1/28/2020

B6.7 CM2350 B121B Fuel Heater Campaign

Warranty Field Campaign
Campaign Number: c2128

Revision:

B6.7 CM2350 B121B Fuel Heater Campaign

Released Date: 24-Jan2020
Expiration Date (U.S. and
Canada): 24-Jul-2021
Expiration Date
(International): 24-Jul-2021

Attention
Worldwide distr./ branches and Div./Reg Offices
U.S. / Canadian Distr./Branches and Div. Offices
U.S. / Canadian Dealers (Automotive)
If additional information is required, please contact your Cummins Warranty Operations
Group Leader.

Description
Certain B6.7 CM2350 B121B engines were shipped without a fuel heater; a plug was installed in
place of a fuel heater. This Campaign authorizes certified repair locations to install a fuel heater in
place of the plug, change the fuel heater wiring harness polarity by switching wiring terminal
locations within the fuel heater connector, and to replace or install a new fuse in the fuel heater
circuit.

Action
In order to qualify for repair under this field action, an engine:
1. will be covered Regardless of coverage status, and
2. must show as OPEN on QuickServe® Online for this field action.

Note : The ESN list is attached for reference.
After verifying that the engine meets the above requirements, perform the following actions:
1. Complete all of the repair instructions included within Attachment B.
2. Verify the current status of the fuel heater supply circuit wire locations within the fuel heater
connector. If there is no white dot on the fuel heater connector, and/or the polarity has NOT
been reversed, please refer to Attachment B for further instruction on the verification and/or
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3.

4.

5.

6.

B6.7 CM2350 B121B Fuel Heater Campaign

correction of the fuel heater supply circuit. If there is a white dot and the polarity has already
been reversed, continue with the remaining repair instructions.
Remove the fuel heater plug currently installed in the fuel filter module. Install the new fuel
heater included within the fuel heater kit necessary for the appropriate application the engine
is installed. Please refer to Attachment B for further instruction on fuel heater or plug removal
and fuel heater installation.
Confirm the correct wiring harness polarity. Please refer to Attachment B for further instruction
on verification of the correct terminal locations within the connector that indicate a correctly
wired fuel heater circuit.
Install the new fuse included in the fuel heater kit necessary for the appropriate application the
engine is installed. Please refer to Attachment B for further instruction on fuse location and
installation within the appropriate application.
Connect the engine fuel heater wiring harness connector to the fuel heater and mark the
connector to confirm that the fix has been completed. Place the sticker included within the kit
into the fuse box and place the insert included within the kit into the owner's manual. Please
refer to Attachment B for further instructions on how to make the proper indication on the
connector that the fix has been completed and where to place the appropriate sticker and
manual insert.

Material Disposition
Materials removed as a result of this field action must be scrapped.

Reimbursements
Parts
Note : Refer to Attachment B for application specific information on the proper fuel
heater kit part numbers to order.
The following parts are covered under this field action:
Part Number

Quantity

Description

563336200

1

KIT, FUEL HEATER
(OPTIONAL)

563336300

1

KIT, FUEL HEATER
(OPTIONAL)

Note : SRTs to gain access that are required to complete the repair, that are sufficiently
explained in the claim narrative, may also be claimed on this action.
Labor Using Applicable Access Code and Time
SRT Code
00-90X

Description

Time (hrs)

Administrative time

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B6.7 CM2350 B121B Fuel Heater Campaign

SRT Code

Description

19-0PB

Wire Connector - Replace,
Each Connector (EPA 2017)

99-902

FUSE INSTALLATION, FUEL
HEATER REMOVE AND
INSTALL, AND MANUAL
UPDATES (QTY 1 )

Time (hrs)

Travel
Travel is covered under this field action. Towing is covered under this field action.

Other Claimables
Consumables are covered under this field action.

Note : Please consolidate all consumables and claim them as one item in Other
Claimables titled "CAMPAIGN SUPPLIES".

Claim Instructions
For Cummins Dealers, claims for this Field Campaign must be filed via RAPIDSERVE™ Web
(rsw.cummins.com). For information regarding RAPIDSERVE™ Web, please reference the
"Warranty" tab in QuickServe® Online. If there are additional questions, please contact your local
Cummins Distributor.
Claim Codes
Description

Code

Account Code:

65

Pay Code:

Distributor = X

Pay Code:

Dealer = D

Pay Code:

International = I

Failure Code:

WFEHTD

Attachments
Click here to see c2128_esn-list.xlsx

(/service/english/attachments/c2128_esn-list.xlsx)
Click here to
see c2128_fuel_heater_campaign_attachment_b.pdf
(/service/english/attachments/c2128_fuel_heater_campaign_attachment_b.pdf)
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B6.7 CM2350 B121B Fuel Heater Campaign

Engine Family

Fuel System

ISBe4 (6 Cylinder) QSB6.7 ISB ISDe, ISD4.5,
ISD6.7 ISBe, ISB4.5, ISB6.7
Design Application
Automotive

Market Application
All

Document History
Date

Details
Document Created; 24-Jan-2020

Last Modified: 24-Jan-2020

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C2128, B6.7 CM2350 B121B Fuel Heater Campaign – Attachment B

Verification/Confirmation







Verify engine has Cummins supplied priming pump fuel filter head installed.
o Option FS90301
o Option FS90453
Locate Stage 1 fuel filter head on engine. The engine fuel heater or plug and harness connection is
located on the top right side of the fuel filter head. The unit may have either a heater or plug installed.
If the unit has a plug, the wiring for the heater may be zip tied in an out of the way location.
Ensure the fuel heater connecter and fuel heater have no white paint marks. See Figure 1 below.
Make sure the OEM harness wires are installed with the white wire on the right (terminal 2) and the red
wire on the left (terminal 1) using the orientation shown in Figure 1 below.
o If the unit has a plug, hold the connector up to the filter head as if it were plugged into the heater
and verify the wire installation.

