TSB160008-050120

New Intake and Exhaust Rocker Levers
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Technical Service Bulletin
Technical Service Bulletin:
Released Date: 01-May-2018
TSB160088
New Intake and Exhaust Rocker Levers
New Intake and Exhaust Rocker Levers
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
• ISX (All 15 Liter Versions)
• QSX (All 15 Liter Versions)
• X15 (All Versions)
Description of Change
This document announces the release of new intake and exhaust rocker levers with cam
follower roller pin changes.
Reason for Change
The changes to the roller pins and lubricating oil feed in the new rocker levers improve
robustness against corrosion and debris related damage in the roller to roller pin joint.
Service Instructions
 CAUTION 
New and used rocker levers must be lubricated as directed in the Service Manual.
Severe engine damage can result if rocker levers are not properly lubricated.
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Lubrication of the roller pins has always been advised for rocker levers but emphasis is
placed on this guidance as the result of lubricating oil feed changes on the new rocker
levers. See the corresponding Service Manual. Reference Procedure 003-009 in Section
3.
Service Parts Availability
Service parts are available. See Table 1 for part numbers.
Table 1, Service Parts
Part
Description
Existing Part
Number
Obsolete
Superseded
New Part
Number
Front Exhaust
Rocker Lever
4318204
Yes
Yes
4386045
Rear Exhaust
Rocker Lever
4318205
Yes
Yes
4386046
Front Intake
Rocker Lever
4318206
Yes
Yes
4386047
Rear Intake
Rocker Lever
4318207
Yes
Yes
4386048
Part Compatibility
The new rocker levers are interchangeable, and can be intermixed within an engine.
These components are backwards compatible per the compatibility table in TSB120053.
Note : Some engines built after the engine serial number (ESN) first may
contain a mix of existing and new part numbers.
Part Identification
Existing rocker lever design has:
• A bronze colored, solid pin. See Figure 1 below.
New rocker lever design has:
• A roller pin which is black in color. See Figure 2 below.
• A drilling on bottom leg of rocker lever. See Figure 3 below.
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Figure 1, Existing Exhaust Rocker Lever With Bronze Pin.
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Figure 2, New Exhaust Rocker Lever With Black Roller Pin.
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Figure 3, New Exhaust Rocker Lever With Drilling
Normal vs Abnormal Rocker Lever Appearance:
Pin Protrusion: Since the introduction of the new pin design, in some cases, it has been
identified to have the cam follower pin to be protruding out of the side of the rocker lever
cast surface. This condition is often associated with a pin and roller seizure issue (See
Figure 3 below). Visual appearance condition does also exist on new production parts
and is considered normal. Graphics below provide an anticipated range of pin position
(See Figure 4 below). Amount of pin that protrudes may vary due to normal
manufacturing processes. If rocker levers are found to exceed specifications provided,
rocker lever may need replaced.
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Figure 4, Pin Protrusion Associated with a Malfunction.
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Figure 5, Pin Protrusion Specification.
Pin Protrusion Measurement Method and Specification
The pin location is determined by measuring the distance from the face of the cam
follower pin from the side of the rocker lever that has the thick cast leg (it is also the
surface that is on the same side of the lever as the adjusting screw) to the opposite thrust
face of the rocker lever. The specification limit for this distance is 25.25 +/- 0.3 mm.
Production Status
Implemented for production. See Table 2.
Table 2, Plant Information
ESN First
Build Date
Plant
79939646
1 September 2016
Jamestown Engine Plant
*Engine build date can be found on the engine dataplate
Publications Affected
Lubrication guidance is emphasized in the publications shown in Table 3.
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Table 3, Publications Affected
Manual
Engine
Bulletin
Number
Procedure
Title
Procedure
Section
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/1
73/173003-009-trprix13.html)
3
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/1
32/132003-009-trmixar5.html
)
3
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/1
75/175003-009tr.html)
3
Service
Manual
ISX15
CM2350
X101
ISX15
CM2250
ISX15
CM2250
SN
4310641
4022250
4310736
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Table 3, Publications Affected
Manual
Engine
QSX15
CM2350
X106
QSX15
CM2350
X105
QSX15
CM2250
ECF
Signature™
, ISX
CM570/CM
870/CM871
/CM871 E
Bulletin
Number
4332712
4332667
2883557
3666239
Procedure
Title
Procedure
Section
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/2
21/221003-009tr.html)
3
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/2
50/250003-009tr.html)
3
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/1
32/132003-009-trvqxi6.html)
3
Rocker
Lever
Assembly
Refer to
Procedure
003-009
(/qs3/pubsy
s2/xml/en/p
rocedures/1
0/10-003009-tr.html)
3
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Document History
Date
Details
2016-8-19
Module Created
2016-11-2
Added production status.
2018-4-27
Updated to reflect new roller design.
Last Modified: 01-May-2018
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