• 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
MDE-4334C Atlas Start-up and Service Manual · April 2008
Page 7-43
Hanging Hardware
Hydraulic/Mechanical Components
To replace a hose, proceed as follows:
1
On dispensers, close the shear valve (see
on
). Check for proper shear
valve operation. Units may require multiple shear valve closures.
2
Shut off power to the unit and associated STPs. Multiple STP disconnects may be required.
Use OSHA Lock-Out and Tag-Out procedures.
3
Drain the nozzle and hose into an approved container.
4
Remove the nozzle, swivel, whip hose, and breakaway first and then, the hose clamp.
5
Remove the hose.
Wear eye protection as residual pressure may exist in the hose during disassembly
and may cause fuel spray.
WARNING
6
Use a UL-approved pipe sealant on hose coupling with NPT threads. Follow all these
recommendations:
• Ensure that you follow the manufacturer’s instructions for installation and proper torque.
• Do not use Teflon tape. Teflon tape on these components can cause damage during
assembly or installation and defeat the conductive property of the hanging hardware and
cause nozzles to malfunction.
• Do not apply sealant to the first two threads of any hose coupling.
• Do not use sealant on hose end couplings using O-Ring seals, such as those found with
coaxial vapor recovery hoses (a light coating of silicone grease is advised to allow the
O-Rings to seat and seal properly).
• Assemble the clamp to the hose to ensure proper retrieval and minimum trip hazard, then
the hose to the breakaway, then to the whip hose and swivel, and finally to the nozzle.
Always attach the hose assembly by rotating the hose and coupling. Screw the coupling in
securely. Do not overtighten.
Note: Install padded or contoured plastic hose clamps and retractor cables properly. In all
instances, do not install hose retractor clamps downstream of the breakaway.