1. Upper Support Bracket

2. Clamp Nut

3. Bracket Mounting Bolts

Fig. 4, A/C Refrigerant Line Upper Support Bracket Installation

18.

With the rubber isolators and the bracket in the original location, install the original bolt and nut that secure
the A/C refrigerant line clamp to the new A/C refrigerant line upper bracket. Hand tighten the fasteners.

19.

Install the upper radiator hose at the thermostat housing.

NOTICE
The A/C refrigerant line clamp bolt must be held in place during the torque sequence, or damage to the
A/C refrigerant lines may occur.
20.

Tighten the A/C refrigerant line upper support bracket mounting bolts and line clamp nut to 15 lbf·ft (20
N·m).

21.

Fill the cooling system. Refer to GHG17 DD5 Workshop (DDC-SVC-MAN-0194), 6.3 Cooling System Fill
Procedure.

22.

If removed, install the bumper. Refer to the New Cascadia Workshop Manual, Section 31.02.

CAUTION
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic switch
studs are at battery voltage.
23.

For SF552B and SF552C, go to "A/C Dryer Mounting Replacement" below.
For SF552A, connect the batteries and close the hood.

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Daimler Trucks
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SF552A-C
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24.

For SF552A, no further work is needed. Clean a spot on the base label (Form WAR259). Write the campaign number, SF552, on a blank gray completion sticker (Form WAR261) to indicate the work has been
completed and attach it to the base label.

A/C Dryer Mounting Replacement—SF552B and SF552C
REVISIONS: The Parts Table and kit 25-SF552-001 have been corrected with Belt Tensioner Replacement part
A9362002670. For questions concerning the SF552B certification label, the DDC contact has changed to
Dan Moote at (313) 592-5690.
Vehicles in SF552B require a software update and certification label. Immediately contact your Detroit Diesel,
District Service Manager (DSM) or National Account Manager (NAM), to coordinate receipt of the certification
label. For questions concerning the certification label, call Dan Moote at (313) 592-5690.
1.

Remove the mounting nuts from the A/C dryer and position the A/C dryer aside. Retain the nuts for installation. See Fig. 5.

1. A/C Dryer Mounting Nuts

2. Bracket

3. Bracket Mounting Bolts

Fig. 5, Old A/C Dryer Mounting

2.

Remove the mounting bolts that secure the A/C dryer mounting bracket to the engine cooling package.
Discard the A/C dryer mounting bracket and mounting bolts.

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SF552A-C
Revised Notice

3.

Place the A/C dryer mounting studs through the new A/C dryer bracket while aligning the new A/C dryer
bracket to the frame. See Fig. 6.

1. Bracket Mounting Nuts
2. Bracket Mounting Bolts

3. A/C Dryer Mounting Nuts
4. Bracket
Fig. 6, New A/C Dryer Mounting

4.

Install the new A/C dryer support bracket with the supplied bolts and nuts. Hand tighten the fasteners.

5.

With the new A/C dryer bracket installed verify it is mounted parallel with the frame rails, then tighten the
fasteners 30 lbf·ft (40 N·m).

6.

Install the A/C dryer mounting nuts. Tighten the nuts 15 lbf·ft (20 N·m).

7.

Go to "Starter Cable Replacement" following.

Starter Cable Replacement—SF552B and SF552C
Vehicles in SF552B require a software update and certification label. Immediately contact your Detroit Diesel,
District Service Manager (DSM) or National Account Manager (NAM), to coordinate receipt of the certification
label. For questions concerning the certification label, call Dan Moote at (313) 592-5690.

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SF552A-C
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1.

With the batteries disconnected, remove the cable clamp from the forwardmost starter-cable bracket. See
Fig. 7.

1. Bracket Mounting Screw
2. Washer

3. Starter Cable Bracket
4. Cable Clamp

5. Nut
6. Starter Cables

Fig. 7, Starter Cable Bracket Installation

2.

Remove the forwardmost starter-cable bracket from the engine block.

3.
4.

Install the new bracket.
Install the cable clamp on the bracket.

CAUTION
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic switch
studs are at battery voltage.
5.

For SF552B, go to "Alternator Belt and Belt Tensioner Replacement" following.
For SF552C, connect the batteries and close the hood.

6.

For SF552C, nothing further needs to be done. Clean a spot on the base label (Form WAR259). Write the
campaign number, SF552, on a blank gray completion sticker (Form WAR261) to indicate the work has
been completed and attach it to the base label.

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Daimler Trucks
North America LLC

Field Service Campaign

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SF552A-C
Revised Notice

Alternator Belt and Belt Tensioner Replacement—SF552B
REVISIONS: The Parts Table and kit 25-SF552-001 have been corrected with Belt Tensioner Replacement part
A9362002670. For questions concerning the SF552B certification label, the DDC contact has changed to
Dan Moote at (313) 592-5690.
Vehicles in SF552B require a software update and certification label. Immediately contact your Detroit Diesel,
District Service Manager (DSM) or National Account Manager (NAM), to coordinate receipt of the certification
label. For questions concerning the certification label, call Dan Moote at (313) 592-5690.

WARNING
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic switch
studs are at battery voltage.
To avoid injury to hands and fingers from the spring-loaded auto belt tensioner violently snapping back,
do not cut the belt to remove it.
1.

Disconnect the batteries, if not already disconnected.

2.

Open the hood.

3.

If needed, remove the bumper end(s).

4.

Using the guide pulley mounting bolt on the fan drive belt tensioner, rotate the assembly counterclockwise
and hold to relieve tension. See Fig. 8.

