LEYBOLD 970100V, Original Instruction Manual

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SV Neo D 16 – 25 - 40 – 65 Jan. 2018 42 / 51
5.4.E Checking the float valve
Tools required : Allen Key 6 mm
If the pressure does not fall below approx. 5 mbar during pump operation,
check the tightness of the float valve.
Remove the exhaust filter with the exhaust flange.
Remove the float valve screw and pull the float valve assembly out of the float
chamber.
Take off the gasket.
Clean the nozzle. Check the tightness of the float valve.
Check all gaskets and replace them with new ones if necessary.
Reassemble the float valve in the reverse sequence.
Depending on the process involved, dangerous substances may escape from
the pump and oil. Take the appropriate precautions.
Never mount used seals; always mount new seals.
Warning
Caution
5.4.F Cleaning the intake port dirt trap and Checking the anti suck back valve
Cleaning the intake port dirt trap
Tools required : open-jaw or box wrench 13 mm. Allen key 6 mm
A dirt trap for coarse particles is located in the intake flange of the pump. It
shall be kept clean to avoid reduction of the pumping speed.
The dirt trap consists of a wire-mesh screen.
Disassemble the intake hose or pipe.
Take out the wire-mesh screen and clean them using a suitable solvent.
Reassemble in the reverse sequence.
Depending on the process involved, dangerous substances may escape from
the pump and oil. Take the appropriate precautions.
Never mount used seals; always mount new seals.
Warning
Maintenance