jurop LC User manual

I
IN NS ST TA AL LL LA AT TI IO ON N, , U US SE E A AN ND D
M
MA AI IN NT TE EN NA AN NC CE E M MA AN NU UA AL L
EN
LC
Rev. 12
10-12-2021
O
OR RI IG GI IN NA AL L I IN NS ST TR RU UC CT TI IO ON NS S

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
2 / 44
Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
2021 –Jurop –Azzano Decimo (PN)
Reproduction, electronic storage and dissemination, even partial, are prohibited.
Jurop reserves the right to modify the products described in this manual without prior notice.
Any product names mentioned herein are the trademarks of their respective owners.

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
3 / 44
Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
Contents
1.
General warnings
pag.
4
1.1
Introduction
4
1.2
Spare part request
4
1.3
Warranty terms and conditions
4
2.
Technical data
pag.
5
2.1
Dimensions
6
2.3
Performances
7
2.4
Noise power
8
2.5
Usage Limitations
8
2.6
Lubrication
8
3.
Safety and accident prevention
pag.
9
3.1
General recommendations
9
3.2
Intended use
9
3.3
Conveyed fluids
9
4.
Installation
pag.
10
4.1
Checking upon receipt
10
4.2
Storing in the warehouse
10
4.3
Handling and installation
10
4.4
Mounting
10
4.5
Vacuum –Pressure line
11
4.6
Cooling system
11
4.7
Overheating alarm (optional)
12
4.8
Vacuum-pressure inverter:
Remote control actuators
12
4.9
Pump mounting - Drive connection
13
5.
Start up
pag.
14
5.1
Starting-up of the pump
14
5.2
Precautions when starting the system
15
5.3
Precautions of use
15
6.
Maintenance
pag.
16
6.1
Ordinary maintenance
16
6.2
Extraordinary maintenance
17
7.
Malfunctions: troubleshooting
pag.
20
8.
Scrapping
pag.
20
9.
Accessories
pag.
21
SPARE PART DATA SHEET –LC 300-420-580 D
24
SPARE PART DATA SHEET –LC 300-420-580, M 540/1000
28
SPARE PART DATA SHEET –LC 300-420-580 HYD
30
SPARE PART DATA SHEET –LC HYD,LUBRICATION PIPE
31
SPARE PART DATA SHEET –LC 750 D
32
SPARE PART DATA SHEET –LC 750 M
34
SPARE PART DATA SHEET –LC 750 HYD
36
SPARE PART DATA SHEET –COOLING WATER PUMP LC
37
SPARE PART DATA SHEET –ACCESSORIES
38

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
4 / 44
Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
1.1. Introduction
• This booklet contains the necessary instructions for a correct
installation, running, use and maintenance of the pump, as well as
some practical suggestions for a safe operating.
• The knowledge of the following pages will grant a long and
trouble-free operation of the pump.
• Following the instructions below contributes to limiting pump repair
expenses by extending its duration, as well as preventing hazardous
situations, thereby increasing its reliability.
• It is recommended to:
−Read, understand and apply carefully the instructions before
running the pump.
−Keep the booklet at hand and have it known to all operators.
• Below is a brief description of the symbols used in this manual.
If these safety rules are not respected, operators can
be injured and the pump or oilers damaged
remarkably.
If these safety rules are not respected, the pump or
system can be damaged.
Suggestions for an environment friendly use of the
pump.
Useful information for an easy usage and
maintenance of the pump.
• The graphic representations and photographs contained in this
manual are there to illustrate the product in the parts that make it up
and in specific operating phases. Though the model shown in the
manual may differ from the one purchased, the operating principle at
the base of the illustrated operating phase is the same.
• Pump has to be fitted with its own tag reporting the following data:
Model, Serial number, Year, Max speed, Max pressure.
Pic. 1.1
1.2. Spare part request
• Use only genuine spare parts for maintenance and repairs. To
order spare parts, provide the following details:
ESEMPIO:
a) The model of the pump (see pump tag):
LC580
b) The serial number of the pump (see pump tag):
J90001
c) A description of the parts (see parts list):
VANE
d) The quantity (see parts list):
n°5 pz
e) The code number of the part (see parts list):
16016 BXN B0
1.3. Warranty terms and conditions
• Compliance with the installation, use and maintenance instructions
provided by this manual is crucial for the recognition of warranty
against defective parts.
1. General warnings

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
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Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
SIDE MOUNTED OIL TANK
•Five-vane rotary pump with liquid cooled housing, suitable even for major duty operating conditions with high volumetric efficiency and low
noise. It has two inlet liquid points on the lower part of its body and four outlet points on the upper part. They do not interfere with the side
mounted oil tank.
•Automatic lubricating pump, accessible from the outside for an easy and quick adjusting. Copper oil piping, complete with sight glass drip oilers
for a continuous check of the lubrication system.
•Side mounted oil tank with level spy hole. The oil tank can be mounted either on the right or left side of the pump to grant an easy oil checking
and filling up. The outside mounting of the oil tank grants a better cooling of the oil itself.
•Heavy duty vanes (asbestos free), radially disposed on the rotor: reduced wear for a long-lasting lifetime. Vanes wear checking ports on the
pump body: they do not interfere with the side mounted oil tank.
•Built-in vacuum-pressure changeover 4-way valve, manually operated: on request, hydraulic or pneumatic operated actuators available.
•Non return valve (clapet) integrated in the pump manifold (LC420-580).
•Swivelling conveyors, made of aluminium alloy: various sizes available.
•Cooling water temperature: a mechanic thermometer can be inserted into one of the outlet holes. A metal capillary operates the pointer that can
be mounted on a visible point near the pump. Delivered on request.
•Exhaust air temperature: the manifold is equipped with a housing for the safety thermostat (intervention temperature: 150° C). Delivered on
request.
•Built-in suction air filter. It can be mounted horizontally whereas the suction hole can be swivelled either towards the right or the left side, for an
easy pump installation and the following cleaning operations and maintenances. The space required to remove the inner cartridge of the suction
filter do not exceed the overall dimensions of the pump. Cleansing agents suction points for the internal wash-up of the pump (recommended in
case sewage has been sucked).
•Drive system:
-Direct with smooth shaft;
-With gear box (ASAE 1 3/8) 540 rpm o 1000 rpm, left rotation;
-With hydraulic motor.
Picture shows: LC 750 D
2. Technical data
VACUUM-PRESSURE
CHANGEOVER
4-WAY VALVE
AUTOMATIC LUBRICATION
COOLING WATER PUMP
(STANDARD EQUIPMENT)
VANES WEAR CHECKING
VACUUM CONTROL
VALVE SET UP

