Shark HNG-4020 User manual

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97-610
OPERATOR’S MANUAL
 HNG-4020 HNG-3530 HNG-5030
HNG

3
CONTENTS
SHARK HNG • 97-610 • REV. 3/06
Introduction & Important Safety Information 5-6
Component Identification 7
Installation 8
Installation Guide 9-12
Check List Before Starting 12
Assembly Instructions 13
Operating Instructions 14
Detergents & General Cleaning Techniques 15
Shut-Down & Cleanup 16
Storage 16
Basic Facts 17
Troubleshooting 18-19
Maintenance & Service 20-23
Heating Coils 20
Propane Gas 21
Burner Features 21-22
Burner Troubleshooting 22-23
Preventative Maintenance Schedule & Oil Change Record 24
Hose & Spray Gun Assembly 25
Exploded View, Left Side 26
Exploded View, Right Side 27
Exploded View, Parts List 28-29
Burner Assembly, Exploded View 30
Burner Assembly, Exploded View, Parts List 31
Control Panel, Exploded View 32
Control Panel, Parts List 33
Float Tank Assembly 34
Electrical Box, Standard, Parts List 35
Electrical Box, Time Delay Exploded View 36
Electrical Box, Time Delay, Parts List 37

CONTENTS
4
Model Number ______________________________
Serial Number ______________________________
Date of Purchase ____________________________
The model and serial numbers will be found on a decal attached
to the pressure washer.You should record both serial number and
date of purchase and keep in a safe place for future reference.
SHARK HNG • 97-610 • REV. 3/06
Electrical Box, Auto Start Exploded View 38
Electrical Box, Auto Start, Parts List 39
SM Series Pump Exploded View and Parts List 40-41
Specifications 42-43
AR-AL Unloader Exploded View and Parts List 44
Warranty

SHARK HNG • 97-610 • REV. 3/06
5
PRESSURE WASHER OPERATOR’S MANUAL
Thank you for purchasing our pressure washer.
This manual covers the operation and maintenance
of the 402007A, 353007A, 503007B and 503007C
model washers. All information in this manual is based
on the latest product information available at time of
printing.
We reserve the right to make changes at any time
without incurring any obligation.
Owner/User Responsibility:
The owner and/or user must have an understanding of
the manufacturer’s operating instructions and warnings
before using this pressure washer.Warning information
should be emphasized and understood. If the opera-
tor is not fluent in English, the manufacturer’s instruc-
tions and warnings shall be read to and discussed
with the operator in the operator’s native language by
the purchaser/owner, making sure that the operator
comprehends its contents.
Owner and/or user must study and maintain for future
reference the manufacturers’ instructions
This manual should be considered a permanent
part of the machine and should remain with it
if machine is resold.
When ordering parts, please specify model and
serial number.
IMPORTANT SAFETY
INFORMATION
WARNING: When using this machine basic pre-
cautions should always be followed, including
the following:
CAUTION:To reduce the risk of
injury, read operating instruc-
tions carefully before using.
1. Read the owner's manual
thoroughly. Failure to follow
instructions could cause
malfunction of the machine
and result in death, serious
bodily injury and/or property
damage.
2. All installations must comply with local codes.Con-
tact your electrician, plumber, utility company or
the selling distributor for specific details.
To comply with the National Electrical code (NFPA
70) and provide additional protection from risk of
electric shock, this pressure washer is equipped
with a UL approved ground fault circuit interrupter
(GFCI) power cord for machines rated 250V 30
amp or less, single phase.
3. Know how to stop the machine and bleed pres-
sures quickly. Be thoroughly familiar with the
controls.
4. Stay alert. Watch what you are doing.
WARNING: Flammable liquids
can create fumes which can
ignite causing property dam-
age or severe injury.
5. Risk of explosion - Do not
spray flammable liquids or
operate in an explosive lo-
cation. Operate only where
open flame or torch is per-
mitted.
WARNING: Keep water spray
away from electrical wiring or
fatal electric shock may result.
Read warning tag on electrical
cord.
6. To protect the operator from
electrical shock, the machine
must be electrically ground-
ed. It is the responsibility
of the owner to connect this
machine to a UL grounded receptacle of proper
voltage and amperage ratings. Do not spray water
on or near electrical components. Do not touch
machine with wet hands or while standing in water.
Always disconnect power before servicing.
WARNING: Spray gun kicks back. Hold with both
hands.
7. Grip cleaning wand securely with both hands be-
fore starting the cleaner. Failure to do this could
result in injury from a whipping wand.
WARNING: Equipment can pro-
duce a high pressure stream of
fluid that can pierce skin and its
underlying tissues, leading to
serious injury and possible
amputation.
8. High pressure developed by
these machines can cause
personal injury or equipment
damage. Use caution when operating. Do not
direct discharge stream at anyone or at any part
of the body, or severe injury or death will result.
This machine is to be used only by qualified op-
erators.
READ OPERATOR’S
MANUAL
THOROUGHLY
PRIOR TO USE.
CAUTION
WARNING
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
WARNING
RISK OF EXPLOSION:
DO NOT SPRAY FLAM-
MABLE
LIQUIDS.
WARNING
KEEP WATER SPRAY
AWAY FROM
ELECTRICAL WIRING.
INTRODUCTION & SAFETY INFORMATION