1

2

3

Fix not complete

Fix complete
Figure 1

1. No white paint mark on the connector
2. White wire is on the right (terminal 2)
3. Red wire is on the left (terminal 1)

Resolution
Install parts in Kit and swap the fuel heater connector wires if required. See Service Instructions below.

Service Instructions
Use correct Kit by referring to Attachment A.

Install Fuel Heater provided in Kit
1. Unlock connector by moving red tab to the right and disconnect from engine fuel heater if plug has not

already been installed.
2. Remove and discard two allen screws securing engine fuel heater, or plug, to the fuel filter head with a
5mm hex driver. See Figure 2 below.
3. Pull the engine fuel heater, or plug, straight out of the fuel filter head and discard. Capture any fuel that
may leak from the fuel filter, or plug. See Figure 3 below.

Figure 2
Figure 3
4. Clean face of engine fuel heater port with a lint free cloth and inspect for any sharp edges and/or
contaminants. Clean if needed.
5. Lubricate the O‐ring on the new fuel heater supplied in kit with clean diesel fuel and carefully install into
the engine fuel heater port, making sure to properly align before installing.
6. Use the two allen screws supplied to secure the fuel heater to the fuel filter head and tighten to 11 N‐m
[6.6 ft‐lb].

Swap the heater wiring polarity if required.
1. Disconnect vehicle battery.
2. Pull plastic guide piece from connector with needle nose plyers. See Figure 4 below.

Figure 4
3. Use PN4918921 Terminal Removal Tool to remove wires from connector. See Figure 5 below.

Figure 5

4. Swap the wire positions so that the white wire is in the number 1 terminal and the red wire is in the

number 2 terminal. Please use orientation shown in the figures below.

Figure 6: Number 1 Terminal Marking

5.
6.
7.
8.
9.

Figure 7: Number 2 Terminal Marking

Figure 8, Not OK
Figure 9, OK
Insert the wire back into the back of the connector in the same orientation that it was removed
When correctly installed, you will hear the wire click and lock into the connector
Lightly tug on the wires to ensure they are secure
Ensure connector seal on the back of the connector is in place after wires are re‐installed
Once both wires are connected back in, re‐install plastic guide piece

Install Fuse
Application

Corresponding Kit Part Number

Configuration

Navistar® CE Bus and 1300

See Attachment A for needed kit

Configuration 1

Navistar® MV, HV and TC
Commercial Bus

See Attachment A for needed kit

Configuration 2

Table 1

Configuration 1. Navistar® CE Bus and 1300 Fuse Instructions
1. Disconnect vehicle battery.
2. Locate fuel heater fuse location on dash panel. See Figure 10 below.
3. Remove fuse cap and install 30amp Maxi Fuse provided in Kit Part Number 5633362. If a fuse is
already installed in the cavity replace it with the fuse provided in the kit.
4. Reinstall fuse cap.

Figure 10

Configuration 2. Navistar® MV / HV / TC Commercial Bus Fuse and some DuraStar (4300) / WorkStar
(7300) HC Bus Fuse Instructions
1. Disconnect vehicle battery
2. Remove cover of fuse box, located on passenger side dashboard. See Figure 11 below.

3. If it is a DuraStar/WorkStar/HC Bus, check to see if a 5 amp fuse is present in cavity F4-D. See
Figure 14 below.
a) If there is a 5 amp fuse in cavity F4-D, leave the fuse and DO NOT replace with the 20
amp fuse provided in the kit.
b) If there is not a fuse in cavity F4-D, source Navistar Part Number 3534208C1 and install
the 5 amp fuse in cavity F4-D.
c) If applicable, discard 20 amp fuse that came with the kit. (For DuraStar/WorkStar/HC Bus
only)
4. If the unit is a MV/HV or TC Commercial bus, install 20-amp fuse supplied in Kit Part Number
5633363 at the B8-J cavity 17-21.
5. For all units of configuration 2, based on kit purchased, install 30-amp fuse located at 2C cavity. If
a fuse is already installed at the 2C cavity replace it with the fuse provided in the kit. See Figure
12 below.

Figure 11, Location of 20A Fuse on Navistar MV/HV/TC

Figure 12, Location of 40A Fuse on Navistar MV/HV/TC and some DuraStar / WorkStar / HC Commercial Bus

Reconnect engine fuel heater and mark that the fix has been completed
1. After the fuse or fuses have been installed, connect the fuel heater OEM harness branch to the engine

fuel heater.
2. Zip tie the excess harness to the heater as seen below in figure 15. Make sure there is no tension on the

wires going into the connector.

Figure 15
3. Mark that the fix has been completed by placing a white paint mark on the connector of the engine fuel
heater. See Figure 16 below.

Figure 16
4. For CE Bus applications please place the fuse sticker provided in the kit in the appropriate spot to update

the unit for future service
5. For MV/HV applications please place the provided manual sticker into the manual to update the fuse size
for future service.

Service Parts Availability
There are 2 different kits to accommodate the 2‐different fuse types
Service parts are available. See Table below for part numbers.
Part Description
New Part Number
5633362
Kit 1 for Navistar® CE Bus and 1300
Kit 2 for Navistar® MV, HV and TC Commercial Bus, and
some Navistar® DuraStar (4300) / WorkStar (7300) / HC
Commercial Bus

5633363