Replacing The Check Valve Assembly; Figure 21. Maxxum Check Valve Assembly - Veeder-Root Red Jacket Maxxum Big-Flo Quick-Set Series Installation, Operation & Service Manual

Service and Repair

Replacing the Check Valve Assembly

WARNING
When servicing equipment, use non-sparking tools and use caution when removing or installing
equipment to avoid generating a spark.
Close the ball valve in the discharge line if it has been installed.
WARNING
Care should be taken to ensure that the internal portions of the vent line and check
valve assembly are clean and free of debris or contamination during servicing.
1. Relieve system pressure by removing the protective cover and then backing out the pressure adjustment
screw (see Figure 21).
2. Disassembly
a. Loosen or disconnect the lower vent line fitting.
b. Disconnect the upper vent line fitting.
c. Remove the four 1/2 inch hex bolts.
d. Pull the check valve housing assembly straight out of the manifold.
Protective
cover
Pressure
adjustment
screw
Thread
protector
Vent line
rj/051-301-23.eps
OFF Disconnect, lock out, and tag power at the panel before servicing the
pump.

Figure 21. Maxxum Check Valve Assembly

1/2-13 Hex bolt
O-ring
33
Replacing the Check Valve Assembly
Check valve