Dover Wayne Helix WM048523 - Page 8

18411 Suction Pumps .........................................................................................................
18411.1 Compact Pumping Unit ................................................................................
18511.2 By-pass (Relief) Valve Assembly .................................................................
18611.3 Float and Valve Seat Assembly ....................................................................
18611.4 Air Separation ...............................................................................................
18611.5 Testing the Suction Pumping System ...........................................................
18711.5.1 Vacuum Test ............................................................................................................
18811.5.2 Pressure Test ...........................................................................................................
18811.5.3 Adjusting the By-pass Pressure ..............................................................................
18911.6 Suction Pump Motors ...................................................................................
18911.7 Troubleshooting ............................................................................................
19011.8 Repair ...........................................................................................................
19011.8.1 Lapping the Pressure Relief Valve ..........................................................................
19111.8.2 Lapping the Pressure Relief Poppet Stem ..............................................................
19211.8.3 Strainer ....................................................................................................................
19311.8.4 Rebuilding the Pumping Unit ...................................................................................
19311.8.5 Replacing the Lip Seal .............................................................................................
19612 Small Pump 2000 Model Series ...............................................................................
19712.1 Sales/Vol and Unit Price Displays ................................................................
19812.2 Lower Electronics Enclosure (LEE) ..............................................................
20113 Meter Calibration Procedure .....................................................................................
20113.1 NA Procedures .............................................................................................
20413.2 IEC Procedures ............................................................................................
20514 Models with Metal Electronic Head - IEC .................................................................
20614.1 Bezel Components .......................................................................................
20714.2 Removing the Bezel .....................................................................................
21114.3 Replacement Procedures .............................................................................
21114.3.1 Display Glass and Speakers ...................................................................................
21514.3.2 VGA Display or Backlight ........................................................................................
22514.3.3 VGA Softkeys and Preset Keypad ...........................................................................
23014.3.4 Sales Volume Display ..............................................................................................
23114.3.5 R2 Board .................................................................................................................
23314.3.6 Secure Door Board ..................................................................................................
23414.3.7 VGA Backlight Driver Board ....................................................................................
23514.3.8 Fan ..........................................................................................................................
23514.3.9 EMT Totalizers .........................................................................................................
23714.4 Removing the Lower Covers and Vapor Vents .............................................
24115 Helix 6000 DEF, Extra Narrow Model Dispensers - IEC ...........................................
24915.1 Heater and Tank Replacement .....................................................................
25515.2 Pump Replacement ......................................................................................
25615.3 Motor Replacement ......................................................................................
4 WM048523 Rev 08 01/2019
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