1. Accessory Drive Belt Tensioner
2. Accessory Drive Belt

3. Fan Drive Belt Tensioner
4. Fan Drive Belt
Fig. 8, Alternator Belts and Belt Tensioners

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SF552A-C
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5.

While tension is relieved, insert a 1/4-inch (7 mm) pin into the locking hole of the fan drive belt tensioner
housing.

6.

Slide the fan drive belt off.

7.

Using the guide pulley mounting bolt on the accessory drive belt tensioner, rotate the assembly clockwise
and hold to relieve tension.

8.

While tension is relieved, insert a 1/4-inch (7 mm) pin into the locking hole of the accessory drive belt tensioner housing.

9.

Slide the accessory drive belt off and discard it.

10.

Remove the mounting bolt from the accessory drive belt tensioner, then remove the belt tensioner and discard it.

11.

Install the new accessory drive belt tensioner. Tighten the mounting bolt 37 lbf·ft (50 N·m).

12.

Slide the new accessory drive belt into place and release tension on the accessory drive belt tensioner.

13.

Use the guide pulley mounting bolt on the accessory drive belt tensioner to rotate the assembly clockwise
and hold to relieve tension. Remove the locking pin.

14.

Slide the fan drive belt into place and release tension on the fan drive belt tensioner.

15.

Use the guide pulley mounting bolt on the fan drive belt tensioner to rotate the assembly clockwise and
hold to relieve tension. Remove the locking pin.

16.

If needed, install the bumper end(s).

17.

Connect the batteries.

18.

Close the hood.

19.

Go to "Software Update" following.

Software Update—SF552B
Vehicles in SF552B require a software update and certification label. Immediately contact your Detroit Diesel,
District Service Manager (DSM) or National Account Manager (NAM), to coordinate receipt of the certification
label. For questions concerning the certification label, call Dan Moote at (313) 592-5690.
NOTE: You must use DiagnosticLink® Professional 8.06 with Service Pack 2 (or higher) when reprogramming.
1.

Connect DiagnosticLink to the vehicle. Make sure that all the modules (ACM, CPC, and MCM,) are
connected.

NOTE: Before you begin reprogramming, make sure the VIN is correct in all modules (ACM, CPC, and MCM). If
the VIN is not correct in all modules, you will get an error message when attempting to reprogram.
2.

Make sure the VIN is correct in all modules (ACM, CPC, and MCM) by looking at the “Identification”
screen in DiagnosticLink. If the VIN is not correct in all modules, you can correct the VIN under the Actions
drop-down menu in DiagnosticLink by selecting “Check VIN Synchronization.” Select “Start” from this panel
and follow the prompts. You will be prompted to cycle the key until the routine has completed. When synchronization is complete, turn the key back on and continue with the download process.

3.

On the Identification screen, check the current MCM and ACM software and fuel map level. Listed below
are the minimum levels required. See Fig. 9 for an example of the Identification screen for the MCM and
ACM.
• MCM 9.1.2.3 software and fuel map version ZGS 004
• ACM 9.57.1 software and fuel map version ZGS 001

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Daimler Trucks
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SF552A-C
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4.

Is the software level for the MCM and ACM equal to or higher than the software levels listed in step 3?
Both modules must meet the minimum requirements. For the example in Fig. 9, MCM software 9.1.2.2
and ACM software 9.54.0.0 are both less than the minimum levels of 9.1.2.3 and 9.57.1.0, thus programming is required regardless of the fuel map ZGS version.
If Yes, proceed to step 5.
If No, proceed to step 6.

Fig. 9, DiagnosticLink Identification Screen
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SF552A-C
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5.

Is the fuel map ZGS version level for the MCM and ACM equal to or higher than the levels listed in
step 3? The MCM and ACM fuel map ZGS version levels must meet the minimum requirements. For example in Fig. 10, the MCM software level meets the minimum required of 9.1.2.3, but the fuel map ZGS
version level 003 is less than the minimum level of 004, and thus would require programming.
If Yes, proceed to step 11.
If No, proceed to step 6.

Fig. 10, DiagnosticLink Identification Screen (with less than the minimum required ZGS version level)
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6.

Select the “Program Device” option on the left side of the DiagnosticLink screen.

7.

Select the “Add” button in the upper right corner of the DiagnosticLink screen and enter the engine serial
number. Then click the “Connect to Server” button in the bottom right corner of the DiagnosticLink screen.
See Fig. 11.

Fig. 11, Adding Engine Serial Number And Connecting To Server

8.

Program the MCM, ACM, or both if necessary.

9.

When programming is complete, click the “Finish” button and perform the following to allow the modules to
synchronize with each other:
9.1

Turn the vehicle ignition OFF, disconnect the USB Link at either the computer port or vehicle diagnostic port, and wait one minute.

9.2

Turn the vehicle ignition ON and wait one minute.

9.3

Turn the vehicle ignition OFF and wait one minute.

9.4

Turn the vehicle ignition ON and wait one minute.

9.5

Reconnect the USB Link, reconnect DiagnosticLink to the MCM and ACM, and confirm the proper
software and fuel map levels.

10.

Ask the customer if they would like Auto Elevate activated. Auto Elevate can prevent Aftertreatment System (ATS) issues. Refer to Detroit Technical Service Letter 16 TS-18 for full details on Auto Elevate.

11.

Install the new engine certification label.

12.

Clean a spot on the base label (Form WAR259). Write the campaign number, SF552, on a blank gray
completion sticker (Form WAR261) to indicate the work has been completed and attach it to the base label.

Page 17