Many of you will know that there are many damping valves used in Major's. The first one, E1ADDN-993113 is very rare, by June 52 it was already replaced by E1ADDN-993113B. From 1425097 it was replaced by 510E-993113, which would outlast its use on tractors in lorries. Finally, from 1539230 E1ADDN-993113C replaced the previous one, this requires thinner suction pipe E1ADDN-993139D. This last valve wasn't used on lorries.
Sandy
