Page 7-44
MDE-4334C Atlas Start-up and Service Manual · April 2008
Hydraulic/Mechanical Components
Hanging Hardware
7
Check the hose hanging hardware for continuity. See
Testing Hose and Hanging Hardware
. Replace any components, if necessary.
8
Restore power to the unit. Open the shear valve for dispensers.
9
Check for leaks.
10
Bleed system of air. See
for more information.
11
Check for leaks again.
Flow Restrictors
Flow restrictors are devices used for pumps and dispensers to reduce flow rates. Commonly,
they are used for vapor recovery applications and to limit the maximum flow to 10 gpm, as per
certain US national regulations. They are commonly used as a separate device attached
between the hose outlet casting and hose. See the manufacturer's installation and service
information for more details.
Breakaway Valves
Emergency breakaway couplings help protect against fuel spill, fire hazard, and equipment
damage. The breakaway valve stops significant fuel drainage from the dispenser during drive-
offs, if the nozzle or hose loop catches on the vehicle. Always use UL-listed breakaways.
• For proper operation of the breakaway, always bolt the dispenser or pump securely to the
island. See Gasboy Atlas installation instructions for pumps and dispensers.
• Some breakaway manufacturer’s require testing of dispensers or pumps for pull strength
before installing the device. Follow the manufacturer’s instructions.
• A hose retriever clamp must never be installed between the breakaway and the nozzle
• When installing a breakaway, always use a wrench on breakaway hex or wrench flats
only.
• Always use a UL-approved pipe sealant suitable for the fuel involved for connections,
except on the O-Ring fittings. Never use Teflon tape.
• Some breakaways are reusable. Follow the breakaway manufacturer’s instructions for
inspection and reuse.
Note: Do no reuse resettable breakaways beyond the number of allowed resets listed by
the manufacturer.
• Periodically and after all drive-off occurrences, check breakaway hoses and couplings for
hose continuity. See
Testing Hose and Hanging Hardware Continuity
on
.