SHARK HNG • 97-610 • REV. 3/06
OPERATOR’S MANUAL PRESSURE WASHER
6
CAUTION: Hot discharge fluid.
Do not touch or direct dis-
charge stream at persons.
9. Never make adjustments on
machine while in operation.
WARNING: High pressure can
cause paint chips or other par-
ticles to become airborne and
fly at high speeds.
10. Eye safety devices and foot
protection must be worn
when using this equipment.
WARNING: Risk of asphyxi-
ation. Use this product only in
a well ventilated area.
11. When the machine is work-
ing, do not cover or place in
a closed space where venti-
lation is insufficient.
12. Machines with spray guns
should not be operated with
the trigger in the off position
for extensive periods of time as this may cause
damage to the pump.
13. Protect from freezing.
14. Be certain all quick coupler fittings are secured
before using pressure washer.
15. Do not allow acids, caustic, or abrasive fluids to
pass through the pump.
16. Inlet water must be cold and clean fresh water.
17. To reduce the risk of injury, close supervision is
necessary when a machine is used near children.
Do not allow children to operate the pressure
washer. This machine must be attended dur-
ing operation.
18. The best insurance against an accident is pre-
caution and knowledge of the machine.
19. Do not operate this product when fatigued or under
the influence of alcohol or drugs. Keep operating
area clear of all persons.
20. Do not replace LP tank while machine is running.
Serious injury could result.
WARNING: Use only vapor pro-
pane fuel.
21. This equipment is designed
to run on vapor fuel. Do not
use liquid fuel. Have a qual-
ified serviceman install and
service your equipment.
22. Never expose a spark or
flame where unburned gas
may be present.
23. Never attempt to light pilot unless pilot manual
valve has been shut off for 5 minutes.
24. A conversion kit, as supplied by the manufacturer,
shall be used to convert natural gas to propane.
25. L.P. gases are heavier than air and will spill out on
the floor.Therefore always provide adequate space
and ventilation around these machines. Install
machine 18" above the floor.
26. Manufacturer will not be liable for any changes
made to our standard machines, or any compo-
nents not purchased from the manufacturer.
27. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
28. Follow maintenance instructions specified in the
manual.
29. When making repairs discon-
nect from electrical source
and shut off gas valve.
30. Turn burner off, open spray
gun and cool to 100° F before
turning machine off.
31. Extinguish any open flame
and test all joints with a
soap solution. If odor per-
sists, call your gas supplier
immediately.
32. Not suitable for connection to Type B gas vent if
the stack temperature exceeds 243° C (470° F).
33. A draft diverter shall be installed if this machine is
going to be permanently installed and vented to
the outside of the building.
WARNING
RISK OF
ASPHYXIATION.
USE ONLY IN A WELL
VENTILATED AREA.
RISK OF EXPLOSION:
IF GAS SMELL
PRESENT TURN
OFF SUPPLY
WARNING
WARNING
EXTREMELY HOT:
USE CAUTION WHEN
OPENING LID.
WARNING
PROTECTIVE EYE-
WEAR AND CLOTHING
MUST
BE WORN.
WARNING
RISK OF FIRE.
DO NOT USE WITH
FLAMMABLE LIQUIDS.
INTRODUCTION & SAFETY INFORMATION

SHARK HNG • 97-610 • REV. 3/06
7
PRESSURE WASHER OPERATOR’S MANUAL
COMPONENT IDENTIFICATION
Pump — Develops high pressure.
Pump/Burner Switch— Controls operation on ma-
chine.
Spray Gun — Controls the application of water and
detergent onto cleaning surface with trigger device.
Includes safety latch.
Detergent Valve — Allows you to siphon and mix
detergents.
Wand — Must be connected to the spray gun.
High Pressure Hose — Connect one end to water
pump discharge nipple and the other end to spray
gun.
Wand Quick Coupler — Pulling the brass collar back
allows the insertion of pressure nozzle.
Note:If trigger on spray gun is released for more
than 2 minutes, water will leak from valve. Warm
water will discharge from pump protector onto
floor. This system prevents internal pump dam-
age.
Burner
Switch
Wand Quick
Coupler
Spray
Gun
Trigger
Spray
Wand
Pump
Switch
Pressure
Nozzles
Detergent
Valve
High Pressure
Hose
Detergent Bucket
(optional)
Main Gas
Supply Inlet
1/2 psig
Water Supply
Hose
(not included)

