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MDE-4334C Atlas Start-up and Service Manual · April 2008
Hydraulic/Mechanical Components
Valves
Valves
• Wear eye protection. Residual pressure and entrapped fuel may still be present
and may drain or spray while removing parts.
• Fire and explosion could result in severe injury or death.
• Test and close the shear valves involved. Shut off power to the unit.
• Remove parts slowly. Collect fuel in approved containers.
• Clean up all spills promptly.
WARNING
Flow Control Valves regulate the flow rate. Check valves at the manifold and meter help keep
the meter full of fuel. Manifold and Meter PRVs also help relieve excessive pressure due to
thermal expansion, which could damage parts or make nozzles difficult to open.
Solenoid Valves
Solenoid valves use a solenoid coil to open or close a valve. Valves of this type are either fully
open or fully closed. Servicing consists of replacing the coil, valve body, or board supplying
voltage to the valve.
Gasboy Atlas units have solenoid valves either built into the manifold, or as components in the
discharge piping line.
Atlas models 8700, 8880, 9152, 9153, 9852, and 9853 have a 1” 2-stage solenoid valve built
into the manifold. For service, refer to
All Atlas models that can have internal piping for feeding a satellite use a solenoid valve in the
discharge piping line. These models are 9140, 9840, 9850, and 9152/53 or 9852/53 with a “S”
suffix. Read this section for repair or replacement of these valves.