# Service bulletin TSB190198\-120220

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: 10170453
- Published by NHTSA: 2020\-01\-21
- Manufacturer's number: TSB190198\-120220
- Manufacturer's date: 2019\-12\-02
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of engine speed oscillation observed when water pumps and vacuum are in operation. Normal torque/speed governor and PTO tuning was changed to address the overshoot and engine oscillation.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170453-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170453-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS CUMMINS

JSON: [/v1/bulletins/10170453](/v1/bulletins/10170453)

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