Graco REGULUS 003.175-DP Operation manual

USER INFORMATION 6000300E
PLEASE KEEP SAFE FOR FUTURE USE Rev. C
B.6.50.80-GB
Diaphragm pump REGULUS ®3:1
*5$&2
®
GRACO N.V.
Industrieterrein “Oude Bunders”
Loc. 2206 - Slakweidestraat 31
3630 Maasmechelen - Belgium
Tel.: [phone] Fax: [phone]

The original manufacturer’s nameplate is on the diaphragm pump.
Please compare the data and supplement if possible.
In this manual important information is marked with the following symbols:
Please pass on all safety information to other users.
Information which affects your safety.
Information important to functional running.
Read and observe the operating and safety instructions before
commissioning!
*5$&2
VERFAHRENSTECHNIK GMBH
D-33647 BIELEFELD
[
Translation of nameplate]
AIR OPERATED
DIAPHRAGM PUMP
Model 003.175-DP
Production no.
Year of construction
Material
volume flow max.: 114 l/min.
Temperature max.: 80 °C
Excess pressure max.: 18 bar
Air inlet
pressure max.: 6 bar
Transmission ratio: 3:1

CONTENTS OF USER INFORMATION
Page
OPERATING INSTRUCTIONS
CORRECT USE 2
FUNCTIONAL DIAGRAM 3
DESCRIPTION OF FUNCTIONS 3
COMPONENT PARTS OF APPLIANCE - IMPORTANT INFORMATION 4
LIST OF TOOLS 9
INSTALLATION 10
COMMISSIONING 13
IMPORTANT INFORMATION CONCERNING COMMISSIONING AND OPERATION 14
OPERATION 15
MAINTENANCE AND INSPECTION, REPAIRS 15
TORQUE MOMENTS 21
DECOMMISSIONING 21
SOLVING BREAKDOWNS 22
NOTES 23
Self monitoring 23
User information 23
DIAPHRAGM PUMP 003.175-DP
*5$&2
79990 025029-2/5
We reserve the right to make amendments
Proc. 11.12.98 Voigt B.6.50.80-B-GB
10.99
F22.060.01, Ausg. 07.97
Checked - OPERATING INSTRUCTIONS -
USER INFORMATION Issued
Continued on pages 02 to 23

2 B.6.50.80-B-GB
CONTENTS CONTINUED
Page
TECHNICAL DESCRIPTION OF PRODUCT
DESCRIPTION OF DIAPHRAGM PUMP 01
SUITABILITY; MATERIAL 02
TECHNICAL DATA 03
Key to designation 03
Product range; data 03
Sound emission 04
Construction materials used in surface areas in contact with fluid material 05
Dimensions, connection threads, nominal diameters, extensions 06
NOTES 06
LIST OF REPLACEMENT PARTS
REPLACEMENT DIAPHRAGM PUMPS, REPLACEMENT ACCESSORIES (Extract from sales
catalogue)
Includes:
TEST CERTIFICATE (final inspection)
EC DECLARATION OF CONFORMITY
BRIEF USER INSTRUCTIONS (can be adhered to pump)
BRIEF OPERATING INSTRUCTIONS, WARNING SIGNS
CORRECT USE
The diaphragm pumps 003.175-DP are exclusively manufactured for the usual applications in
surfacing technology (to convey coatings or auxiliary agents or for spraying) or similar work.
Any other purpose above and beyond this is considered incorrect use. We are not responsible for
any damage or injury resulting from this; the user bears the sole responsibility in such cases.
Correct use includes observing the operating, maintenance and inspection conditions and
regulations laid down by us.
003.175-DP diaphragm pumps may only be used, maintained and repaired by personnel familiar
with, and trained to recognise the inherent dangers.
The relevant accident prevention regulations as well as safety and medical rules must be observed.
Unilateral changes to the appliance will cause us to waive our responsibility for any damage or injury
caused.
The user is responsible for the correct installation of the appliance.