SHARK HNG • 97-610 • REV. 3/06
OPERATOR’S MANUAL PRESSURE WASHER
8
INSTALLATION
9.57" I.D.
49-0"
38-3/8"
High Pressure Out
11-3/4"
27-1/2"
44-1/4"
Gas In
1-1/2" NPT-M
3.0"
Fresh Water
In 1.0" GHF
1-1/4"

SHARK HNG • 97-610 • REV. 3/06
9
PRESSURE WASHER OPERATOR’S MANUAL
INSTALLATION
Place machine in a convenient location providing am-
ple support, drainage and room for maintenance (see
page 8).
Location:
The location should protect the machine from dam-
aging environmental conditions, such as wind, rain
and freezing.
1. The machine should be run on a level surface
where it is not readily influenced by outside sourc-
es such as strong winds, freezing temperatures,
rain, etc.The machine should be located consider-
ing accessibility for the replacing of components
and the refilling of detergents, adjustments and
maintenance.Normal precautions should be taken
by the operator of the machine to prevent excess
moisture from reaching the power unit or electrical
controls.
2. It is recommended that a partition be made be-
tween the wash area and the machine to prevent
direct spray from the spray gun from coming
in contact with the machine. Excess moisture
reaching the power unit or electrical controls will
reduce the machine’s life and may cause electrical
shorts.
3. During installation of the machine, beware of
poorly ventilated locations or areas where exhaust
fans may cause an insufficient supply of oxygen.
Sufficient combustion can only be obtained when
there is a sufficient supply of oxygen available for
the amount of fuel being burned. If it is necessary
to install a machine in a poorly ventilated area, out-
side fresh air may have to be piped to the burner
and a fan installed to bring the air into the area.
4. Do not locate near any combustible material. Keep
all flammable material at least 20 feet away.
Allow enough space for servicing the machine.
Local code will require certain distances from floor
and walls. (Two feet away should be adequate).
WARNING: Avoid small areas or near exhaust
fans.
Gas Codes:
Confer with local gas company and with proper mu-
nicipal officials regarding any specific code or regu-
lations governing the installation.The installation must
conform to local codes.
Electrical:
The machine, when installed, must be electrically
grounded in accordance to local codes. Check for
proper power supply using a volt meter; check the
serial plate for the correct requirements.
Gas Piping:
Figure 1: DRIP LEG
Sediment trap (drip leg) must be
installed in the supply line.
Install a union in the gas line adjacent to and upstream
from the control manifold and downstream from the
manual main shut-off valve. A 1/8" NPT plugged
tapping accessible for test gauge connection shall
be installed immediately upstream of the gas supply
connection for the purpose of determining the gas
supply pressure to the burner, and to prevent dam-
age to gas valve.
If a manual gas shut off valve is not in the gas supply
line within six feet of the machine and in an accessible
location, one shall be installed.
Figure 2: UNION LOCATION
Manual
Shut-Off Valve
1/8" NPT Plugged
Pressure Gauge
Port Location
Union
Control Manifold
Tee
Flow
3" (7.62 mm)
Minimum
Floor Level
Pipe
Cap
To
Gas Valve
1/4" Test Port
(6" - 14 W.C.
or 1/2" PSIG)
Gas
Valve
Gas
Valve
Drop
3" (7.62 mm)
Minimum
3"
(7.62 mm)
Minimum

