Oertzen M 240 User manual

To be read carefully before start-up!
Operation Manual
M 240
von Oertzen GmbH • Ferdinand-Harten-Str. 10 • 22949 Ammersbek • Tel. [phone] • Fax [phone]
www.oertzen-gmbh.de • [e-mail]

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Table of Content
1. Introduction page 3
2. Safety Instructions pages 4 – 5
3. Configuration/Illustration pages 6 – 7
4. Start-up/Operation/Shut-down pages 8 – 11
5. Maintenance and Care pages 12 – 14
6. Technical Data page 15
7. Trouble-Shooting pages 16
8. Declaration of Conformity page 17
M240-06/06-AG

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1. Introduction
By buying the OERTZEN equipment you have purchased one of the most
durable and reliable high pressure cleaners available on the market. Its
balanced ratio of water flow (temperature) and working pressure perfectly
meets all cleaning requirements. The OERTZEN high pressure cleaners and
accessories conform to all European safety regulations which is guaranteed by
the CE symbol on the type plate. A Declaration of Conformity is part of this
manual.
•This manual to be made available to the operating personnel and to be
read completely before start-up. We point out that we cannot be held
responsible for any damage or malfunctions as a result of neglecting
this manual.
•According to the Directive for Use of Liquid Blasters (ZH 1/406) the
machine described in this manual to be inspected every year by
qualified personnel. Inspection results to be recorded and to be made
available to authorities their on request. OERTZEN offers qualified
service personnel to carry out safety inspections at attractive prices.
•The packing materials (plastic foil, wood, cardboard boxes, nails etc.)
are potentially dangerous, should be kept away from children and
disposed according to environmental requirements.
This symbol appears at all operating and safety instructions
dealing with risks for personal entirety and life.
This warning symbol appears in the operating manual at all
operating safety instructions dealing with risks due to electric
power.
This symbol appears at all operating and safety instructions
dealing with the fulfilment of rules, regulations and instructions for
the proper operation and destruction of the machine.
This manual is subject to technical alteration.
All rights reserved. Any use in other than legally authorised cases requires the
written approval of ARNDT H. von OERTZEN (GmbH&Co).

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2. Safety Instructions
The following instructions to be followed before, during and after work:
This instruction manual to be read completely before initial start-up. If strictly followed,
no danger should occur.
This machine must only be run by qualified adult persons who are fully aware of
possible danger. Directives ZH 1/406 and BGV D 15, as well as relevant national
safety rules to be followed.
The machine is not suitable for unattended operation and must be operated according
to specification and intended purpose. Protective clothing to be worn.
The water jet emerging from the spray pistol has a dangerous cutting effect. There-
fore the water jet must never be directed onto persons, animals or electrical installa-
tions. It must never be used for cleaning of clothes, footwear and the like. Be aware of
torque and recoil. Ensure stable foothold.
The max. allowed pressure which is stated on the type plate must not be exceeded.
The safety/control valve opens, if the max. operating pressure is exceeded by more
than 10 % and returns the water back into the suction side of the high pressure pump.
The safety/control valve is workshop-set and sealed. Adjustment must not be
changed.
Machines driven by combustion engines must not be run indoors unless proper
ventilation and exhaust gas evacuation are guaranteed. Exhaust gas is harmful,
excessive concentration of carbon monoxide is lethal.
Unsuitable respectively defective high pressure hoses often cause severe accidents
during operation. Therefore high pressure hoses to be carefully inspected before
start-up and replaced by original OERTZEN equipment in case of damage. Use of
other than original OERTZEN equipment (hand nut marked with OERTZEN), results
in expiry of the EC Declaration of Conformity, as well as product liability and warranty.
Used or damaged high pressure hoses must never be repaired and reused but to be
replaced by original OERTZEN equipment.
Spray pistols with delayed closing mechanism must not be used because of risk of
injuries.
Lever in open position must never be blocked or fixed in any way.
Use of spray wands of a length below 750 mm is prohibited.
The machine must not be run in areas jeopardized by fire or explosions. During
operation at filling stations “Technical Rules for flammable Liquids” (TfbF) to be
observed.
Consumables to be handled thoroughly according to technical rules and safety and
environmental regulations to be observed.

