OmarLift D842M2L.003 User manual

WITTUR HYDRAULIC DRIVES
Soggetto a modifica senza preavviso! Subject to change without notice!
Pagina/Page D842MGB.001
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
OPERATING INSTRUCTIONS
FOR WITTUR HD
HYDRAULIC CYLINDERS
WITTUR HYDRAULIC DRIVES SRL
Via F.lli Kennedy 22/d I - 24060 Bagnatica (BG) ITALY
Tel. [phone] Fax [phone]
No part of this publication may be reproduced or
translated, even in part, without the prior written
permission of WITTUR HYDRAULIC DRIVES SRL
D842MGB
We reserve the right to modify the specifications,
data and pictures of this manual.
www.omarlift.eu
OMARLIFT SRL
Via F.lli Kennedy 22/D - 24060 Bagnatica (BG) - ITALY
Tel. [phone] - Fax [phone]
E-mail: [e-mail]
OPERATING INSTRUCTIONS
FOR OMAR LIFT HD
HYDRAULIC CYLINDERS
OMAR LIFT SRL
Pagina/Page D842M2L.001
Data/Date 09.2008
Versione/Issue 1
D842M2L

WITTUR HYDRAULIC DRIVES
Index
1. Transport and storage of the hydraulic cylinders .............................D842MGB.003
1.1 General information ......................................................................................................D842MGB.003
1.2 Cylinder ..............................................................................................................................D842MGB.003
1.3 Cylinders transport .........................................................................................................D842MGB.003
1.4 Anti-pollution measures ...............................................................................................D842MGB.003
1.5 Control of the supplied material ................................................................................D842MGB.003
1.6 Identification stickers ....................................................................................................D842MGB.003
1.7 Cylinders storage .............................................................................................................D842MGB.004
2. Assembling of the hydraulic cylinders ................................................D842MGB.004
2.1 Cylinder ..............................................................................................................................D842MGB.004
2.2 Assembling of the side acting cylinders roped 2:1 or 1:1 .................................D842MGB.005
2.3 Assembling of the underground direct acting cylinders ....................................D842MGB.005
2.4 Cylinders in two pieces ..................................................................................................D842MGB.005
2.5 Cylinders in three pieces ...............................................................................................D842MGB.006
2.6 Connection of installations with two cylinders ....................................................D842MGB.007
3. Maintenance of the hydraulic cylinders .............................................D842MGB.008
3.1 Circuit filling and air purging .....................................................................................D842MGB.008
3.2 Control of the new cylinder ....................................................................................... D842MGB.009
3.3 Cylinder losses ................................................................................................................. D842MGB.009
3.4 Seal replacement on a single-stage cylinder ........................................................ D842MGB.009
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Pagina/Page D842MGB.002
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
OMAR LIFT
D842M2L.003
D842M2L.003
D842M2L.003
D842M2L.003
D842M2L.003
D842M2L.003
D842M2L.004
D842M2L.004
D842M2L.005
D842M2L.005
D842M2L.005
D842M2L.006
D842M2L.007
D842M2L.008
D842M2L.009
D842M2L.009
D842M2L.009
D842M2L.003
D842M2L.004
D842M2L.008
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WITTUR HYDRAULIC DRIVES
1. Transport and storage of the hydraulic
cylinders
1.1 General information
For the transport and storage of the hydraulic components,
the general safety regulations always have to be followed:
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1.2 Cylinder
The cylinder rod is blocked against the cylinder with a
stirrup so that it can not get off during any moving or
transport. In the cylinders in two pieces, the joints are
protected by two protection flanges, blocked against the
cylinder flanges with two screws. The two protection
flanges are needed to keep the two parts of the rod
blocked, avoiding water and dirt from getting inside it.
1.3 Cylinders transport
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1.4 Anti-pollution measures
Possible spilled oil from the circuit during repair operations
has not to be spread in the environment.
For the disposal of oil and clothes containing oil contact the
specialised companies and follow carefully the regulations
in force in the country of operation.
1.5 Control of the supplied material
When the material is collected before signing the delivery
document of the forwarding agent, check that the goods
correspond to the list reported in the delivery document
and to the requested order.
1.6 Identification stickers
The main supplied components have their own sticker
containing all the data needed to identify them:
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Pagina/Page D842MGB.003
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
If the cylinder is lifted with clamp trucks, it has to be
lifted in the middle and the arms have to be positioned at
their max. distance.
If the cylinder needs to be rolled, make it roll very slowly
to avoid bruises on the rod.
Lay the cylinders preferably horizontally on the truck floor
and avoid leaning the cylinder against the cabin roof in
order to prevent that vibrations during the transport
cause bruises on the rod.
When loads have to be lifted, use only proper hoists
and respect their max. capacity.
Never walk or stop under the hanging loads.
Avoid hydraulic components from shocks.