SHARK HNG • 97-610 • REV. 3/06
OPERATOR’S MANUAL PRESSURE WASHER
10
INSTALLATION
The following pipe and stack sizes are just recom-
mendations. Always consult a local plumber and vent-
ing contractor for local codes and regulations during
installation.
The following tables are maximum capacity of final
stage pipe in thousands of Btu/hr of commercial
propane
From first stage regulator (at tank) to second stage
regulator
The chart below is based on incoming gas pressure
of 10 PSI and a pressure drop of 1 PSI. Numbers are
for straight schedule 40 pipe; fittings further reduce
capacity.
From second stage regulator to machine.
The following chart is based on incoming gas pressure
of 11 w.c.i. and a pressure drop of .5 w.c.i. Numbers
are for straight schedule 40 pipe;fittings further reduce
capacity.
The chart below is based on gas pressure in the range
0-.5 PSI, specific gravity of .6, and pressure loss of
.5 w.c.i. Numbers are for straight schedule 40 pipe;
fittings further reduce capacity.
PROPANE
Length of Pipe
(ft.)
Iron Pipe Size
1/2" 3/4"
10 3339 6982
20 2295 4799
30 1843 3854
40 1577 3298
50 1398 2923
60 1267 2649
70 1165 2437
80 1084 2267
90 1017 2127
100 961 2009
150 772 1613
200 660 1381
250 585 1224
300 530 1109
350 488 1020
400 454 949
450 426 890
500 402 841
PROPANE
Length of
pipe (ft.)
Iron Pipe Size
1/2" 3/4" 1"
10 291 608 1146
20 200 418 788
30 161 336 632
40 137 287 541
50 122 255 480
60 110 231 435
70 102 212 400
80 94 198 372
90 87 185 349
100 84 175 330
NATURAL GAS
Length
of Pipe
(ft.)
Iron Pipe Size
3/4" 1" 1-1/4-
"
1-1/2-
"2"
10 360 680 1400 2100 3950
20 250 465 950 1460 2750
30 200 375 770 1180 2200
40 170 320 660 990 1900
50 151 285 580 900 1680
60 138 260 530 810 1520
70 125 240 490 750 1400
80 118 220 460 690 1300
90 110 205 430 650 1220
100 103 195 400 620 1150
150 84 160 325 500 950
200 72 135 280 430 800

SHARK HNG • 97-610 • REV. 3/06
11
PRESSURE WASHER OPERATOR’S MANUAL
INSTALLATION
Venting:
This machine is to be used indoors and requires
ventilation.
When venting the machine, if the machine is to be in
an enclosed area with a vent pipe, be sure it is the
same size as the stack on the machine. Poor draft will
cause the machine to soot and not operate efficiently.
When placing the machine for installation, position the
vent pipe to be as straight as possible and to protrude
through the roof of the building at a proper location and
at sufficient height to eliminate down-draft.Venting of a
gas fired machine shall be installed with a down-draft
diverter located about 3 ft. above machine.
Input - BTU Per Hour Draft Hood & Flue Pipe
Size
250,000 - 320,000 8 inch
320,000 - 410,000 9 inch
410,000 - 600,000 10 inch
600,000 - 750,000 12 inch
NOTE: If the vent pipe exceeds 10 ft. in length, or
contains more than two elbows, use next size larger
pipe and draft diverter or the burner will not ignite. No
movable vent pipe damper should be used on any
installation.
Draft Diverter:
Install the draft diverter above the heating coil. The
diverter enhances the draft through the burner by sev-
ering the chimney effect created in sections of vent
pipe positioned below. It also helps prevent freezing
of the coil due to wind chill factors.
Figure 3
Optional
ceiling, each to be sized on the basis of one square
inch or more of free area for each 1,000 BTU input
per hour (see Figure 4).
When a room is of unusually tight construction and
has a ventilating fan, which may be used for ex-
hausting air outdoors -or has a vented exhaust — it
is recommended that combustion air be supplied to
the enclosed room through intakes extending to the
outside of the building and terminating in down-turned
fittings. These should be suitably arranged to prevent
obstruction from snow or rain, and include a protecting
screen not smaller than 1/4 inch mesh.
Figure 4
Ventilating Air Opening.
1 square inch for each
1000 BTU per hour input.
Illustration showing air openings necessary
to supply air for combustion when installed
in an enclosed room.
Water Source:
The water source for the machine should be supplied
by a 5/8" I.D. garden hose with a city water pressure of
not less than 30 PSI. If the water supply is inadequate,
or if the garden hose is kinked, the machine will run
very rough and the burner will not fire.
Water Connection:
Connect the high pressure hose by pulling the coupler
collar back and then inserting it onto the discharge
nipple. Secure it by pushing the collar forward.
Attach the wand into the spray gun using teflon tape
on the pipe threads to avoid leaks.
Inspection and Testing Gas Piping:
The building structure should not be weakened by
installing the gas piping. The piping should not be
supported by other piping, but should be firmly sup-
ported with gas hooks, straps, bands or hangers. Butt
or lap welded pipe should not be run through or in an
air duct or clothes chute.
When in a tightly closed room without ventilation open-
ings to the outdoors or other rooms, provisions shall be
made for supplying air for combustion through special
openings, one near the floor and the other near the

