FIELD SERVICE CAMPAIGN
BULLETIN
Subject: Field Service Campaign D19M2 REV1
GHG17 Detroit™ DD5™ Fan Hub Bolt Torque Inspection

Issue Involved
Detroit Diesel Corporation (DDC) has determined that some GHG17 Detroit™
DD5™ engines will need to have the fan hub bolts inspected for correct torque. On
certain engines, the protective clear coat applied to the engine before fan hub
installation may cause the fan hub bolt torque to diminish over time. Decreased fan
hub bolt torque may cause failure of the fan hub and surrounding components such
as the fan and radiator, causing customer dissatisfaction.
Protective tape to mask off the fan hub installation area on the engine prior to clear coat
application became effective with engines manufactured in Germany after February 13,
2018. Any GHG17 Detroit™ DD5™ engine manufactured before this date will need the
fan hub bolts inspected for correct torque and repaired if necessary. Note that some
engines built within this time frame may already have been inspected and/or repaired,
and therefore excluded from this Field Service Campaign.
There are approximately 1,806 engines affected by this Field Service Campaign.

Engines Involved
A list of engines located in your area of responsibility that require this correction is
attached.
The table below gives descriptive information to help identify the affected units:
Model
Series
DD5

Model
Number

Model
Year

Inclusive Engine Mfg.
Date
(From) (To)

Descriptive
Information

D934912

2016
2017
2018

January 2016 to February
13, 2018

All applications

Field Service Campaign Bulletin D19M2
Page 2

Owner Notification
Detroit Diesel will notify owners of equipment incorporating engines identified with
this Field Service Campaign. A copy of the owner letter that will be used by Detroit
Diesel is enclosed with this Field Service Campaign Bulletin.

Distributor / Dealer Campaign Responsibility
Detroit Diesel repair facilities are to service all engines subject to this Field Service
Campaign. Field Service Campaign D19M2 is to be performed at no charge to
owners on all affected engines under the engine warranty or prior to August 28,
2020 under the provisions of this Field Service Campaign.
Please use the appropriate steps, noted below, for indicating that Field Service
Campaign D19M2 has been completed.
Daimler Trucks North America Vehicles


Check the base label (Form WAR259) to see if Field Service Campaign D19M2
has been completed. The base label is usually located on the passenger-side
door about 30 cm (12 inches) below the door latch. If Field Service Campaign
D19M2 has been completed, no further work is needed. If base label is not
located on the passenger-side door, please affix label (Form WAR259) 30 cm
(12 inches) from the door latch.



Upon completion of Field Service Campaign D19M2, clean a spot on the base
label (Form WAR259), write the Field Service Campaign Number (D19M2) on a
blank, black completion sticker (Form WAR261), and attach it to the base label.

Ordering Information
1. If you do not have the appropriate Form or Labels (DDC_WAR 259,
DDC_WAR 260. DDC_WAR 261), they can be ordered from EPI Printers
by emailing your order to [email protected].
2. You can also fax in your order to 269-698-4240 Attn: Corrina Cotton.
3. Contact EPI Printers at 734-464-9000.

Field Service Campaign Bulletin D19M2
Page 3

Parts Information
There are no parts required for this Field Service Campaign unless an undertorqued fan hub bolt is discovered. If the inspection results require fan hub bolt
replacement, or fan hub bolt and fan hub replacement, the required parts for this
repair are shown below in Table 1. Note that DetroitTM expects a very low
percentage of vehicles on the list to require any kind of parts replacement.
Part Number
Quantity
N910105010011
4
A9362000628
1
Table 1 – Parts Information

Description
SCREW (Fan Hub Mounting Bolt) - M10 x 40
FANDRVE BRKT (Fan Hub)

Corrective Procedure
1. Apply the parking brake, turn off the ignition, disconnect vehicle battery power,
chock the wheels, and perform any other applicable safety steps.
2. Remove the fan hub pulley. REFERENCE chapter “Belt Drive” and section
“Removal of the Fan Hub Pulley” in the GHG17 DD5 934912(C) Workshop
Manual (DDC-SVC-MAN-0194).
3. Inspect the four fan hub mounting bolts to see if they are all present. See
Figure 1, and note the fan hub pulley is also pictured. Are all four fan hub
mounting bolts present?
a. If Yes, then proceed to step 4.
b. If No, then proceed to step 5.

