Dual Pumps THOR DIESEL User guide

793-1275
Owners Handbook
pumps
tHORtHORtHOR
diesel

Pressure Washer
Operating Instructions
This manual and any other literature supplied should be read
thoroughly before attempting to operate the Power Washer. Pay
particular attention to any instructions relating to safety, and the
starting, stopping and maintenance of petrol and diesel engines.
This manual has been compiled to give all of the necessary information
to operate the Dual Pumps range of Pressure Washers safely and
effectively. It is recommended the manual and its accompanying
literature be read and understood before attempting to assemble or
operate the equipment. Following these simple instructions will ensure
operator safety and prolong the life of the power washer.
Our policy is to improve our products continuously and we therefore
reserve the right to discontinue or change specifications, models or
designs without notice or obligation.
THESE INSTRUCTIONS SHOULD BE KEPT
WITH THE MACHINE AT ALL TIMES.
1

2
2. Equipment:
This equipment has been designed and manufactured for the high pressure
washing of machinery, buildings etc.
It should not be used for washing electrical equipment, people, animals and
surfaces that are loose and easily damaged.
This manual deals with the following variants of pressure washers,
EC DECLARATION OF CONFORMITY
Dual Pumps Ltd
Unit 8, Hudson Road
Saxby Road Ind. Est.
Melton Mowbray
Leicestershire LE13 1BS
Declares that this equipment conforms to the following directives,
2006/42/EC, 2000/14/EC, 2014/30/EU
Tom Herridge
Technical Manager
1) Index Page
2) Equipment ........................................................................................................ 2 - 3
3) Safety ................................................................................................................ 3 - 5
4) Main Features ................................................................................................... 6 - 8
5) Installation ..............................................................................................................9
6) Operation ..............................................................................................................10
7) Lance Details ........................................................................................................10
8) Maintenance ................................................................................................. 11 - 14
9) Fault Finding .........................................................................................................15
10) Storage ...............................................................................................................15
11) Disposal ..............................................................................................................16
12) Warranty..............................................................................................................17
Model No Drive Flow
Lpm
Max
Pressure
Weight
Kg
Dimensions
L x W x H
*SPL
LwA dB
*GSPL
LwA dB Group
**TT41200DHE Diesel 23 hp 41 200 bar 200 1200x700x800 113 116 3-D
**TT30200DHE Diesel 23 hp 30 200 bar 200 1200x700x800 113 116 3-D
**TT29250DHE Diesel 23 hp 29 250 bar 200 1200x700x800 113 116 3-D
TT21350DHE Diesel 23 hp 21 350 bar 200 1200x700x800 113 116 3-D
TT18400DHE Diesel 23 hp 18 400 bar 200 1200x700x800 113 116 3-D
TT15500DHE Diesel 23 hp 15 500 bar 200 1200x700x800 113 116 3-D
*Diesel 23 hp 200 1200x700x800 113 116 3-D
*SPL = Sound Power Level on equipment representative for this type.
*GSPL = Guaranteed Sound Power Level for this equipment.
* Special Build ** Twin outlet versions

3
THOR Pressure Washer.
Please refer to the Engine Operating Instructions before starting this machine.
THOR standard specification:
l23 hp twin cylinder diesel engine c/w oil bath air cleaner, 7-lit fuel tank and key
start.
lGearbox driven 1450-rpm plunger pump.
lFrom 15-41 litres flow and maximum pressures of up to 200 to 500 bar.
(Depending on model)
lAdjustable pressure regulating valve with return to tank by-pass.
lPreset pressure safety valve.
lHigh-pressure gun and lance
l10m High-pressure hose with quick release coupling
lHose reel with 40m capacity. (Optional - Not Available on TT18400DHE,
TT21350 & TT15500)
lManual hand throttle for infinite speed settings.
lTwin auxiliary outlet ports for two accessories or one at rated flow.
(NOT TT18400DHE, TT21350 & TT15500)
lElectric start with no maintenance fully sealed patented dry pure lead battery.
lHour clock for monitoring service intervals and work rate.
lFour wheel trolley with low ground pressure tyres.
lWheel brake with positive spring loaded lock for on site stability.
lAccumulator for smooth operation and reduced operator fatigue.
(NOT TT18400DHE & TT21350DHE)
lFlexible drive coupling to reduce transmission wear.
lChemical facility not standard, retro fit on 200-250 Bar models only.
(Contact factory)
3. Safety:
Before operating this machine read all handbooks thoroughly paying special
attention to the safety sections in the Pressure Washer Hand Book.
Power washers should only be used by fully trained, competent persons. They should
not be used by untrained or inexperienced users.
Care should be taken when handling the pressure washers as they have uneven
centres of gravity and may topple over when lifted.
3.1 Suitable Persons
Operators should be physically fit and free from the influences of drugs or alcohol.
Prolonged periods of operation are strenuous and operators should be
encouraged to take regular breaks. If you have any doubts about your fitness to
operate this equipment, seek professional advice before proceeding.

