Gardner Denver Elmo Rietschle V-VC 40 User manual

V
Edition: 1.3 ·4.7.2018 ·BA 231-EN
Original Operating Instructions
V-VC 40 | 50 | 75 | 100 | 150
Vacuum pump
V-Serie
V-Series
Drehschieber
Rotary Vane

2|www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Table of contents
Table of contents
1 Foreword................................................................... 4
1.1 Principles ................................................................... 4
1.2 Target group ................................................................. 4
1.3 Supplier documentation and accompanying documents .............................. 4
1.4 Abbreviations ................................................................ 4
1.5 Directives, standards, laws ..................................................... 4
1.6 Symbols and meaning ......................................................... 5
1.7 Technical terms and meaning ................................................... 5
1.8 Copyright ................................................................... 5
2 Safety ..................................................................... 6
2.1 Warning instruction markings ................................................... 6
2.2 General..................................................................... 6
2.3 Designated use .............................................................. 7
2.4 Unacceptable operating modes.................................................. 7
2.5 Personal qualifications and training ............................................... 8
2.6 Safety-conscious work ........................................................ 8
2.7 Safety notes for the operator .................................................... 8
2.8 Safety instructions for installing, commissioning and maintenance ...................... 9
2.9 Guarantee conditions.......................................................... 9
3 Transport, storage and disposal................................................ 10
3.1 Transportation ............................................................... 10
3.1.1 Unpack and check the delivery condition .................................. 10
3.1.2 Lifting and transporting................................................. 10
3.2 Storage..................................................................... 11
3.2.1 Ambient conditions for storage .......................................... 11
3.3 Disposal .................................................................... 11
4 Set up and operation ......................................................... 12
4.1 Setup ...................................................................... 12
4.1.1 Data plate ........................................................... 13
4.2 Description.................................................................. 13
4.3 Areas of application ........................................................... 13
5 Installation ................................................................. 14
5.1 Preparing for installation ....................................................... 14
5.2 Installation .................................................................. 14
5.3 Connecting pipes............................................................. 15
5.4 Filling with lubricating oil ....................................................... 15
5.5 Connecting the motor ......................................................... 16
6 Commissioning and decommissioning .......................................... 17
6.1 Commissioning .............................................................. 17
6.1.1 Checking the rotation direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Decommissioning/ storing ...................................................... 18
6.3 Re-commissioning ............................................................ 18

3
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Table of contents
7 Maintenance and repair....................................................... 19
7.1 Ensuring operational safety ..................................................... 19
7.2 Maintenance work ............................................................ 19
7.2.1 Air filtering........................................................... 20
7.2.2 Coupling ............................................................ 21
7.2.3 Lubrication .......................................................... 22
7.2.4 Oil removal .......................................................... 23
7.3 Repair/ Service............................................................... 24
7.4 Spare parts.................................................................. 25
8 Malfunctions: Causes and elimination........................................... 26
9 Technical Data .............................................................. 29

4|www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Foreword
1 Foreword
1.1 Principles
These operating instructions:
• are a part of the following oil-flooded rotary vane
vacuum pumps, V-VC40, V-VC 50, V-VC75,
V-VC 100 and V-VC 150.
• describe how to use them safely and properly in
all life phases.
• must be available where the equipment is used.
1.2 Target group
The target group for these instructions is technically
trained specialists.
1.3 Supplier documentation and accompanying documents
Document Contents No.
Supplier documentation
Operating Instructions BA 231
Declaration of Conformity C 0045
Declaration of harmlessness 7.7025.003.17
Spare parts’ list Spare parts document E 231
Data sheet Technical data and graphs D 231
D 231-30
Info sheet Water vapour compatibility for oil-flooded
vacuum pumps I 200
Info sheet Storage guidelines for machines I 150
Info sheet Storage guidelines for lubricants I 100
Manufacturer’s declaration EU Directive 2011/65/EU (RoHS II) —
1.4 Abbreviations
Fig. Figure
V-VC Vacuum pump
m3/h Suction capacity
mbar (abs.) Final vacuum, operating vacuum
IV Version with reduced final vaccum
XD Variant for increased water vapour
compatibility
1.5 Directives, standards, laws
See Conformity Declaration

