TIB 16-036; T270 & T370 ADB/RSD Stopper Campaign

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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

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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

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Attachments
TIB 16-036 Chassis List.xls

TIB 16-036 Customer Letter.pdf

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