Gasboy Gilbarco Global Pumping Unit Operation Manual - Manual (Page 29)

MDE-4447A Global Pumping Unit Operation and Service Manual · May 2008 Page 25
Troubleshooting Using Gauge Readings Troubleshooting
Figure 5-5: Gauge Troubleshooting 2
At Control Valve
Cover At Strainer (or Filter)
Cover
At Control Valve
Cover
At Strainer (or Filter)
Cover
At Control Valve
Cover
At Strainer (or Filter)
Cover
Symptoms: No Flow; Nozzle Open
Probable Causes:
• Seized Meter
• Jammed Computer or Geared
Box
• Completely Restricted Nozzle or
Hose
Symptoms: Slow or No Flow; Pump
Laboring; Nozzle Open
Check Inlet Side
Probable Causes:
• Supply Line Restriction
• Stuck Foot Valve (in Tank)
• Angle Check Valve or Vertical
Check Valve
• Restricted Tank Vent
Symptoms: Slow or No Flow;
Nozzle Open
Check Outlet Side
Probable Causes:
• Control Valve not Opening Fully
• Pump Vapor Locked