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11 - MAINTENANCE, INSPECTIONS AND CHECKS, REPAIRS,
When carrying out maintenance operations, inspections, checks or repairs it is advisable to wear the individual
protective devices listed in this manual.
If the tank has not been used for a long time, ensure the PTO shaft turns freely and rinse the pump with 200 ml of
diesel fuel. After this it is important to operate the pump with regulator valve completely open for 20 sec. (forced
lubrication version) or introduce into the pump approximately 100 ml of oil from the discharge bend (automatic
lubrication version) with the compression pump. This will ensure good lubrication of the blades before working
with the liquids. The final step is to adjust the valve for correct operation.
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.
11.1. CLEANING
11.1.1 WASHING OF THE BODY
If sewage 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.
11.1.2 WASHING OF OIL TANK
Wash the oil tank at least once a year. Remove the manifold, and then wash it using solvents.
11.1.3 WASHING AND CLEANING OF VALVES
Wash and clean the valves at least once a month. Remove the valves, then wash them with water or, if necessary, non-corrosive
detergents.
11.2
CHECKING OF VALVES
Regularly check that all the valves, for both overflow and pressure/vacuum, are still working efficiently.
11.3
INSPECTION AND REPLACEMENT OF THE BLADES
11.3.1 "LONG LIFE" BLADES GENERAL INFORMATION
The LONG LIFE blades are made from a special material suitable for industrial uses for rotary blades vacuum pumps used in the
agricultural field. These blades offer excellent resistance against wear and thermal and mechanical stress. It is suitable for the most
common uses and for the suction of denser sewage. It is recommended for systems used by contractors and also for frequent and
repeated uses 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.
TECHNICAL ASSISTANCE
user and maintenance
instruction manual BALLAST series
p. 55
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