2008 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 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.

Product advisory posted on our web site to inform owners, user, & operators that the new ANSI A92.2-2021 standard has taken effect and they must review. The standard has changed some of the responsibilities of the parties who use or operate vehicle mounted aerial devices.

Structural cracking has been observed where the primary leveling cylinder mounting pin is welded to the lower boom side plate on LS 40/45/55 aerial devices. Failure of this connection could disable the hydraulic platform leveling system. Altec has developed a kit to reduce the relief pressure of the hydraulic leveling circuit. This will prevent damage to the leveling cylinder mounting pin weld joint by reducing the weld stress. Altec has also developed a kit to repair the lower boom if the side plate has cracked. Altec requires the inspection and repair be completed on the affected units by the next annual preventive maintenance interval or within one year of receipt of the SIL.

There may be inadequate weld fusion between the boom extension cylinder rod and rod end on the affected units. This can lead to failure of the weld. Altec has developed a process to have the cylinder rod end attachment repaired by the cylinder manufacturer. Altec requires the repair be completed on the affected units by the next annual preventive maintenance interval or within one year of receipt of the SIL.