MAINTENANCE OF AIR BRAKE SYSTEM - Continued
General mechanics tool kit
a. Relay Valves.
(a) Drain air tanks.
(b) Tag and disconnect four hoses (1 through 4) from relay valve (5).
(c) Disconnect tube and nut assembly (6). Remove connector (7).
(d) Turn relay valve (5) counterclockwise to remove from tank (8).
Use anti-seize tape on all pipe fittings.
(a) Position relay valve (5) on nipple on tank (8). Turn clockwise to install.
The valve must be vertical and the joint tight.
(b) Install connector (7) on relay valve (5). Connect tube and nut assembly
(6) to connector making sure compression insert bottoms in connector.
(c) Install four hoses (1 through 4).