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
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Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
2.1. Dimensions
Versions with hydraulic motor / smooth shaft
PUMP LUBRICATION
HOUSING
CS: tank filling point
OL: oilers
CL: vanes wear checking
A
B
C
D
E
F
G
H
I
L
M
N
O
P
Q
R
S
LC 300
250
290
290
442
601,5
436
285,5
60
86
135
253
205
182
654
76-80
Ø 90
95
LC 420
250
290
290
442
645
469
277,5
60
77
152,5
279
205
249,5
789
80-100
Ø 90
95
LC 580
300
340
400
456
645
469
281,5
60
77
152,5
279
210
212,5
827
80-100
Ø 90
95
LC 750
300
340
400
463
662,5
473
281,5
74
77
200
403,5
210
232,5
931
120
Ø104
110
O HDR
P HDR
LC 300
428
970
LC 420
494
1098
LC 580
462
1141
LC 750
492
1192
Versions with gear box (540 -1000 RPM)
A
B
C
D
E
F
G
H
I
L
M
N
O
P
Q
R
S
T
LC 300
250
290
290
442
601,5
436
285,5
84
86
135
253
83
262
805
76-80
Ø 90
95
45
LC 420
250
290
290
442
645
469
277,5
84
77
152,5
279
83
331
934,5
80-100
Ø 90
95
45
LC 580
300
340
400
456
645
469
281,5
84
77
152,5
279
83
299
979
80-100
Ø 90
95
30
LC 750
300
340
400
463
662,5
473
281,5
81
77
200
403,5
93
319
1017,5
120
Ø104
110
30
PUMP LUBRICATION
CS: tank filling point
OL: oilers
HOUSING
CL: vanes wear checking
GEARBOX
LM: oil level
CM: inlet plug
SM: outlet plug

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
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10-12-2021
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Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
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e-mail: [email protected]
2.2. Performances
PERFORMANCES
LC 300
LC 420
LC 580
LC 750
Rotation speed
LC…D
rpm
1300
1300
1200
1200
LC…M
rpm
540 - 1000
540 - 1000
540 - 1000
540 - 1000
LC…HDR
rpm
1300
1300
1200
1200
Air flow under free air condition (1)
l/min
8500
12000
16330
20000
m³/h
510
720
980
1200
Air flow 60% vacuum rate
l/min
6415
9000
14500
16000
m³/h
385
540
870
960
Air flow 80% vacuum rate
l/min
3450
4833
12180
13100
m³/h
207
290
731
790
Max. vacuum at continuous duty (1)
%
80
80
80
80
Max. vacuum
%
92
92
95
95
Power required at max. vacuum
kW
14
18
17
20.5
Power required at 0.5 relative bar (1.5 abs.)
kW
12
16
29
27
Power required at 1.0 relative bar (2.0 abs.)
kW
17
24
35
35
Max. relative pressure (abs.)
bar
1 (2)
1 (2)
1 (2)
1 (2)
Air flow at 0.5 relative bar (1.5 abs.)
l/min
7500
10830
15500
19400
m³/h
454
650
930
1160
Air flow at 1.0 relative bar (2,0 abs.)
l/min
7000
9830
14400
18300
m³/h
420
590
864
1100
Oil consumption
g/h
200
220
240
250
Oil tank capacity
l
4
4
4
4
Sound pressure level (2)
Vacuum 60%
dB(A)
70
73
72
72
Sound pressure level (2)
Vacuum 90%
dB(A)
73
75
74
75
Circulating pump speed
rpm
2700
2700
2700
2700
Circulating flow rate
l/min
55
55
55
55
Heat exchange rate
Kcal/h
6000
8000
9500
13000
Mass moment of inertia
kgm²
0,15
0,21
0,37
0,81
Weight
LC…D
kg
195
210
232
308
LC…M
kg
200
215
252
328
LC…HDR
kg
205
220
247
323
REFERENCE CONDITIONS
Performances referred to vacuum pump operating at max. speed
Vacuum condition: atmospheric discharge
Actual performance may vary of 5%
Pressure condition: atmospheric suction
Conveyed gas: air
Reference abs. pressure: 1013 mbar
Reference temperature: 20°C
(1) : At nominal speed and room temperature 20°C (68°F)
Functioning in free air
(2) : At nominal speed. Distance: 7m in open field
FLOW / POWER
Data at nominal speed
Model
Free port
Vacuum
Pressure (abs)
20%
40%
60%
70%
80%
90%
1,5 bar
1,8 bar
2,0 bar
m3/h
510
480
444
385
285
207
10
454
435
420
LC 300
l/min
8500
8000
7400
6420
4760
3450
190
7500
7250
7000
kW
8
9
10
11
12
13
14
12
15
17
m3/h
720
670
620
540
400
290
16
650
610
590
LC 420
l/min
12000
11170
10330
9000
6670
4833
270
10830
10170
9830
kW
11
12
14
15
16
16,5
17
16
21
24
m3/h
980
956
921
870
828
731
350
930
888
864
LC 580
l/min
16330
15930
15350
14500
13800
12180
5830
15500
14800
14400
kW
25
22,5
21
20
19
18
17,5
29
33
35
m3/h
1200
1134
1050
960
870
786
360
1164
1134
1100
LC 750
l/min
20000
18900
17500
16000
14500
13100
6000
19400
18900
18300
kW
20.5
20.5
20.5
20.5
20.5
20.5
20.5
27
31.8
35