5
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Foreword
1.6 Symbols and meaning
Symbol Explanation
Condition, pre-requisite
#### Instructions, action
a), b),... Instructions in several steps
Results
[-> 14] Cross reference with page number
Information, note
Safety symbol
Warns of potential risk of injury
Obey all the safety instructions with this symbol in order to avoid injury
and death.
1.7 Technical terms and meaning
Term Explanation
Machines Pump and motor combination ready to be connected
Motor Pump drive motor
Vacuum pump Machine to create a vacuum
Rotary vane Machine’s design or active principle
Suction capacity Vacuum pump volume flow related to the condition in the suction con-
nection
Final pressure (abs.) The maximum vacuum that a pump reaches when the suction opening is
closed. Given as absolute pressure.
Permanent vacuum The vacuum or the suction range at which the pump operates perma-
nently.
The permanent vacuum or intake pressure is ≥ than the final vacuum and
< than the atmospheric pressure.
Noise emission The noise emitted at a specific loading given as a figure, sound pressure
level dB(A) as per EN ISO 3744..
1.8 Copyright
Passing on or copying this document, using and
providing information on its contents are prohibited
unless expressly permitted.

6|www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Safety
2 Safety
The manufacturer is not responsible for damage if
you do not follow all of this documentation.
2.1 Warning instruction markings
Warning Danger level Consequences if not obeyed
DANGER immediately imminent danger Death, severe bodily injury
WARNING possible imminent danger Death, severe bodily injury
CAUTION possible hazardous situation Slight bodily injury
NOTICE possible hazardous situation Material damage
2.2 General
These operating instructions contain basic instruc-
tions for installation, commissioning, maintenance
and inspection work which must be obeyed to en-
sure the safe operation of the machine and prevent
physical and material damage.
The safety instructions in all sections must be taken
into consideration.
The operating instructions must be read by the
responsible technical personnel/ operator before
installing and commissioning and must be fully un-
derstood. The contents of the operating instructions
must always be available on site for the technical
personnel /operator. Instructions fixed directly onto
the machine must be obeyed and must always re-
main legible. This applies for example to:
• Symbols for connections
• Data and motor data plate
• Instruction and warning plates
The operator is responsible for observing local regu-
lations.

7
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Safety
2.3 Designated use
The machine must only be operated in such areas
as are described in the operating instructions:
• only operate the machine in a technically perfect
condition
• do not operate the machine when it is only par-
tially assembled
• the machine must only be operated at an ambi-
ent temperature and a suction temperature of
between 12 and 40 °C
Please contact us for temperatures outside this
range.
• the machine may convey, compress or extract
the following media:
• Air
The air sucked in may contain water vapour
but no water or other liquids. For water va-
pour compatibility see Info I 200
• all non-explosive, non-inflammable, non-ag-
gressive and non-poisonous dry gases and
gas air mixtures
2.4 Unacceptable operating modes
• extracting, conveying and compressing explo-
sive, inflammable, aggressive or poisonous me-
dia, e.g. dust as per ATEX zone 20-22, solvents
as well as gaseous oxygen and other oxidants
• extracting, conveying and compressing ex-
plosive, inflammable, aggressive, oxidative or
poisonous media, e.g. dust as per ATEX zone
20-22, solvents
• using the machine in non-commercial plants if
the necessary precautions and protective meas-
ures have not been taken in the plant
• installing in environments that are at risk of ex-
plosions
• using the machine in areas with ionising radia-
tion
• back pressures on the outlet side of more than
+0,1bars
• modifications to the machine and accessories

