OMI.EN-PCP001 R01 (Funct. and Maint.Manual n.03 – Fourth edition) Pag.18
The male shaft bearings are greased at NOVA ROTORS™ . In case they were removed,
their seat shall be filled with grease according to the table above.
8.4.3 Propeller shaft joints
Pin joints with sleeve are to be periodically lubricated.
Moreover, every time parts were replaced with original spare parts, their grease shall be
replaced.
IMPORTANT: The pumps that uses sleeves over joints for food are supplied with
food-compatible grease.
8.4.4 Motor variator See Service Manual
8.5 Malfunctioning
Below you can find a synthetic table. Malfunctioning References:
A The pump does not work F The pump stops
B
The pump does not
intake
G Faulty stator
C Wrong delivery
H Faulty rotor
D Uneven flow
I The seal leaks
E Noisy pump
J
Low delivery
pressure
A
B
C
D
E
F
G
H
I
J POSSIBLE CAUSE
1
X
X
New stator and rotor are stuck together
2
X
X
Faulty electrical contact
3
X
X
X
X
X
Excessive delivery pressure
4
X
X
X
X
Unknown matter in the pump
5
X
X
X
X
X
High temperature, the stator squeezed
6
X
X
X
Stator of wrong material. Check the order
7
X
X
X
X
X
Product granulometry too high.
8
X
X
X
X
X
X
X The product sediments when the pump is
stopped
9
X
X
X
Air leakage at intake
10
X
X
X
X
Difficult intake
11
X
X
X
X
Air intake from seal or packing
12
X
X
X
X Too Low speed
13
X
X
X
X
Wrong direction of rotation
14
X
X
X Available NPSH below required
15
X
X
X
X
X
X The pump is working dry
16
X
X
X The stator is faulty – burned-over
17
X
X
X
X
X Spoilt stator. Check rubber
18
X
X
X
X
X Faulty rotor
19
X
X
X
X
Faulty connecting rod
20
X
X
The pump is not aligned to the elastic joint
21
X
X
Broken connecting rod
22
X
X
Spoilt bearings
23
X
X
X
Too high speed
24 X
X
X
X
X Excessive viscosity
25
X
X
X
X
X
X
X The gland needs to be adjusted
26
X
X
X Inadequate sealing system