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
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Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
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e-mail: [email protected]
2.3. Noise power
Lw (A)
Noise power of the only pump at nominal speed.
[dB(A)]
RPM
VACUUM/PRESSURE
LC 300
LC 420
LC 580
LC 750
NOMINAL SPEED
vac 80%
89
91
90
91
Δ press 0,6 bar
100
102
101
101
2.4. Usage limitations
Pump
Max. Speed –Operating speed (RPM)
P2 (bar ABS)
T2 (°C)
T2 - T1 (°C)
M - 540
M - 1000
D -HDR
LC300-LC420
540 –460 rpm
1000 –850 rpm
1300 –1100 rpm
2,0 bar
150°C
130°C
LC580
540 –460 rpm
1000 –850 rpm
1200 –1000 rpm
2,0 bar (*)
150°C
130°C
LC750
540 –460 rpm
1000 –850 rpm
1200 –1000 rpm
2,0 bar (*)
150°C
130°C
P1: absolute pressure during suction
T1: temperature during suction
(*) : conditions not foreseen for continuous duty
P2: absolute pressure during delivery
T2: temperature during delivery
Note: * for pump LC580 with belt drive: P2 = 1,5 bar abs.
2.5. Lubrication
Recommended lubricants SIDE MOUNTED OIL TANK LEVEL: mineral oil
Room Temp.
Viscosity
ENI
ESSO
SHELL
TOTAL
MOBIL
BP
TEXACO
Q8
Sotto 10°C
ISO VG 46
Acer 46
Nuto 46
Morlina S2 B 46
Drosera MS 46
Nuto H 46
Bartran HV 46
Rando HD 46
Shubert 46
Sopra 10°C
ISO VG 150
Acer 150
Nuto 150
Morlina S2 B 150
Drosera MS 150
Nuto H 150
Bartran HV 150
Rando HD 150
Shubert 150
Note: use SAE 15W-40 mineral oil as an alternative to the lubricants written above.
Recommended lubricants GEAR BOX OIL: mineral oil EP
Viscosity
ENI
ESSO
SHELL
TOTAL
MOBIL
BP
TEXACO
Q8
ISO VG 220
Blasia 220
Spartan EP 220
Omala oil 220
Carter EP 220
Mobilgear 630
Energol GR XP 220
Meropa 220
Goya 320
Note: use SAE 80W-90 mineral oil as an alternative to the lubricants written above.

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
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Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
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e-mail: [email protected]
Attention: carefully apply these prescriptions.
3.1. General recommendations
• When transporting the compressor use proper slinging. Store the
compressor in stable places.
• Installation and maintenance must be carried out with the unit
totally disengaged from its drive system and must be performed by
qualified personnel.
• Use adequate clothing (avoid ties, loose sleeves, necklaces and
so on) and suitable protection equipment (gloves, protection glasses,
boots...).
• Before each maintenance operation, stop the pump and restore
the atmospheric pressure.
• Make sure that all the parts of the unit are idle and cool, before
performing any maintenance operation.
• To prevent errors and hazardous situations, establish what each
operator is responsible for in the different maintenance operations.
• Do not start the machine if the protection devices provided for
transmissions are removed. Replace damaged part.
• Final manufacturer must make the transmission inaccessible by
means of a fixed guard or interlocked movable guard.
• Operators working nearby must avoid prolonged exposure to the
noise emitted by the aspirator, if not equipped with the proper ear-
protection devices (IPDs recommended: ear protectors).
• When the pump is running, some parts may reach very high
temperatures (above 70°C). Use all necessary precautions to avoid
contact.
• Avoid accidental suction of solids: solids may be projected at high
speed through the exhaust manifold and cause injures. A filter must be
mounted on the suction line (Mesh 55).
• Pressure relief valve: point the air flux away from the operators.
• Do not use the aspirator over its designed limits: the machine may
be damage and the operator may be injured.
Do not exceed the power supply parameters
indicated in the technical tables (see par. 2.3-2.5).
• Based on the final use of the decompressor, the insertion in the
housing machine and the typology of the same, the designer of the
housing machine must apply safety signals (pictograms) to warn the
operator on the risk still present. These pictograms essentially refer to
three categories:
−Signals prescribing the use of Individual Protection Devices (IPDs)
such as, in this case, the use of gloves and ear protectors.
−Signals indicating to pay particular attention to the dangers related
to the machine’s components, such as: risk of dragging in the
transmission equipment and contact with hot surfaces.
−Signals indicating specific parts of the machine for an easier
identification, such as: greasing points, oil tanks, etc.
3.2. Intended use
•The vacuum pumps LC are designed to convey filtered air into
systems for the vacuum production or for the suction of powders or
liquid wastes. Any other usage shall be considered improper.
• Do not sack toxic substances and inflammable or explosive
gasses, since the internal components of the pump may reach high
temperatures.
Avoid suction of toxic (poisonous) explosive or
flammable gasses because internal components
may reach high temperatures.
• Liquids or solids infiltrations can seriously damage the pump.
Attention: liquids or solids infiltrations can
seriously damage the pump.
• Do not run the pump over its designed operating limits (see par.
2.5): it may break and transmission can be damaged.
3.3. Conveyed fluids
• LC pumps are suitable for conveying filtered air. Before conveying
other kind of gases, verify compatibility with pump’s characteristics.
• The machine was not designed and built to operate in
environments with potentially explosive atmosphere (outdoor or
indoor).
• Please contact JUROP’s Technical dept. if necessary.
3. Safety and accident prevention

