Major 1150 Slurry Vac, Operator'S Manual & Parts List

Page: 39 / 89

35 www.major-equipment.com
Maintenance Inspections, Checks, Repairs and Technical Details
Warning:
When carrying out maintenance operations, inspections, checks or repairs it is advisable to wear the individual protective
devices listed in this manual.
All maintenance operations, inspections, checks and repairs must be carried out with the greatest care and with the
Rotary blades vacuum pump off and the P.T.O. disconnected.
Cleaning the Pump:
If slurry enters the Rotary blades vacuum pump, the inside of the body must be washed immediately, by making it suck
in diesel or fuel oil through the discharge elbow with the Rotary blades vacuum pump in compression phase. After this
operation make it suck in oil. The same operation should be carried out when the Rotary blades vacuum pump has
to remain inactive for a long time. In this case, disconnect the suction and delivery tube connected to the valves and
hermetically seal the manifold cover because the gasses that form inside the tank would pass into the Rotary blades
vacuum pump and cause the inside of the body to rust and this in turn could cause the blades to break when the system
is re-started. In order to avoid rust formation, do not use water. If the body is washed after it is disassembled, it is
advisable to carry out a preliminary wash with detergents (e.g. thinners) before carrying out the above operation.
Wash the oil tank at least once a year. Remove the manifold, and then wash it using solvents.
Wash and clean the valves at least once a month. Remove the valves, then wash them with water or, if necessary, non-
corrosive detergents.
Checking the Valves: Regularly check that all the valves, for both overflow and pressure/vacuum, are still working
efficiently.
Blade Information
Three material type of blades are fitted on Rotary blades vacuum pump. The following Tabella 8 describes what kind
of material is fitted for each series.
Standard blades are suitable for no-strong uses, for short and not frequent periods. Special blades are made of a
special material suitable for strong uses and for Rotary blades vacuum pump used in agricultural field.
These blades offer an excellent resistance to wear and mechanical and thermical stress. These are suitable for more
frequent uses and to suck thick sewages. They are recommended for installation with frequent uses even during the
same day.
Apart from normal wear, it may be necessary to replace the blades following incorrect use of the Rotary blades vacuum
pump. The most frequent causes come from heat, lack of lubrication, entrance of sewage, high pressure or vacuum,
formation of rust inside the body due to prolonged inactivity.
With the heat too high pallets stretch to touch the plate front and rear, this causes the breakdown of the pallets.Lack of
lubrication means the blades are completely dry like the inside of the pump. This increases their fragility and causes
them to break lengthways. The same type of breakage can be caused by entrance of sewage or by a too high working
pressure. A too high vacuum causes the blades to beat against the cylinder with consequent damage to the outside of
the blades. Moreover, the lining becomes wavy.