4
3.2 Protective Clothing
Operators and assistants should wear the following Personal Protective clothing
and equipment: -
Waterproof boots with good non-slip soles
Waterproof overalls
Waterproof gloves
*Goggles or full-face protection to at least BS EN166
**Ear Muffs or Ear Plugs to give protection to at least EN352-1.
3.3 Use in confined spaces
Diesel engines produce fumes and toxic gases, use only in well-ventilated
spaces.
To prevent the build up of flammable vapours the charging of diesel tanks should
not be done in confined spaces. Any spillages should be cleaned up and any
absorbent material used should be disposed of in a proper manner.
3.4 General Safety
Check all hoses and couplings for tightness and damage, loose connections
should be tightened and damaged hoses replaced.
Ensure the workspace is clear and free from obstructions; consideration should
be given to the erection of fences or sheeting to prevent injury to others.
High-pressure lances react ‘Kick Back’ when the operating trigger is pulled.
Ensure you have a good firm footing and anticipate this reaction.
Extra care should be taken when working at heights, scaffolding should be
in good condition, secure and properly fenced, working from ladders is not
recommended.
The high-pressure stream can be dangerous, do not point the stream directly at
others or submit them to the fine over-spray.
3.5 Control of Vibration at Work Regulations 2005
This machine in its standard form dose not exceed the 2.5 m/s² vibration action
value and should not require any daily limitations to it’s use. Periodic equipment
checks and servicing will maintain the characteristics and efficiency of this machine.
Warning:
Any modifications or accessories added or used with this machine may affect
the vibration levels. Under the Control of Vibration at Work Regulations it is the
employers duty to manage the exposure to vibration and implement training
and health surveillance for employees.
Under the Supply of Machinery (Safety) Regulations1992 (SMSR), you should
ensure equipment is in good condition and maintained in accordance with the

5
manufacturers instructions, any modifications or accessories added to this
machine should be assessed for safe operation and vibration, then implement
appropriate measures.
3.6 Accessories
Switch off machine and relieve lance pressure before attaching or removing
accessories.
Warning: Check accessory equipment is of the correct specification be-
fore attaching and operating. Serious personal injury, death or damage to
the machine could occur if this is not carried out. If in doubt contact your
dealer
Always refit auxiliary outlet blanking plugs after removing accessories and
before starting machine. (Check blanking plugs are securely located before
starting machine). (TWIN OUTLET VERSIONS ONLY)
Extra safety considerations should be given when operating with two people.
Always assess your working environment and consider your working col-
league.
If you have any doubts about your fitness to operate this equipment, seek
professional advice before proceeding.
* Note: Goggles or Full Face Protection.
The wearing of eye and face protection in hazardous areas is a requirement under regulation
4 of the personal protective equipment at work regulations 1992.
Regulation 4 requires employers to provide suitable personal protective equipment to
employees who may be exposed to risks affecting their health and safety.
Full Face Protection.
High speed flying partials or chemical splashes are rarely aimed directly at the eyes. A full face
visor offers the maximum protection in extreme conditions. Full face shields offer a wide area of
protection and because of the all round ventilation, remain mist free even in wide temperatures
swings.
Chemical Splash.
Chemical splashes and vapours can hit you from all sides. It’s important that full eye
enclosure is selected, e.g. Unvented goggles. Full face shields will also protect the whole
face from liquid splashes. Those with chin guards should be selected where there is a
danger of splash deflecting up from work surfaces.
Impact.
Impact hazards are caused by fast moving particles from the cleaning operation. The
potential impact speed must be assessed before selecting the most appropriate protection. Safety
glasses could be dislodged by high velocity impacts, in which case goggles or face shield should
be selected.
** Note: Ear Muffs or Ear Plugs.
The noise at work regulations require that from February 2006 persons working in noise
levels between 80dBA and 85dBA must be provided with suitable hearing protection on
request. If noise levels are above 85dBA then hearing protection must be supplied and worn.
Personal Protective Equipment Guide

