Easy-Kleen MAGGOLD User manual

OH S ER I E S
Easy-Kleen Pressure Systems LT D.
41 Earnhardt Road
Sussex Corner NB
E4E 6A1
1 800 315 5533
MAGGOLD
MAGPLUS
MAG4000
MAGELE

2
Details
• The burner is set to produce the proper amount of temperature rise for 3.6 GPM
• Decreasing the pressure changes the GPM to the point where you have to compensate by:
1. Increasing the no le si e in order to increase the GPM
2.
Decrease the thermostat setting because the burner is heating less water
Contact Easy Kleen for kit to adjust pressure 1-800-315-5533 ext.1, Kevin Reid
• If these adjustments are not made, this may produce steam
• Steam is Dangerous
• The high pressure hose, trigger gun, no les, filters, valves, o-rings, and brass fittings are not rated
for steam and may fail causing serious injury or death.

3
These pressure washers are identical with the exception of type of gasoline engine
used (recoil start electric start) and whether the burner’s are powered by 12V from
the gasoline engine or from line power @ 120V AC. For marketing purposes the
paint and decal colours vary.
M od e l
Bu r n e r
Orifice Burner V
o l t a g e
OH-200 1.65 120 V AC
OH-200-12v 1.65 12 V DC
OH-300 2.00-2.25 120 V AC
OH-300-12v 2.00-2.25 12 V DC
OH-400 2.00-2.25 120 V AC
OH-400-12v 2.00-2.25 12 V DC

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Easy-Kleen Pressure Washers
A) I N T RO DU C T I O N
Thank you for selecting a quality EASY-KLEEN product. We are pleased to have
you included among the many satisfied owners of EASY-KLEEN cleaning
machines. Years of engineering have gone into the development of these fine
products and only top quality components and materials are used throughout. Each
machine is carefully tested and inspected before leaving our plant to ensure years
of dependable performance.
To continue to receive satisfactory performance remembering that this machine
represents a substantial investment on your part and if properly cared for and
maintained it will return this investment many times over. As with all mechanical
equipment your machine requires proper operation and maintenance as outlined in
this manual for maximum trouble free life..
PLEASE READ MANUALS CAREFULLY BEFORE USING MACHINE.
EXAMINE MACHINE AND CRATE CAREFULLY FOR SHIPPING DAMAGE
OR MISSING PARTS. REPORT PROMPTLY ANY SHORTAGES OR
DAMAGE CLAIMS TO FREIGHT CARRIER OR DEALER
B) OPERATING CH A R A C TE R I S T I C S
Maximum Working Pressure
The water heater coils are designed to operate safely at working pressures up to
4000 PSI (OH-200 & OH-300) & 5000PSI (OH-400).
Each machine is equipped with a safety pressure relief valve which prevents
operation above safe pressure. If the high pressure pumping system requires a
lower relieving pressure for pump and motor protection then the unloader/relief
valve on the pumping unit should be adjusted to the desired pressure rating.
Temperature Control
The water heater is equipped with a temperature control which shuts down the
burner in the event of excessive outlet temperature caused by insufficient water
flow through the heater coil. Do not set thermostat above 195˚F
High Pressure Switch
A pressure switch is installed in the high pressure water inlet line to prevent burner
operation in the absence of water flow. When the heater is used with shutoff gun
pumping systems this switch controls the burner in conjunction with operation of
the trigger gun.

5
C) INSTALLATION I NS T R U C T I O NS
These water heaters are intended for outdoor use only due to their need for
adequate ventilation for the gasoline powered engines.
D) BASIC CO N T RO L S
The burners on these pressure washer's require a source of electrical power to create
ignition. Optionally each model can generate 12V DC for this purpose or on the
base model 120V electrical connection.
WARNING:
This controller must be provided with suitable overload and
overcurrent protection in accordance with the Canadian Electrical
Code part 1.
Avertissement:
Ce contr leur doit être muni d’une protection contre la
surcharge et la sur intensité, conformément au Code
canadien de l’électircité, Première partie.
UNIT TO BE CONNECTED TO A (GFCI) OR TWIST
LOCK PLUG OR PERMANENT CONNECTION
A high pressure switch prevents burner operation without water flow. The
thermostat's "On-Off" function is provided for manual control.
E) OPERATING I NS T R U C T I O NS
To Operate Burner
Be sure water is flowing through water heater coil before turning on burner switch.
Start the gasoline engine and wait until a steady stream of water is flowing from
the spray gun. Turn thermostat to desired temperature. Burner will ignite and
remain in operation as long as there is sufficient water flow to satisfy the pressure
switch and temperature control. To shut off burner turn temperature switch to
"Off".
Condensation From Coil
When cold water is being pumped through the heater coil and the burner is firing
condensation may form at times on the coil and drip down into the burner
compartment. This can be particularly noticeable on cold humid days giving the
false appearance of a leaking coil.