8|www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Safety
2.5 Personal qualifications and training
• Ensure that people entrusted with working on
the machine have read and understood these
operating instructions before starting work,
particularly the safety instructions for installation,
commissioning, maintenance and inspection
work.
• Manage the responsibilities, competence and
monitoring of staff
• all work must only be carried out be technical
specialists:
• Installation, commissioning, maintenance
and inspection work
• Working with electricity
• personnel being trained to work on the ma-
chine must be supervised by technical special-
ists only
2.6 Safety-conscious work
The following safety regulations apply in addition
to the safety instructions and intended use listed in
these instructions:
• Accident prevention regulations, safety and op-
erating regulations
• the standards and laws in force
2.7 Safety notes for the operator
• hot parts of the machine must not be accessible
during operation or must be fitted with a guard
• People must not be endangered by the free
extraction or discharge of pumped media
• Risks arising from electrical energy must be
eliminated.
• The machine must not be in touch with inflam-
mable substances.
Danger of fire by hot surfaces, discharge of
pumped media or cooling air

9
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Safety
2.8 Safety instructions for installing, commissioning and maintenance
• The operator will ensure that any installation,
commissioning and maintenance work is car-
ried out by authorised, qualified specialists who
have gained sufficient information by an in-depth
study of the operating instructions.
• Only work on the machine when it is idle and
cannot be switched on again
• Ensure that you follow the procedure for decom-
missioning the machine described in the operat-
ing instructions.
• Fit or start up safety and protective devices
again immediately after finishing work.
• Conversion work or modifications to the ma-
chine are only permissible with the manufactur-
er’s consent.
• Only use original parts or parts approved by the
manufacturer. The use of other parts may invali-
date liability for any consequences arising.
• Keep unauthorised people away from the ma-
chine
2.9 Guarantee conditions
The manufacturer’s guarantee or warranty will no
longer apply in the following cases:
• Improper use
• Not complying with these instructions
• Operation by insufficiently qualified staff
• Using spare parts that have not been approved
by Gardner Denver Schopfheim GmbH
• Unauthorised modifications to the machine or
the accessories supplied by Gardner Denver
Schopfheim GmbH

10 |www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Fig. 1 Lifting and transporting
1Eyebolt
Transport, storage and disposal
1
3 Transport, storage and disposal
3.1 Transportation
3.1.1 Unpack and check the delivery condition
a) Unpack the machine on receipt and check for
transport damage.
b) Notify the manufacturer of transport damage im-
mediately
c) Dispose of the packaging in accordance with the
local regulations in force.
3.1.2 Lifting and transporting
WARNING
Death or limbs crushed as a result of the items
being transported falling or tipping over.
When transporting with the lifting device remem-
ber:
a) Select the lifting device suitable for the total
weight to be transported.
b) Ensure that the machine cannot tip and fall.
c) Do not stop under a suspended load.
d) Put the goods to be conveyed on a horizontal
base.
Lifting device/ Transporting with a crane
WARNING
Bodily injury resulting from improper operation
a) Loads crosswise to the ring level are not per-
mitted.
b) Avoid impact stress.
a) Tighten the eyebolts (Fig. 1/1) firmly.
b) The machine must be suspended on the eyebolt
using the lifting device for lifting and transport-
ing.

11
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Transport, storage and disposal
3.2 Storage
NOTICE
Material damage caused by improper storage.
Ensure that the storage area meets the following
conditions:
a) dust free
b) vibration free
3.2.1 Ambient conditions for storage
Ambient conditions Value
Relative humidity 0 % to 80 %
Storage temperature -10 °C to +60 °C
For long-term storage (more than 3 months), it is
useful to use a preservation oil rather than operating
oil.
See Info “Machine storage guidelines” I 150 and
I 100
3.3 Disposal
WARNING
Danger from inflammable, corrosive or poison-
ous substances.
Machines that come into contact with hazard-
ous substances must be decontaminated before
disposal.
When disposing ensure the following:
a) Collect oils and grease separately and dispose
of in accordance with the local regulations in
force.
b) Do not mix solvents, cold cleaner and paint resi-
dues
c) Remove components and dispose of them in
accordance with the local regulations in force.
d) Dispose of the machine in accordance with the
national and local regulations in force.
e) Parts subject to wear and tear (marked as such
in the spare parts list) are special waste and
must be disposed of in accordance with the
national and local waste laws.