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
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10-12-2021
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Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
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e-mail: [email protected]
Pic. 4.1
01
Water recycle pump
08
Lubricating oil tank
02
Venting valve on pump housing
09
Non return valve (clapet valve)
03
Venting valve on water recycle p.
10
Oil tank emptying port
04
Cooling water inlet
11
Oilers
05
Cooling water outlet
12
Self-lubricating pump
06
Vanes check-port
13
Vacuum / pressure change valve
07
Oil filling port
4.1. Checking upon receipt
• When the goods are delivered, make sure that all parts listed on
the delivery note are in perfect condition and have suffered no damage
during shipping.
• Make sure the vacuum pump has its identification plate affixed on
the front cover. Pumps without such identification are to be considered
anonymous and potentially dangerous: in such an event, they must not
be used, otherwise the manufacturer will be deemed free from any
liability whatsoever.
4.2. Storing in the warehouse
• If the pump will not be installed inside a short time after delivery:
−Remove the guards from the ports and spray a film of protective oil
over the inner surfaces of the body, rotors and sides. Then attach
again the guards;
−Store in a closed and dry place. Renew the preserving oil
periodically.
• To temporarily store a used pump, follow the instructions below:
−Thoroughly clean the pump.
−Equip the pump with suitable anti-corrosion protection.
4.3. Handling and installation
•Before each movement, verify that the lifting equipment has a
suitable capacity (check the weight of the decompressor, possibly
showed in this manual, in the paragraph 2.1).
• Do not lift the packaging or the machine when moving more than
50 cm from the ground. Proceed with the final lifting only near the
installation point.
• Harness the machine with suitable straps / chains near the main
body, paying attention to the position of the mass centre of gravity to
ensure the load stability.
Warning: do not stand under the machine when it
is lifted during the installation.
4.4. Mounting
• The pump must be assembled for an easy access for maintenance
operations and secured rigidly to a frame or levelled base (max. 3°
slant to the horizontal plane. See Fig. 4.1). The base must be such as
to avoid vibrations, bending or deformation.
• Where possible, we recommend the use of vibration dampers
between the support points of the machine and the base housing it.
• Leave enough space around the pump to allow the free circulation
of air for cooling; avoid exposure to dirt and debris.
• Prepare the necessary space for an easy access to the lubrication
check-points (tank level and gear box, oilers) and to the oil tank filling
port, the four-way manifold handle, and the vane wear inspection ports.
• Provide for suitable manoeuvring spaces of the inverter lever. The
control lever has two possible switching positions well defined by the
latches and numbers reported on the fusion. It is directly connected to
the internal diverter tang of the inverter, making it very intuitive: 90° of
the lever switching corresponds to 90° of the inverter switching.
• Based on the functionality of the system which will house the
decompressor, the designer of the end machine, must:
−Properly signal the functionality of the inverter according to the
position of the manual operating lever or of the pneumatic actuator
or of the hydraulic one.
−Install suitable pressure and / or vacuum restrainer valves near the
inlet and outlet points of the machine.
• In case of LC with hydraulic motor, provide the necessary space to
disassemble the motor itself and proceed with joint lubrication.
• In the event that the decompressor is electrically isolated, connect
it to the ground or make it equipotential with the housing machine.
Check that the paint does not prevent its passage.
• The machine expels gas during delivery at temperatures that can
reach the maximum permitted values for operation, with its lubricating
oil in suspension. Oil consumption is stated in paragraph 2.3, the
quantity of consumed oil corresponds to the quantity of oil emitted at
delivery.
• The installer will have to provide an appropriate delivery oil
separator (such as the JUROP cyclone silencer-oil separator supplied
on request) and/or direct the flow to the drain in an area that is not at
risk.
• The belt transmission guard of the coolant recirculation pump
supplied by Jurop is partial and must be completed/integrated with the
guard of the main transmission provided by the installer. If the
transmissions are accessible by the operator, protect them with a fixed
or interlocked guard and signal them with appropriate pictograms.
4. Installation

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
11 / 44
Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
4.5. Vacuum - pressure line
• To avoid accidental suction of liquids inside the pump, install a
primary (pos. 1) and a secondary flow shutoffs (pos. 2). If necessary,
install also a suction filter (pos. 4) to protect from solids infiltration.
• The exhaust silencer (pos. 6) is designed to reduce the noise level
and to separate the oil mist coming out from the pump outlet port. The
separator must be periodically drained from oil and condensate
accumulated in the separator during the normal pump functioning.
• The diameter of the vacuum/pressure line pipes must be properly
dimensioned to the pump flow and, in any case, larger than the
diameter of the ports.
• The pipes weight must not solicit the body of the pump. Use high
temperature resistant rubber connections.
• Before mounting the vacuum line to the pump, remove the port
protections. Pipes and all line components must be clean.
• Avoid restrictions and tight curves as much as possible if not
strictly necessary.
• Exhaust pipes can reach high temperatures. Hence, they must be
properly isolated.
Pic. 4.2
01
Primary shutoff
06
Silencer –oil separator
02
Secondary shutoff
07
Circulating pump
03
Vacuum relief valve
08
Air-water heat exchanger
04
Suction filter
09
Expansion tank
05
Overpressure safety valve
10
Exchanger inlet port
•Safety valves:
−Overpressure safety valve (pos. 5): mount it close to the pump.
The valve flow must prevent the LC pump from exceeding the
absolute pressure of 2.0 bars or the maximum pressure allowed by
the system. Do not apply gate valves on the line;
−Vacuum control valve (pos. 6): install if necessary to limit the
vacuum rate of the system.
4.6. Cooling system
• Please follow the outline on figure 4.2 to make the connection.
• The cooling system is composed of:
−Centrifugal recycle pump;
−Heat exchanger with electric fans operated by a thermostat;
−Expansion tank with an atmospheric pressure vent system.
• The heat exchanger must dissipate the heat power indicated in
par. 2.3. The Fig. 4.3 shows the characteristic curve “Flow – Head” of
the recycle pump.
• The circuit shall be vented to ambient pressure.
• Fill the system by venting any air pockets.
• The cooling liquid temperature must not exceed 60° C. The airflow
generated by the exchanger fans must be kept free of obstacles.
• We recommend using a mixture of water and glycol (min 30%) as
coolant and, in any case, in percentage compatible with the expected
minimum temperatures to which the system will be subjected.
• In the event of draining and replacing the coolant, dispose of it
according to the regulations in force.
Pic. 4.3
CIRCULATING PUMP
(Figure shows: water pump left)
2
1
3
4
5
7
6
7
9
8
10