If the hydraulic components have to be stored, first
control that packaging and protections are in a perfect
state; if necessary repair or replace them with other more
suitable ones;
Store the hydraulic components in a dry place, dust free
with a temperature between 5° and 30° C;
If the cylinders or the pump units have to be stored for a
long time, it is better for their preservation to fill them
with oil.
The loading and unloading on the means of transport
have to be made with proper hoists or clamp trucks.
If the cylinder is vertically lifted, the rod has to be turned
upward and the ropes for the lifting have to be fixed on
the cylinder and not on the rod (see drawing n. 1).
Draw. n.1 Cylinder lifting with ropes
Cylinder: adhesive sticker on the cylinder head
Rupture valve: sticker on the valve side
OMAR LIFT
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WITTUR HYDRAULIC DRIVES
1.7 Storage of the cylinders
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2. Assembling of the hydraulic cylinders
2.1 The cylinder
The cylinder serial number is on a sticker on the cylinder
head on the same side where the rupture valve is
assembled. This number appears also on the identification
sticker together with the remaining data of the cylinder (see
drawing n. 2).
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Data/Date 09.2008
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Hydraulic cylinders
Operating instructions
Before storing, check that the protection packaging is in
a perfect state of preservation.
After having positioned the cylinders on proper supports,
block them in a way that they can not fall.
If cylinders in one piece have to be stored for a long time,
it is better to fill them with anti-corrosive oil. Since the oil
volume increases or decreases according to the
temperature, it is better not to fill the cylinders
completely.
If cylinders in two pieces have to be stored for a long time,
check that the flanges closing the joint close hermetically
and that the rods are well greased. Keep both the closing
flanges and the rod which comes out from the cylinder
well covered with grease.
Before putting the installation into action, replace the oil
used for the filling up and remove the excessive grease.
All the cylinders, both those in one piece and those in two
pieces, are tested in the factory at two levels of pressure
to guarantee the sealing of the seals and the sealing of the
welding.
The oil used for tests is then taken out of the cylinder. The
small quantity which remains inside acts as a protection
against rust for a long period of time. If the cylinders
remain on the site for a long time, it is better to control
the state of preservation of the rod, cleaning and
polishing it, if necessary. For long periods of storage see
point 2.2 in the operating instructions manual for the
hydraulic components.
The oil inlet (and therefore the rupture valve) can be at the
top or at the bottom; this data has to be decided when
ordering.
The rupture valve, assembled directly on the cylinder, can
be oriented in four directions with intervals of 90° each.
If in the lift shaft brickwork, painting or welding has to be
carried out, protect the cylinder head with grease and
clothes. Clean carefully after having finished the work
before putting the installation in action.
The cylinder has to be assembled perfectly perpendicular.
When the rod has reached its max. length out of the
cylinder it has to be perfectly parallel to the guides.
All the cylinders have a line elbow fitting on the head.
This fitting allows the collection of the oil lost by the
cylinder, it has to be screwed in the proper threaded hole
on the highest part of the cylinder and then connected
through a PVC pipe to a small tank for the oil recovery. In
this way the oil loss can always be detected.
Tipo:
Type:
Typ:
Matricola:
Serial Nr.:
Artikelnr:
Cliente:
Customer:
Kunder:
Impianto nr.:
Customer Ref.:
Kunden Nr.:
ATTENZIONE!
Proteggere la testa del cilindro
durante l’installazione
ATTENTION!
On installation please protect
the cylinder head
ACHTUNG!
Den kopf des Zylinders bei
installation schutzen
CYLINDER C97 ø
090x5x7000 TG
######
XXXXX XXXXXX XX
XXXX XXXXX XX
Draw. n. 2 Identification stickers of the cylinder
OMAR LIFT
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WITTUR HYDRAULIC DRIVES
2.2 Assembling of side acting cylinders, roped 2:1 or 1:1
The assembling of side acting cylinders is normally carried
out according to the following two systems:
a)
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b)
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Data/Date 09.2008
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Hydraulic cylinders
Operating instructions
Indirect side acting cylinder, roped 2:1, at one stage,
assembled on a small pillar (same system for the
installation with two cylinders).
The pillar is fixed at the bottom to the beam of the pit
and at the top of the wall or to the guides through
adjustable fixing.
The cylinder lays on an adjustable support assembled on
the top of the pillar. A disk of anti-vibration insulating
material can be placed between the pillar and the
cylinder.
The cylinder head is fixed to the wall or to the guides in
an adjustable way. Other middle fixing points can be
added according to the cylinder length. At this purpose
follow carefully the installation project drawing.
The pulley assembled on the rod head has to be well
guided, without excessive clearances on the guides or
forcing all along the travel.
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2.3 Assembling of underground direct acting cylinders
Underground direct central acting cylinders are supplied
with an upper plate with a spherical joint (see drawing n. 3,
page 005) and with a middle support plate which is
articulated in case of telescopic cylinders. The cylinder part
laying under the middle plate is protected by a special
anti-corrosive black paint.