12 |www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Set up and operation
F
F
E
B
F
E
E
FA
T
MH
IK
QD N
LQ
OU
PP1
4 Set up and operation
4.1 Setup
Fig. 2 Vacuum pump V-VC 40 - V-VC 150
AVacuum connection
BExhaust air outlet
DSuction flange
ECooling air inlet
FCooling air outlet
HOil filling point
IOil sight glass
KOil discharge point
LOil separator element
V-VC 40/50/75 -> 3 x • V-VC 100/150 -> 4 x
MOil recommendation plate
NData plate
ORotation direction arrow
PDrive motor
P1Motor data plate
Qhot surfaces > 70 °C
TOil remover housing
UGas ballast valve

13
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
 











Set up and operation
7
45
10
2
689
1 3
4.1.1 Data plate
Fig. 3 Data plate
4.2 Description
V-VC40, V-VC 50, V-VC75, V-VC 100 and V-VC150 150 have a micro filter on the intake side and an oil and
oil mist separator for the return of the oil to the oil system on the outlet side. The vacuum pump is housed in
a sound cover. A fan between the pump housing and the motor cools the air in the pump housing and cools
the circulating oil.
An integral non-return valve prevents the evacuated system from being ventilated after the pump has
stopped. If the machine has been idle for more than two minutes the connected pipe should be ventilated to
atmospheric pressure.
A gas ballast valve fitted as standard (Fig. 2/U) prevents condensation of water vapour in the inside of the
pump when low amounts of steam are sucked in when the pump is at operating temperature. A reinforced
gas ballast (optional) can be used if there is a higher amount of water vapour.
The pumps are driven by standard flanged three-phase motors using a coupling.
Design „XD“: The functional parts are more resistant against water steam and solvents. In addition,
glass-fibre reinforced slide gates (GF) are used that are made of epoxy resin. The gas bal-
last quantity was increased.
Generally, the oil sump temperature was clearly increased compared with the standard
design.
Design „IV“: The pump is optimised to reach an increased final pressure and has no gas ballast valve.
This variant is especially suitable as backing pump for the operation of a booster pump.
1 Type/ Size (mechanical version)
2 Serial number
3 Year of construction
4 Data Matrix Barcode
5 Item no.
6 Speed 50 Hz/60 Hz
7 Motor output 50 Hz/60 Hz
8 Operating mode
9 Suction capacity 50 Hz/60 Hz
10 Ultimate vacuum (abs.) 50 Hz/60 Hz
Following information are encrypted in the barcode:
• Material number (MA)
• Production order (PR)
• Serial number (SC)

14 |www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Set up and operation
4.3 Areas of application
These oil-flooded rotary vane vacuum pumps V-VC 40, V-VC 50, V-VC75, V-VC 100 and V-VC150 are suit-
able for producing vacuums. The nominal suction capacity with free suction is 40, 50, 70, 100 and 150 m3/h
at 50 Hz. Data sheet D 231 / D231-30 shows the dependency of the suction capacity on the intake pressure.
These types are suitable for the evacuation of closed systems or for a continuous vacuum within the follow-
ing intake pressure ranges:
Standard pump: 0.5 to 500 mbar (abs.)
Design „IV“: < 100mbar (abs.)
Design „XD“: 3.0 to 500 mbar (abs.)
If the machine is operated continuously outside these ranges there is the risk of oil leaking through the outlet
opening. When evacuating closed systems the volume to be evacuated must be no more than 2% of the
nominal suction capacity of the vacuum pump.
For permanent operation of > 100 mbar (abs.) the next larger motor output must be used.
If the unit is switched on more frequently (at regular intervals of about 10 times an hour) or at
higher ambient temperatures and intake temperatures, the excess temperature limit of the motor
winding and the bearings may be exceeded.
Please contact the manufacturer should the unit be used under such conditions
If it is installed in the open air the unit must be protected from environmental influences, (e.g. by a
protective roof).

