The WB-MS10-AA is a WORKBENCH Bench frame with built-in attachment receiver. This will replace the undercarriage frame to upgrade the old WB-MS bench frame to accept current line of attachments. Please note that this upgrade will NOT work with WB-MS systems purchased before 2008.
System models compatible with the WB-MS10-AA are those, with the workbench, that have the semicircle adjustment bracket (see image below). In addition, if the front linkage tube measures 11” or 11 ½”, it must be replaced with one that measures 9 ½”. This can be ordered from Powertec’s Parts and Service department – part No. WB-MS10-6.