Gasboy Atlas Start-up - Manual (Page 186)

Page 6-66 MDE-4334D Atlas™ Start-up and Service Manual · July 2013
Hydraulic/Mechanical Components Valves
Rebuilding or Replacing
Labor cost for your area may determine your service philosophy. High labor costs favor parts
replacement. The difficult removal of a part from a unit favors a partial rebuild in the unit.
Gasboy recommends the following services for average or lower than average labor costs:
For Valves Recommended Service
Less than two years old Use a repair kit (replace spring, diaphragm, and O-rings)
More than two years old or high usage Replace the valve
To rebuild or replace a solenoid valve, proceed as follows:
1 Close and test the shear valves for dispensers.
2 Shut off power to the unit and for any involved STPs in the dispensers. Use OSHA

lockout/tagout procedures.
3 Open the nozzle into an approved container to bleed of any pressure. Some residual pressure
may remain.
4 Check the disconnected valve coils for continuity. If the coil is bad, replace the coil.
5 Replace any valves, if they are defective.
6 Use a UL-approved sealant required for fuels while replacing valves. Do not use Teflon tape.
Teflon tape debris may cause the valve to malfunction.
7 Clean the valve area. Do not introduce contamination into the valve or piping.
8 Install valves with the flow arrow in the proper direction.
Service Tips
If no magnetic field or power exists, following are the likely problems:
• Power from the valve driver board
• Cable problem
If power exists, following may be the likely problems:
• Coil
• Valve body