3 B.6.50.80-B-GB
FUNCTIONAL DIAGRAM
D DIAPHRAGM PUMP 1 Pressure tank 7 Safety valve
E COMPRESSED AIR SUPPLY 2 Pipeline or hose 8 Sound absorber
F EXHAUST AIR SOUND
SUPPRESSION 3 Pressure regulation valve 9 Vessel
G MATERIAL SUCTION DEVICE 4 Ball cock bl Suction pipeline
H MATERIAL PRESSURE
SYSTEM 5 Ball cock bm Pressure pipeline
I SUPPORT 6 Safety valve bn Sieve
DESCRIPTION OF FUNCTIONS
The compressed air is supplied to the diaphragm pump Dfrom a pressure tank 1via a pipe or
hose 2and a pressure control valve 3. The air supply from the pressure tank to the diaphragm
pump can be interrupted by the ball cock 4.
The other ball cock 5is used for manually releasing condensation (an automatic steam trap would
be preferable here).
The safety valve 6protects the pressure tank against inadmissible rises in air pressure (e.g. in the
event of heating).
There is also a safety valve 7on the diaphragm pump because as a rule the compressed air supply
Eis not installed for the diaphragm pump only, and because it is obligatory.
Fig. 1
Compressor

4 B.6.50.80-B-GB
During operation, compressed air escapes into the atmosphere from the propulsion mechanism of
the diaphragm pump via the integrated sound absorber 8. This unburdens it.
The material (coating or auxiliary agents) is sucked out of a material receptacle 9via the suction
line bl by the diaphragm pump and fed on under pressure via the pipe or hose line bm to the
withdrawal point.
A sieve (dirt trap) bn protects the diaphragm pump against foreign bodies which have unintentionally
entered the material.
COMPONENT PARTS OF APPLIANCE - IMPORTANT INFORMATION
The following must be fulfilled if the appliance is to be considered ready for operation:
DTHE DIAPHRAGM PUMP
For the description of the functions of the diaphragm pump see "Technical Description of
Product B. 6.50.80-P“.
ETHE COMPRESSED AIR SUPPLY
The compressed air supply consists of the compressor, the pressure tank with steam trap,
possibly a compressed air drier and pipeline. The compressed air supply is generally already
available to the user.
 If a compressed air supply must be installed the relevant accident prevention regulations,
safety rules and user information, in particular information from the compressor
manufacturer, must be applied.
There must be a flexible connection between the diaphragm pump and the compressed air line
(avoids fractures caused by vibrations). A hose line is most suitable
 nominal diameter 13 or bigger
 operational pressure = max. mains pressure, preferably•16 bar
 air and local temperature -20 to 50 °C
 free of materials detrimental to paint such as silicone
In areas with a danger of explosion the compressed air line and the hose line must be
electrically conductive (to avoid electrostatic charging).
- leakage resistance < 106Wto earth.
The pressure control valve is in most cases directly fitted to the diaphragm pump.
 efficient rate of flow
at 6 bar and 25 m/s > 114 m³/h
 air inlet pressure 16 bar
 air and local temperature 0° C to 50 °C

5 B.6.50.80-B-GB
It goes without saying that the pressure control valve can be situated between the hose line
and the compressed air line.
The manometer connected 3.1 in function diagram enables exact setting and control of
the air pressure required.
 display range 0 to 16 bar
 air and local temperature 0 to 50 °C
 damped construction
A shutoff mechanism (e.g. ball cock) should be fitted between the pressure control valve and
the hose line in all cases, or between the hose line and the compressed air line. This enables a
quick and safe diaphragm pump switch-off before operating pauses, maintenance work and in
cases of breakdown.
There is no change to the value set on the pressure control valve:
 Nominal pressure 16 bar
 Material CuZn, nickel-plated
For ball cocks the following must be observed: stopcock transverse to flow direction =
pipe is closed off
There are no special requirements as regards the quality of the compressed air supplied to the
diaphragm pump.
 condensation and residue oil from the compressor are trapped
(pressure tank, compressed air filter)
 oiling of compressed air not necessary
 temperature of compressed air 10°C to 50 °C
FEXHAUST AIR SOUND ABSORBER
The sound emissions of a compressed air powered diaphragm pump is damaging to hearing in
the absence of a sound absorber [> 100 dB(A)]. Every diaphragm pump is therefore fitted with
an integrated sound absorber.
Do not use PTFE or hemp to seal connections (causes pressure control valve
malfunction due to residue from compressed air supply).
In painting processes the compressed air must be free of substances which could
lead to the formation of craters (oil, silicone).
- This also applies to component parts of the compressed air supply.