6
Lance
Storage Hook
4. Main Features
Pump
Fuel Warning
Sticker
Unique Torsional
Flexible Coupling
Service
Schedule
Sticker
Engine
Cooling
Air Inlet
Ignition
Switch
Throttle
Lever
Engine
Stop
Wheel Brake with
Positive Spring
Loaded Lock for
on Site Stability
Four Wheel Trolley
with Pneumatic
Low Ground
Pressure Tyres
Engine Oil Dipstick
*Fuel Spillage
Drain Tap
Tyre Air Valve
Battery
Gearbox Oil
Sight Glass
Engine
Control Box
Pulsation
Dampener
Safety Relief
Valve
Water Inlet
Suction Barb
High Pressure
Water Outlet
Exhaust Heat
Guard Diesel Tank
High Pressure
Lance
Diesel Spillage
Tray
Personal Protective
Clothing Sticker
Rear Pump Oil
Sight Glass Four Point
Super-Flex
Mounting
Fuel Spillage Drain Hose
(Open Tap* and Drain into
Appropriate Receptical,
Warning Do Not Re-Use)
Dispose of Ensuring Compliance
with Local and National
Regulations
Twin Outlet Ports
and Blanking Plug
(No.4)
Fig 1
Fig 3
Water Pressure
Regulating Valve
Increase Pressure
(do not exceed the machines
rated pressure)
Decrease Pressure
Water Inlet
Suction
Barb
(No.1)
HP Lance to Hose
Connection
(No.4)
Water By-pass
Barb (No.2)
Safety Relief
Valve

7
4. Main Features
Optional Hose
Reel Mounting
Plate
Air Intake
Engine Oil
Filler Plug
Diesel Tank
Filler Cap
Gearbox
Dipstick
& Filler Cap
Pump Dipstick
& Filler Cap
Water Inlet
Barb (No.1)
Pump Oil Level
Sight Glass
Gearbox
Diesel
Fuel Filter
Engine
Oil Filter
Fuel
Pump
Warning Hot
Exhaust Sticker
Engine
Exhaust
Oil Bath
Air Filter
Engine Pull-Stop
Knob
Manual Throttle
Lever
Relieve Lance
Pressure Before
Starting Sticker
Hour
Clock
Engine Oil
Warning Light
Battery Charge
Warning Lights
Ignition Key
Engine Start
Check Oils
Daily Sticker
Water Inlet
Filter (No.5)
Fig 2
Fig 4
Engine Temperature
Light (When Fitted)
Water By-pass
Barb (No.2)

8
4. Main Features - TT18400DHE & TT21350DHE
Pressure Gauge
Water Inlet Filter
Outlet Port
High Pressure
Coupling and Hose
(No. 4)
Safety Valve
Water Inlet Hose
and Barb (No.1)
Return Water By-Pass
Hose (No.2)
Gearbox Oil
Filter and
Dipstick
Accumulator
Pressure Regulating Valve (No.3)
Decrease Pressure
Increase Pressure
(do not exceed the machines
rated pressure)
TT15500DHE
Pump
Dipstick
& Filler Cap Outlet
Port
(No.4)
Safety
Valve
Water Inlet Filter (No.5)
& Hose Barb
Connection (No.1)
Water By-Pass Hose
Connection (No.2)
Gearbox
Dipstick
& Filler Cap
Gearbox Pump
Fig 5
Water Pressure
Regulating Valve
(No.3)
Increase Pressure
(do not exceed the machines
rated pressure)
Decrease Pressure

5. Installation
5.1 From the pump and gearbox (if fitted) remove the ‘Red’ travel plugs, replacing
them with the yellow-topped dipsticks. Check all oil levels, top up
if necessary.
5.2 Check the engine oil level and fill the fuel tank with diesel, see engine
manufacturers handbook for details of oil and fuel types.
5.3 Connect the battery leads. (Red to + Earth to -).
5.4 Connect the suction hose to the Power Washer (Fig 2, 3 & 5 Water Inlet Hose
Barb No.1). Ensure the connection has no air leaks. Air leaks on the suction
hose connection will impair the performance of the machine.
5.5 Connect the water return line to its connector and place the other end in
the water supply container. (Fig 2, 3, 5 & 6 Water By-pass Hose No.2).
5.6 Submerge the opposite end of the suction hose and its suction filter in a
suitable container containing the water supply. Ensure the filter is always kept
below the water level. (Fig 6)
5.7 Connect the high-pressure hose to the outlet port, power washer and lance
(Fig 3, 5 & 7) No.4. Ensure that the trigger safety catch is in the ON position
whilst making these connections. (Fig 7)
Note: Engine speed fluctuating is normal until all air is purged from the system;
if this persists check suction hose for damage, air tightness of connections and
check that the water holding tank is full. Filters should be checked regularly to
ensure a free flow into the pump. (Fig 2 & 6) No.5
Warning: Serious damage will occur to the pump and associated equipment if
filters are not kept clean or the machine is run without water.
None standard accessories fitted to this machine will need nozzles matched to suit
the pump performance. Example: 30 Lpm flow split between the two
auxiliary outlets will provide 15 lpm per outlet, at rated pump pressure.
Note: If in doubt contact your dealer for advice on accessory suitability
before attaching anything to this machine.
9
Submerge the suction hose and
return hose into water container.
Connect the High-Pressure
Hose to the Lance.
(subject to nal manufacturers specications)
Fig 6 Fig 7
NOTE
KEEP SUCTION FILTER CLEAN
Return
Suction
(No.5) (No.2)

