23
OPERATION AND MAINTENANCE MANUAL
QTS SERIES
Twin Screw Positive Displacement Pump
QTS-M
08
Be sure to read and understand the
Safety section
of this manual before servicing
your pump
.
De-energize the unit and lock out the mechanism.
Handle all wet parts with caution; prevent harsh contact or scratches and always
place them on a clean surface to avoid damage.
T
he preventive maintenance procedures and inspection comprises the change of the mechanical
seals, O-rings and gaskets replacement, oil change, checking the alignment of the coupling as
well as noise and vibration issues.
Removing the Rotors
1. Remove the cover nuts
(21)
and flat washers
(22), u
se a wrench or a six points socket. Remove
the front cover
(1).
2.
Take off carefully the front cover gasket (27), you may use the O-rings hook.
3. Remove the pump housing
(4)
carefully. It is fixed and centered to the back cover
(5)
guided
by dowel pins
(25).
Just pull out to slide the housing through the studs
(14). T
he pins might
come out along withthe housing or stay in the back cover. You can also remove the studs to
increase the working area. The plug
(53)
is just for sealing a hole on the housing which can be
used to lift the casing on larger models.
NOTE:
To remove the studs you may use the nut-and-locknut technique (see annex B).
27
1
22
21
Pump Dissasembly
5
14
25
4
53
54
MAI
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N
AN
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