Calpeda MXV, Original Operating Instructions

Page: 9 / 80

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 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
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 (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
64.22
Fig. 6a
Rotor rested, with shaft not
locked in the coupling.
(
*
) Pin for raising the shaft.
Fig. 6b
Rotor raised, position for locking
the 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 Washer
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