3
Inspection and Maintenance
9
Meritor
Maintenance Manual 14R (Revised 12-18)
Figure 3.4
WARNING
Verify that all personnel are clear of the trailer before you
inflate or deflate the air springs. The air suspension system
has various pinch points that can cause serious personal
injury.
3.
Check the air supply to the height control valve. A minimum of
65 psi (448 kPa) is required to correctly test the height control
valve.
4.
Rotate the lever UP 30 to 45 degrees. Air should begin to flow
into the air springs.
5.
Rotate the lever to the neutral position. Airflow should stop.
6.
Rotate the lever DOWN 30 to 45 degrees. Air should begin to
flow out of the air springs.
7.
Rotate the lever to the neutral position. Airflow should stop.
앫
If the air does not flow to and from the air springs:
Drain the air from the system. Use compressed air to clean
the screens in the supply and delivery ports.
8.
Connect the air lines to the height control valve and repeat the
above steps.
앫
If air still does not flow to and from the air springs, or if
the airflow cannot be stopped in the neutral position:
Replace the height control valve.
9.
Inspect the height control valve for air leaks and a cracked
lever arm housing.
앫
If air leaks or cracks are detected:
Replace the height
control valve.
Axle Inspection and Maintenance
For correct inspection and maintenance procedures and intervals,
refer to Maintenance Manual 14, Trailer Axles. To obtain this
publication, refer to the Service Notes page on the front inside cover
of this manual.
Lubrication
The RideSentry™ MPA Series slider box or suspension does not
require lubrication. For lubrication and maintenance requirements
for axles, hubs and brakes, refer to Maintenance Manual 14, Trailer
Axles; and Maintenance Manual 1, Preventive Maintenance and
Lubrication. To obtain these publications, refer to the Service Notes
page on the front inside cover of this manual.
Figure 3.4
400
6
712
a
HEIGHT
CONTROL
LINKAGE
30°-45°
30°-45°