TSB150182-111915

New Turbocharger Speed Sensor with Heat Reflective Wrap
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Technical Service Bulletin Number
TSB150182
Technical Service Bulletin
Subject
New Turbocharger Speed Sensor with Heat Reflective Wrap
Warranty Statement
The information in this document has no effect on present warranty coverage or repair
practices, nor does it authorize TRP or Campaign actions.
Contents
Product Affected

ISB4.5 CM2350 B104
Issue
Turbocharger speed sensors have been found to melt on heavy hybrid vehicles when
operating at higher vehicle speeds. The root cause of the issue is excessive radiated heat due
to operation at full load rated speed for extended periods of time.
This issue is specific to heavy hybrid buses. The maximum speed that the vehicle is capable of
reaching is lower than governed speed, leading to operation at full load at rated speed when
on open roads.
Resolution
When a turbocharger speed sensor replacement is required do the following:
For hybrid buses with a gross vehicle weight exceeding 12 metric tons, use the new
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12/2/2015
New Turbocharger Speed Sensor with Heat Reflective Wrap
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turbocharger speed sensor fitted with the heat reflective wrap.
For all other vehicles, use the existing part inventory on the shelf before ordering the new
turbocharger speed sensor.
Description of Change
The new turbocharger speed sensor is fitted with a heat reflective wrap to protect the material
surrounding the sensor electronics.
Service Parts Availability
Service Parts are available. See Table 1 for part numbers.
Table 1, Turbocharger Speed Sensor Kit Part Numbers
Part Name
Obsoleted Part Number
New Part Number
Turbocharger Speed Sensor Kit
4034169
4034273
Part Structure


The new turbocharger speed sensors are directly compatible with existing parts.
The new part number obsoletes and supersedes the existing part number.
Production Status
Implemented for production. See Table 2.
Table 2, Production Information
Product
Engine Serial Number
(ESN) First
Build Date1 Engine Plant
ISB4.5 CM2350
B104
89246263
2 July 2015
Beijing Foton Cummins Engine
Company
ISB4.5 CM2350
B104
22178453
17 August
2015
Darlington Engine Plant
1Engine build date can be found on the engine dataplate.
Document History
Date
2015-11-19
Details
Module Created
Last Modified: 23-Nov-2015
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12/2/2015
New Turbocharger Speed Sensor with Heat Reflective Wrap
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Copyright © 2000-2010 Cummins Inc. All rights reserved.
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12/2/2015