IK0500061 Service Bulletin/Repair Instructions

IK0500061 - CE Bus Steering Returnability Diagnostics
Page 1 of 5
Countries:
CANADA, UNITED STATES,

MEXICO
Document ID: IK0500061
Availability:
ISIS, Bus ISIS, FleetISIS, IsSIR
Revision:
3
Major System:
STEERING SYSTEM
Created:
5/23/2019
English
Last

Modified:
9/13/2019
Author:
David

Horner
Current

Language:
Other Languages: NONE

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Title : CE Bus Steering Returnability Diagnostics

Applies To : CE Bus w/ Tilt Columns, ESP, and Steering Switch Controls
CHANGE LOG

Please refer to the change log text box below for recent changes to this article:

09/13/2019 - Updated steering wheel part number

09/05/2019 - Added repair instructions and part numbers, updated author for feedback

08/19/2019 - Added production build date break

05/30/2019 - Initial Article Release



DESCRIPTION

This document will guide the user through diagnosing steering wheels not returning to center without assistance on IC CE Buses.

This document only applies to CE buses built during 1/29/2018 thru 6/11/2019 with the following feature codes:

• Tilt Column: 0005708 (Column part number 4095815C91 (Bendix) or 4110141C91 (Wabco))

• ABS with ESP: 0004AZS (Bendix air system) or 0004JNX (Wabco hyd. system)

• Steering wheel Switch: 0047DNK or 0047DNU or 0047DWC
SYMPTOM(s)

Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):

There are no fault codes associated with this failure mode.

Customer Observations or Concerns:

The customer may notice that the vehicle may have reduced return-ability without some assistance or the steering wheel may not

fully return to "on center position" after a turn without some assistance.

Note: Return-ability definition - The feel and predictability of the steering system's center return. Steering should return towards

"on center" smoothly and quickly without any binding.
SPECIAL TOOL(s) / SOFTWARE

Tool Description
Tool Number
Steering Wheel Puller 05-252-01
Comments
Instructions

TL2900050
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IK0500061 - CE Bus Steering Returnability Diagnostics
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SERVICE PARTS INFORMATION

Kit Description
Part Number
Quantity

Required
Notes
Modified Bare Steering Wheel Kit
2521330C91
1
5mm of material removed from the

hub. No cover, wiring or switches
DIAGNOSTIC STEP(s)
Always wear safe eye protection when performing vehicle maintenance. Failure to do so

may result in personal injury and / or death.
Park vehicle on a hard, flat surface, turn the engine off, set the parking brake, and block

the wheels to prevent the vehicle from moving in either direction. Failure to do so may

result in property damage, personal injury, and / or death.
The return-ability procedure should be performed on a flat paved surface where greater

than a full lock turn can be performed safely.

Possible Causes of low return-ability:

•

•

•

•

•

•

•
Low Steering Axle Caster

Binding Kingpins

Binding Draglink Ends

Binding Tie Rod Ends

Binding Steering Gear

Binding Steering Shaft U­joints/Slip Joint

Binding Steering Column
Step Action

DIAGNOSTIC:
Decision

Yes. No additional actions are needed
Determine the vehicles returnability of the steering.

This procedure should be performed on a flat paved surface where greater than

a full lock turn can be performed safely.
1
From a full stop, turn the wheel to full lock. Take hands off the steering wheel

and start to accelerate gradually, the vehicle should be making a circle. Increase

the vehicle speed to no more than 20mph without hands on the wheel. Repeat

the test for both left and right turns.

Does the steering return in both directions to within 180 degrees or 1/2 turn

of straight before the bus completes two full circles with smooth and

predictable steering movement?
No. Proceed to step 2.
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IK0500061 - CE Bus Steering Returnability Diagnostics
Step Action

DIAGNOSTIC:
Page 3 of 5
Decision

Yes. Proceed to the repair solution

below.
Inspect for clockspring to steering wheel interference.

Remove the steering wheel and remove the clockspring.
2
Without reinstalling the clockspring, install the steering wheel, torque the steering

wheel nut to 55-60ft-lbs.

No. Reinstall the clockspring. Check

alignment, then diagnose

With the clockspring removed repeat the return-ability test in step 1.

potential binding in the steering gear,

kingpins, draglink/tie rod ends, or

Does the steering return in both directions to within 180 degrees or 1/2 turn

steering shaft.

of straight before the bus completes two full circles with smooth and

predictable steering movement?
Figure 1: Steering column cut-a-way view
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IK0500061 - CE Bus Steering Returnability Diagnostics
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Figure 2: Steering column and steering wheel with covers removed for visual
REPAIR STEP(s)
Park vehicle on a hard, flat surface, turn the engine off, set the parking brake, and block

the wheels to prevent the vehicle from moving in either direction. Failure to do so may

result in property damage, personal injury, and / or death.
Always wear safe eye protection when performing vehicle maintenance. Failure to do so

may result in 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, potentially resulting in property damage, personal injury, and /

or death.
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IK0500061 - CE Bus Steering Returnability Diagnostics
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NOTE: If 2521330C91 is not available in the PDCs please open a Tech Service Case file for a temporay repair solution.

Step 1. Remove original steering wheel, it is to be replaced with part number 2521330C91.

Step 2. Transfer over steering wheel cover, switches, wiring harness, and horn cover retention springs to the new wheel and

reinstall the clockspring that was previously removed.

Step 3. Install the new steering wheel and torque the to 55-60 fl-lbs.

Step 4. Validate repair by repeating returnability test in diagnostic step 1.
WARRANTY INFORMATION

Warranty Claim Coding:

Refer to the Warranty Coding Manual for Group and Noun Codes.
Standard Repair Time(s):

Refer to the SRT Manual for Repair Times
OTHER RESOURCES

Master Service Information Site

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Copyright © 2019 Navistar, Inc.
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