SPRING AND RELAY VALVES REPLACEMENT
Ground Boards Emplaced
Sealant, Silicone (WP 0086 00-3)
Landing Legs Down
Lock Washers (WP 0080 00-13)
Lock Nuts (WP 0080 00-13)
Semitrailer Disconnected from Prime Mover
Air Brake Reservoirs Drained
Tools /Test Equipment
Tool Kit, No. 1 Common (WP 0077 00-9)
Wear protective goggles when underneath semitrailer and opening
drain valve. Avoid the air stream. Ensure all pressurized air has
been drained from system. Failure to do so could result in injury
Retain plugs and save after removal.
The air lines connected to the air brake chamber control and relay valves
must be tagged and removed prior to these procedures.