Remove dust cap from rear roadside vapor collection adapter (4). Remove dust cap from
front port (1). Open butterfly valve (2) (see paragraph 2-2). Remove cover from rear inlet (3)
and place a wedge of wood against diaphragm plate to open rear inlet adapter.
(3) Inside cabinet, pull emergency
valve and vapor vent control lev-
(4) Pull on sump drain control lever
(7) to open sump drain (8). Prop
control lever open with a block of
wood. Remove nut (10) from
bleeder valve at emergency valve
(9) under rear of semitrailer.
Place conductive metal or galvanized pails under following drain points: front port (1) and
sump drain (8). Ground pails to semitrailer and to semitrailer's common ground (see para-