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Via Crosera n° 50
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4.7. Overheating alarm (optional)
• The vacuum pump can be equipped at the request of thermostat
sensor.
• Overheating alarm is strongly recommended in the following
cases:
−Operations close to the use limits.
−Under pressure operations.
−Not well defined or monitored operation conditions.
• The alarm (available upon request) is composed of a blinking light
and a warning buzzer that have to be connected to the thermostat
(sensor). It is available at 12V or 24V.
• Consider the thermostat characteristics (See Fig. 4.4).
−Voltage from 6V to 24V with CC, from 6V to 12V with AC.
−Maximum power: 3W.
• When threshold temperature is reached the alarm system is
enabled and a gate valve (along vacuum line) is opened.
• It has to be mounted in a protected position in order to keep it free
from water and other damaging media. Prepare the necessary
connections for the electrical feeding.
• If the box supplied as an accessory is not used, make a check
circuit as illustrated in Fig. 4.4.
• Overheating can seize the vacuum pump, causing a damage also
in the drive line. Stop the pump for cooling or drive it at free ports
conditions (with the suction valves fully opened) to let it cool down
properly. The pump can be again operated only when the alarm is
turned off after cooling.
• Check the muffler cleanliness. Obstructions may cause
overheating.
Attention: overheating can seize the vacuum
pump, causing a damage also in the drive line.
Pic. 4.4
4.8. Vacuum-pressure inverter: remote control
actuators
• A specific design of the vacuum-pressure diverter available on
request enables the application of a pneumatic or hydraulic angular
actuator (90°).
• See the exploded view at the end of the manual for spare parts.
Pneumatic actuator
Hydraulic actuator
Fluid
Filtered, dried compressed
air
Hydraulic oil ISO-L-HM
Filtration
ISO 8573-1 classe 4
(15 micron)
ISO 4406 21/19/16
Temperature
°C
-20 ÷ +80
-20 ÷ +80
Rated pressure
bar
5.6
150
Maximum pressure
bar
8.4
200
Supply holes
G 1/4
G 1/8
Hydraulic actuator installation
• Adjust movement speed using the two built-in valves.
• Use a closed-centre distributor or apply a block valve.
Pneumatic actuator installation
• Adjust movement speed by applying two unidirectional flow control
valves.
For both actuators
• Adjust speed: full rotation should not take less than 1 second.
• Fluid filtration: ensure a level equal to or greater than the
recommended value.
• In the event of a (hydraulic or pneumatic) supply failure, the
suction unit inverter will remain in the same position it was when the
failure occurred.
Pic. 4.5
Maintenance
• The diverter is adjusted before shipment and does not usually
require further adjustments.
•Diverter lubrication:
−Use NLGI 2 Lithium grease. Quantity: 80-100 grams for 1000
working cycles.
−A bleeder hole covered by a filter is preventing the hole to overfill.
Clean the filter whenever clogged.
•Hydraulic actuator: the control valves are equipped with an internal
metal filter. Disassemble and clean if movement stops.
• Pneumatic actuator: for non-dried air, use temperature 0 ÷ +80°C.
BATTERY
TERMOSTAT
BATT.+
TERM.+
CHECK
PUSH-BUTTON
OVERHEATING
WARNING DEVICE
SPEED ADJUSTMENT
INDICATOR POSITION
(ACTUATOR AT END OF STROKE)

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• The following figure shows a possible schematic view of a correct
hydraulic connection.
Pic. 4.6
•The following figure shows a possible schematic view of a
pneumatic connection.
Pic. 4.7
• In case of interruption of the pneumatic or hydraulic supply, the
inverter of the suction unit remains in the same position it was when the
failure occurred.
4.9. Pump mounting - Drive connection
•For the machines of this series, the allowed power transmissions
are:
−Direct transmission (e.g.: from agricultural cardan shaft);
−Oil hydraulic transmission (e.g.: hydraulic motor).
•Protect with a fixed or interlocked guard and signal with
pictograms the power transmission chosen and applied by the final
installer, if there is the possibility that the operator will come into
contact during handling.
A) Cardan shaft drive
• Use telescopic cardan shafts.
• In order to achieve a uniform motion of the driven shaft, the
following requirements must be met (see Fig. 4.6):
−Equal working angle αand α1 of both couplings.
−The internal fork joints must be coplanar.
−Both driven and driving shafts must be coplanar.
Pic. 4.8
•It is also recommended working with limited articulated joint angles
(max 15° at 1000 rpm and max 11° at 1300 rpm) and disengaging the
transmission for those operations requiring great angles (steering or
lifting).
Follow the rotation direction as indicated on the
front flange. Follow the instructions of the cardan
shaft’s manufacturer.
• Use the cardan guard supplied with the pump, by fixing it to the
pump itself.
Use the cardan guard supplied with the pump, by
fixing it to the pump itself. In any case, the
installation, by the final installer, must comply
with the current EC accident prevention
regulations and must be compatible with the
geometry of the protection cap supplied with the
machine.
• The protection must not be removed; in case of removal, it is the
responsibility of the final installer to provide for suitable guards
according to the assembly.
• It is the responsibility of the final installer to provide for suitable
guards, in presence of transmission shafts exposed during normal
operation.
B) Belt drive
Pic.4.9
• Install a suitable pulley on the smooth shaft as close as possible to
the pump: max 35 mm.
• Apply an adequate belt tension (see manufacturer’s data). Max
3000N.
• Do not use driven or driving pulleys with a pitch diameter inferior
to 180 mm. Small pulleys require a high belt tension which may cause
premature wear to the bearing or transmission troubleshooting.
KEEP AXELS PARALLEL
ALINGN PULLEY GROVES
AND BELTS
CHECK BELT TENSION
DP MIN
TMAX

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3
5
4
6
1
2
• A limited speed ratio allows a longer belts life while reducing
stress on the shafts. When possible, prefer:
−Pulleys with a pitch diameter bigger than the one indicated;
−Motors or power take-offs with a speed similar to the one of the
pump.
LC 300-420
LC 580-750
Max. Speed
1300 rpm
1200 rpm
Max. Pressure
2 bar abs
1,5 bar abs
T. Max.
3000 N
3500 N
Drive min. pulley p. diam
180 mm
180 mm
Grooves
3
3
Belts
SPB
XPB
C) Hydraulic drive
LC 300
LC 420
LC 580-750
Displacement
61 cc/rev
72 cc/rev
108 cc/rev
Operating pressure (max. vac.)
125 bar
135 bar
140 bar
Operating pressure (1 rel. bar)
150 bar
175 bar
190 bar
Flow
83 l/min
98 l/min
136 l/min
Max pressure draining line
5 bar
5 bar
5 bar
Max. pressure motor exhaust
5 bar
5 bar
5 bar
Max pressure
200 bar
200 bar
220 bar
• Fluid: mineral oil for hydraulic systems in compliance with ISO/DIN.
Temperature
Optimum viscosity ale
Max. viscosity allowed
-20 / +80 °C
12 –100 cSt
750 cSt
• Filtration: class 19/16 contamination according to ISO 4406 to be
obtained with a ßx = 75 filter.
• Check circuit connections: they must be applied in the same
rotation direction as that indicated by the arrow on the pump front
flange.
Pic. 4.10
• Draining: connect directly to the tank above the maximum oil
level. Operating without draining line may damage the motor.
• Distributor: open-centre distributor in central idle position
(vacuum pump off). It must be equipped with an adjustable
overpressure safety valve.
• Motor pipeline: outlet pipe must not be of a smaller diameter than
that of the inlet port. Inlet pipes always have a diameter smaller than
outlet pipes. Choose preferably flexible pipes to avoid vibration
transmission.
• Tank: with suction pipe and return separated by baffles. If
necessary, use a heat exchanger to avoid oil heating above 70-80°C
and protect it from extreme pressure with a pressure relief valve.
Minimum approximate capacity: as twice as the circulation flow.
• Starting-up: be sure that the system is well cleaned and pour oil
into the tank and into the motor housing (necessary to lubricate the
internal bearings).
• Vent the circuit and adjust the overpressure safety valve to the
lowest possible value.
• Check the oil tank level.
• Increase pressure and rotation speed until operating values are
reached.
Pic. 4.11
1
Hdr pump
4
Oil filter
2
Distributor
5 *
Heat exchanger
3
Hdr motor
6 *
Safety valve
* optional components
• The machine/system manufacturer is responsible for dimensioning
the lines.
The machine/system manufacturer is responsible
for dimensioning the lines.
5.1. Starting-up of the pump
Lubrication
• Check oil levels in gearbox and side mounted tank.
• Check the oil level in the gear box (if the pomp is provided with it).
• In order to choose the most suitable oil, see paragraph 2.6.
Cooling
• Unscrew the vent valves on the housing and recycling pump, pour
the cooling fluid through the port near the exchanger.
• Screw the vent valves and start running the cooling system in
order to expel the air bubbles inside it. Then, adjust the level by filling
up the expansion tank on the exchanger: it must be half filled
(approximately).
5. Start up
DRAINING
PORT