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2.4 Cylinders in two pieces
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The direct side acting cylinder lays directly on the pit
bottom. The rod head is equipped with a spherical joint
(see drawing n. 3), which allows the frame to be hooked
in a flexible way, without movements. The spherical joint
has to be greased before fixing the plate at the frame.
Draw. n. 3 Head of the direct acting cylinder with spherical joint
The articulated plates have to be greased where they
move, before being installed.
Before installing the cylinder, it is better to control the
dimensions of the hole which is going to contain the
cylinder.
Moreover the cylinder has to be protected against
corrosion and has to be installed inside a protection tube.
Only when the installation is perfectly working, the
cylinder could be rammed.
The cylinder positioning has to be made according to the
project dimensions.
It is suggested to operate according to the following
directions to position the cylinder perfectly
perpendicular and parallel to the guides:
Normal direct central acting cylinders at one stage: draw
the nylon wire, which is inside the rod, and check if it
comes out perfectly at the centre of the threaded hole
and is parallel to the guides.
Direct side acting cylinder roped 1:1, at one stage (same
system for installations with two cylinders). Cylinders in two or three pieces have a rod with a
threaded joint, while the cylinder has a joint with a
squared flange.
OMAR LIFT
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Data/Date 09.2008
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WITTUR HYDRAULIC DRIVES
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1)
2)
3)
4)
5)
6)
7)
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8)
9)
10)
11)
2.5 Cylinders in three pieces
1)
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Data/Date 09.2008
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Hydraulic cylinders
Operating instructions
It is necessary, after having removed the protection
hoods, to put some rubber stripes between the rod
and the cylinder, in order to avoid damages to the
rod. These stripes have to be fixed well to the screws
of the flanges and have to be removed just before
closing the square flanges of the cylinder.
Follow the next operating instructions for the assembling
of the two pieces (see drawing n. 4):
Put the lower part of the cylinder in a perfect vertical
position and fix it, unscrew the screws that fix the
protection hood to the flange on the cylinder head.
Draw out the rod for a length of around 1/2 metre, fix the
special wrench or other tools well protected by rubber or
similar material. Then take the protection hoods away.
Remove the potection rubber on the upper half of the
rod.
Check if the upper block stirrup is present and if it
is fixed through the M30 screw.
Disassemble the rod protection hood unscrewing the
fixing screws.
Lift the upper half of the cylinder with an hoist
fastening it to the holed plates welded on the head.
Let the rod draw out paying attention to avoid scriping
and knocks to the cylinder.
Block the rod of the upper half with a screwer or with
another tool insulated with rubber, without making it
come out of the head which contains the seals.
The block stirrup of the rod has to be removed only
when the operation has finished.
Remove grease and clean the male and female threads,
avoiding that the solvent contacts the OR of the joint.
Control carefully that there are no bruises neither
on the threads nor on the joint. If necessary, get rid
of them.
Control that the OR of the joint is not damaged and is
well greased.
Lower the upper half of the cylinder and slowly
approach the threads without harsh movements.
Control the alignment and completely screw
without using the thread-locking liquid.
If there are any difficulties with screwing, unscrew
immediately, control the threads and try again.
After having completely screwed the two halves, unscrew
by 4/5 turns, apply the thread-locking liquid on the screw
(not on the OR), quickly screw again, checking that the
red paint signs are aligned (max tolerance 4/5 mm).
Remove the screwers and control by hand that the
joint of the rod is perfect all around, without bruises
and steps. If necessary, smooth with fine abrasive
paper (grain 320-400).
Check that the OR of the lower flange is perfect and
positioned in its own housing. Clean the two flanges.
Pull the two square flanges closer, matching the pin
with the hole. Then screw the four screws that block
the flanges, tighting crosswise.
The upper half of the cylinder in two pieces has a rod
which is longer than the cylinder, so it is possible to fix
the screwer to the rod without disassembling the cylinder.
The two joints of the cylinder in two pieces are
hermetically closed by two metal hoods which act as a
protection and packaging during the transport.
In case of three pieces cylinders, we advice to proceed as
follows:
In the first step, assembly the cylinder lower part with
the intermediate one, considering these two parts as
being one cylinder in two pieces. To facilitate this
operation, the intermediate part jacket can be completely
unthreaded and put back after having assembled the first
two parts.
OMAR LIFT
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WITTUR HYDRAULIC DRIVES
Soggetto a modifica senza preavviso! Subject to change without notice!
Pagina/Page D842MGB.007
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
2)
2.6 Connection of installations with two cylinders
In case of installations with two cylinders, the pipes
which feed the two cylinders must have the same
diameter, the same length, and follow ways as
symmetrical as possible (see drawing n. 5).
The rupture valves of the two cylinders have to be
hydraulically connected allowing the piloting
pressure balance. The rupture valves are equipped
with a 1/8” threaded hole. The connection has to
be done with 1/8” fittings and steel pipes with a 6
mm diameter, 1 mm thick or flexible hose. See also
“Operating instructions for rupture valves”
(D840M).