6 B.6.50.80-B-GB
As there is a connection between sound absorption and the formation of ice on the diaphragm
pump control system, the sound level cannot be reduced with a sound absorber as much as
would be desired [not < 70 db(A)].
The diaphragm pump may not be used without the sound absorbing components.
- The decision to wear ear protection depends on the operating pressure and the
resulting sound level.
GMATERIAL SUCTION SYSTEM
The cross section of the suction line is so measured that
material with a kinematic viscosity of up to 750
mm²/s(cSt) can be sucked without difficulty by the
diaphragm pump. Higher viscosity can result in difficulties
ranging from a reduction in the suction performance to
interrupted suction, identifiable by an increasingly greater
fall in pressure during the change of direction (pulsating
pressure).
 Measures for improvement are:
keeping the suction line as short as
possible or a short
suction hose with a larger cross section.

Suction system characteristics are:
 Electrically conductive, maximum permissible resistance 3 . 104 W/m (tested to ISO 8031)
and leakage resistance to earth < 106W.
Suitable for use in hazardous locations.
 The individual parts of the suction system are designed to withstand an excess pressure of
12 bar (- Suitable for suction heights of up to 8.5 m).
 The suction hose and the suction sieve are resistant to the usual solvents in the surface
coating and silicone-free.
 Minimum nominal diameter 25
See "Technical Description of Product B.6.50.80-P-
GB", page
04 for more detailed information on the sound level.
Fig. 2
suction device
ALL METAL PARTS IN CONTACT WITH THE SUCT
ION AREA
MATERIAL ARE MADE OF AUSTENITIC STAINLESS STEEL.

7 B.6.50.80-B-GB

Temperature of material 10 °C to 85 °C
 Sieve mesh size 1.8
For a fixed installation the connections diaphragm pump
material loop pipe or diaphragm pump pressure tank
must be flexible (avoids fracture caused by vibrational
stresses). The characteristics of the suction pipe are the
same as those for the suction equipment.
The diaphragm pump may not be pressurised from the suction side.
- This could destroy important functional components.
The viscosity of thixotropic materials is reduced when
stirred; this can have the effect that the suction
performance of the diaphragm pump is improved
(amongst others).
The agitator is fixed to the pipe of the suction device. The
clamp (bracket) must be fixed to the vessel rim. This
ensures that the agitator propeller is in the right position
in relation to the vessel wall, the base and the suction
pipe, and that frictional contact is impossible.
The agitator is pneumatically driven, max. allowable input pressure 6 bar. Rotational speeds
can be adjusted using the butterfly valve connected. The user should determine the optimal
rotational speed for the material used.
 The agitator propeller is surrounded by an external protection ring
- Techn. Product Description B.18.10.05-P
HMATERIAL PRESSURE SYSTEM
The material pressure system is normally composed of a hose and/or pipeline.
For surface coating, the hose must have the following characteristics:
 Electrically conductive, max. permissible resistance 3 x 104W/m (tested to ISO 8031).
 The inside pipeline coating must be resistant to normal solvents, the outer coating resistant
under certain conditions.
Suction pipe
Fi
g
.
3
Suction device
A
g
it
a
t
or
Fi
g
. 4
Immersed agitator parts (shaft and propeller) are made of austenitic stainless steel
(1.4305).

8 B.6.50.80-B-GB

Free from materials detrimental to paint use such as silicone.
 Operational temperature -40 °C to 90 °C or higher.
 Meets the requirements of all relevant standards (design, identification).
 The internal hose fittings must be of austenitic stainless steel, outer fittings of galvanised
and yellow chromated steel.
 Operating pressure > max. allowable excess pressure of diaphragm pump
 Connection thread normally G1.
In most cases the material pressure connection is joined to the diaphragm pump by a pipeline
The connection must be flexible (avoids fracture caused by vibration stresses).
The characteristics of the flexible pressure line:
 Minimum nominal diameter 25
 Operating pressure > max. allowable diaphragm
pump excess pressure
 Operating pressure > max. allowable diaphragm
pump excess pressure
 Operational temperature 10 to 90 °C
 For areas subject to danger of explosion:
Electrically conductive, leakage resistance to
earth < 106W.
 The following applies to the surface coating :
resistant to normal solvents and free from
materials detrimental to paint use such as
silicone.
In an expanded material pressure system and in cases where the pressure system is
influenced by heat (sunrays, heating, etc.) it is necessary to fit a suitable non-return
valve in the pressure pipeline (to prevent damage caused by heat expansion).
F APPLIANCE SUPPORT
A wall fixing and a frame support the 003.175-DP diaphragm pump.
Fig. 5
Pipeline
Flexible
pressure pipeline
Non-return valve
All metal parts of the pressure and suction accessories supplied by us which come in
contact with the material are of austenitic stainless steel. They are suitable for use with
water lacquer.