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• The cooling system we designed has a capacity of 25-30 litres.
Use a mixture of demineralised water and antifreeze liquid at a
concentration suitable to room temperature (usually between 25 and
50%).
Carefully vent the cooling circuit with the
recycling pump stopped.
Vacuum line
• Open all valves of the vacuum-pressure system.
• Open all gate valves and remove any possible obstacle from the
line.
5.2. Precautions when starting the system
• Check oil levels in gearbox and side mounted tank.
• Check that all protection devices are correctly installed.
• Check that there are no obstacles in the vacuum line.
• Check rotation direction: open all system valves and start running
slowly.
Do not rotate in the wrong direction: this may
damage the vacuum pump. Follow the arrow
indicated on the front flange.
• Check which position of the four-way integrated valve lever allows
vacuum or pressure functioning.
• Close the valve and increase vacuum rate (or operating pressure).
• Check that the lubricating pump works properly. Oil must regularly
drip into the oilers. Typically (with degree of vacuum > 50%), 35-40
drops/min (at maximum speed).
• Check loading and operating speed for vibrations or unusual
noises.
This vacuum pump is designed to work at
maximum speed, but for longer operating we
recommend the pump be run at working speed
(see par. 2.5).
• Prepare adequately transmission.
5.3. Operating precautions
• Run the vacuum pump at a room temperature of -20°C e +40°C.
• Do not make the vacuum pump overheat: maximum air
temperature on exhaust (or delivery) side: 150°C.
• Do not operate the pump without lubrication: it may cause quick
wear and possible breakdown of vanes.
• Do not start running the pump under load: this may damage the
drive system or the hydraulic motor.
• Check the rotation speed: it must never exceed the operating
limits.
• Do not accidentally operate the pump in the wrong direction: it may
break the vanes.
• Do not convey the exceeding delivery outlet towards the suction
port, otherwise it will sack warm gas.
• Do not convey the exceeding delivery outlet towards the suction
port, otherwise it will sack warm gas.
• Control the air flow by adjusting the rotation speed: do not use the
pressure relief valve to discharge the exceeding flow.
• Once the needed vacuum rate has been reached, we recommend
reducing the vacuum pump speed to its working speed (see par. 2.5):
this allows keeping the achieved vacuum/pressure rate constant. The
pump speed can also be reduced to values lower than the working
speed during the tank discharging phase (with the 4-way valve in
pressure mode) without increasing the draining time.
• Thus, exhaust temperature is reduced, vane durability is increased
and both oil consumption and power absorption are reduced.
Once the needed vacuum rate has been reached,
we recommend reducing the vacuum pump
speed to its working speed.
• After operation in dusty environments, after accidental sucking of
liquids inside the pump or before a long inoperativity period it is
recommended to wash the pump inside according to the following
procedure:
1. Before washing the pump, be sure that it has cooled down. To
obtain this in a short time, it is possible to run the pump for a few
minutes at zero vacuum conditions, or stop it at all;
Attention: Do not carry out this operation on very
hot pumps (for example after a working day) until
they have cooled down.
2. Use 1-2 liters of water mixed with a non-flammable detergent. We
suggest some product like Henkel Bonderite C-NE 5225: 5%
concentration in water. This detergent grants a good protection
against rust and oxidation.
3. Use one of the openings placed in the vacuum line (closet on the
pump) to suck some water mixed with detergent.
4. Start the pump at low speed leaving opened all the suction valves
in the tank, in order to keep low the vacuum rate (max vac. 10-
20%). Let the detergent mix entering the pump very slowly.
5. The detergent mix stays suspended in the pump inside, before
being expelled through the exhaust silencer.
6. After keeping the pump speed for a while to make the product
reaching the internal parts, it is necessary to dry the pump
preventing oxidation. When the detergent mix is finished, continue
running the pump at the lo west possible vacuum rate for a few
minutes, then close venting and suction valves up to 50-60%
maximum, for a couple of minutes. With this operation the pump will
dry from the heated air and protected from the chemical attack of
the detergent.
7. Washing the pump with this detergent guarantees a protection after
some days of inoperativity. If the pump is not used for more than
two weeks, after having washed and dried the inner parts as
described above, it is recommended to suck slowly 200 cc anti-rust
and water-repellent protective oil (or, if not available, a very fluid
gear oil).
Attention: do not carry out also this operation on
very hot pumps (for example after a working day)
until they have cooled down.

