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Manual 1861 Rev C p/n 001861 0000
Although Tuthill Vacuum & Blower Systems pumps are well designed and manufactured, problems may occur
due to normal wear and the need for readjustment. The following chart lists symptoms that may occur along
with probable causes and remedies.
SYMPTOM
PROBABLE CAUSE
REMEDIES
Insufficient pumping
capacity
Clogged inlet filter and/or strainer
Clean or change the inlet filter and/or strainer.
Too much clearance
Check the screw “E” clearance and reset the
clearance (reset the timing gear).
Motor overload
Clogged inlet filter and/or strainer
Clean or change the inlet filter and/or strainer.
Foreign matter is caught in the
pump
Check the screw “E” clearance and reset
(reset the timing gear) if needed. If the
screws and/or casing are damaged by foreign
material, replace the screw and/or casing.
Significant increase of inlet
pressure
Check the pressure differential between the
inlet and outlet of the pump.
Interference between screws
Reset the screw “E” clearance (reset the
timing gear).
Interference between screws and
casing
Reset the “D” clearance.
Blocked discharge nozzle or piping
and increased backpressure
Drain and clean the discharge nozzle and
piping.
TROUBLESHOOTING
09