TIB-16-036

TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign
Page 1 of 3
SB-10044091-2759
Technical Information Bulletin
16-036
Section
Suspension - 16
Subject
T270 & T370 ADB/RSD Stopper Campaign
Release Date
3/29/2012
Condition
Chassis listed may have been built with the wrong size front spring stopper. See Background section for
description of performance characteristics.
Chassis Affected
78 T270s & T370s built between 07/15/11 - 02/16/12 and equipped with Air Disc Brakes (ADB) or with
Reduced Stopping Distance (RSD). See the attached Chassis List, Dealer-Customer-Chassis List and
Customer Letter.
TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign
Page 2 of 3
Action
Inspect and, if necessary, service all chassis affected that enter your dealership, even if the customer has no
issue with the chassis. Use the procedure below. Review DWC or SIR online systems to verify that campaign
“16-36” is still open or already completed prior to performing this repair.
Warranty
Through Basic Vehicle Warranty or for repairs completed by 04/01/13, whichever is greater, Kenworth will pay
for parts at dealer net, plus applicable mark-up and labor. Use the appropriate Quick Claim, described below.
Selection of appropriate claim depends upon chassis condition, as described in the repair Procedure.
Quick Claim 16-36a for inspection only, no repair required, includes 0.3 hour labor
Quick Claim 16-36b for bracket, bolts, washers, markup and 1.3 hour labor
Quick Claim 16-36c for bracket, bolts, washers, bumper, markup and 1.3 hour
labor
CLAIM CODING
Failure Loc: 016-002-005
Failure Type: 470
SRT Code: 016-001-XXX
Work Accomplished: 35
Responsibility: 01
Campaign Code: 16-36
Claim Type: N
Parts
Parts are available from PACCAR Parts.
Note: Not all repairs require all parts listed. See Procedure for detail.
Quantity
2
4
2
2
4
4
4
1
Part Number
B11-1041-2
HWC12248
HWC10050
A00180-75AG00
60500ZYEL
HWC07936
HWC12501
shop supplies
Description
Windup Bumper Bracket
Hardened washer (for rubber bumper mount)
M10 hex bolt (for rubber bumper mount)
Rubber bumper
16mm frame bolt
5/8” frame mount washer
Nut
spray paint
Background
Recent U.S. Federal Motor Vehicle Safety Standard (FMVSS) regulation changes require Reduced Stopping
Distance (RSD) technology, which has resulted in increased torque load between the axle-brake assembly
and the front spring. To accommodate smooth ride characteristics and eliminate potential for reverse spring
arch, Kenworth has incorporated a stopper between frame and spring, including a contact dampening windup
bumper.
Different chassis configurations require different stopper sizes and on the chassis listed, some stoppers were
too long, which will overly restrict spring movement and could result in a rough ride.
Procedure
TIB 16-036 Procedure.pdf
TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign
Page 3 of 3
Attachments
TIB 16-036 Chassis List.xls
TIB 16-036 Customer Letter.pdf
Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and content accessed through this
system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly confidential pursuant to the
contract licensing such access. Disclosure, publication, release or distribution of any material found on PACCAR systems to any person other
than employees with a need to know such information is strictly prohibited. All activity on this system is monitored. If PACCAR suspects or
discovers any unauthorized activity, access may be immediately terminated without prior notification. Violators may be subject to legal action.
© Copyright 2012 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or concerns about this
page, please contact the DealerNet Webmaster.

TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign
Page 1 of 3
SB-10044091-3086
Technical Information Bulletin
16-036
Section
Suspension - 16
Subject
T270 & T370 ADB/RSD Stopper Campaign
Release Date
3/29/2012
Condition
Chassis listed may have been built with the wrong size front spring stopper. See Background section for
description of performance characteristics.
Chassis Affected
78 T270s & T370s built between 07/15/11 - 02/16/12 and equipped with Air Disc Brakes (ADB) or with
Reduced Stopping Distance (RSD). See the attached Chassis List, Dealer-Customer-Chassis List and
Customer Letter.
TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign
Page 2 of 3
Action
Inspect and, if necessary, service all chassis affected that enter your dealership, even if the customer has no
issue with the chassis. Use the procedure below. Review DWC or SIR online systems to verify that campaign
“16-36” is still open or already completed prior to performing this repair.
Warranty
Through Basic Vehicle Warranty or for repairs completed by 04/01/13, whichever is greater, Kenworth will pay
for parts at dealer net, plus applicable mark-up and labor. Use the appropriate Quick Claim, described below.
Selection of appropriate claim depends upon chassis condition, as described in the repair Procedure.
Quick Claim 16-36a for inspection only, no repair required, includes 0.3 hour labor
Quick Claim 16-36b for bracket, bolts, washers, markup and 1.3 hour labor
Quick Claim 16-36c for bracket, bolts, washers, bumper, markup and 1.3 hour
labor
CLAIM CODING
Failure Loc: 016-002-005
Failure Type: 470
SRT Code: 016-001-XXX
Work Accomplished: 35
Responsibility: 01
Campaign Code: 16-36
Claim Type: N
Parts
Parts are available from PACCAR Parts.
Note: Not all repairs require all parts listed. See Procedure for detail.
Quantity
2
4
2
2
4
4
4
1
Part Number
B11-1041-2
HWC12248
HWC10050
A00180-75AG00
60500ZYEL
HWC07936
HWC12501
shop supplies
Description
Windup Bumper Bracket
Hardened washer (for rubber bumper mount)
M10 hex bolt (for rubber bumper mount)
Rubber bumper
16mm frame bolt
5/8” frame mount washer
Nut
spray paint
Background
Recent U.S. Federal Motor Vehicle Safety Standard (FMVSS) regulation changes require Reduced Stopping
Distance (RSD) technology, which has resulted in increased torque load between the axle-brake assembly
and the front spring. To accommodate smooth ride characteristics and eliminate potential for reverse spring
arch, Kenworth has incorporated a stopper between frame and spring, including a contact dampening windup
bumper.
Different chassis configurations require different stopper sizes and on the chassis listed, some stoppers were
too long, which will overly restrict spring movement and could result in a rough ride.
Procedure
TIB 16-036 Procedure.pdf
TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign
Page 3 of 3
Attachments
TIB 16-036 Chassis List.xls
TIB 16-036 Customer Letter.pdf
Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and content accessed through this
system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly confidential pursuant to the
contract licensing such access. Disclosure, publication, release or distribution of any material found on PACCAR systems to any person other
than employees with a need to know such information is strictly prohibited. All activity on this system is monitored. If PACCAR suspects or
discovers any unauthorized activity, access may be immediately terminated without prior notification. Violators may be subject to legal action.
© Copyright 2012 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or concerns about this
page, please contact the DealerNet Webmaster.

CSC-10044091-2759
Date
Customer Name
Customer Address
Subject: TIB 16-036, T270 & T370 ADB/RSD Stopper Campaign
Dear Kenworth Customer,
Kenworth has initiated a campaign to inspect and, if necessary, replace incorrect front
spring deflection stoppers on certain T270 and T370 model vehicles manufactured July
15, 2011 to February 16, 2012, including the vehicle(s) listed by VIN on this letter.
Recent U.S. Federal Motor Vehicle Safety Standard (FMVSS) regulation changes
require Reduced Stopping Distance (RSD) technology, which has resulted in increased
torque load between the axle-brake assembly and the front spring. To accommodate
regulations but maintain smooth ride characteristics and eliminate the potential for
reverse spring arch, Kenworth has incorporated a cushioned stopper between frame
and spring.
Different chassis configurations require different stopper sizes and on the chassis
involved in this campaign, some stoppers were too long, which may overly restrict
spring movement and result in a rough ride.
Kenworth would like the opportunity to correct any chassis that were manufactured
with improper stoppers. Please contact a Kenworth dealership to schedule an
appointment for this work. You can find the nearest Kenworth dealer at Dealer Locator
on the website www.Kenworth.com.
When contacting your selected Kenworth dealer, refer to campaign TIB 16-036 and the
VIN listed on this letter. The repair will take less than two hours and there will be no
charge to you if completed within your Basic Vehicle Warranty (typically 1 year or
100,000 miles/ 160,000 km) or by April 1, 2013, whichever is greater.
We apologize for this inconvenience but ask for your cooperation to ensure continued
satisfaction with Kenworth products.
Thank you,
Mike Kalkoske
Director, Quality Services
Kenworth Truck Company