PureFlow AirDog®
AirDog® II DF-100, DF-165, & DF-200 2001-2010 Duramax Diesel
Section 11 Pressure Regulator Adjustment
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AirDog®II AND AirDog®II-4G ADJUSTABLE FUEL PRESSURE REGULATOR
The AirDog®II-4G rises to a new level of performance with an adjustable fuel pressure regulator
machined from stainless steel with a double O-ring seal system and a soft seat piston.
PRESSURE ADJUSTMENT FOR THE DURAMAX DIESEL
Turn the adjuster screw counter-clockwise to reduce the output pressure
or clockwise to increase the pressure. Be sure to re-torque the jam nut after adjusting the
regulator.
IT IS STRONGLY RECOMMENDED TO ADJUST THE PRESSURE WHILE USING A FUEL
PRESSURE GAUGE. TOO MUCH OR TOO LITTLE PRESSURE MAY CAUSE DAMAGE TO THE
INJECTION SYSTEM!
INSPECTING THE REGULATOR SEALS AND CHANGING THE REGULATOR SPRINGS
Step 1.
Remove the regulator by turning the Adjustment Screw counter-clockwise
using a 3/4 wrench.
Step 2.
After removing the regulator assembly, remove the springs and conical
plunger. Inspect the O-rings on the Valve Adjuster and Regulator plunger for any
nicks or tears. Replace any damaged O-rings at this time.
New O-rings are
included in the Customer Service O-ring Kit (901-05-0100) if replacements are
required.
Step 3.
Re-install the Regulator Plunger and Regulator Springs the same order
in which they were removed.
Step 4.
Tighten the Adjustment Screw to proper torque. Use a pressure
sensor to set the desired pressure per above.
Loosen the Jam Nut with a 9/16 wrench
Re-torque after adjustment
Use a flathead screwdriver to adjust the
pressure regulator
PRESSURE
ADJUSTMENT
+
-
PRE-SET AT 8-10PSI
FROM FACTORY