SHARK HNG • 97-610 • REV. 3/06
OPERATOR’S MANUAL PRESSURE WASHER
12
INSTALLATION
Before turning gas under pressure into piping, all open-
ings from which gas can escape should be closed.
Immediately after turning on gas, the system should
be checked for leaks.This can be done by watching the
1/2 cubic foot test dial for 5 minutes for any movement
or by soaping each pipe connection and watching for
bubbles.If a leak is found, make the necessary repairs
and repeat the above test.
Defective pipes or fittings should be replaced and not
repaired.Never use a flame or fire in any form to locate
gas leaks — use a soap solution.
After the piping and meter have been checked com-
pletely, purge the system of air. DO NOT bleed the air
inside an enclosed room.
During pressure testing of the system at test pres-
sures in excess of 1/2 PSIG, the appliance and its
individual shut-off valve must be disconnected from
the gas supply piping system or damage to the gas
valve will occur.
Gas Pressure:
The ideal incoming gas pressure is 11 water column
inches or w.c.i. (min. 6 wc”, max. 14 wc” or 1/2 PSIG).
The correct operating manifold pressure for natural gas
is 3.5 wc”The operating manifold pressure for propane
gas is 10 wc” By adjusting the gas valve pressure
regulator between 3 and 4 wc” a side range can be
achieved for natural gas. Propane is 6-10 wc”.
If the desired input rating cannot be obtained within the
above manifold pressure adjusting range, then the next
size larger or smaller burner orifice should be used.
CHECK LIST BEFORE
STARTING:
CAUTION! If “NO” is checked on any of the fol-
lowing sixteen questions, do not operate this
machine.
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
If you do not follow these instructions exactly, a fire or
explosion may result, causing property damage, personal
injury or loss of life.
A. This appliance has a pilot which must be lighted by
hand.
When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
FOR YOUR SAFETY
"WHAT TO DO IF YOU SMELL GAS"
� Do not try to light any appliance.
� Do not touch any electrical switch, do not use any phone
in your building.
� Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
� If you cannot reach your supplier, call the fire
department.
C. Use only your hand to push in or turn the gas control
knob. Never use tools. If the knob will not push in or turn
by hand, don't try to repair it; call a qualified service
technician. Forced or attempted repair may result in a
fire
or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
YES NO
Has gas supply been inspected by an
authorized contractor to meet local
codes?
Is machine protected from downdraft and
excessive wind?
Is machine shielded from moisture or
water spray?
Is the voltage correct and are the circuit
breaker and supply cord adequate
according to specifications and serial
plate notation?
Is the machine electrically grounded?
Is there ample water supply?
Have all flammable liquids or gases been
removed from installation location?
Is there adequate gas supply for the BTU
rating of the burner?
Is incoming gas supply pressure between
6 - 14 water column inches or 1/2 PSIG?
Has the proper gas regulator been
installed for pressure and volume?
Is the machine properly vented to allow
adequate air flow?
Are the propane tanks large enough,
according to rating to prevent freezing
(vapor propane machines only)?
Have gas lines been checked for gas
leaks?
Have gas lines been checked with local
codes?
Have all operators using this machine
been instructed properly & have they
read the manual?
Has the machine been installed
according to operator's manual
instructions?

SHARK HNG • 97-610 • REV. 3/06
13
PRESSURE WASHER OPERATOR’S MANUAL
ASSEMBLY INSTRUCTIONS
STEP 1: Attach the high pressure
hose to the spray gun using teflon
tape on hose threads.
STEP 3: Release the coupler collar
and push the nozzle until the collar
clicks. Pull the nozzle to make sure
it is seated properly.
STEP 4: Connect the high pressure
hose to the pump discharge fitting.
Push coupler collar forward until
secure.
STEP 2: Pull the spring-loaded col-
lar of the wand coupler back to in-
sert your choice of pressure nozzle.
CAUTION: Never replace nozzles
without engaging the safety latch
on the spray gun trigger.
STEP 5: Connect garden hose to
the cold water source.
STEP 6: Check inlet filters, re-
move debris, then connect the
garden hose to pump water inlet.
CAUTION: Do not run the pump
without water or pump damage
will result.
Safety
Latch
Spray
Gun
High Pressure
Hose
Wand
Coupler
Pressure
Nozzle
Pressure
Nozzle Wand
Coupler
Wand
Collar
Cold Water
Source
Garden
Hose Water Inlet
Garden
Hose