6
F) BURNER M A I N TE NAN C E
Repair of the burner is to be done by authorized and trained burner professionals
only.
G) TROUBLE SHOOTING GUIDE -BURNER SYSTEM (see also Se r vice
M anua l) See page 26.
BURNER FAILS TO START.
a. Check for loose or broken electrical connections
FIX Tighten or replace electrical connections
b. Pressure switch not operational
FIX Replace pressure switch.
c. Thermostat inoperative.
FIX Replace thermostat
d. Burner still won't function
FIX Refer to authorized burner repair facility.
H) GENERAL
MAINTENANCE AND C A R E
If the water heater is likely to be exposed to freezing weather then it should be
winterized with anti-freeze. Circulation of an anti-freeze solution through the coil
by means of the pumping module is the most fail-safe method and should be used.
Alternate methods may not completely protect the components. Damage from
freezing is not a warrantable item.
Water Condition Use a softener on your water system if local water is known to be
high in mineral content. The advantages of soft water are very beneficial: prevents
scale buildup in heater coil cleans better with considerably less detergent prevents
streaking on painted surfaces and glass when rinsing.
Descaling Heater Coil If heater coils develop excessive scale buildup it should be
replaced as excessive scale in heater coil will reduce efficiency of the unit and
affect recovery capacity. Descaling via use of acid may be hazardous and is thus
not recommended.

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EASY-KLEEN PRESSURE S Y ST E MS
OPERATIONS M ANUA L
OIL FIRED HOT WATER PRESSURE W AS H E R
I N T RO DU C T I O N
This manual has been prepared under the direction of our assembly and
service technicians. Their experience in designing manufacturing
installing and servicing our equipment from our company’s inception is
condensed in this manual. They know what information the end user
needs in order to get the optimum performance from their pressure
washer. Please read carefully.
This manual contains information that will be specific for your pressure
washer as well as similar models.
Carefully r eview any additional manuals that have been i n cl ud e d
with your system and follow ALL ADDITIONAL O PE R A T I N G
INSTRUCTIONS AND SAFETY NOTICES. They are specific fo r
the quality components that have been used to manufacture yo u r
machine and are an integral part of the operating and m a i n t e n a n ce
p r oce du r es.
The management & staff at Easy-Kleen Pressure Systems are proud of
the equipment that we design and manufacture and we thank you for
making us your # 1 choice in pressure washers. If you have any
questions please do not hesitate to call us 1-800-315-5533.

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USING YOUR M A NU A L
This manual contains operational information that is specific for
Oil
Fired Hot Water Pressure W a s h e r s.
IMPORTANT: ALL CAUTIONS AND SAFETY WARNINGS
MUST BE FOLLOWED TO AVOID INJURY.
Note particularly…
DO NOT USE GASOLINE CRANKCASE DRAININGS OR OIL C O N T A I N I N G
GASOLINE OR SOLVENTS *WARNING: RISK OF INJECTION OR S E V ERE
INJURY. KEEP CLEAR OF NOZZLE. DO NOT DIRECT DISCHARGE STREAM A T
PERSONS. THIS EQUIPMENT IS TO BE USED ONLY BY TRAINED O PER A T O R S
*THE MACHINE MUST BE
ELECTRICALLY GROUNDED *THIS MACHINE M US T
BE ATTENDED DURING OPERATI0N * DO NOT ADD FUEL WHEN ENGINE I S
RUNNING OR HO T
*NE PAS UTlLlSER D’ESSENCE DE PRODUITS DE VIDANGE NI D’ H U I LE
CONTENANT DE L’ESSENCE OU DES SOLVANTS;*AVERTISSEMENT: R I S Q U E
D’INJECTION ET DE BLESSURES GRAVES. SE TENIR A L’ECART DU JET. NE P AS
DlRlGER LE JET DE SORTIEVERS D’AUTRES PERSONNES. C O N F I ER
L’UTILISATlON DE CE MATERIEL A UN OPERATEUR QUAL1FIE. *NE PAS F A l RE
FONCTIONNER CETTE MACHINE SANS SURVEILLANCE;* LA MACHINE D O l T
ETRE MISE A LA TERRE * NE PAS AJOUTER DE COMBUSTIBLE PENDANT S O l T
EN MARCHE OU SOlT QUE LE MOTEUR C H AUD.

