Hendrickson TIREMAAX PRO, Technical Procedure

Page: 51 / 60

51
T51002 E
InstallatIon, servIce and troubleshootIng Procedures
CHECKING PRO COlD TARGET PRESSURES
Follow this procedure to check cold target pressures
(Figure 52) for TIREMAAX PRO systems.
IMPORTANT: The TIREMAAX PRO target gauge
(Figure 53) is required for this
procedure. The PRO regulator does not
self exhaust which could result in false
readings.
Available clean, dry shop air supply
must be at least 15 psi above cold
target (inflation) pressure for this
test.
1. Chock wheels or otherwise immobilize trailer .
2. locate controller on the trailer. Ensure supply
valve is in closed position. Refer to Figure 49 on
page 47.
3. Open controller cover, remove test port vent, if
included, and connect target gauge (Figure 53) to
the test port (Figure 52).
IMPORTANT: Ensure target gauge shop supply
valve is closed and the pressure relief
button is not pressed while installing or
removing target gauge.
4. Charge tank by connecting clean, dry shop air
supply to emergency brake and target gauge.
Once charged, disconnect from emergency brake
gladhand (Figure 53).
5. Check PRO INFLATION Pressure.
A. Ensure target gauge shop supply valve is
closed.
B. Open controller supply valve on the supply
line.
C. Press and release the pressure relief button.
D. Read and record target gauge pressure.
NOTE: Delivery inflation pressure should be at
the specified cold target pressure on the
controller decal (Figure 44 on page 36).
6. Check PRO DEFLATION Pressure.
A. Close the controller supply valve.
B. Open the shop supply valve. You should hear
air exiting the valve.
C. Close the shop supply valve. Air should stop
exiting after 45 to 60 seconds.
D. Read and record the target gauge pressure.
This is the current Deflation Pressure.
7. Compare measured INFLATION and DEFLATION
pressure readings to desired settings.
NOTE: Delivery deflation pressure should be
10 psi higher than the specified cold target
pressure on the controller decal (Figure 44 on
page 36).
A. If not at specified cold target pressure
settings, refer to TROUBLESHOOTING on
page 37.
B. If adjusting target pressures, proceed to
ADJUSTING PRO COLD TARGET PRESSURES.
8. Close controller supply valve on the supply line.
9. Disconnect shop air supply at target gauge.
10. Disconnect target gauge from controller test port.
11. Reinstall text port vent, if included, in store
position.
12. Close controller cover and open controller supply
valve to restore system to normal operation.
ADJUSTING PRO COlD TARGET PRESSURES
Two target pressures, inflation and deflation, are set
for TIREMAAX PRO systems. Deflation must be set
10 psi above inflation pressure.
Before making adjustments, perform CHECKING PRO
COLD TARGET PRESSURES on page 51 to Step 4.
NOTE: To properly perform this procedure, there must
be sufficient air pressure in the trailer air tank
and the emergency brakes must be set.
If increasing target pressures, ADJUST PRO
DEFLATION PRESSURE, then ADJUST PRO INFLATION
PRESSURE.
If decreasing target pressures, ADJUST PRO
INFLATION PRESSURE, then ADJUST PRO DEFLATION
PRESSURE.
Adjust PRO INflATION Pressure
Use this procedure to adjust inflation delivery pressure
for TIREMAAX PRO controller.