MDE-4334C Atlas Start-up and Service Manual · April 2008
Page 7-47
Hanging Hardware
Hydraulic/Mechanical Components
Testing Hose and Hanging Hardware Continuity
Perform an electrical continuity check when installing hoses after a drive-off, and for periodic
preventive maintenance. The STP check valve or pump regulating valve must maintain the
operating pressure to perform this test. The following procedure tests the continuity of the
hanging hardware (that is, hose, nozzle, swivel, breakaway, and hose casting).
Note: Testing of an un-pressurized hose may lead to false conclusions in determining if a
defect exists or not.
Read and follow all hazardous zones requirements.
You are working in a potentially dangerous environment of flammable fuels/
vapors. Fuel and its vapors may ignite, leading to serious injury or death.
Fire, explosion, or electrical shock could result in severe injury or death if you do
not follow safety procedures.
Ensure that you correct any safety hazards and barricade the area.
Follow the manufacturer’s instructions for the safe use, operation, and
maintenance of the testing equipment.
Use only a low voltage digital Ohmmeter. Do not turn the tester On until after the
connections are made. Turn the tester Off before disconnecting test clips. Do not
test continuity if there is spilled fuel, leaking components, or fuel vapors present in
the area.
Hanging hardware without the proper electrical continuity rating presents a risk of
igniting fuel vapors.
Injuries or death may result if hose continuity is not maintained.
Use approved procedures to test for hanging hardware continuity. Refer to PEI/
RP400-02 in addition to the equipment and component manufacturer’s instructions
for additional information.
WARNING
To test the hose and hanging hardware continuity, proceed as follows:
1
Ensure that there is no liquid fuel or flammable vapor present. Clean up, as necessary.
2
Lift the nozzle hook and authorize the unit to pressurize the hose.
3
Lower the nozzle hook, shutting the unit off.