Hi There
There does not apear to be a photo of the 1AJ at that link.
Or information that it existed.
I used to use a 1EJ but that had a power auto cycle gearbox.
Can you post a photo?
I would think it would be easy to drop the gearbox off and find out what is not working before you call someone in. Might be something silly you could fix easily.
From the serial number of an Adcock and Shipley you should be able to work out the year and month of manufacture.
I can't remember how to do this but could probably work it out if you post the serial number.
(The year would help if you need spares.)
regards David