# Service bulletin SIL 848

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: 10210275
- Published by NHTSA: 2022\-04\-14
- Manufacturer's number: SIL 848
- Manufacturer's date: 2022\-04\-13
- NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT

## NHTSA's summary

Altec has learned that the engine on certain AT35/37/40G and AT37/41/48 ME/PE aerial devices built from August 2020 to August 2021 on Ford F\-450/F550/F\-600 gas engine chassis equipped with a JEMS S/SE hybrid system could not enter idle mitigation system \(IMS\) engine shut down properly when the Jobsite Energy Management System \(JEMS\) is actuated at a cold ambient temperature with a cold engine block. When shutdown is attempted, the engine will stutter but will remain running. If this happens five times in a row, it will cause the JEMS service light to turn on and the JEMS to become inactive. To resolve this issue, the base idle setting for IMS shutdown must be updated by Altec.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10210275-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10210275-9999.pdf)

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

## Components

Engine, Equipment and accessories

## Vehicles listed

- 2020 to 2021 ALTEC AERIAL DEVICE JEMS HYBRID

JSON: [/v1/bulletins/10210275](/v1/bulletins/10210275)

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