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Service bulletin C1763B

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10086330
Published by NHTSA2016-12-15
Manufacturer's numberC1763B
Manufacturer's date2016-04-26
NHTSA componentENGINE

NHTSA's summary

THIS IN-SHOP CAMPAIGN IS BEING ISSUED TO ADDRESS O-RING LEAKS IN CERTAIN ISX/QSX CM2250, CM2250 SN, CM2350 LUBE COOLER HOUSINGS RESULTING FROM SUSPECT O-RING MATERIAL. CERTIFIED REPAIR LOCATIONS ARE AUTHORIZED TO REPLACE THE O-RINGS ON THE LUBE OIL COOLER HOUSING. THIS IN-SHOP CAMPAIGN CAN BE COMPLETED ANYTIME THE UNIT IS IN FOR MAINTENANCE OR REPAIRS, WITH CERTAIN RESTRICTIONS ON REIMBURSEMENT.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
CUMMINS ISX15

Listing a model year does not mean every vehicle of it is concerned: the document says which.