Gasboy Gilbarco Global Pumping Unit Operation Manual - Manual (Page 30)

Troubleshooting Troubleshooting Using Gauge Readings
Page 26 MDE-4447A Global Pumping Unit Operation and Service Manual · May 2008
Figure 5-6: Gauge Troubleshooting 3
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 or Slow
Delivery; Nozzle Open
Probable Causes:
• Worn Bypass Valve or Rotor
Blades
• Worn Rotor or Stator
• Air Leak in Suction Pipe
• Dirty Filter
Symptoms: Slow Flow; Nozzle
Open
Check Outlet Side
Probable Causes:
• Partially Restricted Nozzle or
Hose
• Bind in Computer, Gear Box,
Meter
• Pulser Drive Linkage
Symptoms: No Flow or Slow
Delivery; Nozzle Open
Probable Cause:
• Tank Burial Too Deep (High Lift)