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Dispose of used oil in accordance with the
current regulations.
In case the exhaust line cannot be disconnected,
drain the liquids accumulated in the separator of
the exhaust silencer.
• After long periods of inactivity, introduce some quantity of oil
through the suction connection before starting the pump.
Recommended operation in case of temperatures close or below 0°C
degrees.
•If the decompressor operates in vacuum or under pressure with a
capacity environment (such as a cistern) and is configured in the “FL”
flanged version (without manifold with 4-way valve and non-return vale),
it is advisable to intercept the working line of the machine when it is
stopped, to prevent contrary rotations until the rebalancing of the
pressures. The interception can take place through a controlled valve or
an automatic unidirectional valve (swing valve).
6.1. Ordinary maintenance
•Any interventions must be performed when the machine is cold, stopped and switched off.
• Installation and maintenance must be operated only by qualified personnel wearing the proper clothes and the necessary tools as well as
protection devices.
• Use suitable protection equipment (gloves, protection glasses, boots...)
• In the following table summarizes the main controls to be performed and the frequency of intervention.
Operating condition
Maintenance Area
Check
8H
50H
500H
1500H
OPERATING
Vacuum line
Check pressure relief valve condition
Operating pressure
Transmission / Pump
Rotation speed
Lubrication: dripping into oilers
Sound pressure level
STANDSTILL
Vacuum line
Clean filter and vacuum line shutoff
4-way changeover valve: check and lubricate
Drain the oil gathered in the exhaust separator
Pump
Clean oilers glasses
Check vanes wear
Side mounted tank oil level
Gear box oil level
Gear box oil change (1)
Cooling system venting
Pump’s inner washing (2)
Overall
Greasing
Check cardan shaft drive
Chack transmission pulley
Cooling water pump belts tensioning
Swing valve wear check
(1) In order to choose the most suitable oil, see paragraph 2.6. (2) After operation
in dusty environments, after accidental sucking of liquids inside the pump or before a
long inoperativity period it is recommended to wash the pump inside according to the
procedure described at paragraph 5.2.
Oil level in tank check
• Check dripping into the oilers.
• Be sure it is regular (about 40 drops/min at max. speed, with
degree of vacuum > 50%) to grant a correct lubrication of the pump. At
lower speeds, the number of drops must be directly proportional.
If the pump is run without lubrication, the internal
components may quickly damaged due to
overheating. Stop the vacuum pump and check
the oil level and the lubricating pump.
Checking the side mounted oil tank level
• Before starting the machine, check the lubricating oil level.
• Do not run the pump with oil level under the minimum level: that
may lead to dry functioning and cause serious damages.
• See paragraph 2.3 for the oil consumption of each model.
• Top up with fresh and clean oil only; use the oil required in
paragraph 2.6 or equivalent.
• The oil must be topped-up with the machine stopped and cold.
Do not re-use the exhausted oil gathered on the
bottom of the exhaust silencer.
6. Maintenance

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• Apply the safety requirements indicated in chapter “Safety and
accident prevention” before topping-up.
• Tank capacity: 4l.
Check the oil level in the gearbox
• The oil must be topped-up with the machine stopped and cold.
• Apply the safety requirements indicated in chapter “Safety and
accident prevention” before topping-up.
• The oil level in the gearbox must reach the side discharge hole.
• For the replacement, drain the oil from the gearbox through the
lower discharge plug and top-up through the upper filling plug until it
comes out of the side discharge hole.
Dispose of exhausted oil as provided by current
specification.
• See the table in paragraph 6.1 for the frequency with which to
replace the oil.
• Top up with fresh and clean oil only; use the oil required in
paragraph 2.6 or equivalent.
• During the oil replacement, also replace the discharge plug
washer.
Checking the vanes wear LC 300-420-750
• Unscrew the vanes wear check-plug on the housing (pos. CL).
• Turn the shaft until you see the vane.
• The vanes should slide to the bottom of the seat due to gravity:
check they really do.
• Insert a rod of 6 mm Ø with its conic end towards the pump (rod
supplied with pump).
• Turn the shift manually and touch the outside diameter of the rotor
with the checking rod, mark it a first time. Keep turning the shift till the
rod falls inside a vane groove. Mark it again and measure the gap
between the two marks.
Pic. 6.1
• If this gap exceeds 10 mm, then the vanes must be replaced.
• At the end of this procedure, do not forget to replace the plug.
• Replace all vanes at the same time.
Replace the vanes when their wear exceeds 10
mm (L –L min): they may break. Replace all vanes
at the same time.
Checking the vanes wear LC580
• Unscrew the vanes wear check-plug on the front flange (pos. CL).
• Turn the shaft until you see the vane.
• The vanes should slide to the bottom of the seat due to gravity:
check they really do.
• Replace the vanes when their wear exceeds 10 m\m (L –L min):
they may break.
• At the end of this procedure, do not forget to replace the plug.
• Replace all vanes at the same time.
Pic. 6.2
Replace the vanes when their wear exceeds 10
m\m (L –L min): they may break. Replace all
vanes at the same time.
6.2. Extraordinary maintenance
• Except for the cases described below, extraordinary maintenance
on a LC must be carried out by specialized personnel only; otherwise
the guarantee will be invalidated.
• All extraordinary maintenance interventions must be carried out
when the machine is cold, stopped and switched off. Implement the
safety instructions reported in the “Safety and accident prevention”
Chapter, before performing any maintenance operation.
Follow the safety prescriptions as described in
Cap. “Safety and accident prevention”.
Adjusting the 4-way valve
Pic. 6.3

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• For pumps equipped with handle for manual operation or hydraulic
actuator.
• Adjust the screws to avoid the valve blocking in its seat (see Fig.
6.3).
Attention: do not exceed with the adjustment:
possible vacuum loss.
Adjusting the pneumatically operated 4-way valve
Pic. 6.4
• In case of reduced performance or difficult rotation of the valve in
its seat, it is necessary to adjust the operating play.
• Unscrew the 4 screws M8x16 which fasten the top cover (7) to the
inferior support (2).
• Clean the inner part from the lubricant.
• “Mark” the initial position of the cock (1). When mounting the cock
back in place, it must be in the same position.
• Turn the valve until one of the cock regulation ferrules (5) coincides
with one of the threaded holes on the inferior flange (2). Block
temporarily the nut ferrule with a screw.
• Hold the valve in place with a 17 mm spanner and loosen the nut
(4) over the ferrule by ½ - ¾ turn with a 36 mm spanner.
Pic. 6.5
• Valve adjustment: turn the valve clockwise by 1/8 turn (45°) in
order to lower it (in case of excessive play between the valve and its
seat and of reduced performance) or anticlockwise by 1/8 turn (45°) to
raise it (in case of difficult rotation of the valve in its seat).
• Hold the valve in place with the spanner and fasten the nut (P4)
above the ferrule.
• Remove the screw which temporarily blocks the ferrule and check
for the correct rotation of the valve by adjusting the shaft frame. Repeat
the valve adjustment, if necessary.
Pic. 6.5
Attenzione: get the valve back into the previously
“marked” position. Otherwise, the valve may
work improperly.
• The valve - in both its end stroke positions - must separate the air
flow sucked from the pump outlet air. The pump may be started in
order to check for the proper functioning.
• Lubricate the areas near the ferrule in order to guarantee the
lubrication of parts undergoing wear.
• Set the top cover back into place. Do not forget the OR-Ring (6).
Fasten the 4 screws.
Replacing the vanes
• Remove the vacuum pump from its bearing frame and wash it
before disassembling.
Pic. 6.7
• Drain the cooling liquid from the pump housing.
• Remove the water pump cover (1) and the carter (2).
• Disconnect lubricating pipes (3).
• Remove the lubricating pump (4).
CORRECT POSITION
POSITION INCORRECT

