14
FIGURE 13 - SC-PR
™
SINGLE CHECK PROTECTION VALVE INSTALLED IN MULTI-COMPARTMENT RESERVOIR
FRONT AXLE COMPARTMENT
REAR AXLE RESERVOIR
SC-PR
™
VALVE
SUPPLY COMPARTMENT
GOVERNOR
COMPRESSOR
FIGURE 11 - AIR SYSTEM WITHOUT AD-SP
™
SYSTEM PURGE AIR DRYER
FIGURE 12 - AIR SYSTEM WITH AD-SP
™
SYSTEM PURGE AIR DRYER
3. Locate an unused port in both the supply compartment
and front axle compartment of the multiple compartment
reservoir. Install the SC-PR
™
valve in the front axle
reservoir (or compartment). Connect the supply port of
the SC-PR
™
valve to either an unused port in the supply
compartment of the reservoir OR Tee into the line between
the AD-SP
™
air dryer and the supply compartment of
the reservoir. Note: Use 3/8" air brake tubing. Refer to
Figure 13.
CONNECTING THE AIR LINES
Important General Instructions
The instructions that follow apply to all installations of the
AD-SP
™
air dryer regardless of whether the AD-SP
™
air
dryer is replacing an existing air dryer or is being installed
on a vehicle that never had one installed.
If the vehicle is currently equipped with an air dryer some
additional considerations apply.
A. If the AD-SP
™
air dryer is replacing an integral purge air
dryer, such as the Bendix
®
AD-9
™
air dryer, on a vehicle
equipped with any compressor except the Cummins-
Holset type E & QE, all that is necessary is that the air
dryer be removed and the existing air lines be correctly
connected to the AD-SP
™
air dryer.
FRONT AXLE RESERVOIR
GOVERNOR
GOVERNOR
REAR AXLE SERVICE
COMPRESSOR
FRONT AXLE SERVICE
REAR AXLE RESERVOIR
SUPPLY RESERVOIR
COMPRESSOR
AD-SP
™
AIR
DRYER
SUPPLY
FRONT AXLE SERVICE RESERVOIR
SINGLE CHECK VALVE
SC-PR
™
VALVE
INTERNAL SINGLE CHECK VALVE