9 B.6.50.80-B-GB
2 bars are used as wall fixings. This type of fixing
is provided for flat walls such as machine walls.
A wall fixing made of 2 bars and profile sheets is
recommended for uneven walls (brickwork).
The frame is used to support the diaphragm pump on an
even floor. The bearing surface should be as even as
possible and level (slope < 3°).
All setup positions have the suction connection of the
diaphragm pump facing downward, and the pressure
connection facing upward. A connection facing in any
other direction will impair the pump function.
Screws and dowels of all fixtures supplied by us conform
to technical product description
B.17.90.01-P .
TOOL LIST
Allen Screw
DIN 911 Open-ended Spanner
DIN 895
Flat-nosed
pliers
DIN 5248
Pliers
DIN 5256 C
Gripper
Article No.
70630 002002
Assembly bolt
Article No.
70640 001002
SW 4, SW 5,
SW 6, SW 8 SW 8, SW 13, SW 19, SW 32 Length 140 for retaining
ring « 12 - 25 Special tool Special tool
Open-ended Spanner DIN 895
SW 32 Compressed air hose line (compressed air accessories)
SW 41 Screw fitting for suction and pressure connections
Bar Profile sheet
Fig. 6 Fig. 7
Fig. 8
Table 1
Frame

10 B.6.50.80-B-GB
INSTALLATION
INSTALLATION AND SECURING
Diaphragm pumps may only be mounted in a horizontal position (as drawing). Any other position can
lead to malfunctioning.
The following criteria must be met for a safe fixing:
 bearing surface and / or wall even and load bearing.
 dowels and fixing screws must be of sufficient size
(Techn. Product Description B.17.90.01-P).
Do not mount in closed rooms (cabinets)
(- malfunction due to icing of control system).
When installing in hazardous locations, zone 1, you should
observe the guidelines for explosion prevention (EX-RL) ZH
1/10 (chapter E2), as regards assembly materials.
The diaphragm pumps must not be installed in zone 0 (receptacles).
VENTILATION OF WORK AREA
must be provided.
EARTHING
The appliances must be earthed in hazardous locations.
The following applies in relation to the guideline under "Static Electricity" ZH 1/200:
The earthing must be mechanically so resistant and corrosion-proof as to withstand all conditions to
which it may be subjected in operation. The earth conductors should be connected to all appliance
components and to the earth by soldering, welding or protected screw fittings. Chains may not be
used. When making connections, in particular to pipelines, it should be ensured that the earth
conductor is not interrupted by non-conductive parts or during repair work.
The earth connection should be tested for functionality under operational conditions by an expert.
 The earth connection points on all devices are marked:
Material pressure line
Compressed air pipeline
Suction device
Fig. 9

11 B.6.50.80-B-GB
Movable, conducting vessels or appliances which could store an electric charge should also be
earthed. The is usually achieved with a flexible connection that is secured, for example, with a clip.
 Chains may not be used.
COMPRESSED AIR SUPPLY
The compressor and compressed air storage receptacle (pressure tank) must be of sufficient size
- Check thoroughly
 see also page 5, "Quality of Compressed Air"
CONNECTIONS
Compressed air pipeline diaphragm pump
Suction pipeline diaphragm pump
Pressure pipeline diaphragm pump
These should be flexible and, in hazardous locations, electrically conductive.
 see pages 4, 7 and 8
COMPRESSED AIR PIPELINE
If a compressed air line must be laid it must have a gradient of 3 to 5 mm per m down to the
compressed air tank or the water trap.
If a branch line has to be made from an existing compressed
air line, this should be carried out above the level of the pipe
axis.
In the case of bends in metal air pipes these should be
selected with a bend radius of the pipe axis not smaller than
2.5 x the pipe outside diameter.
 Plastic pipelines in hazardous locations must have a conducting resistance to earth
of < 106 W.
Fig. 10
Main pipeline
Branch to
consumer