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Before opening the machine in case of malfunction or emergency, switch off by
means of the ON/OFF respectively the EMERGENCY STOP switch.
Electric power can cause serious danger. All symptoms of defective electrical
components to be taken seriously and eliminated immediately. Repair works only to
be carried out by qualified personnel.
Make sure that the machine cannot move. If the unit is equipped with a parking brake,
it must be set during working.
When using drain cleaning hoses, observe safety marks during pushing in and/or
pulling out (approx. 50 cm). Strictly follow instructions in chapter "Drain Cleaning".
During loading hoisting device to be fastened properly at jack rings. Ensure balanced
load distribution.
The exhaust evacuation area is hot! Do not touch!
Repair work in the high pressure section of the machine (pump, hoses, piping) only to
be carried out by qualified personnel.
After work the machine to be locked and secured against unauthorized/accidental
operation by means of the safety lever.
Use of equipment and/or consumables which is/are not delivered or expres-
sively approved by OERTZEN results in expiry of the EC Declaration of
Conformity, as well as product liability and warranty.

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3. Configuration/Illustration
The machines of the Mobile series consist of a low speed, oil-greased high
pressure inline plunger pump, driven by a low-emission 4-stroke petrol engine
in V-design. An oil-greased reduction gear flanged between pump and motor
reduces the high pressure pump speed. In order to extend the engine lifetime,
an oil shortage cut-out is installed, which switches off the engine in case the oil
level drops below specified limits.
An oil greased reduction gear which is flanged between high pressure pump
and petrol engine reduces the high pressure pump speed and so extends the
lifespan of the pump.
The feed water is fed into the high pressure pump via a pre-filter (1) which – in
connection with the correct spray nozzle – boosts the pressure up to the
adjusted/required working pressure.
A sealed safety/control valve which is arranged downstreams of the high
pressure pump opens as soon as the operating pressure is exceeded by more
than 10 % and returns the water which cannot be taken by then nozzle back
into the suction line of the high pressure pump. In parallel, it allows to
continuously adjust working pressure and water flow.
By opening the rotary handle at the double lance the working pressure can be
adjusted as required.
The machine is equipped with a circulation shut-off system and additionally
with a thermo valve in order to protect the pump against overheating. After
closing the spray pistol the safety/control valve opens, and returns the circu-
lating water back into the suction line. If the temperature of the circulating
water exceeds 60 °C, the thermo valve opens, releases small amounts of hot
water and allows cold water to enter. Re-starting and immediate generation of
required/adjusted working pressure is achieved by opening the spray pistol
again, allowing to continue the cleaning task without delay.
The range of applications can be extended by a variety of accessories
available. Contact your local distributor.

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3 safety/control valve
4 pressure gauge
6 water inlet/pre-filter
8 high pressure pump
11 high pressure water outlet
12 dip stick/oil filler high pressure pump (see page 13)
37 fuel tank
37 a fuel cock
39 exhaust pipe
40 air filter
47 a dip stick combustion engine
49 speed adjustment
51 choke
52 starter handle
53 override switch
54 ignition switch

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4. Start-up / Shut-down
Before every Start-up:
Read and observe operation manual.
In order to guarantee proper function and trouble-free operation,
the following checks to be carried out before start-up:
•General condition of the unit (connections, gaskets, etc.).
•High pressure hoses, hose pipes, whether damaged.
•Air supply, fresh air grill must not be covered.
•Filling of consumables.
•Correct oil level of high pressure pump (sight glass/dip stick). Correct oil
level of the reduction gear (sight glass/dip stick), correct oil level of
combustion engine (dip stick). Only oil qualities approved by OERTZEN
to be used. High pressure pump: special pump oil OERTZEN OSP,
reduction gear: special pump oil OERTZEN OSP, combustion engine:
OERTZEN special motor oil OSM.
•Pump/pump connections whether leaking.
•Machine only to be run with absolutely clean water. Before connecting
the water supply hose, rinse it thoroughly. Depending on feed water
quality, regularly check water filter in short intervals, replace if needed.
•Machine only to be run horizontally (+/- 5°).
•In order to extend the lifetime of the combustion engine, engine to be
warmed up for a few minutes during starting procedure and to run out
during shut-down for cooling purposes.
In order to guarantee proper function and trouble-free operation,
the following checks to be carried out during working:
•Observe function of indicator lights/monitors.
•Observe pressure variations
•Observe leaks at high pressure pump, hose pipes, connections.
•Observe excessive exhaust formation/smoke development.
In case of malfunctions immediately stop machine, eliminate cause
according to chapter „Trouble Shooting“, call qualified service.