Fittings 1/8 GAS
Balancing connection
Rupture valve “1” Rupture valve “2”
Three-way
fitting
Lift valve
Screwer
O-Ring
Rod
Red paint sign
Cylinder
Hole
Pin
Draw. n. 4 Cylinder in two pieces with screwers
Draw. n. 5 Installation with two cylinders
In the second step, assembly the upper part with the two
ones previously connected. Even in this phase, we can
proceed like for the two pieces cylinders assembling and
follow the same indications mentioned above.
OMAR LIFT
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WITTUR HYDRAULIC DRIVES
3. Maintenance of the hydraulic
cylinders
3.1 Circuit filling and air purging
When an installation is new, the tank, the cylinder, the
connection pipes, the valve and the silencer have no oil
inside. Consequently, it is necessary to fill very well all the
components of the hydraulic circuit and purge air out of
them completely.
1)
2)
3)
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4)
5)
6)
7)
Pagina/Page D842MGB.008
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
In order to have a very silent installation, without
foam in the oil, and very low overheating, the
quantity of oil to be put in the installation has to
be the max allowed. The max quantity of oil
necessary for the installation corresponds to the
sum of the oil needed to fill the tank, plus the oil
needed to fill the cylinder (space between the
cylinder and the rod), plus the oil needed to fill
the pipes. The oil filling has to be done pouring
the oil from the side of the moving half-cover,
bringing the level at about 8/10 cm from the
upper edge.
Before pouring the oil into the tank, make sure
that there is no dirt or water inside.
The air has to be purged from the highest point of
the circuit which normally is the cylinder head.
The oil has to enter the circuit very slowly,
without creating turbulence and mixing with air
which needs time to get out.
Operate as follows to get rid of the air completely.
Unscrew completely and remove the purge screw on the
head of the cylinder (or cylinders).
If the rupture valve is not adjusted (red label on it), its
regulation screw has to be unscrewed.
Disconnect electrically the coil of the high speed
electro-valve. Only in this way a small quantity of oil gets
into the cylinder without turbulence.
Activate the motor for an up travel (star-delta too, if it
exists) for some seconds and check if the pump turns in
the right direction. If it turns in the wrong way, a strong
and bothering noise will be heard. The two phases in the
motor feeding need to be inverted.
Keep the motor activated for 10-15 seconds and stop it
for 20-30 seconds to allow the air to go out. Repeat this
operation several times, until only oil, without air, comes
out from the purge screw.
Close the purge screw of the cylinder.
Reset the oil level in the tank, if necessary, and make an
upward travel at low speed, checking that all the parts of
the installation are in order and that the oil quantity is
enough. The motor has always to be covered by oil even
when the cylinder is at the upper end.
Rupture valve adjusting
screw.
Unscrew if the valve is not
preset (red label)
Cylinder purging screw.
Open completely
Avoid that the oil level decreases until it uncovers
the motor-pump group. In this case in fact the
pump could suck air, making all the above
purging operations void.
OMAR LIFT
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Data/Date 09.2008
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It is necessary that the room inside the cylinder head and
the hole leading to the PVC pipe are not obstructed by dirt.
Cylinder losses depend on the traffic intensity and seal wear.
When losses are more than 1 or 2 litres per month, it is
better to replace the cylinder seals.
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3.4 Seal replacement on a single-stage cylinder
The seals of a normal cylinder are positioned on the
cylinder head (see drawing n. 6). Seals replacement consists
in replacing the three sealing parts:
- The main seal of the rod
- The sealing O’ring on the iron ring thread
- The rod scraper
The iron ring which holds the seal is screwed. The
unscrewing operation is facilitated by 4 blind threaded holes
M10. It is possible to unscrew the iron ring introducing 4
screws in the 4 holes or using proper hook spanners which
can be found on the market.
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WITTUR HYDRAULIC DRIVES
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Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
9)
10)
3.2 Control on the new cylinder
After having installed the hydraulic part, make the
following checks starting up the first travels:
3.3 Cylinder losses
Big cylinder losses are due to wear or to damaged seals,
which are located in the head of the cylinder itself. The oil
coming out from the cylinder is collected in the provided
room and, through a PVC pipe, conveyed to a transparent
tank.
Before putting the cylinder into action, control
that on its head, close to the wiper, there are no
debris, concrete, metal particles or welding
cinders which could scrape the rod during its first
travel.
After the first up travel, immediately control the
whole surface of the rod to verify its state of
preservation. In particular, if the cylinder is long,
control the central part of the rod whose rectified
surface could have been bruised by the vibrations
during the transport. It would be necessary to
smooth patiently with fine abrasive paper to avoid
the precocious damaging of the seals.
In underground direct acting cylinders, oil losses can be
due to chemical or electrical corrosion of the cylinder.
