Wayne Vista Series, Service, Page: 37 / 166

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November 1992 Part No. 917543 Rev. A
5. HYDRAULIC PARTS
The following section describes the operation of those hydraulic parts in Wayne dispensers
which perform some “act”. Simple flow tubes will not be discussed.
There are three basic hydraulic parts (four in blending dispensers) in Wayne dispensers as fol-
lows:
• Strainer and Filter
• Flow Control Valve
• Meter
• Blend Valve (Blenders only)
5.1. STRAINER AND FILTER
The strainer and filter are mentioned in this document only because they may cause the
dispenser to deliver slowly. In some cases this may appear to be a service problem. In
reality the filter should be changed and the strainer cleaned on a regular basis.
Before removing the strainer or filter assembly, trip the impact valve and turn OFF the
circuit breaker for the associated submersible pump.
5.1.1. Strainer
If the underground installation is a new one, it may be necessary to clean the
strainer screen two or three times the first few days of operation to remove
debris and pipe dope. After this, occasional cleaning of the strainer is all that
should be required. The fuel filter should be changed whenever the strainer is
cleaned.
The strainer is removed for cleaning by unfastening the cap. Place a container
under the cap to catch the product and sediment. Wash the screen in gasoline
and dislodge lint and other foreign particles with compressed air. Check for
leakage after reinstalling.
5.1.2. Filter
Like the strainer in new installations it may be necessary to change the filter
frequently in the first few days of operation in order to ensure proper opera-
tion.
The fuel filter is removed by unscrewing it (the same way an oil filter is
removed from a car engine). Place a container under the filter to catch the
fuel. To install the new filter, first apply a film of oil to the gasket and hand
turn until gasket contacts base. Then tighten one half turn. Open the emer-
gency shear valve, turn the submersible circuit breaker ON and check for
leaks.