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SAFETY F I R S T
The safe operation of our pressure washing systems is the FIRST priority of
Easy-Kleen Systems. This will only be achieved by following the operation
and maintenance instructions as explained in this manual and all other
enclosed manuals.
If you need further explanation of any of the information in this manual
suspend any activity involving the equipment and call our toll free number
for assistance 1-800-315-5533.
HIGH PRESSURE SPRAY CAN CAUSE SERIOUS I N J U R I E S.
HANDLE THE SPRAY ASSEMBLY WITH
C A RE .
NEVER POINT PRESSURIZED SPRAY AT ANY PERSON O R
ANIMAL !
THIS MACHINE IS NOT TO BE CONNECTED TO A TYPE B GAS
VENT
NE PAS RACCORDER CET APPAREIL TUYAU D’EVACUATION DE
GAZ DU TYPE B
WARNING: RISK OF INJECTION OR SEVERE INJURY. KEEP CLEAR
OF NOZZLE. DO NOT DIRECT DISCHARGE STREAM AT PERSONS.
THIS EQUIPMENT IS TO BE USED ONLY BY TRAINED OPERATORS
AVERTISSEMENT: RISQUE D’INJECTION ET DE BLESSURES
GRAVES. SE TENIR A L’ECART DU JET. NE PAS DlRlGER LE JET
DE SORTIE VERS D’AUTRES PERSONNES. CONFIER
L’UTILISATlON DE CE MATERIEL A UN OPERATEUR QUALIFIE
THE MINIMUM CLEARANCE TO ANY COMBUSTIBLE MATERIALS
IS 12” (TWELVE INCHES).

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OPERATING I NS T R U C T I O NS
1. Perform pre-start maintenance inspection on all applicable sys t e m s
prior to operating the machine. This is essential for the safe effec t ive
and efficient
operation. You will get optimum performance from yo u r
system ONLY if these instructions and inspections are followed. A n y
indication that the
pressure washing system was not operated and
maintained a cco r d i n g to these instructions may cancel t h e
manufacturers’ w a rr an t y.
Location – Gasoline p owe r e d machines must be outdoors in a well
ventilated
a r e a .
Controls – All co n t r ols turned to the off p osi t io n .
Pump oil level – Level the pressure washer. Be sure oil level is
correct on dip stick. If
t h e level is low add CORRECT oil to the
proper level. Refer to t h e G loss a r y or the suggested spare list for
proper
oil to use. DO N O T OVER F I LL .
Gas Engine - Gasoline levels – The engine is a 4 cycle and u ses
regular octane unleaded fuel. DO NOT USE MIXED F U EL .
Refer to the engine operation manual included with your
pressure-washing un i t .
Gas Engine - Oil levels – The engine is a 4 cycle and uses 10W30
Detergent oil. Refer to G loss a r y or engine m anua l.
Oil Fired Burner- Oil Tank Levels – #2 Fuel is r eco mm e nd e d f u el
fo
r Oil Fired Hot Water Pressure Washers. It burns cleaner and
the burner requires less maintenance. Diesel fuel may be used a s
an
alternative. Do not ove r fill burner t ank .