12 B.6.50.80-B-GB
COMPRESSED AIR CONTROL VALVE (PRESSURE CONTROL VALVE),
MANOMETER AND BALL COCK
 see pages 4 and 5
If the pressure control valve 1is fitted to the diaphragm pump
it can be adjusted for easier reading of the manometer.
 loosen union nut 2
 adjust pressure control valve
 tighten union nut
MATERIAL SUCTION DEVICE
 See pages 6 and 7
Connection of the suction device to the diaphragm pump takes
place using a normal cutting ring threaded joint or using the
pivotable angled cutting ring threaded joint
(Article No. 77741 131003).
MATERIAL PRESSURE SYSTEM
 See pages 7 and 8
The pressure pipeline is connected using a cutting ring
threaded joint.
Fig. 11
Fig. 13
Fig. 12

13 B.6.50.80-B-GB
GENERAL ASSEMBLY INSTRUCTIONS
 Keep to recommended torque.
 Grease thread lightly.
 Do not use PTFE tape or hemp.
 Components not supplied by us must be so dimensioned as to correspond to the given
dimensions of the diaphragm pump. - Note manufacturer’s instructions.
 Observe manufacturer’s assembly instructions when using cutting rings or double conical
rings.
If liquids are to be pumped which contain chlorinated hydrocarbons (carbon hydrides), e.g.
trichloroethane or dichloromethane, the parts in contact with the material in the suction and
pressure system must not be made of aluminium or have a zinc-plated surface.
- there can be metal organic reactions which are explosive and extremely caustic.
COMMISSIONING
FLUSHING DIAPHRAGM PUMP
As every diaphragm pump is tested in the works after assembly using an anti-corrosion liquid it is
necessary to thoroughly flush out the rest of this liquid (and any other contaminants which have
entered during installation) with detergent (flushing agent).
-please see "Commissioning diaphragm pump/plant“ ,
The detergent should be subsequently removed as completely as possible from the system. This
can be accomplished with air suction.
 Set air inlet pressure < 0.5 bar.
Any detergent used must be compatible with materials to be used later; we recommend
consulting your material supplier.
COMMISSIONING DIAPHRAGM PUMP / PLANT
As the diaphragm pump works automatically with back pressure it can only be commissioned
(material transport) if material is extracted / let out of the pressure system.
Open compressed air supply to pressure control valve.
- Open stop cock in compressed air line.
 stop cock handle parallel to compressed air pipe

14 B.6.50.80-B-GB
- Open pressure control valve.
AERATING (BLEEDING) OF APPLIANCE/PLANT
Any air remaining in the diaphragm pump or the system must be removed completely.
Ensure that the material supply (suction pipe) is immersed in the material. Open the pressure control
valve until the diaphragm pump slowly starts.
- Operate the diaphragm pump with < 2 bar material pressure
until no more air is pumped.
PREPARING FOR SPRAYING
Raise the material excess pressure slowly to the maximum value.
Operate the diaphragm pump at this pressure for a short time. Then set the required operating
pressure.
- Diaphragm pump / plant is ready for operation.
LOW LOCAL TEMPERATURE
If commissioning or operation is carried out at a local temperature around 10 °C the compressed air
should be supplied with anti-freezer from a dosing apparatus (compressed air oiler).
We recommend ethylene glycol, diluted, with high-pressure additives, 1000 ml , article no. 75682
114002).
IMPORTANT INFORMATION CONCERNING COMMISSIONING AND
OPERATION
The diaphragm pump should only be dry operated for short periods of time under
supervision and with low air inlet pressure.
Dry operation after the material has passed through must be strictly avoided. It will damage
or destroy important component parts.
Continuous operation with high stroke frequency leads to extensive icing of control system
(increased pulsation until diaphragm pump shutdown) (see technical product description B.
6.50.80-P-GB, page 03) and leads to a decrease in service life.
Do not remove and replace the suction pipe or hose during operation.
- If air gets into the system this may e.g. lead to poor painting.

15 B.6.50.80-B-GB
Never immerse a running propeller into a filled container.

Increase the agitator propeller rotation slowly.
Personal safety equipment (breathing apparatus, goggles, gloves, etc.) must be worn when
working with material that is dangerous to health.
Never point the spraying equipment at people or animals.
OPERATION
The diaphragm pumps run automatically, i.e. during operational shutdown (no material drawn out of
pressure system) pumping will stop.
It is therefore recommended that the pump be disconnected from the air supply overnight or at the
weekend and, if possible, material pressure be reduced by withdrawal (after the air is disconnected.)
This can be achieved by using a spray device for example.
Before long-term shutdown, e.g. company holidays, pumps carrying paint should be flushed. In
order to avoid the hardening of paint residue the detergent should remain in the pump during
shutdown.
We recommend an alkyl sulfon acidic detergent for long-term shutdowns, e.g. "ASE".
Consult the material supplier concerning the compatibility of the detergent.
NITRO thinners or cleanser should not be used as detergent.
MAINTENANCE AND INSPECTION, REPAIR
MAINTENANCE AND INSPECTION
003.175-DP DIAPHRAGM PUMPS REQUIRE LITTLE MAINTENANCE.