15
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Installation
5 Installation
5.1 Preparing for installation
Check the following points:
• Machine freely accessible from all sides
• Do not close ventilation grids and holes
• Sufficient room for installing and removing pipes
and for maintenance work, particularly for install-
ing and dismantling the machine
• No external vibration effects
• Do not suck any hot exhaust air from other ma-
chines into the cooling system.
The suction flange (Fig. 2/D), oil filling point (Fig. 2/H), oil sight glass (Fig. 2/I), oil outlet (Fig. 2/K),
gas ballast (Fig. 2/U) a the oil removing device housing (Fig. 2/T) must be easily accessible.
The cooling air inlets (Fig. 2/E) and the cooling air outlets (Fig. 2/F) must be at least 30 cm away
from adjacent walls. Cooling air coming out must not be sucked in again.
For maintenance work there must be a space of at least 40 cm around the machine.
5.2 Installation
NOTICE
The machine may only be operated when it is
set up horizontally.
Material damage resulting from the machine
tipping over and falling.
When installed at more than 1000 m above sea
level a reduction in power is noticeable. In this
case we would ask you to contact us.
Ensure that the foundation complies with the follow-
ing conditions:
• Level and straight
• The bearing surface must be at least the same
size as the machine
• The bearing surface must be able to bear the
weight of the machine
It is possible to install the machine on a firm base without anchoring. When installing on a substruc-
ture we recommend fixing with flexible buffers

16 |www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Installation
5.3 Connecting pipes
WARNING
Sealing or constricting of the exhaust air outlet
(Fig. 2/B) may lead to severe or fatal injuries!
In the aggregate an inside pressure can be higher
and higher, which leads to the destruction of com-
ponents!
NOTICE
Material damage resulting from the forces and
torques of the pipes on the unit being too high.
Only screw pipes in by hand.
The suction capacity of the vacuum pump is
reduced if the suction pipe is too narrow and/
or too long.
Counter pressures on the outlet side are only
permissible up to + 0.1 bar.
Prevent liquids accumulating in the exhaust
line.
a) The vacuum connection (Fig. 2/A) can be found
on the suction flange (Fig. 2/D).
b) The discharged air can be freely blown out
through the exhaust air hole (Fig. 2/B) or con-
ducted away using a hose or pipe.
5.4 Filling with lubricating oil
NOTICE
The pumps are delivered with first oil filling. With
this, it can happen that the oil has a dark colour
due to graphite leaching.
a) Fill the lubricating oil (for suitable types see the
“Maintenance” section) via the oil filling point
(Fig. 2/H) up to the upper edge of the sight glass
(Fig. 2/I).
b) Close the oil filling points.

17
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Installation
5.5 Connecting the motor
DANGER
Danger of death if the electrical installation has
not been done professionally.
The electrical installation must only be done by a
qualified electrician observing EN 60204. The operat-
ing company has to provide the main switch.
a) The motor’s electrical data is given on the
data plate (Fig. 2/N) or on the motor data
plate (Fig. 2/P1). The motors comply with DIN
EN 60034 and are in protection class IP 55 and
insulation class F. The appropriate connection
diagram is located in the motor's terminal box
(not for the plug connection version). Compare
the motor data with the data of the existing
mains network (current type, voltage, network
frequency, permitted current value).
b) Connect the motor via the motor protection
switch (for safety reasons, a motor protection
switch is required and the connecting cable
must be installed via a cable fitting to provide
strain relief).
We recommend using motor protection switches
with delayed switch off, depending on possible
excess current. Temporary excess current can
occur when the machine is started cold.
NOTICE
Power supply
The conditions at the installation location must match
the information on the motor data plate. Without
derating the following is permissible:
• ± 5 % Voltage deviation
• ± 2 % Frequency deviation

