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Revision: 0
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Copyright © 2015, Weir Minerals Australia Ltd. All rights reserved.
Page 7-37
Issue Date: 23 February 2015
HYDRAU-FLO
®
Maintenance
7.2
Troubleshooting Guide
Table 7-1: Troubleshooting Guide
Symptoms
Causes
Remedies
Fuel nozzle shutting off
prematurely
Nozzle or receiver spring setting too
low
Check condition & rating of spring.
Relace if necessary.
Back pressure in filler pipe too high.
Ensure no excessive restriction in flow
of fuel from the Hydrau-Flo
®
system to
the tank.
Breather blocked.
Check & clean. Replace it necessary
Float valve set too low in tank.
Adjust to desired fill height
Restriction in pilot line.
Check line for damage, crushes or
kinks. Replace if necessary.
Fuel nozzle not shutting off
Float valve not stopping bleeding from
pilot line.
Check the operation of the float
ensuring it does not hit internal walls of
fuel tank. Check valve seats for
damage or obstruction.
Piston stuck open.
Check piston operation is free.
Leakage in pilot line
Check and replace if necessary
Float level set above breather height.
Lower float level below the height of
breather.
Dislodged Welsch plugs in fuel filling
valve or float control valve
Visually check valves and confirm
Welsch plugs are fitted securely
Fuel weeping from breather after
the tank has been filled
Float level set too high, not allowing
enough air space for fuel expansion
due to rise in temperature.
Lower float level setting.
