TSB180025-022720

Service Bulletin Details

Public Details for: TSB180025-022720

This technical service bulletin describes the verification and resolution to fault codes: 146, 151, 1962, 2646, 2963; improper function of the coolant thermostat; excessive coolant temperature; or, engine unable to reach operating temperatu


- 9999 -

Models from 9999
9999 CUMMINS ISL 9
9999 CUMMINS L9 
Damaged Coolant Thermostat Caused by Fault Codes 146, 151, 1962, 2646, and 2963
Page 1 of 2
Technical Service Bulletin
Technical Service Bulletin:
Released Date: 28-Feb-2018
TSB180025
Damaged Coolant Thermostat Caused by Fault Codes 146, 151, 1962, 2646,
and 2963
Damaged Coolant Thermostat Caused by Fault
Codes 146, 151, 1962, 2646, and 2963
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
•
•
•
•
ISL9 CM2250
ISL9 CM2350 L101
L9 CM2350 L116B
L9 CM2350 L123B
Issue
Symptom:
• Fault Codes
◦ 146
◦ 151
◦ 1962
◦ 2646
◦ 2963
• Improper function of coolant thermostat.
• Excessive coolant temperature.
• Engine unable to reach operating temperature.
Root Cause:
https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180025.html
3/2/2018
Damaged Coolant Thermostat Caused by Fault Codes 146, 151, 1962, 2646, and 2963
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• Fatigue malfunction caused by hydraulic pressure.
Verification
Inspect coolant thermostat for damage. See Figure 1.
Figure 1, Coolant Thermostat with Scuffing and Cracks.
Resolution
Replace coolant thermostat. Refer to Procedure 008-013
(/qs3/pubsys2/xml/en/procedures//-008-013.html)in corresponding Service Manual
Document History
Date
2018-2-27
Details
Module Created
Last Modified: 28-Feb-2018
https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180025.html
3/2/2018

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