11
E lec t r ic a lly Operated Burners – Some models generate 12V f r o m
t h e gasoline engine and provide the n ecess a r y p owe r for t h e
burner. Others utilize a 120v connection which must be g r o und e d .
IF YOU
REQUIRE UPGRADES OR MODIFICATIONS T O
YOUR EXISTING ELECTRICAL SYSTEM IN ORDER T O
OPERATE
YOUR PRESSURE WASHER THEY MUST B E
PERFORMED BY A LICENSED ELECTRICIAN AND B E
COMPLETED IN ACCORDANCE TO ALL A PPL I C AB LE
CODES IN YOUR AREA OF O PE R A T I O N.
Visually inspect all elec t r ic a l components to assure they are i n
good condition showing no signs of ex p os u r e breakage o r
s p lici n g.
Visually inspect all hoses nozzles and guns to assure they are i n
goo d condition. If replacements are n ecess a r y they must be r a t e d
to withstand the machines operating pressure and t e m p e r a t u r es.
2. Attach the high-pressure hose to the outlet coupling on the boiler o r
pump. Ensure that the quick disconnect connections are tightly loc k e d
t oge t h e r .
3. Attach the water so u r ce to the water inlet located on the pump. Turn o n
the water so u r ce. The water so u r ce may be attached with a good qua li t y
standard garden type hose 1/2” is r eco mm e nd e d . Connect the m a le
fitting into the female pump inlet swivel fitting making
sure that t h e
inlet sc
r ee n is intact and fitted correctly. WATER MUST BE I N
SUFFICIENT SUPPLY AND PRESSURE MUST BE BETWEEN 20 –
60 PSI TO ENSURE
PROPER AND SAFE OPERATION. DO N O T
ATTACH A HOSE THAT IS SMALLER IN SIZE THAN THE
I N LET
OF THE P U M P .
4. Engage Pump P owe r So u r ce and B u r n e r
• Gasoline engine - refer to the instructions in the Engine M anua l
MAKE SURE THAT THE ENGINE EXHAUST IS NOT FACING
ANY FLAMMABLE MATERIALS. Adjust the burner thermostat
control to ON at the desired temperature.
• Electric Motor – Manual – Turn burner switch to PUMP adjust the
burner thermostat to desired temperature turn switch to BURNER.

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5. Burner operation – The machine must be operating with water so u r ce
connected and flowing
prior to turning on the burner. IF Y O U
EXPERIENCE IGNITION FAILURE DO NOT ATTEMPT T O
RESTART BURNER! EXCESS FUEL AND VAPORS MAY H AV E
ACCUMULATED AND THE CHAMBER MAY BE HOT. THE UN I T
MUST COOL DOWN BEFORE RESTART CAN BE A TTE M PTE D.
If the
burner does not restart call the Easy-Kleen se r vice
department or your local oil burner se r vice t ec hn ici an .
6. Pressure adjustment - The pressure regulator (unloader) is located o n the
pump. It co
n t r ols the pressure being generated by the p r ess u r e washer.
This regulator may be adjusted to the desired pressure b y turning the
adjustment knob or nut depending on the unit pu r c ha se d . Turning the
adjustment knob clockwise will i n c r e a se the p r ess u r e. NEVER OPERATE
SYSTEM AT A PSI HIGHER THAN T H E MAXIMUM RATING. This
machine has been
adjusted to operate at a specifically rated PSI and
Volume as
per the machine s p ecific a t io n s. Pressure may be reduced for
lighter
use by turning the P r ess u r e Regulator/Unloader counter
cloc
k wise.
7. Cleaning - Pull trigger on the pressure wand assembly to start cle an i n g.
To stop the
pressurized water r ele a se the trigger. DO NOT LE AV E
UNIT RUNNING WHEN NOT IN US E .
8. To stop Burner operation – Turn the control switch to off and r un pump
for two minutes to cool the coil. Release trigger on the p r ess u r e wand
assembly.
Turn off main p owe r to engine refer to m anua l. Release the
trigger for the second time in order to r elieve the pu m p system of
p r ess u r e.
9. Prior to storage – inspect the pressure washer for any damage o r required
maintenance.
In cold weather always store the unit in a h e a t e d a r e a .
10. W a r n i n g – If unit is left running while not in use pump damage m a y
occ
u r . Do not leave unit running while not in u se!
11.Battery Specifications for electric start systems only – Rating: 165CCA
190 CA or better dimensions: 8” x 5” x 6”.