SHARK HNG • 97-610 • REV. 3/06
OPERATOR’S MANUAL PRESSURE WASHER
14
OPERATING INSTRUCTIONS
STEP 1: Review installation instruc-
tions prior to connecting garden
hose to the cold water source and
turn water on completely.Never use
hot water.
STEP 2: Trigger the spray gun to
eliminate trapped air then wait for a
steady flow of water to emerge from
the spray nozzle.
Cold Water
Source
Garden
Hose
WARNING! Never replace noz-
zles without engaging the safety
latch on the spray gun trigger.
The five color-coded quick connect nozzles provide a
wide array of spray widths from 0° to 45° and are easily
accessible when placed in the convenient rubber nozzle
holder, which is provided on the front of the machine.
NOTE: For a more gentle rinse, select the white 40°
or green 25° nozzle. To scour the surface, select the
yellow 15° or red 0° nozzle. To apply detergent select
the black nozzle.
NOZZLES
Safety
Latch
STEP 3: Have an electrician con-
nect power supply into junction box
according to information shown on
the serial plate before turning gas
valve dial to “PILOT” position.
STEP 5: Turn gas cock dial (located
on rear of machine) to “PILOT” po-
sition. Release dial and turn to full
ON. Push pump switch ON, or turn
to pump position and pull the trigger
on the spray gun allowing cold water
to flow. To activate the gas control
valve for hot water, push the burner
switch to the ON position and pull
the trigger on the spray gun.
AUTO IGNITION OPTION
If your machine has Auto Ignition option,
follow these steps.
1. Have electrician connect power supply into junction
box according to information shown on serial plate
and open main gas supply.
2. Push pump switch to “ON” position, pull trigger on
spray gun.
3. After water and pressure is exiting pressure nozzle
push burner switch “ON”. Note: Thermostat should
be set at 200°.
4. The pilot will ignite first then you will notice a flash of
light indicating complete ignition. Note: You should
hear a clicking sound before the pilot ignites.
STEP 4: Depress control knob and
hold it in. After 5 seconds, depress
the red ignitor until you hear a loud
click. Repeat 3 or 4 times if nec-
essary until pilot is lit. If pilot does
not remain lit, repeat operation,
allowing a longer period of time
before releasing the knob. After the
pilot lights, continue to hold the con-
trol knob down for 1 minute. Note:
Sufficient time must be allowed for
a proper size pilot flame to heat the
thermocouple and hold the safety
magnet in a locked-up position.
Pump
Switch
Burner
Switch

SHARK HNG • 97-610 • REV. 3/06
15
PRESSURE WASHER OPERATOR’S MANUAL
WARNING: Some detergents
may be harmful if inhaled or in-
gested, causing severe nausea,
fainting or poisoning.The harm-
ful elements may cause property
damage or severe injury.
STEP 1: Use detergent de-
signed specifically for pressure
washers. Household deter-
gents could damage the pump.
Prepare detergent solution as
required by the manufacturer.
Fill a container with pressure
washer detergent.
STEP 2: Place siphon tube
strainer into detergent con-
tainer open detergent valve.
Place the filter end of detergent
suction tube into the detergent container.
STEP 3: Pull trigger to oper-
ate machine. Liquid detergent
is drawn into the machine
and mixed with water. Apply
detergent to work area. Do
not allow detergent to dry on
surface. Follow operating in-
structions.
IMPORTANT: You must flush the detergent si-
phoning system after each use by placing the suc-
tion tube into a bucket of clean water, then run the
pressure washer for 1-2 minutes.
THERMAL PUMP PROTECTION
If you run your pressure washer for 3-5 minutes without
pressing the trigger on the spray gun, circulating water
in the pump can reach high temperatures. When the
water reaches this temperature, the pump protector
engages and cools the pump by discharging the warm
water onto the ground. This thermal device prevents
internal damage to the pump.
CLEANING TIPS
Pre-rinse cleaning surface with fresh water. Place de-
tergent suction tube directly into cleaning solution and
apply to surface at low pressure (for best results, limit
your work area to sections approximately 6 feet square
and always apply detergent from bottom to top). Allow
detergent to remain on surface 1-3 minutes. Do not al-
low detergent to dry on surface. If surface appears to
be drying, simply wet down surface with fresh water. If
needed, use brush to remove stubborn dirt. Rinse at
high pressure from top to bottom in an even sweeping
motion keeping the spray nozzle approximately 1 foot
from cleaning surface. Use overlapping strokes as you
clean and rinse any surface. For best surface cleaning
action spray at a slight angle.
Recommendations:
• Before cleaning any surface, an inconspicuous
area should be cleaned to test spray pattern and
distance for maximum cleaning results.
• If painted surfaces are peeling or chipping, use
extreme caution as pressure washer may remove
the loose paint from the surface.
• Keep the spray nozzle a safe distance from the
surface you plan to clean. High pressure wash a
small area, then check the surface for damage. If
no damage is found, continue to pressure wash-
ing.
CAUTION - Never use:
• Bleach, chlorine products and other corrosive
chemicals
• Liquids containing solvents (i.e., paint thinner,
gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products
• Acid-based products
These chemicals will harm the machine and will dam-
age the surface being cleaned.
RINSING
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun. Select and install de-
sired high pressure nozzle. NOTE: You can also stop
detergent from flowing by removing detergent siphon
tube from bottle.
WARNING
DETERGENTS & GENERAL CLEANING TECHNIQUES

