NHTSA ID Number: 10115345
Manufacturer Communication Number: IK0400088
TSB/Document Date: 2017-08-16
Summary
Brake Single Hot Wheel End Service Procedure
IK0400088 Brake Single Hot Wheel End Service Procedure
Countries:
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BAHAMAS, BOLIVIA, BELIZE, CANADA, CHILE, TAIWAN,
COLOMBIA, COSTA RICA, DOMINICAN REPUBLIC,
ECUADOR, EL SALVADOR, TRINIDAD AND TOBAGO,
UNITED STATES, URUGUAY, VENEZUELA, ARUBA,
NICARAGUA, PERU, PUERTO RICO, Curaçao, GUAM,
GUATEMALA, GUYANA, HAITI, HONDURAS, JAMAICA,
KOREA, SOUTH KOREA, PANAMA
Document
IK0400088
ID:
Availability: ISIS
Revision:
10
Major
System:
Created:
9/26/2011
English
Last
Modified:
4/12/2016
Author:
James
Santos
Current
Language:
Other
Español,
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Title : Brake Single Hot Wheel End Service Procedure
Applies To : ALL Models
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
8/18/2014 - Updated keywords
8/24/2014- Updated with Step Based Process
8/24/2014- Updated with Supplier Maintenance Document
9/7/2014- Added Warranty noun and SRT times
DESCRIPTION
• Single wheel end brake overheat - procedure to resolve issue.
SYMPTOMS
• Single smoking or over heated wheel end predominantly on drive axles.
SPECIAL TOOLS
Tool Description
Comments
Brake Drum Micrometer
Obtain Locally
RESOLUTION
Step
1
Step
2
Action
Measure BSAP and free stroke to confirm and document over adjusted brakes Adjustment
Worksheet
Decision
Yes: Proceed to step 2
Are the brakes over adjusted?
No: Determine if issue is with
drive train or rolling wheel end
i.e. Bearing, Axle, wheel hub,
wheel seal.
Action
Is there any visible damage to the Brake Drum, Linings or Slack Adjuster?
Decision
Yes: Proceed to step 3
No: Proceed to Step 4
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IK0400088 Brake Single Hot Wheel End Service Procedure
Step
3
Action
Remove components and inspect.
Is there any progressive damage present i.e. cracked or out of round drums, chunked or
cracked linings, torn or physical damage to actuator and boot?
Note: minor bluing of the drum surface is acceptable, if drum is within 0.010 out of round
limit.
Page 2 of 3
Decision
Yes: Replace damaged parts
and Proceed to step 4
No: If there are no damaged
parts Proceed to Step 4
Note: Linings are reusable if there is no damage present.
Note: Slack adjuster is reusable if it passes supplier inspection in
suppliers maintenance document and no damage found.
Step
4
Action
Perform Reset Initial brake adjustment in section A of this article
Decision
Yes: Proceed to step 5
Is free stroke within 0.5 and 0.625 inches ?
No: Repeat Step 4
Step
5
Action
Check for proper function of S-Cam and lubrication of Tube in Section B of this article.
Do Brakes release freely ?
Decision
Yes: Release vehicle to
customer
No: Proceed to Step 6
Step
6
Action
Preform repair procedures as stated in Section B of this article and following suppliers
maintenance document.
Decision
Yes: Release vehicle to
customer
Do brakes release freely after repair?
No: Open case file for Chassis
Technical Support
Section A
Reset initial brake adjustment with the following procedure.
• With the wheels chocked and park brake released, air up the tractor until the system purges and air system is full
• Measure the distance from the centerline of the clevis pinto the face of the brake chamber can. (Should be 2.25 inches) Record the dimension.
• with a bar pull the chamber pushrod until it stops and measure the distance again from the centerline of the clevis pin to the face of the brake
chamber can. Record the dimension.
• Subtract the first measurement from the second. It should be 0.5 to 0.625 inches.
• If not in that range, remove the clevis pins connecting the slack to the brake chamber clevis and adjust the slack to the brake chamber centerline
per the suppliers maintenance document.After properly adjusting the slack to the brake chamber clevis pin hole centerline, at 2.25 inches,
reinstall the clevis pins and clips.
• After the pins are reinstalled, adjust the brake shoe to drum clearance with the suppliers maintenance document. (Tighten till drum won’t turn,
then back off adjuster a 1/2 turn, check for free rotation).
Section B
Check for proper lubrication of S-Cam tube.
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IK0400088 Brake Single Hot Wheel End Service Procedure
•
•
•
•
•
Page 3 of 3
Have an assistant apply and release the service brake. Check that brake releases completely
Lubricate the S-Cam tube until grease is noted to be flowing out around the entire circumference of the chamber end of the S-Cam tube.
If the brake does not release completely or is "grabby" repair of the S-Cam and bushing is required.
Proper repair would consist of replacement of the S-Cam bushing and buffing any rust off of the S-Cam with emery cloth. The S-Cam is reusable
if not badly pitted.
Reassemble the S-Cam assembly per the suppliers maintenance document.
STANDARD REPAIR TIMES
Description
SRT Link
Hours
Brake Adjustment Reset Single Wheel
A04T1
0.3
Front Axle ASA replacement
A04-242
0.4
Rear Axle ASA replacement
A04240
0.5
Front Drum replacement outboard mounted single wheel
A04-110
0.6
Front Drum replacement outboard mounted both wheels
A04-111
0.8
Rear Drum replacement outboard mounted wheels single wheel A04-120
0.7
Rear Drum replacement outboard mounted wheels one axle
A04-121
1.0
Rear Drum replacement outboard mounted wheels two axles
A04-122
2.0
Shoe replacement front outboard mounted single wheel
A04-152
0.7
Shoe replacement front outboard mounted both wheels
A04-157
1.2
Shoe replacement rear outboard mounted single wheel
A04-153
0.9
Shoe replacement rear outboard mounted one axle
A04-158
1.4
Shoe replacement rear outboard mounted two axles
A04-159
2.8
WARRANTY INFORMATION
Warranty Claim Coding:
Group: 04091
Noun:
013
OTHER RESOURCES
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, Inc.
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- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
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TSB/Document ID: IK0400088
Replacement Service Bulletin Number:
MFR Communication Date: 2016-04-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, AIR:DRUM:DRUM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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