The NOx Reduction System Cooler May Fail on Certain C27 and C32 Engines {108C} Caterpillar

Electric Power Generation

C27 PET GEN SET (S/N: EGG1-UP)

Generator Set

C27 GEN SET (S/N: N1B1-UP; T4Z1-UP)

C32 (S/N: BT41-UP; WJD1-UP)

Industrial Engine

C27 (S/N: AT41-UP)

C27 INDUSTRIAL (S/N: JFJ1-UP; RAM1-UP)

C32 INDUSTRIAL (S/N: NST1-UP)

Locomotive Engine

C27 LOCO (S/N: WJC1-UP)

Off-Highway Truck/Tractor

777G (S/N: T5A1-UP; RDR1-UP)

Petroleum Engine

C27 PETROLEUM (S/N: NAR1-UP)

C32 PETROLEUM (S/N: SDK1-UP)

Quarry Truck

773G (S/N: JWS1-UP; T5T1-UP)

775G (S/N: T5F1-UP; MJS1-UP)

Track-Type Tractor

D10T2 (S/N: JJW1-UP)

D11T (S/N: JEL1-UP; JNS1-UP)

Wheel Dozer

844K (S/N: MBE1-UP; M4R1-UP; K4Y1-UP)

854K (S/N: KK31-UP; KK61-UP; H8M1-UP)

Wheel Loader

990K (S/N: A9P1-UP; M9P1-UP; K9X1-UP)

992K (S/N: 8801-UP; KK21-UP; KK41-UP)

993K (S/N: Z4D1-UP; Z8D1-UP; Z8Z1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

C27 and C32 Tier 4 interim and Tier 4 final NOx Reduction System (NRS) coolers may have contingent damage when there is another cooling system failure.

Solution

Depending on the temperatures reached on the NRS cooler during the failure, additional inspection and/or replacement of the opposing cooler will be required. A low temperature failure of one cooler will require inspection of the opposing cooler and validation of the cooler per the reuse and salvage guidelines. A high temperature failure or repeat failure on one side of the engine will require both coolers being replaced.