Repair
Repair
Repairing the Main Air Regulator
NOTE: Repair parts are available in Kit 17C131 (EQ600) or Kit 17C129 (EQ300).
1.Perform Pressure Relief Procedure, page 8 .
2.Make sure all of the air pressure is relieved in the unit. Remove the water separator filter for access to the piston cover and return spring.
3.Use a crescent wrench that can open to 2 in. (5 cm) to unscrew the piston cover.
NOTE: There is a spring inside this cover.
4.Unscrew the diaphragm cover for access to the diaphragm and to the end of the piston shaft.
5.Remove the diaphragm and inspect for any cracks or tears. Replace the diaphragm if necessary.
6.Carefully remove the spring and piston assembly, then clean out any debris in the body of the regulator.
7.Push the piston shaft and remove the piston from the opposite end of the regulator housing.
8.Inspect the piston for any foreign matter that may have been the cause for the piston to stay open.
9.Inspect for any damage to the piston shaft where it interacts with the diaphragm cup.
NOTE: Excessive wear here indicates the main check valve is not sealing. Contact your distributor if this happens.
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