Liquid Controls Optical Air Eliminator US Patent 7000628 Refined Fuels Applications A8981 & A8981A - Manual (Page 12)

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Maintenance
Disassembling
Step 4
Place the valve body on a flat surface. Using a flat blade
screwdriver, remove the two screws which hold the armature
guide post and valve body together. Lift the armature guide
post off of the valve body. The internal components consist
of a plunger and a spring. Inspect the spring for damage.
O-rings
O-rings
Step 5
The armature guide post is composed of four components:
two O-rings, the guide post, and the flange. Inspect these
components for damage.
Step 6
The valve body has two O-rings found on the face which
faces the housing. These two O-rings are identical. Inspect
these for damage. Inspect the ports for blockage.