44
T51002 E
InstallatIon, servIce and troubleshootIng Procedures
SERVICE PROCEDURES
This section includes service information and
requirements relative to TIREMAAX
®
PRO and CP
systems.
TOOlS REQUIRED
For a list of tools required to work TIREMAAX systems,
refer to L878 TIREMAAX Parts List.
TOOl
1
WHERE USED
CP Target Gauge
VS-32344
SETTING CP TARGET PRESSURE
on page 48
TIREMAAX PRO Target
Gauge VS-32331
SETTING TIREMAAX® PRO TARGET
PRESSURE on page 50
Tire pressure gauge
Checking tire pressures
1/8 inch hex key
Adjusting controller pressure
7/16 inch wrench
Tighten tire hose / valve stem
connection
Table 6:
List of required tools
INSPECTIONS AND INSPECTION INTERVAlS
Hendrickson recommends:
• Tires be inspected for wear and damage at regular
intervals.
• Check tire pressure at regular intervals using
the method described in MANUALLY CHECK
TIRE PRESSURE. Reference tire manufacturers’
guidelines for acceptable inspection intervals.
• At regular intervals, check TIREMAAX components
for air leaks and indicator lamp operation.
In addition to the periodic intervals listed below:
• All inspections should be completed any time
a tire is removed from the trailer or if any tire is
suspected to be at a low pressure condition.
• Always maintain current shop preventive
maintenance and pre-trip inspection practices.
• Any preventive maintenance practices followed for
general trailer air system inspections should also
be applied to the TIREMAAX system components.
EVERy THREE MONTHS
To test system integrity, perform the following:
1.
Check
indicator lamp, see INDICATOR LAMP TEST
2.
Manually check
all tires for a low pressure
condition by removing the tire hoses at the
hubcap using MANUALLY CHECK TIRE PRESSURE
3.
Inspect
all tire hoses to
ensure
that they are
secure.
EVERy 12 MONTHS
In addition to the above three month check, perform
the following:
1.
Inspect
all system connections for leaks.
Apply
soapy water to all air fitting connections, including
the axle vent. Bubbles in the soapy water will
provide a visual indication of an air leak.
All
connections must be air tight.
2.
Check
:
A. Regulator delivery pressure
(PRO and CP)
B. Pressure relieving module relief pressure
(PRO only).
IN THE EVENT Of A lEAK
Should a leak occur
in the system:
• A small leak in one or more tires will result in
continuous air flow in the lines.
– If the
flow rate is below the flow switch
monitored rate
(located in the controller),
the light will remain off and not affect system
performance.
– If the
flow rate is above the monitored rate
of the indicator lamp flow switch, the light will
remain on as long as the delivery pressure is
below the target pressure.
PRO Only:
•
If a system leak is large
enough to cause the
controller delivery pressure to fall below the shut-off
threshold of the wheel valve:
– The wheel valve(s) will close.
– With the wheel valve(s) closed, tires are
isolated from the controller and each other.
• If the
leak is too large to maintain tire pressure
,
the system can be temporarily disabled until
the system can be repaired. Refer to DISABLE
CHECKING fOR AIR lEAKS
If a leak is suspected and not obvious, perform this
procedure to locate leaks on air hoses, fittings and
components. Also perform this procedure as a system
integrity check after installation.