49
T51002 E
InstallatIon, servIce and troubleshootIng Procedures
a tire leak. Locate and repair leak. Refer to
CHECKING FOR AIR LEAKS on page 44.
C. Open supply valve and allow tires to inflate to
target pressure before continuing.
NOTE: Delivery pressure should be 5-6 psi higher
than desired cold target pressure due to the
“crack pressure” (a characteristic of the check
valves in tire hoses)
8. If necessary, continue to next procedure to adjust
cold target pressure.
9. Reference procedure Step 3 to Step 6 to remove
target gauge and restore system to normal
operation.
ADJUSTING CP DELIVERY PRESSURE
Before making any adjustments:
A. Perform CHECKING CP DELIVERY PRESSURE
on page 48. The target gauge should remain
installed from this procedure. If not, install per
previous procedure.
B. Disconnect all tire hoses at hubcaps. This reduces
adjustment response time for changes in regulated
pressure and increases accuracy.
NOTE: Delivery pressure is regulated by rotating
the regulator knob either clockwise or
counterclockwise (as viewed from the end of
the knob). Before the knob can be rotated, it
must be unlocked.
1. Unlock the regulator knob by pulling it away from
the regulator body (Figure 50).
2. From the results of the previous procedure:
A. If delivery pressure is too low, increase
delivery pressure by rotating the regulator
knob clockwise (as viewed from the end of
the knob).
IMPORTANT: Always approach the target pressure
setting from an increasing-pressure
direction.
B. If delivery pressure is too high,
i. Decrease it by rotating the regulator knob
counterclockwise (as viewed from the
end of the knob).
ii. Lower the pressure setting to at least
5 psi below the desired cold target
pressure setting.
iii. Turn knob clockwise again to the desired
cold target pressure setting.
3. Close controller supply valve on the supply line
(Figure 50).
4. Open petcock valve on the delivery line to vent the
system.
5. Remove CP target gauge from hubcap port.
If CP target gauge not used:
A. Remove pressure gauge from the delivery
port.
B. Reinstall delivery line and close petcock
valve.
6. If decreasing target pressure, manually depress
the check valve core at the end of each tire hose
to reduce tire pressure to 5 psi below target.
7. Reconnect all tire hoses to the hubcaps. Firmly
hand-tighten.
8. Open controller supply valve on the supply line.
9. When gauge pressure reaches target, MANUALLY
CHECK TIRE PRESSURE (using procedure on
page 46) of at least two tires.
10. If necessary, repeat CHECKING CP DELIVERY
PRESSURE on page 48 and this procedure (in
that order) until the pressure at the tire hoses is at
the desired cold target pressure per specifications.
RESTORE CP SYSTEM TO NORMAL OPERATION
Once cold target pressure is set:
1. Lock regulator knob by pushing it in toward the
regulator body (Figure 50). Ensure knob will not
rotate.
2. Close and latch controller enclosure.
3. Update decal on controller cover (Figure 44 on
page 36), if necessary.
4. Disconnect shop air supply from trailer air tank.
To Next Page
Loading...