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CHEMICAL A PP L I C A T I O N
DOWNSTREAM CHEMICAL INJECTION – S T ANDA R D
NOTE: Do not remove back flow preventer as chemical may flow back into the
potable water sou
r ce.
1. Chemical preparation – Select the d e t e r ge n t /c h e m ic a l that best s u i t s your
cleaning task. Prepare the dilution a cco r d i n g to the m anu f a c t u r e r s
instructions. The volume of chemical being used may be adjusted at t h e
valve located on the chemical i
n j ec t o r .
2. Insert the intake hose located on the chemical injector at the pump i n t o
the chemical being
u se d .
3. Turn the adjustment knob on the wand or lance to the open p osi t io n
OR when single lance is used black nozzle will need to be used on
wand.
4. To apply chemical engage the trigger on the pressure wand a sse m b ly.
Turn the chemical injector’s nipple to adjust flow.
5. Chemical can now be applied through the pressure wand assembly. I t will
take 5 – 15 seconds
for the chemical to travel to the spray n ozzle. Volume
of chemical being used
or water being supplied may be ad j u s t e d at the
Chemical
I n j ec t o r .
6. For best results apply chemical from bottom to top allow the c h e m ic a l
proper penetration time prior to rinsing. Do not allow the chemical t o
dry. Rinse from the top to the b o tt o m .
7. Optional high pressure chemical injection systems available. P le a se
contact
E a sy- K lee n .

14
WINTER PUMP/COIL P ROTECT I O N
The following
procedure MUST be used when the pressure washing unit is
stored at temperatures below 0°C/32°F between u ses.
1. All water must be drained or blown (via co m p r esse d air) from sys t e m .
Connect a
short piece of male fitted ½” garden type hose on to t h e
female inlet on the
pu m p .
2. Place the open end of the hose into a wide mouthed container of f u ll
strength winter rated vehicle windshield washing fluid or Anti-Freeze
RATED
F OR MINIMUM -40° C .
3. Connect the pressure wand a sse m b ly.
4. Start the engine and engage the trigger on the pressure gun. O p e r a t e
the system until the fluid
runs the same colo r as the windshield w a s h i n g
fluid.
Your machine is now prepared for s t o r a ge.
5.
Blow out disconnect fluid supply & pump out excess or cap end

15
GLOSSARY OF TE R M S
PSI – Pounds per square inch. Pressure washers are designed and rated to operate
at a specific PSI. Operating at pressures exceeding the maximum rating could
result in damage to the unit and/or SEVERE PERSONAL INJURY.
GPM – Gallons per minute. The orifice on the pressure wand assembly has been
selected to deliver up to the maximum GPM for your machine.
PRESSURE WAND ASSEMBLY – This refers to the gun wand and nozzle.
PUMP – The pump moves the water through the system and delivers it to the
pressure wand assembly.
OIL PUMP –The oil used within the pump to lubricate its operation. Important to
use only SAE 30 Wt Non Detergent
OIL GASOLINE ENGINE – Machines which are powered by gasoline engines
need appropriate lubricant. Use 10W30 detergent oil.
UNLOADER VALVE – Is a valve located at the head of the pump for unloading
water back into the bypass when the trigger gun is shut off. It releases water when
the trigger on the gun is pressed. The unloader valve is preset at the factory and
should not be adjusted.
BURNER – The burner heats the water in hot water pressure washers. It is located
in the coil and may be powered by propane gas or oil.
DEMA – High-pressure chemical injector.
BACK FLOW PREVENTER – Device to prevent flow backwards into potable
water supply.

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Easy-Kleen Pressure Washers Service Manual This manual is intended for technical personnel to assist in the diagnosis and repair of issues with pressure washers. This manual is not intended for use by non-technical personnel. It is advised to always refer to competent technical personnel when repairs are advised to to avoid equipment damage or potential personnel injury. If you have any technical questions please do not hesitate to call us at 1-800-315-5533.