See four bolts identified by item #3

Figure 1 – Fan Hub Mounting Bolt Location

See four bolts noted by red arrows

Field Service Campaign Bulletin D19M2
Page 4

4. Re-torque the four fan hub mounting bolts to 50 N·m (37 lb·ft). Proceed to step
15.
5. For any fan hub bolts missing, did they break off and leave a portion of the bolt in
the block? See Figure 2.
a. If Yes (bolt broken off), then proceed to step 6.
b. If No (bolt missing), then proceed to step 13.

Figure 2 – Broken Bolt Example

6. Remove the hood. Refer to Original Equipment Manufacturer (OEM) procedures.
7. Remove the radiator and charge air cooler assembly. Refer to Original
Equipment Manufacturer (OEM) procedures.
8. Remove the fan hub. REFERENCE chapter “Belt Drive” and section “Removal of
the Fan Hub” in the GHG17 DD5 934912(C) Workshop Manual (DDC-SVC-MAN0194).
9. Use an acceptable method of bolt removal such as drilling out and extracting the
broken bolt piece in the block.

Field Service Campaign Bulletin D19M2
Page 5

10. Replace the fan hub with P/N: A9362000628 and the four fan hub mounting
bolts with P/N: N91010501001. REFERENCE chapter “Belt Drive” and section
“Installation of the Fan Hub” in the GHG17 DD5 934912(C) Workshop Manual
(DDC-SVC-MAN-0194).
11. Install the radiator and charge air cooler assembly. Refer to Original Equipment
Manufacturer (OEM) procedures.
12. Install the hood. Refer to Original Equipment Manufacturer (OEM) procedures.
Go to step 14.
13. Replace the four fan hub mounting bolts one at a time with P/N: N91010501001.
REFERENCE chapter “Belt Drive” and section “Installation of the Fan Hub” in the
GHG17 DD5 934912(C) Workshop Manual (DDC-SVC-MAN-0194).
14. Inspect the fan belt and crank pulley for damage from the missing bolt.
15. Torque the fan drive idler pulley (item #4) to 50 N·m (37 lb·ft). See Figure 3.

Figure 3 – Fan Drive Idler Pulley and Fan Drive Belt Tensioner Location

Field Service Campaign Bulletin D19M2
Page 6

16. Torque the fan drive belt tensioner (item #6) mounting bolt to the cylinder block to
50 N·m (37 lb·ft). See Figure 3. You must torque the mounting bolt to the cylinder
block, and not the pulley mounting bolt.
17. Install the fan hub pulley. REFERENCE chapter “Belt Drive” and section
“Installation of the Fan Hub Pulley” in the GHG17 DD5 934912(C) Workshop Manual
(DDC-SVC-MAN-0194).
18. Repairs are complete.

Field Service Campaign Bulletin D19M2
Page 7

Warranty Information
Notice
There are three different labor codes listed below. Use only one of these codes
when filing the claim depending on the repair.
Claim administration time, SRT 939-6010A, for 0.3 hours will automatically be
added.
Claim Type:
Modification:
Cause Code:
Primary Failed Part:

FIELD SERVICE CAMPAIGN
D19M2
A1-CAMPAIGN
N910105010011

Use this operation if all four fan hub mounting bolts are present and were retorqued, along with the fan drive idler pulley #1 and fan drive belt tensioner.
Labor Code:
996-F192A
Labor:
0.8 Hours
Use this operation if any fan hub mounting bolts were missing (not broken off)
and replaced, along with re-torqueing the fan drive idler pulley #1 and fan drive
belt tensioner.
Labor Code:
996-F192B
Labor:
1.0 Hours
Use this operation if any fan hub mounting bolts were broken off, and replaced
along with the fan hub, along with re-torqueing the fan drive idler pulley #1 and
fan drive belt tensioner.
Labor Code:
996-F192C
Labor:
3.1 Hours
Parts Return:

REQUIRED

Please contact the Detroit™ Customer Support Center at 800-445-1980 or email
[email protected] if you have any questions.

DETROIT DIESEL
13400 Outer Drive West

Detroit, Michigan 48239-4001
BULLETIN