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Section 12: BRAKE AND AIR SYSTEM
Section 12 Updated Sept. 2015 X3-45 Commuter PA1593 DOB 2400-2489
7
Change cartridge every 100,000 miles (160 000
km) or once every two years, whichever comes
first. The air dryer may be purged for mainte-
nance purposes using the remote drain valve
located in the engine compartment and
accessible through the engine compartment
R.H. side door. The valve is positioned close to
the L.H. side of door opening (Fig. 2). The air
filter/dryer has a built-in governor to maintain the
system between 108 psig and 123 psig.
Maintenance and repair information is supplied
in the maintenance information annexed to this
section.
7.1 AIR FILTER/DRYER PURGE TANK
A tank is supplied to purge the air filter/dryer to
remove moisture and contaminants.
8. HALDEX CONSEP
®
CONDENSER /
SEPARATOR
The Consep ® Air Pretreatment Condenser/
Separator is located in front of rear wheelhou-
sing (Fig. 1 & 6). Within the vehicle’s air brake
system, the Haldex Consep condenses,
separates and removes 90% of the oils, liquids
and other contaminants, while treating up to 30
SCFM. It reduces corrosion and possible failure
of air brake system components caused by
contamination and significantly increases the air
dryer desiccant life.
FIGURE 6: HALDEX CONSEP
CONDENSER/SEPARATOR
8.1 MAINTENANCE
Mounted between the air compressor and the air
dryer, the compact Consep requires little
maintenance during its long service life. An
automatic drain valve installed on the Consep
saves time while ensuring that liquids are
removed regularly for optimum performance.
The drain valve’s integrated filter prevents
damage from large debris, while a built-in heater
prevents freeze up.
The Consep must be inspected periodically for
proper operation. The interval between
inspections is determined by the type of service
(every 6 months for City Transit). High
compressor duty cycles and high temperatures
can cause a buildup of carbon in the condenser,
drain valve and filter. This contamination must
be removed for proper operation.
Installation, Maintenance and Inspection
information is supplied in the maintenance
information annexed to this section under
reference number L31167.
9. AIR LINES
Copper piping, nylon-reinforced tubing, and
flexible hoses are used to connect the units in
the pneumatic system, including air brake
system, suspension system and accessory
systems such as the entrance door, fresh air
damper cylinder, air horns, etc. Furthermore, the
nylon tubing is color coded to ease identification.
Refer to the following table for the complete
color identification code. Service instructions for
each type of air line are also provided under the
applicable headings.
Color Circuit
Red Secondary
Green Primary and Delivery
Yellow Parking Brake
Blue Suspension
Black Accessory
9.1 COPPER PIPING
A heat dissipation copper piping assembly is
used to dissipate the heat coming from the
compressor before it enters the air filter/dryer.
Connections should be checked for leakage at
least every 6,250 miles (10 000 km) or twice a