# Service bulletin FDM\-TSIB\-018

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: 10186129
- Published by NHTSA: 2021\-02\-01
- Manufacturer's number: FDM\-TSIB\-018
- Manufacturer's date: 2020\-12\-17
- NHTSA component: STEERING

## NHTSA's summary

This bulletin provides instruction to update the hydraulic steering system by adding an external pressure relief valve. Field reports of failed steering pump seals led to testing that determined internal recirculation of hot oil was the cause of the seal failures.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186129-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186129-9999.pdf)

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

## Components

Steering

## Vehicles listed

- 2020 OSHKOSH S\-SERIES

JSON: [/v1/bulletins/10186129](/v1/bulletins/10186129)

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