Bearing Replacement; Spare Parts - ITALVIBRAS GIORGIO SILINGARDI MVSI Serie Guia Tecnica

5.0 BEARING REPLACEMENT

We recommend to replace both bearings even if one bearing only is
defective, normally the other bearing would fail in a short time.
During the repairing check the conditions of all parts, replace them
if necessary.
Switch-off the power supply from the vibrator, dismount it from the
machine, remove the weight covers and the OR seals (fig.37, page
11), mark position of eccentric weights and disassemble them (fig.38,
page 11) with keys.
5.0.1 Frame sizes 00-01-10-AF10-20-30 & 35-40-50 (6,8,10,12 poles)
These vibrators have ball and shielded bearings that are pre-lubri-
cated for life.
Remove the two seeger rings mounted on the flanges near to the
bearings (in frame sizes 35-40-50 there aren't seegers). Press the
shaft from one side (Fig.34, page 10). The shaft will drag at one
bearing while one remains in its flange. Remove the bearing from
the shaft and remove the other bearing from the flange. Check the
bearing seats in the flange and in the shaft. If they are worn the motor
group or the shaft must be replaced.
Take new original ball bearings.
Press the first new bearing in a flange paying attention that it remains
just beyond the seat of the seeger ring, then mount the seeger ring.
ATTENTION: the shaft is not simmetrical: in one side the bearing seat
diameter is bigger than the other side. In the bigger seat the bearing
has to be pressed into it, in the other seat the bearing enter free.
Press mount the second new bearing in the bigger seat (Fig.35,
page 10).
Introduce the shaft with the second bearing into the motor group
(Fig.36, page 10) and press until shaft is in its final position. Assemble
the second seeger ring on the flange. Install the eccentric weights
with keys adjusting in the marked position, mount seals and weight
covers. Turn the shaft manually to ensure that it turns freely without
axial play.
5.0.2 Frame sizes AF30-AF33 & 35-40-50 (2,4 poles) ... up to frame 120
These vibrators have roller bearings, already lubricated in the factory
by ITALVIBRAS.
The roller bearing is composed by an inner ring on the shaft and
an outer part (outer bearing) in the flange. For frame sizes 105, 110
and 120 remove the labyrinth seals on the shaft (fig.39, page 11).
Remove a flange from the casing using the 2 threaded extraction
holes (Fig.40, page 11). Pull out the shaft (fig.41, page 11) and than
extract the second flange in the same way of the other. In each flange
extract the snap ring and push out outer bearing and bearing cover
through the bearing extraction holes (Fig.42, page 11).
Type MVSI 10/13000-S02, frame sizes 110 and 120 have no snap
ring, but 4-6 fixing screws.
Remove both inner bearings from the shaft using an extractor (Fig.43,
page 11). Clean all pieces removing old grease. Check the bearing
seat in the flange and in the shaft. If flange and/or shaft are worn
replace them. Heat the new inner rings and place them on the shaft,
push the outer bearings into the flanges with the bearing cover and
snap ring or screws.
On re-mounting the bearings (inner and outer parts) pay attention
that they rest correctly on the stroke of their seat.
Apply the new grease (see type in paragraph 5.1) in the quantity
prescribed in the «Technical Features» table (page 87-97) spreading
deeply inside the bearing applying pressure to allow penetration of
the grease into the rolling parts. Half fill the chamber between the
bearing cover and the bearing with grease.
ATTENTION: avoid grease contaminations, external particles
may strongly reduce the bearing life.
Place some grease on the flange diameter and some on the casing
diameter to make easier the flange assembling. Place some grease
also on the bearing inner rings.
Introduce the first flange in the casing, using a press or by using
fixing threads with longer screws. Keep the flange orthogonal to
the casing.
Introduce the shaft into the casing with paying attention not to touch
the wounded stator.
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Introduce the second flange into the casing, by keeping the
flange orthogonal to the shaft, otherwise the roller bearing could
be damaged (Fig. 39, page 11).
For frame sizes 105, 110 and 120, assemble the labyrinth seals
by means of LOCTITE 200M to fix it on the shaft.
Complete the assembling of the eccentric weights with keys adju-
sting in the marked position, mount seals and weight covers.
Pay attention that the seals are correctly positioned in their
seats. Control the state of the seals during this operation and
replace them if necessary.
Turn the shaft manually and ensure that it has axial play between
0.5 and 1.5 mm.
ATTENTION: Every time the afore-mentioned maintenance ope-
rations are carried out it is recommended that all disassembled
screws and spring washers are replaced and that the screws
are tightened using a dynamometric wrench.
5.1 LUBRICATION
All bearings are correctly lubricated on mounting the vibrator.
All ITALVIBRAS vibrators are realised to use the "FOR LIFE",
lubrication system and therefore do not require periodical
lubrication.
Only for heavy work, as for example 24 hour service with high en-
vironmental temperatures, starting from gr. AF33 and 35 periodical
re-lubrication of the bearings is recommended, using the two external
greasers with the following type of grease:
- speed of 3000 rpm or higher: KLUEBER ISOFLEX NBU 15;
- speed of 1800 rpm or lower: KLUEBER STABURAGS NBU 8
EP;
- MVSI special series 600-720 rpm: KLUEBER ISOFLEX NBU 15.
Approximately, on average, the frequency of re-lubrication can be
included between 1000 and 5000 hours and depends on the ope-
rative conditions and the type of vibrator, therefore it can be lower
or higher than the indicated values. The quantity of grease to be
introduced on periodical lubrication is indicated in the table on page
87. It is advised to contact ITALVIBRAS for particular uses which
is at complete disposal to advise the client on the best lubrication
possible for the specific use.
Never mix greases even if they have similar features. Excessive
quantity of grease causes increased heating of the bearings and
consequent anomalous current absorption.
Respect the ecological laws in force in the country in which the
equipment is used, relative to use and disposal of products used
for cleaning and maintenance of the vibrator. Always comply with
recommendations of the manufacturer of these products.
If the machine must be demolished, comply with the anti-pollu-
tion regulations envisioned in the country of use.
Remember that the Manufacturer is always available for any
type of assistance and spare parts.

5.2 SPARE PARTS

On requesting spare parts always state:
- Type of vibrator (TYPE detectable from the identification plate).
- Vibrator series (SERIES detectable from the identification
plate).
- Serial number (SERIAL NO. detectable from the identification
plate).
- Power supply voltage and frequency (VOLT and HZ detectable
from the identification plate).
- Spare part number (detectable from the spare part table starting
from page 96) and desired quantity.
- Exact destination address of the goods and means of
delivery.
ITALVIBRAS, declines any liability for incorrect forwarding due
to incomplete or confused requests.
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