This phenomenon is detected by the continuous
decreasing of the oil level in the tank.
In case oil soaks into the ground, the underground
cylinder has to be disassembled and replaced.
Underground cylinder have to be put inside a
protection wrapping to avoid ground and
groundwater pollution.
Protect the cylinder head during the assembling
and till all the operations are finished.
Before replacing the seals, control the rod surface
and get rid of possible irregularities, such as scores
or bruises which could damage the new seals:
Check that in the circuit there is no remaining air. At
this purpose, stop the car on an intermediary floor, close
the shut-off valve and turn off the power, get into the
car and check that there is no strong lowering, get off
the car and verify that the car does not go quickly back
to its initial position.
Connect again the coil of the electro-valve to obtain the
high speed and check the other functions: acceleration,
deceleration, upward start, downward start, etc.
Take the car in upper extra travel and the cylinder in
upper end position.
Carefully take place near the head and, if
necessary, secure with a proper safety sling to be
able to work safely and freely.
OMAR LIFT
Pagina/Page D842M2L.009
Data/Date 09.2008
Versione/Issue 1

Scraper
Guide ring
OR on the thread
Main seal
Guide ring
OR joint
Iron ring
WITTUR HYDRAULIC DRIVES
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Pagina/Page D842MGB.010
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
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Clean the cylinder head, unscrew completely the
screw of the counter-pressure. Make the rod break
back with the hand manoeuvre until the
manometer shows pressure = zero.
Unscrew the threaded iron ring holding the seals.
Remove the old seal, the O’ring on the thread and the
scraper.
Control and clean the guide rings and position them in
their place. (Have access to the second guide ring by
taking out the metal bush, laying under the iron ring,
screwing two small screws M3 on the bush itself to lift it).
Clean and control the seats, reassemble the new seals,
paying attention not to damage them and position them
in the same way as the old ones. (The writing “PRESSURE
SIDE”, if existing, has to be turned toward the cylinder
inside!).
Reassemble the bush (in case it has been taken out),
screw again the iron ring with the new seal, purge the
air and put the installation into action.
In case of direct acting installation disconnect the rod
from the frame. While in case of indirect acting ones,
disconnect the rod from the pulley.
Block the car, using stops in the most comfortable
position. In case of indirect acting installations,
block with a stop even the support of the pulley.
Get rid of any irregularities found visually or
touching it by using a thin abrasive paper (320 ÷
400). In case scores are deep or damages are
important, fix the paper on a wooden support.
Check the rod surface half metre by half metre, all along
its length, making a slow down travel with hand
emergency.
Draw. n. 6 Replacement of the seal on a one-stage cylinder
After having controlled the last half metre of the rod,
operate to replace the seals.
OMAR LIFT
Pagina/Page D842M2L.010
Data/Date 09.2008
Versione/Issue 1

Scraper
Guide ring
OR on the thread
Main seal
Guide ring
OR joint
Iron ring
WITTUR HYDRAULIC DRIVES
Soggetto a modifica senza preavviso! Subject to change without notice!
Pagina/Page D842MGB.010
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
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Clean the cylinder head, unscrew completely the
screw of the counter-pressure. Make the rod break
back with the hand manoeuvre until the
manometer shows pressure = zero.
Unscrew the threaded iron ring holding the seals.
Remove the old seal, the O’ring on the thread and the
scraper.
Control and clean the guide rings and position them in
their place. (Have access to the second guide ring by
taking out the metal bush, laying under the iron ring,
screwing two small screws M3 on the bush itself to lift it).
Clean and control the seats, reassemble the new seals,
paying attention not to damage them and position them
in the same way as the old ones. (The writing “PRESSURE
SIDE”, if existing, has to be turned toward the cylinder
inside!).
Reassemble the bush (in case it has been taken out),
screw again the iron ring with the new seal, purge the
air and put the installation into action.
In case of direct acting installation disconnect the rod
from the frame. While in case of indirect acting ones,
disconnect the rod from the pulley.
Block the car, using stops in the most comfortable
position. In case of indirect acting installations,
block with a stop even the support of the pulley.
Get rid of any irregularities found visually or
touching it by using a thin abrasive paper (320 ÷
400). In case scores are deep or damages are
important, fix the paper on a wooden support.
Check the rod surface half metre by half metre, all along
its length, making a slow down travel with hand
emergency.
Draw. n. 6 Replacement of the seal on a one-stage cylinder
After having controlled the last half metre of the rod,
operate to replace the seals.
OMAR LIFT
Notes

Scraper
Guide ring
OR on the thread
Main seal
Guide ring
OR joint
Iron ring
WITTUR HYDRAULIC DRIVES
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Pagina/Page D842MGB.010
Data/Date 09.2008
Versione/Issue 1
Hydraulic cylinders
Operating instructions
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Clean the cylinder head, unscrew completely the
screw of the counter-pressure. Make the rod break
back with the hand manoeuvre until the
manometer shows pressure = zero.
