# Service bulletin TSB170057\-042620

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: 10110334
- Published by NHTSA: 2017\-08\-04
- Manufacturer's number: TSB170057\-042620
- Manufacturer's date: 2017\-04\-26
- NHTSA component: ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE; EQUIPMENT:MECHANICAL

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of the hard start or fault code 559 or 4691 caused by an air leak in fuel system caused by incorrect installation of Navistar® supplied washer between Navistar® supplied fuel inlet fitting and Cummins® supplied priming pump filter head.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10110334-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10110334-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Equipment and accessories, Fuel system

## Vehicles listed

- CUMMINS B6.7
- CUMMINS ISB6.7

JSON: [/v1/bulletins/10110334](/v1/bulletins/10110334)

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