RELAY VALVE (7, Figure 7-1) For information, concerning the relay valve, see the Manufacturers Data following
Remove tubing assemblies (10,1 1,12,13, Figure 7-2) from the realy valve. Remove relay valve (7, Figure 7-
1) mounting hardware Replace tubing assemblies in the reverse order of disassembly.
See manufactures data on relay valve
AIR RESERVOIR- (8, Figure 7-1):
Disassembly. To disassemble the air reservoir assembly, proceed as follows
Before disassembly of the air tank open reservoir manual drain valve.
Disconnect tube assemblies (12,14, Figure 7-2) from the air reservoir (8, Figure 7-1). Remove air
reservoir (8) mounting hardware and brackets.
The square head plug (8, Figure 7-1) need not be removed from the air reservoir. Unscrew and remove
the connector, street tee, connector and drain cock.
Cleaning. Refer to paragraph 6.2. b for general cleaning requirements.
Inspection. Refer to paragraph 6.2.c for general inspection requirements.
Repair or replacement. Refer to paragraph 6.2.d general or replacement requirements.
Assembly. To assemble the air reservoir (8, Figure 7-1), proceed as follows:
Screw the drain cock and connector into the street tee. Attach the street tee to air reservoir (8). Screw
connector into air reservoir.
Position the air reservoir (8) and air reservoir mounting brackets into the mounting plate, and attach the
mounting brackets to the mounting plate using the mounting hardware (locknuts).
Attach tube assemblies (14,12, Figure 7-2) to the air reservoir (8, Figure 7-1) and make sure that the
drain cock is closed.
AUTOMATIC DRAIN VALVE: ( 23, Figure 7-1 )
Disassembly. To disassemble the automatic drain valve, proceed as follows:
Open the tank manual drain cock before any disassembly of the air system is performed.
The bowl (1, Figure 7-11) may be removed from the drain valve without disassembling the
drain valve from the trailer frame.
Unscrew and disengage tube assembly (14, Figure 7-2) at the drain valve (23, Figure 7-1).
Unscrew and remove the drain valve mounting hardware and drain valve from trailer frame. The
straight connector and square head plug do not have to be