Unscrew the threaded iron ring holding the seals.
Remove the old seal, the O’ring on the thread and the
scraper.
Control and clean the guide rings and position them in
their place. (Have access to the second guide ring by
taking out the metal bush, laying under the iron ring,
screwing two small screws M3 on the bush itself to lift it).
Clean and control the seats, reassemble the new seals,
paying attention not to damage them and position them
in the same way as the old ones. (The writing “PRESSURE
SIDE”, if existing, has to be turned toward the cylinder
inside!).
Reassemble the bush (in case it has been taken out),
screw again the iron ring with the new seal, purge the
air and put the installation into action.
In case of direct acting installation disconnect the rod
from the frame. While in case of indirect acting ones,
disconnect the rod from the pulley.
Block the car, using stops in the most comfortable
position. In case of indirect acting installations,
block with a stop even the support of the pulley.
Get rid of any irregularities found visually or
touching it by using a thin abrasive paper (320 ÷
400). In case scores are deep or damages are
important, fix the paper on a wooden support.
Check the rod surface half metre by half metre, all along
its length, making a slow down travel with hand
emergency.
Draw. n. 6 Replacement of the seal on a one-stage cylinder
After having controlled the last half metre of the rod,
operate to replace the seals.
OMAR LIFT

WITTUR HYDRAULIC DRIVES
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I - 24060 Bagnatica (BG) ITALY
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E-mail: [e-mail]
WITTUR
HYDRAULIC DRIVES SRL
OMAR LIFT
Via F.lli Kennedy 22/D
I - 24060 Bagnatica (BG) - ITALY
Tel. [phone] - Fax [phone]
http:// www.omarlift.eu
E-mail: [e-mail]

WITTUR HYDRAULIC DRIVES
Soggetto a modifica senza preavviso! Subject to change without notice!
Pagina/Page D842MIT.001
Data/Date 09.2008
Versione/Issue 1
Cilindri idraulici
Istruzioni operative
MANUALE DI ISTRUZIONI
PER CILINDRI IDRAULICI
WITTUR HD
WITTUR HYDRAULIC DRIVES SRL
Via F.lli Kennedy 22/d I - 24060 Bagnatica (BG) ITALY
Tel. [phone] Fax [phone]
No part of this publication may be reproduced or
translated, even in part, without the prior written
permission of WITTUR HYDRAULIC DRIVES SRL
D842MIT
We reserve the right to modify the specifications,
data and pictures of this manual.
www.omarlift.eu
OMARLIFT SRL
Via F.lli Kennedy 22/D - 24060 Bagnatica (BG) - ITALY
Tel. [phone] - Fax [phone]
E-mail: [e-mail]
MANUALE DI ISTRUZIONI
PER CILINDRI IDRAULICI
OMAR LIFT
Pagina/Page D842M2L.001
Data/Date 09.2008
Versione/Issue 1
D842M2L
OMAR LIFT SRL

WITTUR HYDRAULIC DRIVES
Indice
1. Trasporto e immagazzinamento dei cilindri idraulici ........................D842MIT.003
1.1 Generalità ............................................................................................................................D842MIT.003
1.2 Cilindro .................................................................................................................................D842MIT.003
1.3 Trasporto dei cilindri ........................................................................................................D842MIT.003
1.4 Precauzioni antinquinamento .......................................................................................D842MIT.003
1.5 Controllo del materiale fornito ....................................................................................D842MIT.003
1.6 Etichette di identificazione ............................................................................................D842MIT.003
1.7 Immagazzinamento dei cilindri ....................................................................................D842MIT.004
2. Montaggio dei cilindri idraulici ..............................................................D842MIT.004
2.1 Il cilindro ..............................................................................................................................D842MIT.004
2.2 Montaggio dei cilindri laterali rapporto 2:1 o 1:1 .................................................D842MIT.005
2.3 Montaggio dei cilindri diretti interrati ......................................................................D842MIT.005
2.4 Cilindri in due pezzi .........................................................................................................D842MIT.005
2.5 Cilindri in tre pezzi ...........................................................................................................D842MIT.006
2.6 Collegamento di impianti con due cilindri ...............................................................D842MIT.007
3. Manutenzione dei cilindri idraulici ........................................................D842MIT.008
3.1 Riempimento del circuito e spurgo dell’aria ............................................................D842MIT.008
3.2 Controlli sul cilindro nuovo .......................................................................................... D842MIT.009
3.3 Perdite del cilindro ............................................................................................................D842MIT.009
3.4 Sostituzione guarnizioni cilindro ad uno stadio .................................................... D842MIT.009
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Istruzioni operative
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WITTUR HYDRAULIC DRIVES
1. Trasporto e immagazzinamento dei
cilindri idraulici
1.1 Generalità
Per il trasporto e l’immagazzinamento dei componenti
idraulici occorre applicare sempre le norme generali di
sicurezza e prevenzione incidenti:
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1.2 Cilindro
Lo stelo del cilindro è bloccato con una staffa alla camicia,
in modo che esso non possa fuoriuscire durante la
movimentazione e il trasporto. Nei cilindri in due pezzi le
due giunte sono protette da due flange di protezione,
bloccate alle flange del cilindro con due viti. Le due flange
di protezione servono a tenere bloccate le due parti dello
stelo e ad impedire che sporco ed acqua entrino.