17
POWER SYSTEM DIAGNOSTICS - Gas Motor Not Starting
PROBLEM
POSSIBLE CAUSE
SOLUT
I
ON
Gas motor not starting
Fuel
Check to see if proper fuel levels are maintained
No ignition
Check ignition by removing spark plug from cylinder. If electric start, try starting using the recoil starter.
Electric Starter/Battery Recharge or replace battery. Fuse blown in key switch 18 amp engine open key switch replace 30 amp fuse
Spark Plug - strong gas smell
Flooded
Wait 5 minutes before attempting to restart.
No ignition
Check ignition by removing spark plug from cylinder. If electric start, try starting using the recoil starter.
Bad plug
Check spark plug and replace if necessary. Carbon deposits can indicate a fouled plug or too much fuel.
Plug does not fire
Poor connection
Inspect the ignition connection.
Bad magneto
Check the source of spark plug for engine ignition.
Bad ignition system
Poor connection
Check the source of spark for the engine ignition.
Spark Plug - no gas smell
No fuel to cylinder
Check fuel delivery from carburetor to cylinder. Check carburetor float bowl for fuel.
Fuel line restricted
Inspect fuel line to carburetor for restrictions or clogging. Flexible line may be kinked.
Stuck carburetor float
Unstick float
Clogged carburetor needle valve
Unclog needle valve.
Bad fuel pump
Replace fuel pump.

18
FLUID SYSTEM DIAGNOSTICS - Flow and Pressure
PROBLEM
POSSIBLE CAUSE
SOLUT
I
ON
No Flow
No power
Make sure pump is operating. Check drive belts and couplings, make necessary adjustments.
Trigger gun valve
Check trigger gun, repair or replace.
No water source
Ensure water supply is not restricted and hoses are in good repair and not kinked.
Clogged spray no le
Check spray no le, repair or replace.
Clogged inlet filter
Check inlet filter, repair or replace.
Float Valve stuck (optional)
Float valves can become stuck in the "UP" position. Manually dislodge and inspect for problems.
Faulty unloader valve
Remove and check for proper action, repair or replace.
Low pressure, adequate flow
Incorrect or no spray no le
No le should be properly si ed for the system. Low pressure indicates that the no le in use is too large.
Worn spray no le
Replace no le when it shows signs of internal erosion.
Debris in valves
Clean valves and check o-rings for pits and cracks.
Lance on low pressure
Adjust pressure so the water flows through properly.
Unloader is not adjusted correctly
Adjust unloader to proper level.
Pressure gauge inaccurate
Use a new pressure gauge on a quick connect at outlet to check system pressure and replace if gauge is faulty.
Pump packings bad
If low pressure persists, pump packings may need replaced.
Low pressure, low flow
Volume Improperly adjusted
If unit has volume adjustment, it may need readjustment
Discharge leaks
Look for leaks on the discharge side of system.
Downstream chemical injector (Dema)
Remove the injector and retest system. If the flow is restored, replace the injector.
Loose drive belts
If belts do not have proper deflection, replace them.
Pump not running at rated speed
Check engine throttle and see that the motor is rated for the same speed as the pump.
Stripped pump drive coupling
Inspect coupling and repair or replace.
Defective easy start valve (optional)
Check the start or throttle-back valve for proper operation.
Malfunctioning motor or gear
Ensure that the motor or engine is working properly
Unloader stuck in bypass
Piston assembly may be stuck or fouled
Low pressure, low flow - Bogs
Outlet restriction
Build up can restrict flow. If water is not flowing freely, flush with garden hose to isolate the clog or restriction.
Clogged no le
Distorted spray pattern can indicate a clogged no le.
No le too small
Ensure no le is proper si e for the system.
Hose restriction
Correct any kinks or restrictions. Replace crushed hoses.
Debris in the system
Debris can lodge in the discharge side of the system (valves, fittings, injectors, filters) Flushing with water may correct it.

