CALPEDA MXV 32-408/C [9/80] Remounting
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CALPEDA MXV 32-408/C [9/80] Remounting

CALPEDA MXV 25-208/C [9/80] Remounting
9
.2. Replacing the ball bearing
I
f 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:
m
otor size ball bearing
80 6206, 2Z, C3
90 6207, 2Z, C3
100-112 6208, 2Z, C3
132 6310, 2Z, C3
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
i
nverse order (see
s
ection 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 (61.04)
screws (64.25) screws (70.18)
nuts (28.04) on tie-bolts in the coupling
with nuts (70.19)
8 Nm 50 Nm 22 Nm 40 Nm
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.
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.
L2
3
.93.019
(
*
)
64.00
64.25
6
4.22
F
ig. 6a
Rotor rested, with shaft not
l
ocked in the coupling.
(
*
) Pin for raising the shaft.
F
ig. 6b
Rotor raised, position for locking
t
he shaft in the coupling.
9
Changes reserved.
Nr. Designation
13.60
Flange with adapter
14.02 External jacket
14.04 Plug
14.06 O-ring
14.12 Plug
14.16
O-ring
14.17 Screw
14.18
O-ring
14.19
O-ring
14.20 O-ring
14.54
Wear ring (1)
16.00
Suction casing
20.00 Delivery casing
22.12
O-ring, suction side
25.01
First stage casing
25.02 Stage casing
25.03
Stage casing with bearing
25.05
Last stage casing
28.00 Impeller
28.04
Impeller nut
28.08
W
asher
32.00 Lantern bracket
32.30
Guard
32.31
Washer
32.32 Screw
34.01
Lower cover
34.02
Upper cover
36.00 Mechanical seal
36.51
Retaining ring, split
36.52
Shoulder ring
61.00
Base
61.02 Tie-bolt
61.04
Nut
64.00
Shaft
64.10
Bearing sleeve
64.15
Spacer sleeve
64.19
Spacer sleeve, bearing stage
64.22 Coupling
64.25
Screw
66.00
Ball bearing
66.18 Circlip
66.19
Shoulder ring (3)
70.18
Screw
70.19 Nut
99.00
Motor
, complete
(1)
Inserted in the stage casing
(cannot be supplied separately)
(2) See section 12.1.
(3) Only for motor size 132
(1)
14.16
14.19
14.18
14.17
66.18
99.00
70.18
70.19
(3)
66.18
66.19
66.00
28.04
14.02
61.00
14.20
28.08
22.12
13.60
64.10
64.19
64.15
64.00
36.52
36.00
14.04
14.06
34.02
32.00
32.32
32.31
32.30
14.12
14.12
34.01
16.00
14.54
25.01
25.03
25.02
28.00
61.02
36.51
25.05
20.00
14.20
61.04
64.25
64.22
66.00
3.93.029
MXV 25-2
MXV 32-4
MXV 40-8
12.
Cross section drawing and designation of parts
(2)
(2)
istr_MXV25 01_2010 10-12-2009 8:23 Pagina 9

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istr_MXV25 01_2010 10 12 2009 8 23 Pagina 9 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 When tightening the nuts 28 04 be careful not the shaft with the second wrench used on the opposite side to scratch 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 ball bearing motor size 80 90 100 112 132 6206 2Z C3 6207 2Z C3 6208 2Z C3 6310 2Z C3 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 Fig 6a Rotor rested with shaft not locked in the coupling Pin for raising the shaft 10 2 Axial position of the pump rotor 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 nuts 61 04 on tie bolts screws 64 25 in the coupling screws 70 18 with nuts 70 19 8 Nm 50 Nm 22 Nm 40 Nm 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 A 12 Cross section drawing and designation of parts MXV 25 2 MXV 32 4 MXV 40 8 99 00 66 18 70 18 66 19 3 70 19 32 30 66 18 32 31 32 00 66 00 ____ 66 00 32 32 ______ 64 22 Й1Ж1 ________ 64 25 34 02 61 04 14 06____ 14 20 14 04 20 00 25 05 36 51 64 00 64 15 64 19___ 64 10 _ 25 02 13 60 25 03 22 12 25 01 28 08 14 54 1 28 04____ 14 12 14 16 14 17 14 18 14 20___ _ 34 01 61 00 14 12 Any pumps that require inspection repair must be drained and carefully cleaned inside and outside before dispatch submission 14 19 Nr 13 60 14 02 14 04 14 06 14 12 14 16 14 17 14 18 14 19 14 20 14 54 16 00 20 00 22 12 25 01 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 2 64 15 1 64 19 64 22 64 25 66 00 66 18 66 19 70 18 70 19 99 00 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 T Inserted in the stage casing cannot be supplied separately 2 See section 12 1 3 Only for motor size 132 Changes reserved 9

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