Luvax Vane or Rotor Type of Hydraulic Shock Absorbers, which were fitted as standard equipment on a number of British cars prior to 1939, are of three types:
1) The Constant Pressure Non-Adjustable Type; 2) The Adjustable Type; 3) The Finger-Tip Control Type
Certain instructions issued by the makers of these shock absorbers are common to all three types.