19
PROBLEM
POSSIBLE CAUSE
SOLUT
I
ON
Excessive pressure
Small spray no le
No le must be properly si ed for the rated flow and pressure. Reset unloader or pressure relief if no le si e is changed.
Faulty pressure gauge
Check the pressure gauge using a properly calibrated pressure gauge on quick connects at the equipment outlet.
Improperly adjusted unloader
Adjust to the proper pressure using pressure gauge.
Faulty unloader
Check the unloader action. If it is not working properly, it may need repaired or replaced.
Pump chatters, caviataion, vibration
Air in system
Inspect places where air can enter the system. i.e. fittings, hose, connections etc.
Chemical line not submerged
If the chemical valve is on, ensure that the chemical line is fully submerged in the chemical
Inlet line restricted
All inlet connections should be snug and not kinked to reduce the chances of pump starvation.
Inadequate water supply
Water supply to the system must meet or exceed the rated flow (GPM) on the serial number plate. Faucet must be completely opened or water above the tank outlet in a gravity fed system.
Float valve stuck (optional)
If float valve is stuck in the up position, water can not enter the float tank. Unstick valve if possible of replace if necessary.
Turbulence in float tank (optional)
Excessive turbulence allows the pump to draw air into the system. Correct excessive turbulence.
Inlet or inlet strainer clogged
Regularly clean the inlet and inlet strainer to keep debris from entering the float tank
Water supply to hot
Inlet temperature should not exceed 140F - 160F range.
Inlet line vibrates
Air in system
Inspect places where air can enter the system, i.e.; fittings, hose, connections etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the inlet check valve may be clogged. Remove debris. Check o-rings under valves.
Outlet line vibrates
Air in system
Inspect places where air can enter the system, i.e.; fittings, hose, connections etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the inlet check valve may be clogged. Remove debris.
Pump packing bad
If they show signs of ware or damage, replace them.
Inlet and outlet lines vibrate
Inlet and outlet check valves fouled
Look for the source of debris in the inlet and discharge check valves and remove.

20
FLUID SYSTEM DIAGNOSTICS - Unloader
PROBLEM
POSSIBLE CAUSE
SOLUT
I
ON
Very low or no flow
Unloader stuck in bypass
Isolate the flow problem. If it occurs before the unloader discharge point, check the piston assembly to see if it is fouled or stuck in bypass mode.
Unloader will not unload
Debris in unloader
Take bottom nut off unloader, identify ball, spring and seat. Clean out any debris and
Sever leak on the outlet of unit
Check for leaks and repair.
Unloader (flow) cycles with system under pressure
Improper flow
Any variation in flow form what the orifice is si ed can cause cycling. System must produce the
rated flow constantly.
No le to small
A no le that is too small can cause the flow to be reduced.
No le clogged
A distorted spray pattern indicates a clogged no le.
Improper unloader orifice
The systems rated output should indicate the proper si ed orifice for your system.
Unloader orifice clogged
Check the orifice for clogs and clear out any debris.
Injector orifice clogged
If the system has a Venturi injector downstream of the unloader, check the orifice for clogs.
Other downstream restriction
Scale buildup can restrict flow. Check; controls, valves, switches, trigger gun, and lance. Descale as necessary and begin preventive maintenance program for scale prevention.
Pump not delivering the rated pressure
See low pressure or low flow diagnostics.
High water supply pressure
Check inlet water supply for excessive pressure.
Unloader (flow) cycles with system in bypass
No restrictions on the unloader
Check unloader bypass port to see if a flow restrictor is properly installed. Install one if none is present.
Downstream leakage (excessive)
Causes the unloader to since a continuing flow and divert it to the closed gun. Repair or replace.
Accumulator downstream (option)
Remove the accumulator from the system.
Unloader (pressure) produces smooth flow & low volume
Unloader adjusted too low
Adjust the unloader using the pressure gauge for the correct pressure.
Spray no le clogged
A distorted spray pattern indicates a clogged no le.
Spray no le too small
A small no le causes a reduced flow and cycling may result.
Injector orifice blocked
If the system has a Venturi injector downstream of the unloader, check the orifice for clogs.
System not delivering rated flow
See flow diagnostics.
Unloader (flow) produces smooth flow & low volume
Unloader adjusted too low
Adjust unloader and regulator until proper pressure is achieved.
Unloader valve stuck in bypass
If unloader is sticking, repair or replace as necessary.
Restriction in system
Downstream restrictions can cause a reduction in flow. Check; controls, valves, switches, trigger gun, and lance. Descale as necessary and begin preventive maintenance program for scale prevention.