SERVICE PROCEDURE
18501
APRIL, 2018
SUBJECT:

SAFETY RECALL
Fuel system relay on certain CE school bus
models built 19 February 2015 through 16 January
2018 with feature code 12PAA or 12PAB – PSI 8.8L
Liquid Propane Gas (LPG) engine

DEFECT DESCRIPTION
The fuel system relay for the propane booster pump and scavenge pump may
experience intermittent continuity, causing the fuel pump to stop running and
resulting in unintended stalling, no start, or hard start conditions. In bus
applications, unintended stalling conditions may result in evacuation concerns
when students must be transferred to another bus near the roadway.

MODELS INVOLVED
This safety recall involves certain CE school bus models built 19 February 2015
through 16 January 2018 with feature code 12PAA or 12PAB – PSI 8.8L Liquid
Propane Gas (LPG) engine.

ELIGIBILITY
This procedure applies ONLY to vehicles marked in the International® Service
Portal℠ with Safety Recall 18501. Also complete any other open campaigns
listed on the Service Portal at this time.

PARTS INFORMATION
Part Number
1688314C1

Part Description
Relay

Quantity
1

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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SERVICE PROCEDURE
WARNING! To prevent property damage, personal injury, and / or death,
park vehicle on hard flat surface, turn the engine off, set the parking brake
and install wheel chocks to prevent the vehicle from moving in either
direction.
WARNING! To prevent property damage, personal injury, and / or death, if
the vehicle must be raised, do not work under the vehicle supported only
by jacks. Jacks can slip or fall over.
WARNING! To prevent personal injury and / or death, always wear safe eye
protection when performing vehicle maintenance.
WARNING! To prevent property damage, personal injury, and /or death,
allow engine / vehicle components to cool before servicing.
WARNING! To prevent property damage, personal injury, and / or death,
keep flames or sparks away from vehicle and do not smoke while servicing
the vehicle’s batteries. Batteries expel explosive gases.
WARNING! To prevent property damage, personal injury, and / or death,
remove the ground cable from the negative terminal of the battery box
before disconnecting any electrical components. Always connect the
ground cable last.

1.

Park vehicle on flat surface.

2.

Shift transmission to Park or Neutral and set parking brake.

3.

Turn vehicle ignition to key OFF position.

4.

Install wheel chocks.

5.

Unlatch and open main battery box.

6.

Disconnect ground cable from negative terminal of main vehicle battery.

7.

If necessary, raise rear of vehicle and support on suitable jack stands.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 1. Propane Delivery Module Access Plate
1. Access plate
2. Fastener (5) (2 not pictured)

8.

Locate access plate (Figure 1, Item 1) covering Liquid Propane Delivery
Module (LPDM) on front of driver-side fuel tank.

9.

Remove five fasteners (Figure 1, Item 2) securing access plate. Set
access plate and fasteners aside for reuse.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 2. 1/4 Turn Fuel Safety Shutoff Valve
10. Grab the 1/4 turn fuel safety shutoff valve firmly, and pull down a 1/4
turn (90°) until the tab on the lever contacts the dowel on the tank
(Figure 2).

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 3. Relay Fastener
1. Fuel tank
2. Fastener
3. Relay

11. Remove fastener (Figure 3, Item 2) that holds the relay (Figure 3, Item
3) on fuel tank (Figure 3, Item 1). Save fastener for reuse.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 4. Relay Electrical Connection
1. Relay
2. Electrical harness connector

12. Disconnect old relay (Figure 4, Item 1) from electrical harness connector
(Figure 4, Item 2). Discard relay.
13. Connect new relay (Figure 4, Item 1) to electrical harness connector
(Figure 4, Item 2).

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 5. Incorrect Connector Seal Insertion
1. Connector seal
2. Relay
3. Electrical harness connector

14. Verify that the connector seal is securely in relay as shown in Figure 4
rather than sticking out as shown in Figure 5, Item 1.

Figure 6. Relay In Correct Position
1. Fastener
2. Relay

15. Position relay (Figure 6, Item 2) in correct location, install fastener
(Figure 6, Item 1), and torque to 80 lb-in (9 N•m).
VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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16. Reopen the 1/4 turn fuel safety shutoff valve by turning 1/4 turn (90°) to
the right.
17. Position access plate over Liquid Propane Delivery Module (LPDM) on
front of driver-side fuel tank, and install five fasteners. Tighten fasteners
to 116 - 142 lb-in (13 - 16 N•m).
18. If jack stands were installed in step 7, remove jack stands and lower
vehicle.
19. Connect ground cable to negative terminal of main vehicle battery.
Torque to 142 - 177 lb-in (16 - 20 N•m).
20. Close and latch battery box cover.
21. Remove wheel chocks.

END OF SERVICE PROCEDURE

LABOR INFORMATION
Operation Number
A40-18501-1

Description
Replace LPDM relay

Time
0.5 hrs

CAMPAIGN IDENTIFICATION LABEL
Each vehicle corrected in accordance with this
campaign must be marked with a CTS-1075
Campaign Identification Label.
Complete the label and attach on a clean surface
next to the vehicle identification number (VIN) plate.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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ADMINISTRATIVE / DEALER RESPONSIBILITIES
WARRANTY CLAIMS
Warranty claim expense is to be charged to Warranty. Claims are to be
submitted in the normal manner, making reference to Safety Recall 18501.
Section 7 of the Warranty Policy and Procedures Manual contains further
information related to the submission and processing of AFC / Recall claims.
As with all claim submissions, items acquired locally must be submitted in the
“Other Charges” tab. The cost of any bulk items (such as a bag of cable tie
straps, roll of wire, barrel of oil, or tube of silicone) should be prorated for the
cost of the individual pieces / amount used during each repair.

UNITED STATES AND POSSESSIONS
The National Traffic and Motor Vehicle Safety Act, as amended, provides that
each vehicle that is subject to a vehicle recall campaign must be adequately
repaired within a reasonable time after the owner has tendered it for repair. A
failure to adequately repair within 60 days after a tender of a vehicle is prima
facie evidence of failure to repair within a reasonable time. If the condition is not
adequately repaired within 60 days, the owner may be entitled to replacement
with an identical or reasonable equivalent vehicle at no charge, or to a refund of
the purchase price less a reasonable allowance for depreciation.
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
CANADA
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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EXPORT
Export Distributors should proceed immediately to make necessary correction to
units in inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your distributor location.
Export Distributors are to submit warranty claims in the usual manner making
reference to this recall number.
Export Distributors are expected to provide full cooperation and follow-up with
respect to this important subject matter. If you have any questions or need
further assistance, please contact the Regional Service Manager at your regional
office.

NAVISTAR, INC.

VEHICLE RECALL 18501
© 2018 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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