SHARK HNG • 97-610 • REV. 3/06
OPERATOR’S MANUAL PRESSURE WASHER
16
SHUTTING DOWN AND CLEAN-UP
STORAGE
CAUTION: Always store your pressure
washer in a location where the temperature
will not fall below 32°F (0°C). The pump in
this machine is susceptible to permanent damage
if frozen. FREEZE DAMAGE IS NOT COVERED BY
WARRANTY.
1. Stop the pressure washer, squeeze spray gun trig-
ger to release pressure.
2. Detach water supply hose and high pressure
hose.
STEP 1: Remove detergent suc-
tion tube from container and insert
into one gallon of fresh clean water.
Pull trigger on spray gun and siphon
water for one minute.
STEP 2: Turn/push burner switch to
"OFF" position. Open spray gun al-
lowing water to cool.Then turn/push
pump switch to “OFF” position.
STEP 3: Turn off water supply. STEP 5: Engage the spray gun
safety lock.
STEP 4: Press trigger to release
water pressure.
Safety Latch
3. Turn on the machine for a few seconds, until re-
maining water exits. Turn off immediately.
4. Do not allow high pressure hose to become
kinked.
5. Store the machine and accessories in a room which
does not reach freezing temperatures.
CAUTION: Failure to follow the above directions will
result in damage to your pressure washer.
Burner
Switch
Pump
Switch

SHARK HNG • 97-610 • REV. 3/06
17
PRESSURE WASHER OPERATOR’S MANUAL
BASIC FACTS
PRESSURE EQUIVALENTS
Simply stated, pressure is the force exerted by a gas or liquid attempting to escape from a container. It is useful
to know how strong this “attempt to escape” is. Pressure can be measured with a manometer or with a pressure
gauge. At the lower levels, it is expressed in “water column inches” i.e. 11 w.c.i. Higher pressures are expressed
in terms of the force exerted against a square inch of area, for example, 125 lbs. per square inch (125 psi).
Based on 60
o
Propane Butane
1 Cu. Ft. NG Approx 1,000 BTU
Formula C3H8 C4H10
Vaporization Point (
o
F) -43.7 31.1
Specific Gravity (Vapor) 1.522 2.006
Specific Gravity (Liquid) 0.508 0.584
Lbs. per Gal. (Liquid) 4.23 4.87
BTU per Cu. Ft. (Vapor) 2.563 3.39
BTU per Gal. (Liquid) 91.547 102.032
BTU per Lb. (Liquid) 21.591 21.221
Cu. Ft. per Lb. (Liquid) 8.607 6.53
Cu. Ft. per Gal. (Liquid) 36.45 31.8
Octane Number 125 91
Molecular Weight 44.09 58.12
To Calculate Running Cost: 1,000 BTU = 1 Cu. Ft.
100 Cu. Ft. = 1 Therm
1 Therm = 1 Hour
Cost of Gas per Therm = Cost to Run
Example Using Natural Gas
at 50¢ Therm: 400,000 BTU Machine
400 Cu. Ft. (400,000 / 1,000)
4 x 50¢ = $2.00 / Hour to Run ((400 / 100) x cost of gas)
1 water column inch = 50 oz./sq. in. 11 water column inches = 6.35 oz./sq. in.
11 water column inches = 4 lb./sq. in. 1 lb./sq. in. = 27.71 water column inches
1 lb./sq. in. = 2.04" Mercury 1" Mercury = .39 lb./sq. in
1 Std. Atmosphere = 14.73 lbs./sq. in.

