# Service bulletin M1492

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: 10174726
- Published by NHTSA: 2020\-05\-05
- Manufacturer's number: M1492
- Manufacturer's date: 2020\-04\-30
- NHTSA component: EQUIPMENT; POWER TRAIN

## NHTSA's summary

SERVICE BULLETIN M1492: 2017 \- 2019 TOURING \- MILWAUKEE EIGHT \- INNER PRIMARY VENT. PURPOSE. Revision. Harley\-Davidson has learned that a small percentage of dealers and customers are finding low transmission oil levels and high primary oil levels during normal maintenance intervals. This could indicate that oil is transferring from the transmission case to the primary housing through the transmission mainshaft. A inner primary vent service kit \(Part No. 26500027\) is now available to address this issue. The kit allows the primary to breath and prevents excessive pressure.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10174726-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10174726-9999.pdf)

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

## Components

Equipment and accessories, Transmission and driveline

## Vehicles listed

- 2017 to 2019 HARLEY\-DAVIDSON TOURING

JSON: [/v1/bulletins/10174726](/v1/bulletins/10174726)

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