+
–
High Pressure Jet
Single Lance with High
Pressure Nozzle Safety Lock
7. Lance & Nozzle Details (optional)
*NOTE
Low Pressure Nozzle
Head for Chemical
Induction
(Optional ART410)
(not included with E100 skid units see final manufacturers specifications)
Nozzle Sizes - for maximum pressure & performance
Flow Pressure Nozzle Size
29 250 25° 08 Jet
30 200 25° 10 Jet
41 200 25° 15 Jet
18 400 20° 1.19mm Jet Tungsten Carbide
15 500 20° 1.04mm Jet Tungsten Carbide
21 350 15° 05 Jet
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6. Operation
6.1 Start engine (Note: Depress the lance trigger to release water pressure
before starting the engine).
Refer to accompanying booklet relating to the type of engine fitted.
6.2 Using High Pressure Lance (Note: See Section 7 for lance type and operation)
Release the lance safety catch, which is located behind the trigger.
6.2.2 Point the lance downwards and towards the object being cleaned.
6.2.3 Squeeze, the trigger to start the high-pressure jet, proceed to wash
the object. Adjust the working pressure by turning the pressure
regulator knob + or - to suit the application (Fig 3 & 5, Water
Pressure Regulating Valve No.3).
Never direct the high-pressure stream at the engine or pump as
this could cause irreparable damage.
WARNING: -High-pressure lances react ‘Kick Back’ when the operating
trigger is pulled. Ensure you have a good firm footing and anticipate this reaction.
6.2.4 Release the trigger to stop the high-pressure jet.
6.3 Washing using detergent NOT Supplied with machine
(Optional up to 250 BAR only)
6.4 Switching Off
Release trigger.
Stop drive engine, (refer to engine handbook supplied, relating to the type
fitted, remembering to switch off ignition after use to prevent draining the
battery) Depress the high-pressure lance’s trigger to release the pressure in
the high-pressure hose.
Disconnect water supply.
WARNING: Do not let the pump idle in By-Pass for lengthy periods, if you
intend to break from work for more than 5 minutes, switch the machine off.
Running power washers should never be left unattended.

11
Activity Each/
First Use
3 months or
first 50 Hours
12 months or
250 hours
500
hours
Inspect / top up oil levels
Engine *
Gearbox *
Pump *
Air Filter and Oil Bath Level *
Change Oil
Gearbox (SAE90 Gear Oil) * *
Pump (SAE20/30 Pump Oil) * *
(Change engine oil and filter (use SAE 15/40
Diesel Multigrade) in-line with the engine
manufacturers recommendation), or at -
* *
Clean water inlet filter on suction hose
Clean secondary water filter *
*
Air Filter
Check and Clean *
Check Oil Level *
Change Oil * *
Inspect high-pressure hose and its connection
for tightness and damage *
Inspect suction hose and its connections for
tightness and damage *
High Pressure Jet
Inspect *
Change *
Pneumatic tyres
Check/Inflate tyre pressures (2.0bar, 30psi)
*
*
Fuel Filter
Check (See Page 12)
Change Filter at (or sooner if contaminated)
*
*
8. Maintenance Schedule
8. Maintenance
Diesel Fuel Filler Cap Diesel Spillage TrayDiesel Tank Filler Engine Oil Dipstick

