NHTSA ID Number: 10212539
Manufacturer Communication Number: C2546
TSB/Document Date: 2022-05-31
Summary
This Campaign is being launched to install a new fuel heater on certain B6.7 engines. This commercial action is to enable fuel heating capability on engines where no fuel heater has been installed.
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TSB/Document ID: C2546
Replacement Service Bulletin Number:
MFR Communication Date: 2022-01-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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A CUMMINS
FIELD CAMPAIGN
Please Deliver To: Service Managers and Warranty Decision Makers
FROM: Cummins Global Warranty Administration Communications
Subject: B6.7 Engine Mounted Fuel Heater Commercial Campaign for Bus, School Bus, RV, and Fire Truck
Number: C2546
Expires:
Attention:
Date: 27-Jan-2022
15-Jul-2023 (U.S./Canada)
15-Jul-2023 (International)
U.S. / Canadian Distr./Branches and Div. Offices (Automotive)
If additional information is required, please contact your Cummins Warranty Operations Group Leader.
DESCRIPTION:
This Campaign is being launched to install a new fuel heater on certain B6.7 engines.
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 Install a new Fuel Heater in accordance with the applicable service procedure outlined within Attachment B.
MATERIAL DISPOSITION:
Materials removed as a result of this field action must be scrapped.
REIMBURSEMENTS:
Parts:
NOTE: All parts listed are OPTIONAL. This campaign requires only ONE kit part number to complete the repair. Claim
ONLY the parts needed to complete the repair. Please refer Attachment B detailed service instructions to identify and
order the appropriate kit part number.
The following parts are covered under this field action:
Part Number
571014300
571014400
571014500
572725700
Quantity
1
1
1
1
Description
KIT,HTR (OPTIONAL)
KIT,HTR (OPTIONAL)
KIT,HTR (OPTIONAL)
KIT,HTR (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
Description
00-90F
Administrative time
99-00B
REMOVE AND INSTALL - FUEL HEATER (QTY 1)
Time
Travel:
Travel is covered under this field action. Towing is not covered under this field action.
Other Claimables:
Consumables are not covered under this field action.
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.
Account Code: .............................................................................................................................................................. 65
Pay Code: .......................................................................................................................... North America Distributor = X
Pay Code: ................................................................................................................................ North America Dealer = D
Pay Code: ............................................................................................................................... International Distributor = I
Pay Code: ................................................................................................................................... International Dealer = R
Failure Code: ..................................................................................................................................................... WFEHTG
Attachments
c2546_esn-list.xlsxc2546_fuel_heater_service_instructions_attachment-b.pdf
Fuel Heater Campaign
Date: 12/8/2021
The purpose of this campaign is to replace the current fuel heater with cut connector or fuel heater plug
in the Stage 1 Fuel Filter head with a new fuel heater.
Verification
Locate the Stage 1 fuel filter head on engine. The engine fuel heater is located on the top right side of
the fuel filter head. Based on previous field action (C2127, C2128, C2302, TRP2129 and/or ATC2278)
the fuel heater connector may have been cut as in Figure 1 or the original fuel heater may have been
removed and a plug installed in its place as shown in Figure 2. The instructions in this document will
apply for either condition. If a working fuel heater is present refer to C2507 instead.
Figure 1: Fuel Heater Connector Cut
Figure 2: Fuel Filter Module with Plug
Parts Needed
Table 1: Associated Part Numbers
Part Description
Kit with heater and cap screws but no fuses
Kit with heater, cap screws, fuse, and sticker - Bus Application
Kit with heater, cap screws, fuses, and sticker - Durastar/Workstar Application
Kit with Heater, cap screws, fuses, and sticker - MV/HV Application
Cummins Part Number
5727257
5710143
5710144
5710145
Service Instructions
Follow the steps below to install the new heater. If a fuse is required, please reference Table 1 above to
determine the appropriate scenario for fuse installation instructions depending on vehicle type and
refer to the correct section below.
Fuel Heater Campaign
Date: 12/8/2021
Heater Installation
1. Remove and discard two allen screws securing engine fuel heater with cut connector or plug to
the fuel filter head with a 5mm hex drive.
2. Pull the engine fuel heater with cut connector or plug straight out of the fuel filter head. Capture
any fuel that may leak from the fuel filter. See Figure 3 below.