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-
+
½ turn
40-80 g/h
• Remove the screws (5) fixing the rear flange (6) and use the two
threaded holes to remove the flange –bearing –seal housing. If
necessary, hold the rotor by inserting a wooden block, protecting the
internal bearings from damage.
• Remove the bearing from the rear flange and replace the seal if
broken.
• Lubricate with oil the new vanes before inserting those inside each
groove of the rotor.
• Reinstall all the components in the following order: rear flange, seal
ring, bearing, compensation ring, gasket and flange with lubricating
pump (we recommend to fit correctly the pivot-key on the shaft groove).
• Tighten the nuts (pos. F) by means of a dynamometric wrench
adjusted at 88 Nm.
• Refill the cooling system and re-install the pipeline.
Do not damage components during assembly by
forcing them exceedingly.
• Do not flip the seal ring during rotation of the shaft. Do not leave
foreign objects inside the pump.
Adjusting the self-lubricating pump
• The automatic lubricating pump is adjusted by the manufacturer
before the shipping.
Pic. 6.8
• If consumption noticeably differs from the indicated value, adjust it
as follows:
−Remove the upper protection cover;
−Using a screwdriver and a 10 mm wrench, adjust the adjusting
screw (K). Close the nut and remount the upper protection cover;
−It is advisable to turn the screw of ¼ of turn and verify the actual
consumption.
Do not reduce oil consumption below the value
indicated in par. 2.3 (for functioning at speeds
different from the maximum, flow is proportionate
to rotating speed).
• ½ turn of the adjusting screw causes a variation in the flow of
approximately 40 - 80 g/h, depending on using conditions.
Replacing gear box components
• The pump with a 540 rpm gear box can be transformed into a
pump with a 1000 rpm gear box (and vice versa):
−Take down the gear box as illustrated. Remove also the drive
shaft’s pinion;
−Install the new pinion closing the nut;
−Mount the gear wheel including bearings and seals on the front
cover, properly aligning components. This housing may now be
installed in the gear box: fit the bearing in the internal housing on
the flange;
−Properly engage gears, replace the cover’s gaskets to complete
gear replacement. Insert the parallel pin, which maintains the
correct alignment;
• See picture below.
Cooling water pump belt tensioning
• To correctly tension the belt (1), after checking the alignment of
the two pulleys (3-4), loosen the screws (6) and the hexagon nut (7).
• Adjust the screw (8) that acts on the recirculation pump movement
(2) along the vertical axis.
• Once the belt is correctly tensioned (1), tighten the nut (7) and
screws (6).
• See the exploded view at the end of the manual for spare parts.
Pic. 6.9
540 RPM
1000 RPM
F = 0,5 kg
f = 6 mm

INSTALLATION,USE AND MAINTENANCE MANUAL –LC
REV.12
10-12-2021
20 / 44
Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL.[phone] FAX.[phone]
http://www.jurop.it
e-mail: [email protected]
PROBLEMS
THE VACUUM PUMP OVERHEATS
Cause
Solution
• Insufficient or absent lubrication
• Verify oil and rings. Check oil pump efficiency
• Low tank oil level
• Fill tank with oil
• Excessive rotation speed
• Reduce rpm to the prescribed working speed
• Prolonged functioning at max vacuum rate
• Reduce vacuum rate
• Insufficient cooling
• Check oil pump efficiency. Bleed the system with care. Check heat exchanger
efficiency
• Vacuum and/or exhaust line of insufficient diameter
• Check dimensioning
THE VACUUM PUMP DOES NOT ROTATE
Cause
Solution
• Broken vanes:
• Clean inner chambers, replace vanes
- due to infiltrated solids
• Check the secondary shutoff and filters of the suction line
- due to insufficient lubrication
• Check the oil pump
• Power transmission breakdown
• Check and replace the damaged parts
• Ice inside the pump (during the cold season)
• Remove ice and slowly start running it. Avoid suction of water
REDUCED PERFORMANCES
Cause
Solution
• Four way changeover valve in idle position
• Move the lever to vacuum or pressure mode end stroke
• Four way changeover valve not correctly registered
• Adjust the functioning play and lubricate
• Worn vanes
• Replace vanes
• The non-return valve leaks
• Clean or replace if necessary
• Worn seal rings
• Replace
• Tank gate valves or gaskets leak
• Replace damaged or worn parts
• Tank connection pipes leak or are obstructed
• Replace damaged pipes
• Obstructed primary shutoff or suction filter
• Remove and clean
• Encrusted exhaust port
• Remove and clean
• Vacuum line components are too small dimensioned
• Verify dimensions for pump maximum performances
• Obstructed rubber couplings
• Replace
UNUSUAL OIL CONSUMPTION
Cause
Solution
• Insufficient or absent lubrication
• Check and adjust the lubricating pump
• Recycling materials allow reducing the environmental impact and
respecting the environment.
• Before scrapping the machine, the following materials need to be
separated and suitably disposed of:
Do not dispose of in the environment. Dispose of
in compliance with the standards in force.
Material
Cast Iron
Steel
Alluminum
Copper
Bronze
Rubber
Vane
Oil
Gasket
Plastic
LC 300
83,1 %
12,4 %
0,7 %
0,2 %
0,2 %
0,1 %
0,6 %
2,1 %
0,1 %
0,4 %
LC 420
89,0 %
8,0 %
0,6 %
0,2 %
0,1 %
0,1 %
0,8 %
0,5 %
0,4 %
0,2 %
LC 580
88,0 %
9,0 %
0,5 %
0,2 %
0,1 %
0,1 %
0,9 %
0,4 %
0,4 %
0,2 %
LC 750
93,0 %
5,0 %
0,4 %
0,2 %
0,1 %
0,1 %
0,6 %
0,3 %
0,3 %
0,2 %
8. Scrapping
7. Malfunctions: troubleshooting