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Trailer
System-Guard
Dryer
If the trailer is equipped with an R-12P
valve, the trailer systems guard must be
mounted upstream of the R-12P
FIGURE 4 -TRAILER SYSTEM-GUARD
2. Connect the supply and control lines to the Trailer
System-Guard
™
air dryer making sure to keep the control
and supply circuits separate as shown. Do not switch
lines end to end. All ports are identified as indicated in
figures 1 and 2.
3. Affix the Alcohol Warning Decal to the trailer bulkhead.
Before applying the decal remove all oil and road
contaminants from the mounting location with a good
cleaning solvent.
OPERATIONAL TEST
Build the air system to governor cutout. Shut off the engine.
Using a soap solution, check all lines and fittings leading
to and from the Trailer System-Guard
and integrity. Repair any excessive leaks - exceeding a 1"
bubble in 5 seconds - before restoring vehicle to service.
"12 IN
SUP"
™
Air
"22 OUT
SUP"
Supply
Spring
Brake
Valve
™
™
valve.
™
AIR DRYER PLACEMENT
™
air dryer for leakage
"11 IN
CONT"
"21 OUT
CONT"
Spring
Brake
R-12
™
Relay
Valve
Reservoir
5
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