Inhaltsverzeichnis
Verfügbare Sprachen
Verfügbare Sprachen
istr_MXV25 01_2010
10-12-2009
9.2. Replacing the ball bearing
If the ball bearing (66.00) has to be replaced, use a 2Z C3-type,
of the size marked on the ball bearing to be replaced and
containing grease lubricant suitable for the operating temperature.
The size of the bearing depends on the size of the motor:
motor size
80
90
100-112
132
9.3. Bearing in the second stage and intermediate bearing
The MXV.. 25-2, 32-4, 40-8 pumps have a bearing sleeve (64.10)
on the shaft (64.00) and a bearing in the stage casing (25.03) be-
hind the second impeller (according to the order of suction).
Starting with the MXV.. 25-212, MXV.. 32-412 and MXV.. 40-811 units,
there are also une or two intermediate bearings (see section 12.1.).
If they are to be dismantled, first number the position of each
stage casing and the single spacer sleeves (see lengths and
positions of sleeves in section 12.1.) so as to be able to re-
mount the components correctly.
10. Remounting
To remount the components follow the dismantling procedure in
inverse order (see section 9.).
When inserting the shaft (64.00) with the internal parts of the
pump into the external jacket (14.02), make sure that the first
stage casing (25.01) in the suction casing (16.00) and the stage
casing with bearing (25.03) in the first stage casing (25.01) are
correctly inserted.
Check the state of the o-rings (14.20) and replace them of they
are damaged. Make sure that the o-rings (14.20) are correctly in-
serted on their seats on the pump casing (14.00) and upper cover
(34.02). Lubricate the seal rings with clean water or any other com-
patible lubricant.
10.1. Tightening torque
impeller
nuts (28.04)
8 Nm
MXV 25-2
MXV 32-4
MXV 40-8
99.00
70.18
70.19
32.30
32.31
32.32
32.00
34.02
14.06
14.04
36.00
36.52
64.00
64.15
64.19
64.10
13.60
22.12
28.08
28.04
14.20
61.00
8:23
Pagina 9
ball bearing
6206, 2Z, C3
6207, 2Z, C3
6208, 2Z, C3
6310, 2Z, C3
nuts (61.04)
screws (64.25)
screws (70.18)
on tie-bolts
in the coupling with nuts (70.19)
50 Nm
22 Nm
40 Nm
66.18
66.00
64.22
64.25
61.04
14.20
20.00
25.05
36.51
61.02
14.02
28.00
25.02
25.03
25.01
14.54
16.00
34.01
14.12
3.93.029
When tightening the nuts (28.04), be careful not to scratch
the shaft with the second wrench used on the opposite side.
ATTENTION: the nuts (61.04) on the tie-bolts (61.02) and the screws
(70.18) with the nuts (70.19) on the lantern bracket must be uniformly
tightened with alternated crossover tightening procedure in diametri-
cally opposite positions.
(
*
Fig. 6a
Rotor rested, with shaft not
locked in the coupling.
(
) Pin for raising the shaft.
*
10.2. Axial position of the pump rotor
In the vertical position and from the resting position (fig.6a),
raise the rotor, levering on a pin inserted in the hole in the shaft,
until the pin can be rested under the coupling (64.22).
In this position (fig. 6b), by tightening the screws (64.25) uni-
formly, the shaft (64.00) is locked tight in the coupling.
Remove the pin.
Mount the motor as indicated in section 4.
11. Spare parts
When ordering spare parts please quote their designation, position
number in the cross section drawing (section 12.) and rated
data from the pump name plate (type, date and serial number).
Any pumps that require inspection/repair must be
drained and carefully cleaned inside and outside
before dispatch/submission.
12. Cross section drawing and designation of parts
Nr.
13.60
14.02
14.04
14.06
14.12
14.16
14.17
14.18
14.19
14.20
14.54
66.18
16.00
20.00
(3)
66.19
22.12
25.01
66.00
25.02
(2)
25.03
25.05
28.00
28.04
28.08
32.00
32.30
32.31
32.32
34.01
34.02
36.00
36.51
36.52
61.00
61.02
61.04
64.00
64.10
64.15
(2)
64.19
64.22
64.25
66.00
14.12
66.18
66.19
14.16
70.18
(1)
70.19
14.17
99.00
14.18
(1) Inserted in the stage casing (cannot be supplied separately)
(2) See section 12.1.
14.19
(3) Only for motor size 132
64.22
)
64.25
64.00
L2
Fig. 6b
Rotor raised, position for locking
the shaft in the coupling.
Designation
Flange with adapter
External jacket
Plug
O-ring
Plug
O-ring
Screw
O-ring
O-ring
O-ring
Wear ring (1)
Suction casing
Delivery casing
O-ring, suction side
First stage casing
Stage casing
Stage casing with bearing
Last stage casing
Impeller
Impeller nut
Washer
Lantern bracket
Guard
Washer
Screw
Lower cover
Upper cover
Mechanical seal
Retaining ring, split
Shoulder ring
Base
Tie-bolt
Nut
Shaft
Bearing sleeve
Spacer sleeve
Spacer sleeve, bearing stage
Coupling
Screw
Ball bearing
Circlip
Shoulder ring (3)
Screw
Nut
Motor, complete
Changes reserved.
3.93.019
9
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