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MDE-4334C Atlas Start-up and Service Manual · April 2008
Hydraulic/Mechanical Components
Hanging Hardware
Resetting Breakaways
To reset a breakaway, proceed as follows:
1
Close and test the shear valve. The unit may require multiple shear valve closures. Also refer
to the manufacturer’s instructions.
2
Shut off power to the unit and associated STPs. Use OSHA Lock-Out and Tag-Out
procedures.
3
Check for damage to the nozzle, especially the spout and threads.
4
If the repair or replacement is the result of a drive-off, inspect the unit for structural, meter,
and piping damage. Repair or replace damaged components, as necessary.
Note: Meters, piping, and connections may leak after a drive-off.
5
Check for damage to the breakaway valve and seals before reassembly. Follow the
manufacturer’s instructions.
6
Follow the manufacturer’s instructions for cleaning and lubricating seals and valve ends.
7
Follow the manufacturer’s instructions for recoupling.
8
Restore power to the unit and open shear valves.
9
Authorize the nozzle and check for leaks in the hose and plumbing, especially the meter and
filter.
10
Purge the system of air. See
on
11
Perform a hose continuity test. See
Testing Hose and Hanging Hardware Continuity
.
Service Tips
• Do not reuse a separated breakaway if any part appears damaged.
• Some brands of breakaways require lubrication every six months. Others require only
periodic visual inspections. Follow the manufacturer’s recommendations.
• Inspect the breakaway for leaks at least once a week or upon complaint of a leak.
• If the breakaway separates without a drive-off occurring, do not reuse. The breakaway
may be defective, having been reset excessive number of times, or have an inadequate
rating for the application. If multiple breakaways have this issue, first suspect inadequate
rating for the application.
• Consult the manufacturer for the maximum number of times you can reset a breakaway.
Some breakaways cannot be reset.
• A protective sleeve supplied by the manufacturer is recommended to avoid damage to the
dispenser and to improve appearance.