Vac Motor Brushes Check brushes; replace if needed.
Check hose for blockage.
Check gauge; replace if needed.
Tank is full; empty tank.
Make sure discharge valve is closed.
Air leakage; check gaskets and loose connections.
Reset vacuum relief to 13" Hg or replace.
Check hose for blockage.
Check for a build up of fines in tank bottom; clean if necessary.
Check that cap is on suction port.
Air leakage; check gaskets and loose connections.
Float Control Check float control; clean or replace.
Excessive Foaming
Consult coolant supplier.
Tank Turbulence Check to see if air is being sucked in the discharge.
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