Setting the pace since 1953
Insufficient lubricating oil
circulation (for versions
with automatic lubrication)
The PTO does not rotate
No suction / no compression
Locking of handle
11 - MAINTENANCE, INSPECTIONS AND CHECKS, REPAIRS, TECHNICAL
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.
Suction of air from the fittings
Lubrication tube badly inserted
in pipe fittings
Air in oil pump chamber
Broken blades
Foreign body in rotary blades
vacuum pump
Handle incorrectly positioned
Reversing gear incorrectly
positioned
Rotary blades vacuum pump
rotates in wrong direction
All blades jammed
Blades protrude from the rotor
slots anomalously
Rubber ball closes overflow
valve
Foreign liquid in filling pump
Non-use
ASSISTANCE
Replace the fittings
Insert lubrication tube correctly
Fill pump chamber with oil
Replace blades (check if rotor pin is bent)
Remove foreign body
Position handle correctly
Position reversing gear correctly
Reverse direction of rotation
Disassemble rotary blades vacuum pump,
clean and wash blades, rotor and body
Disassemble rotary blades vacuum pump,
clean and wash blades, rotor and body
Increase passage of air inside valve
Remove and clean with diesel oil
Lift handle with a lever
page 41