AA01A.C01
Service instruction POP-I
Page 5/7
Executed by: AJ/CML
Issued on: 01. March 1997
Accepted by: SL/TM
Rev. date: 12 March 2021
Operation
The mixers have thermal sensors as standard equipment. Often the mixers are exposed to extremely difficult
operation conditions. Therefore, it is important to connect the thermal control. Burning of the motor due to
overheating can thus be avoided. If the safety function has been activated the mixer must not be restarted until
the cause of the disconnection has been found. Among other things the disconnection can be caused by
reduced mains voltage, a propeller blockage or an overheated motor. The cooling period for overheated motors
can be up to 1 hour.
The unit must not operate above liquid level.
Capacity
The capacity of the mixer will always depend on the consistency of the medium, but especially on the design of
the tank.
Inspection
Regular inspection will ensure the mixer a long life at low costs. The oil must be changed every 6 months/4,300
hours of operation for POP-I 150 rpm and every 6 months/2000 operating hours for POP-I 300 rpm, however,
min. once a year and under difficult operation conditions more often than every 6 months.
At inspection, the outer wear bush, pos. C, must be checked. There are two different kinds of the outer wear
bush: a wear bush made of stainless steel and a type designed for extremely wearing mediums. This is a
stainless-steel wear bush, covered with a ceramic material. The ceramic coated type is characterized by its dark
colour on the wearing surface
.
With stainless steel wear bush
If the wear bush has deep wear traces, the propeller must be removed. A spacer, pos. H, can be installed
between the interior wear bush, pos. D, and the propeller in order to move the wear area for the exterior oil
sealing ring, pos. G. If it is impossible to move the wear area, either because it has been moved previously, or
the wear area is too wide, a new wear bush must be installed.
With ceramic coated wear bush
In this case, remove the propeller and check if the surface on the wear bush is mat/porous. If this is the case,
the wear bush, pos. C, is worn and must be changed. It is very important to check the oil sealing ring, pos. G,
for wear with this system.
When the propeller is removed, check the interior wear bush, pos. D, for wear traces. This wear bush can be
turned once for a new wear area. The oil sealing rings, pos. F and G, (incl. of springs) must be checked for wear
and changed if necessary.
A. Grease chamber
B. Grease nipple
C. Outer wear bush
D. Inner wear bush
E. Grease chamber
F. Oil seal rings
G. Outer oil sealing ring
H. Support disc
Summary of Contents for POP-1
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