PureFlow AirDog FP-150 - Dodge Cummins 2005-2013 - Manual (Page 24)

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PureFlow AirDog
AirDog FP-100 & FP-150 Dodge 2005 - Present
Section 9 Pressure Regulator Upgrade
Changing the Regulator Spring
The AirDog® is shipped from the factory with the fuel pressure preset.
For the 2005-2009 Dodge Cummins the AirDog® fuel outlet pressure is preset at 15 PSI
(±2). However, for some applications, you may desire to increase the pressure output from
your AirDog®. To do this, you will need to purchase and install a higher tension spring.
Regulator Spring Replacement Procedure
The regulator spring and ball assembly is located inside the Return to
Tank fuel port.
Step-1. Disconnect the ‘Return to Tank’ fuel line.
Figure 9-1 Figure 9-2 Figure 9-3
Step-2. Remove the ‘Return to Tank’ fuel line fitting exposing the regulator spring.
Step-3. Remove the ball and spring.
Figure 9-4 Figure 9-5 Figure 9-6
PureFlow
Step-4. Install the new regulator spring by reversing the steps shown in Figures 9-1 through
9-6. Be sure to place the regulator ball in the regulator seat before inserting the
spring. Properly torque the return line fitting and swivel connection when finishing.