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Connections
Water Supply
Connect water inlet (6) of the machine to water source with a clean hose
(diameter see table page 9). Before connecting water supply hose, rinse it
thoroughly. In case of connection to the potable water distribution, observe
DIN 1988 (for momentary connections use a backflow preventer with non-
return function and ventilation).
Flow pressure Min. flow rate *
minimum: 2 bar 15 l/min " water supply hose
maximum: 8 bar 21 l/min 1" water supply hose
30 l/min 1 " water supply hose
* see Technical Data
Insufficient water supply will cause heavy damage on high
pressure pump (cavitation).
High Pressure Connection
Connect high pressure hose to high pressure outlet (11) by means of the hand
nut without using tools.
Fuel Supply
Fuel tank (37) to be filled with fuel (min. 86 octane). Properly lock tank.
Gasoline and gasoline vapour are highly flammable and explosive. Fire and
explosions may cause severe injuries or death. Fuel never to be handled near
hot engines.
Fuel to be handled with care. Observe engine manufacturer’s
instructions.

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Operation
For starting the combustion engine, observe engine
manufacturer’s instructions.
Never disconnect starter battery when engine is running. In order
to ease start-up of the engine, open safety/control valve (3) by
turning the hand wheel counter-clockwise for pressure relief
purposes.
•Fully open water source, respectively dip in suction hose with
strainer.
•Open fuel cock.
•Put ignition switch (54) into position "1".
Rope Start – Cold Engine:
•Put choke (51) into start position/fully pull out choke (depending
on design).
•Turn gas pedal (49) into full load position.
•Keep override switch (53) pressed during start procedure.
•Take handle and carefully pull out until engagement, then
strongly pull out in order to start motor. Put handle slowly back
into initial position.
•Slowly open choke during engine warm-up in order to avoid
dying down of the motor during load alternation. Open spray
pistol and warm up engine at low pressure for a few minutes.
•Afterwards, increase pressure to maximum by turning the hand
wheel of the safety/control valve (3) clockwise.
Be aware of significant recoil. Ensure stable foothold.
Rope Start – Hot Motor:
•Do not actuate choke (51).
•Turn gas pedal (49) into load up to full load position.
•Keep override switch (53) pressed during start procedure.
•Take handle and carefully pull out until engagement, then strongly pull
out in order to start motor. Put handle slowly back into initial position.
•After engine has started, turn gas pedal (49) into full load position.
•Open spray pistol
•Then increase pressure to maximum by turning the hand wheel of the
safety/control valve (3) clockwise.
Be aware of significant recoil. Ensure stable foothold.

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Pressure/Flow Regulation
Pressure and flow rate can continuously be adjusted as required at the hand
wheel of the safety control valve.
Counter-clockwise: continuous pressure and flow reduction to minimum
capacity
Clockwise: continuous pressure and flow increase to maximum
capacity
When pistol is closed, machine is running in circulation mode. If
water temperature exceeds 60 °C, thermo valve (14) opens,
releases small amounts of hot water and cold water enters.
Detergent Mode
Only if Injector Kit is installed. The injector is activated at fully opened spray
wand. The suction rate is 10 % of the water flow. For lower flow rates the
detergent to be pre-diluted (e.g. 5 % requires a 1 : 1 pre-dilution of detergent).
Fully open valve at the double lance and open spray pistol. The injector is
activated and automatically injects detergent into the water stream. Detergent
to work in for a few minutes. Close valve at the double lance (injector is
deactivated) and wash cleaning object from top to bottom by means of the
water jet. Keep spray distance of 10 – 20 cm. Detergent residues to be flushed
from cleaning object completely. Do not spray detergent onto hot surfaces or
in blazing sunlight. Detergent must not dry.
After work detergent line to be flushed thoroughly. Put detergent suction hose
into clean water and run machine with open valve at double lance for approx.
one minute.
After Work
In order to reduce motor stressing, decrease working pressure by turning the
hand wheel of the safety/control valve (3).
•Close and lock spray pistol.
•Stop motor: Turn ignition switch into position “0”.
•Close fuel cock (37 a).
•Thoroughly clean high pressure hose. In case of
damage (cuts, abrasions, kinks) replace high pressure hose for
safety reasons.
•Only original OERTZEN high pressure hoses to be used.
Otherwise Declaration of Conformity and warranty will expire.
•Reel up high pressure hose properly without any loops.
•Store machine and accessories in a dry, frost-protected area.
•Drain pump completely in case of extended shut-down periods.
•Drain pump in case of extended shut-down periods.
Particularly note:
In case of malfunctions, eliminate cause according to chapter „Trouble
Shooting“, call qualified service. In case frost is likely, frost protection to be
carried out (see chapter „Maintenance and Care“), otherwise severe damage
will be the result.

