ASPLUNDH AERIAL LIFTS:
       Models LR-40, LR-42, LR-45, LR-50, LRII-45, LRII-50
               Serial Nos. 86-8600 through 91-0138


Produced by:
Construction Health and Safety Program,
Ministry of Labour,
Alert 11/0695
ISSN 1195-5228

The Ministry of Labour recently investigated an accident that 
involved the failure of the upper boom drive cables of an aerial 
lift device produced by Asplundh Manufacturing.

In 1992 Asplundh issued Product Bulletins #120 and #121.  These 
warned owners of the aerial lifts specified above that they 
needed to replace certain parts.  The information was widely 
circulated, but it may not have reached some affected parties.

These models are equipped with a Dukes operating valve at the 
bucket controls.  The spool for this valve creates elevated 
pressures within the upper boom cylinders that are greater than 
required for normal operations.  These pressures cause internal 
damage to the drive cables and the dropping of the upper boom 
section.  The spool can be identified by the letter "A" stamped 
on its outside at the handle end.

Any owner of one of these aerial lifts that is equipped with a 
Dukes valve should make sure that both the spool and the drive 
cables are replaced in accordance with the manufacturer's Product 
Bulletins #120 and #121.

For more information or assistance, please contact your local 
Ministry of Labour office or an Asplundh dealer representative.