Figure 3: Removal of Heating Element
3. Clean face of engine fuel heater port with a lint free cloth and inspect for any sharp edges
and/or contaminants (location 6) as indcated in Figure 4. Clean if needed.
4. Lubricate the o-ring on the fuel heater (location 7) supplied in the kit with clean diesel fuel and
carefully install into the engine fuel heater port, making sure to properly align before installing.
5. Use the two allen screws supplied to secure the heater to the fuel filter head and tighten to
11N-m [6.6 ft-lb].
Fuel Heater Campaign
Date: 12/8/2021
Figure 4: Installation of New Heating Element
Fuse Installation
Navistar® CE Bus and 1300 FBC Fuse Installation
Kit contents: Stickheater, cap screws, 30 A fuse (green), replacement fuse sitcker
Disconnect the vehicle battery
1. Locate fuel heater fuse on dash panel. See Figure 5 below.
2. Remove fuse cap and install 30 amp Maxi Fuse provided in Kit Part Number 5710143 into the F4
cavity. If a fuse is already installed in the cavity replace it with the fuse provided in the kit.
3. Reinstall fuse cap.
4. Please place the fuse sticker provided in the kit in the appropriate spot to update the unit for
future service, reference Figure 6.
Fuel Heater Campaign
Date: 12/8/2021
Figure 5: Location of Fuse on Dash Panel
Figure 6: CE Bus 30A fuse sticker location with new sticker placed
Location of Fuse on Navistar® DuraStar (4300) / WorkStar (7300) / HC Commercial Bus Fuse
Installation
Kit contents: Stick heater, cap screws, 30 A fuse (pink), 20 A fuse (yellow), updated service manual fuse
sticker
Disconnect vehicle battery.
1. Remove Power Distribution Module (PDM) cover, located under the hood on the driver side.
2. Install 30 amp fuse provided in kit part number 5710144 in cavity 2C. If a fuse is already installed
at the 2C cavity replace it with the fuse provided in the kit. See Figure 7 below.
Fuel Heater Campaign
Date: 12/8/2021
Figure 7: Location of Fuse on Navistar Durastar (4300) / WorkStar (7300) / HC Commercial Bus
3. Remove cover of fuse box, located on passenger side dashboard
4. Check to see if fuse in the cavity located at F4-D is present. See Figure 8 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.
5. Please place the sticker provided in the kit into the service manual to update the fuse size for
future service.
Figure 8: Location of Fuse on Navistar DuraStar (4300) / WorkStar (7300) / HC Commercial Bus
Fuel Heater Campaign
Date: 12/8/2021
Navistar® MV and HV Truck / TC Commercial Bus Fuse
Kit contents: Stick heater, cap screws, 30 A fuse (green), 20 A fuse (yellow), updated service manual fuse
sticker
Disconnect vehicle battery
1. Remove cover of fuse box, located on passenger side dashboard. See Figure 9 below.
2. Install 20 amp fuse supplied in Kit Part Number 5710145 at the B8-J cavity.
3. 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 10 below.
4. Please place the sticker provided in the kit into the service manual to update the fuse size for
future service.
Figure 9: Location of 20A Fuse on Navistar MV/HV/TC
Fuel Heater Campaign
Date: 12/8/2021
Figure 10: Location of 30A Fuse on Navistar MV/HV/TC
Reconnect engine fuel heater to the OEM harness
1. Please note that because this fuel heater does not have a thermostat there is no polarity
requirement of the harness wires. As a result, there is no need for wire color alignment at the
connector between the fuel heater harness and vehicle side wiring harness.
2. After the fuse or fuses have been installed connect the fuel heater OEM harness branch to the
engine fuel heater as shown in Figure 11. Note: Discard any electrical plug in the female end of the
wiring harness that may have been installed during a previous field action (C2302). Any zip ties
installed in previous field action (C2302) securing the fuel heater harness to engine wiring harness
can also be discarded as needed to result in the harness routing shown in the Figures 11 and 12
below.
3. Secure the excess fuel heater jumper harness to the vehicle harness with a zip tie as shown below in
Figure 12. Make sure there is no tension on the wires going into the Fuel Heater connector. Ensure
Fuel Heater Campaign
Date: 12/8/2021
a clearance of at least 20 mm (3/4 in) to the low pressure fuel line. The harness shall not be
secured to the fuel line.
Figure 11: Fuel Heater Harness Connection
Figure 12: Fuel Heater Harness Routing and Zip Tie Location
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