18 |www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Commissioning and decommissioning
6 Commissioning and decommissioning
6.1 Commissioning
WARNING
Improper use
May lead to severe or fatal injuries. Therefore be
sure to obey the safety instructions.
CAUTION
Hot surfaces
When the machine is at operating temperature
the surface temperatures on the components
(Fig. 2/Q) may go above 70 °C.
You must avoid touching the hot surfaces
(marked with warning plates).
CAUTION
Noise emission
The highest noise pressure levels measured as
per EN ISO 3744 are given in Section 9.
When spending a long time in the vicinity of the
running machine use ear protectors to avoid per-
manent damage to your hearing.
CAUTION
Oil aerosols in the extracted air
In spite of the air oil removing system separating the
oil mist to a large extent, the extracted air contains
a small residue of oil aerosols. Breathing in these
aerosols all the time could damage your health.
Therefore you must ensure that the installation room
is well ventilated.

19
www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH |
Commissioning and decommissioning
6.1.1 Checking the rotation direction
The drive shaft direction of rotation is shown by
the rotation direction arrow (Fig. 2/O) on the mo-
tor flange.
a) Start the motor briefly (max. two seconds) to
check the direction of rotation. When looking at
the motor fan, it must rotate clockwise.
NOTICE
Incorrect direction of rotation
Operating in the wrong direction of rotation leads
to damage to the machine.
Use a phase sequence indicator to check the direc-
tion of rotation (anti-clockwise rotating field).
b) After correcting the direction of rotation if nec-
essary, start the motor again and stop it again
after 2 minutes in order to top missing oil up to
the upper edge of the sight glass (Fig. 2/I). This
topping up at the filling point (Fig. 2/ H) must be
repeated until all the oil pipes have been filled
completely. The filling point must not be open
when the pump is running.
6.2 Decommissioning/ storing
Stop the machine
a) Switch the machine off.
b) If available close the cut off device in the suction
and pressure pipe.
c) Disconnect the machine from the electricity
source.
d) Depressurise the machine:
Open the pipes slowly.
The pressure reduces slowly.
e) Remove the pipes and hoses.
f) Seal the connections for suction and pressure
nozzles using adhesive foil.
see also Section 3.2.1, Page 11
6.3 Re-commissioning
a) Check the condition of the machine (cleanliness,
cabling etc.).
b) Drain the preserving agents.
For installation see Section 5 Page 15
For commissioning see Section 6.1 Page 18

20 |www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Maintenance and repair
7 Maintenance and repair
DANGER
Danger of death from touching live parts.
Before maintenance work disconnect the machine
by pressing the main switch or unplugging it and
ensure that it cannot be turned on again.
WARNING
Hot surfaces and equipment
During maintenance work there is the danger of
getting burnt on hot components (Fig. 2/Q) and
by the machine lubricating oil.
Wait for the machine to cool down.
7.1 Ensuring operational safety
Regular maintenance work must be carried out in order to ensure operational safety.
Maintenance intervals also depend on the operational demands on the machine.
With any work observe the safety instructions described in Section 2.8 "Safety notes for installation, com-
missioning and maintenance".
The whole unit should always be kept in a clean condition.
7.2 Maintenance work
Interval Maintenance to be carried out Section
monthly Check the pipes and screws for leaks and to ensure they are
seated properly and if necessary seal again or tighten up.
—
monthly Check the terminal box and cable inlet holes for leaks and if
necessary re-seal.
—
monthly Clean the ventilation slots on the machine and the motor
cooling ribs.
—
depending on how dirty the
discharged medium is.
Clean intake air filter
Clean gas ballast valve filter
7.2.1
at least once a year Check for coupling wear 7.2.2
daily Check the oil level 7.2.3
500 - 2000 h Change the oil
2000 h Change the oil separator elements 7.2.4