to sensor 70 at all times briefly oil reservoir 82 is pressurized by air reservoir 28 line 86 leads from air reservoir 28 to air valve 88 which is a three way type having a vent 90 and an output 92 valve 88 is connected via output 92 to bracket 94 which is fixed to oil reservoir 82 as shown oil reservoir 82 may be a generally cylindrical tank as shown and due to the pressurization as will be more fully described hereinafter may be located anywhere where there is space about the vehicle the output line 92 of valve 88 is attached to a bracket 94 which is in turn attached to the top of reservoir 82 a flexible yet pressure resistant hose 96 connects line 92 to quick disconnect fitting 98 of the type commonly used for air tools and the like which is in turn attached to elbow 100 which leads into reservoir 82 this air line upon opening of valve 88 serves to pressurize reservoir 82 flexible hose 96 is fastened to the top of a filler cap 104 which is secured by a cam loc fitting 102 of the type well known in the art the length of hose 96 is.