1.3 Trasporto dei cilindri
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1.4 Precauzioni antinquinamento
L’olio eventualmente fuoriuscito dal circuito durante le
operazioni di riparazione non deve essere disperso
nell’ambiente.
Per lo smaltimento dell’olio o degli stracci intrisi di olio
occorre rivolgersi a ditte specializzate e seguire
scrupolosamente le norme vigenti nel paese in cui si sta
operando.
1.5 Controllo del materiale fornito
Al ritiro del materiale o comunque prima di prenderlo in
carico dal trasportatore, controllare che la merce
corrisponda a quanto elencato nel documento di trasporto
ed a quanto richiesto nell’ordine.
1.6 Etichette di identificazione
I componenti principali forniti sono corredati di etichetta
contenente i dati completi per la loro identificazione:
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Cilindri idraulici
Istruzioni operative
Se si solleva il cilindro con carrelli elevatori, esso deve
essere preso a metà e le pale del carrello devono essere
posizionate alla massima distanza.
Se si deve far rotolare il cilindro, farlo rotolare molto
lentamente per evitare ammaccature allo stelo.
Distendere preferibilmente il cilindro in orizzontale sul
piano di carico del camion evitando di appoggiarlo a
sbalzo sul tetto di cabina per evitare che le vibrazioni
durante il trasporto producano ammaccature allo stelo.
Quando si devono sollevare dei carichi usare solo
dei paranchi adatti e rispettare sempre le loro
portate massime.
Non transitare mai o sostare sotto i carichi sospesi.
Evitare che i componenti idraulici subiscano urti o
forti colpi.
Se si devono immagazzinare i componenti idraulici, prima
controllare lo stato di conservazione degli imballi e delle
protezioni; eventualmente riparare o sostituire con altri
più adatti allo scopo.
Immagazzinare i componenti idraulici in ambienti asciutti,
non polverosi con temperatura compresa fra 5 e 30° C.
Se si devono immagazzinare i cilindri per un lungo
periodo, per la loro conservazione è meglio riempirli con
olio.
Il carico e lo scarico dai mezzi di trasporto devono essere
fatti con adatti paranchi o carrelli di sollevamento.
Se si solleva il cilindro in verticale lo stelo deve essere
rivolto verso l’alto e le funi per il sollevamento fissate sul
cilindro e non sullo stelo (vedi Fig. 1).
Fig.1 Sollevamento del cilindro in verticale
Cilindro: etichetta adesiva in testa al cilindro.
Vavola di blocco: etichetta sul fianco della valvola.
OMAR LIFT
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WITTUR HYDRAULIC DRIVES
1.7 Immagazzinamento dei cilindri
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2. Montaggio dei cilindri idraulici
2.1 Il cilindro
Il numero di matricola del cilindro è sulla targhetta posta
sulla testa del cilindro stesso, nel lato dove è fissata la
valvola di blocco ed è inoltre riportato sull’etichetta di
identificazione insieme agli altri dati del cilindro (vedi Fig. 2).
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Cilindri idraulici
Istruzioni operative
Prima dell’immagazzinamento controllare che gli imballi
di protezione siano in perfetto stato di conservazione.
Dopo averli riposti su appositi supporti, bloccarli in modo
che non possano cadere.
Se si devono immagazzinare i cilindri in un pezzo per un
lungo periodo è meglio riempirli di olio anticorrosione.
Poichè il volume dell’olio varia con la temperatura è bene
non riempire completamente il cilindro.
Se si devono immagazzinare per un lungo periodo i
cilindri in due pezzi controllare che le flange di chiusursa
della giunta chiudano ermeticamente e che gli steli siano
bene ingrassati. Mantenere bene ricoperte di grasso sia le
flange di chiusura che la parte di stelo che fuoriesce dal
cilindro.
Prima della messa in funzione sostituire l’olio di
riempimento e togliere l’eventuale grasso in eccesso.
Tutti i cilindri, sia quelli costruiti in un pezzo che quelli
costruiti in due pezzi, vengono provati in officina con due
livelli di pressione al fine di garantire la tenuta delle
guarnizioni e la tenuta delle saldature.
L’olio usato per le prove viene tolto dall’interno dei
cilindri ma comunque quello che resta è sufficiente a
garantire una corretta protezione contro la ruggine per
un buon periodo di tempo.
Specie se i cilindri restano a lungo sul cantiere è bene
controllare lo stato di conservazione dello stelo ed
eventualmente pulire e lucidare. Per lunghi periodi di
immagazzinamento vedere il punto 2.2 del manuale di
istruzioni per componenti idraulici.