16 B.6.50.80-B-GB
To avoid increased wear and tear of control components
through contaminated air a filter Dis fitted to the compressed
air connection of the diaphragm pump. If the stroke frequency
decreases over time this should be cleaned.
- to clean, simply unscrew compressed air connection with
filter.
The pump diaphragms become fatigued due to flexing work, and are subject to natural wear.
We recommend carrying out a safety inspection or if necessary exchanging the diaphragm
at regular intervals to prevent diaphragm breakage.
 Always replace both diaphragms.
 If there is no automatic drainage of water from the compressed air supply, condensation
water should be let out daily from the pressure tank, filter and filter regulator.
 When using anti-freezer (operating at 10 °C) replenish after use.
 The diaphragm safety valve must be checked for functionality once a year. This entails
exceeding the maximum permissible operating pressure slightly (opening pressure up to
1.1 times the maximum permissible operating pressure).
 The service life of the hose lines is adversely affected, and thus shortened, by surrounding
influences (oxygen in air, temperature, light, etc.), even if correctly. It is recommended that
they undergo regular visual checks and occasional checking of performance. As a
precaution the hose lines should be replaced at intervals set by the operator (- after 2 to 3
years).
Do not carry out any dismantling work on a diaphragm pump that is under pressure.
Regularly watch the diaphragm pump during operation!
Abnormalities such as:
 major pressure fluctuations
 changes in running sound
 irregular running
are normally signs that the diaphragm and control components are in an advanced state of wear.
A timely renewal prevents consequential damage.
Fig. 14

17 B.6.50.80-B-GB

Always replace both diaphragms.
(see breakdown effect analysis, page 22)
REPAIR
Repairs must be carried out by qualified personnel (experts). (VBG 87).
After dismantling, all parts which are to be reused should be cleaned thoroughly.
Do not damage sealing surfaces; therefore do not throw parts around or knock them.
Do not use any tension tools.
Check all PE sealing rings thoroughly for damage, replace if necessary. Always replace any
FPM O-rings which have been dismantled.
Apply lubricant to all threads and fits with lubricant before assembling (lightly grease), and
on no account use grease containing silicone.
Compressed air supply to diaphragm pump must be interrupted and the pump made free
from pressure before any dismantling work.
When traces of wear can be seen on running or sealing surfaces the components affected
must be exchanged.
Only our (the manufacturer’s) replacement parts may be used.
Our replacement obligation for the pumps and equipment no longer applies if replacement
parts other than ours are used
(
Produkthaftun
g
s
g
esetz/Product Liabilit
y
Law of 15 Dec 1989
)

18 B.6.50.80-B-GB
REPLACING THE DIAPHRAGMS

Remove both housing covers by first removing
the appropriate cheese head screws (valve
housing, connection parts and casing do not
need to be removed).

Loosen the diaphragms by hand one after
the other and unscrew.
If one of the pins bl or cl rotates during this
movement feed an open-ended spanner SW13
under the diaphragm and hold it against the
rotation. Before this, push the linkage for the
diaphragm to be removed across.

Check the pin connections for tight fit using
two spanners.
 Tighten the new diaphragm lightly only by
hand.
Do not use any tools such as pliers to do this.
Replacement diaphragms should be stored in dry, cool, dust-free and dark places, and not longer
than 8 months to avoid material ageing.
REPLACEMENT OF CONTROLS
 Remove front valve housing with connection pieces.
 Remove casing.
 Unscrew cheese head screws 1.
 Remove plate 2with seal 3.
 Lift out close sliding seat 4using two screwdrivers.
 Remove flat slide 5.
 Remove safety rings 6.
 Screw cheese head screw 1into its stop 7, then pull it out.
 Remove safety ring 8and press the bush 9out from inside.
 Push out the drive pin bl.
Fig. 15