Altec has learned that the hydraulic ball valve on the hydraulic reservoir return line of certain L42/45...
Altec technical service bulletin SIL-3052 for 2002-2019 Altec Aerial Device.
- Bulletin number
- SIL-3052
- Component
- Equipment
- Summary
- 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.
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