TSB130127-021816

B Gas Plus CM556, B Gas International CM556, C Gas Plus CM556: Unstable Idle, Idle ... Page 1 of 5
Technical Service Bulletin Number
TSB130127
Technical Service Bulletin
Subject
B Gas Plus CM556, B Gas International CM556, C Gas Plus CM556: Unstable Idle, Idle
Surge, Stalls
Issue
Symptoms occur after Fuel Control Valve, Part Number 3933841, is replaced with Fuel Control
Valve, Part Number 4997684. A calibration update is required.
The Version 3 (V3) fuel control valve (FCV), Part Number 4997684, is not compatible with
older calibration versions. When an older FCV is replaced with a V3 FCV, idle instability,
surge, and stalling at idle can result.
Verification
Any B Gas Plus CM556, B Gas International CM556, or C Gas Plus CM556 engine with a V3
FCV, Part Number 4997684, is affected. V3 Fuel Control Valves may be identified by the “–V3”
designation next to the serial number, as shown below.
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Resolution
When replacing obsoleted FCV, Part Number 3933841, with the present FCV, Part Number
4997684, the engine calibration must be updated at the same time. Reference the table below
to determine which calibration is appropriate, based on the ECM Code presently in the engine.
B Gas Plus CM556 and B Gas International CM556 Engines
Previous ECM
Code
New ECM Code for Manual
Transmissions
New ECM Code for Automatic
Transmissions
R90017
R90181
R90180
R90019
R90098
R90125
R90020
R90110
R90136
R90021
R90097
R90124
R90022
R90109
R90135
R90028
R90100
R90127
R90029
R90101
R90128
R90036
R90144
R90144
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R90037
R90143
R90143
R90038
R90142
R90142
R90042
R90099
R90126
R90043
R90096
R90123
R90044
R90108
R90134
R90056
R90104
R90130
R90057
R90103
R90129
R90058
R90102
R90111
R90059
R90120
R90060
R90121
R90061
R90122
R90066
R90106
R90132
R90067
R90105
R90131
R90070
R90107
R90133
R90081
R90116
R90118
R90084
R90117
R90119
R90087
R90112
R90114
R90088
R90113
R90115
C Gas Plus CM556 Engines
Previous ECM Code
New ECM Code
R90001
R90152
R90002
R90148
R90003
R90156
R90004
R90151
R90005
R90147
R90006
R90155
R90007
R90150
R90008
R90146
R90009
R90154
R90010
R90158
R90011
R90157
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3/1/2016
B Gas Plus CM556, B Gas International CM556, C Gas Plus CM556: Unstable Idle, Idle ... Page 4 of 5
R90012
R90153
R90023
R90168
R90024
R90166
R90025
R90159
R90026
R90167
R90030
R90174
R90031
R90176
R90032
R90175
R90033
R90160
R90045
R90173
R90046
R90145
R90047
R90165
R90048
R90149
R90052
R90164
R90053
R90163
R90054
R90162
R90055
R90161
R90062
R90172
R90063
R90171
R90064
R90170
R90065
R90169
R90077
R90141
R90079
R90139
R90080
R90140
R90078
R90177
R90082
R90179
R90083
R90178
R90085
R90138
R90093
R90139
R90094
R90140
R90095
R90141
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Warranty Statement
The information in this document authorizes specific changes to the repair practice for failures
covered under product warranty coverages.
Document History
Date
2013-8-19
2013-12-6
2014-2-2
2016-2-18
Details
Module Created
Updates TSB to include additional engine family (C Gas Plus)
none
Updated B Gas Plus CM556 and B Gas International CM556 Engines table
with new ECM Code and ECM Code for Automatic Transmissions.
Last Modified: 19-Feb-2016
Copyright © 2000-2010 Cummins Inc. All rights reserved.
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3/1/2016