STEMCO Aeris - Manual (Page 15)

Aeris Installation and Service Manual
Page 15 of 42
Figure 9
Component Installation Instructions
• Wheels on each wheel end (dual tires) must have the valve stems clocked approximately 180° apart for
installation of airlines to Aeris hubcap and valve stems on tires. Clocking should be done prior to installing
Aeris system. See Figure 10
Clocking Wheels
• Clocking dual wheels is important. Proper clocking allows the inner and outer valve stems to align with the
hose attachment fittings on the Aeris hubcap. Wheels with 2 hand holes can be clocked so the valve stems
are exactly 180° apart, but the valve stems on 5 hand holes cannot be clocked exactly 180° apart. It may
be necessary to remove the outer tire and rotate it to clock wheels properly.