12
8. Maintenance
Diesel Spillage
Drain Hose
Drain into Appropriate
Receptical. Warning Do
Not Re-Use! Dispose of
Ensuring Compliance
with Local and National
Regulations
Split Diesel Drain
Tap. In Off Position
Diesel Spillage
Drain Hose
Secondary Water Filter
See maintenance schedule.
Check the inlet filter is clean Odyssey AGM Dry Maintenance Free Battery
(Clean and check tightness of connections)
Fuel Filter Engine Cooling Fan
(keep mesh clear at all times)
Fuel Lift Pump
Engine Oil Filter
(refer to maintenance schedule and engine
handbook. Dispose of in accordance with
local authority regulations)
Engine Oil Drain Plug
(Dispose of oil in accordance
with local authority regulations)

13
8. Maintenance
Gearbox & Pump Oil
Filler & Dipsticks
Air Filter Maintenance Indicator
(refer to engine handbook and
maintenance schedule)
Engine
Oil Filler
Engine Oil Drain Plug
(Dispose of oil in
accordance with local
authority regulations)
Gearbox & Pump Oil
Level Sight Glasses
Air Filter
Air Inlet
Wheel Brake
(apply when servicing
machine)
Manual
Throttle
Engine
Pull Stop
(refer to maintenance schedule)
Air
Filter
Air Filter Oil Bath
(refer to maintenance schedule and en-
gine handbook. Dispose of in accordance
with local authority regulations)
Ignition Key
Engine Start
Hour
Clock
Engine Oil Pressure
Warning Light
Battery Charge
Warning Light

14
8. Maintenance
Pump Oil
Drain Plug
Wheel Brake
(Grease Plunger and Spring)
Suction Filter
High Pressure
Nozzle
Gearbox
Oil Drain Plug
Suction Hose
Nozzle
Protector
Tyre Air Valve
(Tyre pressure 30psi / 2 bar)
(Dispose of oil in accordance with
local authority regulations) (replace any of the above if signs of damage)
(replace worn nozzle or
refer to maintenance schedule)
By-Pass Hose

15
Symptom Possible Cause Remedy
Pump running normally
but pressure low.
Pressure Regulator valve
Pump sucking air.
Check and adjust
Check water supply and
possible air ingress.
Nozzle badly worn Check and/or replace
Worn piston packing Seek professional advice
Fluctuating pressure Blocked water filter Check filter, clean or
replace if necessary.
Pump sucking air Check integrity of suction
hose and connections.
Pressure low after a long
period of normal use. Nozzle badly worn Check and/or replace
Pump noisy. Pump sucking air Check integrity of suction
hose and connections.
Excessive temperature of Reduce temperature to
liquid in pump below 60ºC, do not allow
pump to idle for long periods.
Blocked water filter Check filter, clean or
replace if necessary.
Worn bearing or valves Seek professional advice
Presence of water in oil. Ingress through breathers Replace oil, do not wash
engine or pump
Worn oil seals Seek professional advice
Water dripping from under pump. Worn piston packing Seek professional advice
Oil dripping from
pump/gearbox/engine. Worn oil seal Seek professional advice
Excessive vibration in Water supply low Check adequacy of water
lance/delivery line. supply. Ensure suction
filter is below water level.
Ingress of air into suction Check integrity of suction
line hose and connections.
Irregular functioning of Seek professional advice
valves
Blocked water filter Check filter, clean or
replace if necessary.
9. Fault Finding
10. Storage
Disconnect pressure hose and lance, draining water from the hose.
Disconnect water feed hose, draining water from the hose.
Wash out detergent hose with clean water, draining water from the hose.
Turn over the engine to expel water from pump.
Ensure the equipment is clean and dry before storage.
The equipment should be stored in a dry and frost proof place.

16
11. Disposal
12.1 At the end of its use life this pump unit must be disposed of in a responsible
manner following any specific requirements of the local authority in which the
pump unit is located.
12.2 Drain any unused fuel from the fuel tank and the residual engine and
lubricating oils. Dispose of these oils in a manner, which is acceptable to
your local authority.
Do not dispose of by allowing them to drain into a sewer or watercourse or
pollute land.
12.3 Remover the plastic components, dispose of by recycling or in general
refuse whichever is the locally approved manner.
12.4 Metallic parts should be sent for recycling via an approved metal merchant.
12.5 Any fitted tyres should be removed from their rims and sent for recycling via
an approved contractor.

17
12. Warranty
Limited Warranty Supplied by Dual Pumps Ltd
For warranty terms refer to Section 7 of our Terms and Conditions at
www.dualpumps.co.uk/company/legal
or
scan the QR code

Unit 8, Hudson Road
Saxby Road Ind. Est.
Melton Mowbray
Leicestershire LE13 1BS
Telephone: [phone] Fax: [phone]
E-mail: [email protected] www.dualpumps.co.uk
pumps
DP-TPWH-V1.01-03/20