Is there an adjustment screw underneath the black plastic allen wrench cap? Or is a all in one cap and screw combo?
Marshall Excelsior MEGR-253H High Capacity Excela-Flo Automatic Changeover Regulator
Question ID: 2591425 Status:
Open Jan 05, 2019 - 12:02 PM
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Jan 07, 2019 - 07:54 AM
The Allen wrench cap is an access cap. The adjuster screw is another black piece with a screwdriver slot. The access cap must always be replaced and fully threaded in after adjustment, because the center post is a mechanical stop for the internal relief valve mechanism.
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