# Service bulletin SB\-16\-034

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: 10184978
- Published by NHTSA: 2021\-01\-04
- Manufacturer's number: SB\-16\-034
- Manufacturer's date: 2016\-11\-17
- NHTSA component: LANE DEPARTURE; FUEL SYSTEM, GASOLINE

## NHTSA's summary

COE Hydroboost Reservoir fluid overflow or aeration \- Trucks with hydraulic assist brake system. A subject vehicle may exhibit one or more of the following conditions: foaming/aeration of the hydraulic fluid in the hydroboost reservoir tank accompanied by noisy brake pedal operation, illumination of the red "Brake" warning lamp, or hydraulic fluid overflowing out of the hydroboost reservoir tank. If the vehicle exhibits these symptoms, the hydroboost reservoir tank requires replacement and the system must be flushed of contamination. Perform the repair procedure below to correct the situation.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10184978-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10184978-9999.pdf)

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

## Components

Driver assistance, Fuel system

## Vehicles listed

- 2017 HINO CONVENTIONAL MODELS
- 2015 to 2016 HINO CONVENTIONAL TRUCKS W/JO8

JSON: [/v1/bulletins/10184978](/v1/bulletins/10184978)

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