LDV Convoy Air Suspension Workshop Manual is now available for sale here in my eBay shop.
Suitable for the Leyland DAF 400 Series and the later Convoy.
The LDV Convoy Air Suspension has two systems, the early system fitted to the 400 Series from about 1994/5 and then a modified system was fitted from after vehicles with vin number 23669.
The LDV Convoy Air Suspension Manual listed here in my eBay shop covers both systems in detail.
More technical information is available from trymark-books.com