# Service bulletin TSB\-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: 10146245
- Published by NHTSA: 2018\-10\-29
- Manufacturer's number: TSB\-034
- Manufacturer's date: 2018\-09\-21
- NHTSA component: POWER TRAIN

## NHTSA's summary

The finish on the cross members used in some of the Quantum VP trailers can have an effect on the ability of the upper cylinder support collar fasteners to retain torque. The finish can creep from under the head of the bolt over time, which can result in a loss of torque on the fastener. A new fastening technique has been developed to help distribute the load to reduce the effect of the cross member finish. In addition a new longer bolt was added to accommodate the addition of a locking washer.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146245-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146245-0001.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- QUANTUM FUEL SYSTEMS LLC. CNG FUEL TANK

JSON: [/v1/bulletins/10146245](/v1/bulletins/10146245)

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