2016 Altec Aerial Device

Altec has received notification from Parker Chelsea, the manufacturer, of an issue with some of their 281 and 890 Series PTOs. An unintended restriction in lubrication flow may produce elevated back pressure in cold-start scenarios, leading to partial engagement of the clutch. Once the vehicle reaches normal operating temperature, the clutch drag will abate. In extreme cases, repeated cold starts may result in clutch disk damage and failure to engage when activated.

Altec has learned that a 12-volt Airtronics relay installed in the PDM could have been manufactured to an insufficient threshold on certain units built from December 2004 to October 2022. This can cause the relay to overheat and fail, causing the accessory lights to stop working.

Altec has learned that certain digger derricks and aerial devices of various models built from January 2010 to January 2023 may contain access steps with a handrail and side plate that come together in a small space causing a potential pinch point. Altec has created a kit to eliminate the possible pinch point.

Altec has learned that the hydraulic ball valve on the hydraulic reservoir return line of certain L42/45 M/P units built from February 2002 to November 2019 might not get returned to the open position after being turned to the closed position for maintenance. If the upper boom drive system is articulated while the ball valve is in the closed position, both upper boom drive cylinders could retract simultaneously causing the lower boom to buckle. The customer should order and install the Hydraulic Shutoff Valve Placard Kit. The kit must be installed by the next preventative maintenance interval, or within 90 days of receipt of this notice, whichever comes first.

Altec has learned that on certain AT37-G aerial devices built from November 2007 to April 2018, the rear torsion bar swing arm can interfere with the long runner channels under the body as the torsion bar rotates during road travel. The interference can cause wear issues and can cause welds on the body mounting angles or cross members to develop cracks.

Owners of certain AT series and TA40/45 series aerial devices built on Dodge Ram 4500/5500 chassis from 2016 to 2022 received Altec Product Notice CSN 855 in May of 2022 calling for the inspection of fuel line securement. We have identified that the bracket(s) originally sent to properly secure the fuel line are incorrect. The correct replacement bracket(s) are included with this SIL.