L’attacco dell’olio (e quindi la valvola di blocco) può essere
situato in alto oppure in basso, ma questo deve essere
concordato in fase di ordine.
La valvola di blocco, montata direttamente sul cilindro,
può essere orientata su quattro direzioni ad intervalli di
90°.
Se nel vano ascensore si devono eseguire lavori di
muratura, di verniciatura o saldatura occorre proteggere
la testa del cilindro con grasso e stracci e pulire
accuratamente a lavori ultimati, prima della messa in
movimento dell’impianto.
Il cilindro deve essere montato bene a piombo e
comunque con lo stelo sfilato esso deve risultare sempre
perfettamente parallelo alle guide.
Tutti i cilindri sono forniti con un raccordo a gomito sulla
testa. Esso serve per il recupero dell’olio perduto dal
cilindro. Questo raccordo deve essere avvitato
nell’apposito foro filettato sulla parte più alta del cilindro
e collegato con un tubetto in PVC alla tanica recupero olio
in modo che l’entità delle perdite risulti controllabile.
Tipo:
Type:
Typ:
Matricola:
Serial Nr.:
Artikelnr:
Cliente:
Customer:
Kunder:
Impianto nr.:
Customer Ref.:
Kunden Nr.:
ATTENZIONE!
Proteggere la testa del cilindro
durante l’installazione
ATTENTION!
On installation please protect
the cylinder head
ACHTUNG!
Den kopf des Zylinders bei
installation schutzen
CYLINDER C97 ø
090x5x7000 TG
######
XXXXX XXXXXX XX
XXXX XXXXX XX
Fig.2 Etichetta di identificazione del cilindro
OMAR LIFT
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WITTUR HYDRAULIC DRIVES
2.2 Montaggio dei cilindri laterali rapporto 2:1 o 1:1
Il montaggio dei cilindri laterali è fatto normalmente nei
seguenti due sistemi:
a)
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b)
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Cilindri idraulici
Istruzioni operative
Cilindro indiretto laterale rapporto 2:1, ad un solo
sfilamento, montato su pilastrino (oppure stesso sistema
con due cilindri).
Il pilastrino è fissato in basso sulla trave di fondo fossa ed
in alto alla parete oppure alle guide con fissaggio
regolabile.
Il cilindro è appoggiato su di un supporto regolabile
montato sopra il pilastrino. Fra il pilastrino e il cilindro
può essere interposto un disco di materiale isolante
antivibrazioni.
La testa del cilindro è fissata in modo regolabile alla
parete o alle guide. A seconda della lunghezza del
cilindro potranno essere previsti altri punti intermedi di
fissaggio. Attenersi per questo al disegno di progetto
dell’impianto.
La puleggia montata sulla testa dello stelo deve essere
ben guidata, senza eccessivi giochi sulle guide e senza
forzature per l’intera corsa.
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2.3 Montaggio dei cilindri diretti interrati
I cilindri diretti centrali sono forniti con una piastra
superiore a snodo sferico (vedi Fig. 3) e con una piastra di
appoggio intermedia, che per i cilindri telescopici è anche
snodata. La parte di cilindro al di sotto della piastra
intermedia è protetta con una speciale vernice
anticorrosione.
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2.4 Cilindri in due pezzi
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Il cilindro diretto laterale è appoggiato direttamente sul
fondo della fossa. La testa dello stelo è fornita con uno
snodo sferico (Fig. 3) per poter agganciare l’arcata in
modo flessibile senza trasmettere movimenti. Lo snodo
sferico deve essere ingrassato prima di fissare la piastra
all’arcata.
Fig.3 Testa cilindro diretto con snodo sferico
Le piastre snodate devono essere ingrassate nei loro punti
mobili prima di essere installate.
Prima di iniziare l’installazione del cilindro è bene
controllare le dimensioni del buco che dovrà contenere il
cilindro stesso.
Il cilindro deve inoltre essere protetto contro la corrosione
e deve essere installato dentro un tubo di protezione. Solo
ad installazione perfettamente funzionante il cilindro
potrà essere eventualmente costipato.
Il posizionamento del cilindro deve rispettare esattamente
le quote indicate nel progetto.
Per la messa a piombo del cilindro e il suo parallelismo
con le guide consigliamo quanto segue:
Diretti centrali normali ad uno sfilante: tirare a piombo il
filo di nylon che si trova all’interno dello stelo e
controllare che esca perfettamente in centro al foro
filettato dello stelo e che sia parallelo alle guide.
Cilindro diretto laterale rapporto 1:1, ad uno sfilamento
(oppure stesso sistema ma con due cilindri). Nei cilindri costruiti in due pezzi la giunta dello stelo è
filettata, mentre la giunta della camicia è a flangia quadra.
OMAR LIFT
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Data/Date 09.2008
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