DOB 1300-1556| X3-45 Commuter PA-1648 Maintenance Manual Section 23 revised Nov 2021
FIGURE 36: SNOW CHAIN SYSTEM MAIN PNEUMATIC COMPONENTS
NOTE
DO NOT MIX OR INVERT LEFT &
RIGHT AIR REGULATORS.
Pneumatic actuators are equipped with air regulators at their air
supply connection (both upper and lower hoses).
Left (street side) air regulators have a different inner diameter than
the right (curb side) regulators.
• Left side regulators have an inner diameter of 0.6mm and a
plain hex body.
• Right side regulators have an inner diameter of 0.9mm and
can be easily identified by their groove around the hex body
(as shown in left picture).
• Clean the inside of the regulator if erratic movements of the
arm(s) are noticed.