# Service bulletin C1638C

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.

- Type: Service bulletin
- NHTSA id: 10090111
- Published by NHTSA: 2017\-02\-01
- Manufacturer's number: C1638C
- Manufacturer's date: 2015\-08\-11
- NHTSA component: FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP

## NHTSA's summary

THIS CAMPAIGN IS TO REPLACE THE LUBRICATING OIL FILTER BYPASS VALVE. THE NEW BYPASS VALVE DESIGN HAS MORE EFFECTIVE SEALING CAPABILITY AND PROVIDES BETTER PROTECTION TO FUEL PUMP LUBRICATED COMPONENTS.

## 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

Fuel system, Fuel pump

## Vehicles listed

- CUMMINS ISX12
- CUMMINS ISX15

JSON: [/v1/bulletins/10090111](/v1/bulletins/10090111)

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