# Service bulletin SIL 744

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: 10175596
- Published by NHTSA: 2020\-05\-27
- Manufacturer's number: SIL 744
- Manufacturer's date: 2020\-03\-30
- NHTSA component: EQUIPMENT

## NHTSA's summary

Service Information Letter 744 notified customers that the mounting hole for the return filter on the hydraulic reservoir was produced over\-sized on the affected units. This can cause the O\-ring between the return filter head and the reservoir to not seal properly which can result in potential water intrusion. Altec has designed an adapter plate and gasket to provide the correct hole diameter for the proper sealing of the O\-ring. Order the Return Filter Seal and Plate Kit, part number 990875329, by calling 1\-877\-GO ALTEC \(1\-877\-462\-5832\). Altec suggests that the kit be installed no later than the next regular maintenance interval or 90 days from the receipt of this SIL, whichever comes first. This repair

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10175596-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10175596-9999.pdf)

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

## Components

Equipment and accessories

## Vehicles listed

- 2017 to 2019 ALTEC DIGGER DERRICK

JSON: [/v1/bulletins/10175596](/v1/bulletins/10175596)

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