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5. Maintenance and Care
Every machine is only as reliable as maintenance is carried out.
In order to guarantee reliability and trouble free operation of the
machine, it is of vital interest to follow the instructions below:
Ignoring the required maintenance intervals voids all warranty.
Combustion Engine
Maintenance instructions of motor manufacturer to be strictly followed.
Exclusively OERTZEN OSM motor oil to be used. Use of oil qualities
not approved by OERTZEN voids all warranty.
Reduction Gear
First oil change after 50 operating hours, all further oil changes every 500
operating hours, min. once a year. Correct oil level to be checked every day.
Exclusively OSP pump oil to be used. Use of oil qualities not approved by
OERTZEN voids all warranty.
High Pressure Pump
First oil change after 50 operating hours, all further oil changes every 500
operating hours, min. once a year. In case the oil is getting turbid, stop the
machine and carry out oil change. If oil is getting turbid again, call qualified
service personnel
Exclusively OSP pump oil to be used. Use of oil qualities not approved
by OERTZEN voids all warranty.
.

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Water Strainer
The filter is arranged in the water inlet and must be inspected and cleaned
prior to start up. Change strainer, if needed.
Supply of polluted water or dirty strainer will cause severe damages on
the pump and unloader valve.
Frost Protection
Proper frost protection of the machine during storage and transport is
essential, in order to avoid severe damages and consequently dangers
during operation..
The best frost protection is to store the unit in a permanently frost-free
area.
If there is a risk of frost during storage and/or transport, the machine to
be protected as follows:
•2 l of a 1 : 1 water/frost protection liquid to be mixed in a clean
vessel, water connecting hose to be dipped into vessel, pump to be
started.
•Spray pistol to be opened and frost protection liquid to be returned
into the vessel, so circulating the liquid through the system.
•Spray pistol to be opened and closed several times, in order to also
fill the unloader valve with the liquid.
•High pressure pump to be stopped, all hoses to be disconnected.
•Machine is now protected against frost of approx. – 30 °C.
Ignoring the above instructions will cause severe damages on the
entire system.
In order to avoid pollution of the environment, frost protection
liquid must not be dumped, but collected and reused respectively
disposed as per relevant regulations.

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6. Technical Data
Technical Data Mobil 240 Mobil 240
from serial No. 5060201
Water consumption/adjustable 500 – 1020 l/h 500 – 1320 l/h
Max. operating pressure 260 bar 260 bar
Working pressure/adjustable 240 bar 240 bar
Power 14 HP/10,3 kW 14 HP/10,3 kW
Fuel consumption at full load 3,8 l/h 3,8 l/h
Tank volume 7 l 7 l
Oil shortage cut-out standard standard
Starting device rope rope
Dimensions (L x W x H mm) 720 x 640 x 610 mm
Weight (net) 105 kg 105 kg
Nozzle designation HIP 2333 HIP 1638
Recoil 64 N 81 N
Noise level Lp/Lw
acc. to DIN EN ISO 3744 79/86 dB(A) 79/86 dB(A)

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7. Trouble Shooting
Electrical energy can cause severe injuries. Devective electrical
components to be immediately replaced, possible causes for accidents
to be eliminated without delay
Any repair work must only be carried out by qualified personnel.
Only original OERTZEN equipment to be installed, as otherwise
warranty and Declaration of Conformity will be void, health and
safety standards are not guaranteed.
During repair or maintenance work, unit to be disconnected from
electrical network.
Faiure Cause Remedy
Motor stops - Fuel tank empty
- Motor oil low level
- Petrol filter blocked
- Sparking plug burnt
- Fill tank
- Fill up oil up to max. mark
- Clean/replace filter
- Replace sparking plug
Motor springt nicht an - Motor oil low level.
- Counter pressure high
- Battery exhaused
- Ignition switch in position "Off"
- Petrol cock closed
- Choke open
- Fill up oil up to max. mark.
- Release unloader valve
- Charge battery
- Put switch into position "On"
- Open petrol cock
- Close choke
Pump pressure high - Nozzle clogged - Clean remove and nozzle
Operating pressure not achived/
varies - Air in unit - Insufficient water supply
- Nozzle worn
- Incorrect nozzle
- Nozzle clogged
- Water strainer blocked
- Unloader valve leaking
- Suction side of pump leaking
- Suction valves sticking
- Vent unit
- Supply line to be min. ”
- Replace nozzle
- Install correct nozzle
- Remove/clean nozzle
- Clean filter
- Call service
- Tighten hose clamps
- Carefully loosen valves by
means of a scew driver, if
needed, remove and clean
valves.
Vibrations on high pressure hose
and spray pistol - Air in unit - Open handle on pistol unless continuous pressure is achieved
Heavy vibrations on unit - Plunger blocked
- Stop unit immediately, call service
No detergent injection - Detergent tank empty
- Dosing valve or regulating
handle closed
- Low pressure nozzel in double
lance blocked
- Non-return valve blocked
- Fill tank
- Open
- Remove and clean nozzle
- Blow compressed air into
detergent hose

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