SHARK HNG • 97-610 • REV. 3/06
PRESSURE WASHER Troubleshooting Guide
18
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
NO SPARK - NO
PILOT GAS No main power Restore power.
Faulty limit switch Test/replace.
Faulty wiring Test wiring.
SPARK - BUT NO
PILOT LIGHT
No gas supplied to pilot valve Check for availability of gas.
Manual valves in "OFF" position Turn manual valve and gas cock to full "ON". Check
pilot key adjustment.
Faulty pilot valve Test gas valve.
Faulty wiring Test wiring.
Restricted pilot line or clogged pilot orifice Clean pilot tubing and orifices.
PILOT GAS - BUT
NO SPARK
Broken or shorted electrode assembly Test/replace.
PILOT LIT - BUT
MAIN BURNER
WON'T COME ON
Faulty wiring Test wiring.
Low pilot flame Check inlet pressure, pilot oriface.
Improper alignment of sensor in pilot flame Adjust alignment - see figure 7, page 14.
Faulty main gas operator in gas control Test gas valve - repair/replace.
Faulty flame sensor Test sensor, wiring - repair/replace.
PILOT CYCLES
OFF AND ON BY
ITSELF
Faulty pilot valve Test gas valve.
Faulty wiring Test wiring.
MAIN BURNER
SHUTS DOWN
Low pilot flame Check inlet pressure, pilot oriface.
Improper alignment of sensor in pilot flame Adjust alignment - see figure 7, page 14.
Faulty main gas operator in gas control Test gas valve - repair/replace.
Faulty flame sensor Test sensor, wiring - repair/replace.
LOW OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger garden hose. Clean filter washer at water
inlet.
Old, worn or incorrect spray nozzle Match nozzle number to machine and/or replace
with new nozzle.
Belt slippage Tighten or replace. Use correct belt.
Plumbing or hose leak Check plumbing system for leaks. Retape leaks with
teflon tape.
Faulty or misadjusted unloader valve
(where applicable)
Adjust unloader for proper pressure. Install repair kit
when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet or discharge valves in
pump
Clean inlet and discharge valve.
Worn inlet or discharge valves Replace with valve kit.
Obstruction in spray nozzle Remove obstruction.
Leaking pressure control valve (where
applicable)
Rebuild or replace as needed.
Detergent metering valve left open sucking
air or faulty metering valve
Close and/or replace metering valve.
Slow motor RPM Check incoming voltage.
LOW WATER
TEMPERATURE
Improper size of gas lines See page 7 for sizing of gas lines.
Low gas pressure Increase gas pressure to machine.
Improper pressure regulator Specify BTU, building gas pressure 11 w.c.i. to
machine for correct sizing of regulator.
Low gas pressure Increase gas pressure as described on page 8.
Soot buildup on coils not allowing heat
transfer
Clean coils.
Improper burner nozzle See serial plate.

SHARK HNG • 97-610 • REV. 3/06
19
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm or hot Lower incoming water temperature.
Gas pressure too high See page 10 for specifications for proper gas
pressure.
Detergent line sucking air Tighten all clamps. Check detergent lines for holes.
Defective high limit switch Replace.
Incorrect burner nozzle size See serial plate.
Insufficient water supplied Check water GPM to machine.
Restricted water flow Check nozzle for obstruction, proper size.
PRESENCE OF
WATER IN OIL
Oil seal worn Check and replace if necessary.
High humidity in air Check and change oil twice as often.
WATER
DRIPPING FROM
UNDER PUMP
Piston packing worn Check and replace if necessary.
O-Ring plunger retainer worn Check and replace if necessary.
DETERGENT NOT
DRAWING
Air leak Tighten all clamps. Check detergent lines for holes.
Detergent metering valve packing not tight
or packing worn
Tighten nut. Replace valve or packing.
Filter screen on detergent suction hose
plugged
Clean or replace.
Dried up detergent plugging metering valve Disassemble and clean thoroughly.
High viscosity of detergent Dilute detergent to specifications.
Restriction behind float tank screen
removed
Install restriction.
Hole in detergent line(s) Repair hole.
Strainer basket plugged Remove and clean.
Connections on selector valve loose Put teflon tape on all pipe connections.
Detergent solenoid not opening (where
applicable)
Check flow switch, replace detergent solenoid.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON
INSTALLATION
Pump sucking air Check water supply and possibility of air seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle incorrectly sized Check and replace if necessary (See serial plate for
proper size).
Worn piston packing Check and replace if necessary.
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air Check water supply and air seepage at joints in
suction line.
Worn piston packing Check and replace if necessary.
PUMP NOISY Air in suction line Check water supply and connections on suction line.
Broken or weak inlet or discharge valve
springs
Check and replace if necessary.
Excessive matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
OIL DRIPPING Oil seal worn Check and replace if necessary.
EXCESSIVE
VIBRATION IN
DELIVERY LINE
RELIEF VALVE
LEAKS WATER
Irregular functioning of the valves Check and replace if necessary.
Relief valve defective Replace or repair.

SHARK HNG • 97-610 • REV. 3/06
PRESSURE WASHER Troubleshooting Guide
20
Spray Nozzles:
Each machine is equipped with one or more spray noz-
zles, depending on the model. Different spray nozzles
are calibrated for each machine, depending on the flow
and pressure of that particular model. Spray nozzles
vary in bore size and angle of spray. Popular spray
angles are 0°, 15°, 25°, 40°. When ordering, please
specify size and angle of nozzle. Nozzle size for each
machine is located on the serial plate.
Unloader Valves:
Unloader valves relieve pressure in the line when a
spray gun is closed. Unloader valves are preset and
tested at the factory before shipping. Occasional ad-
justment of the unloader may be necessary to maintain
correct pressure. For valve adjustment contact your
nearest dealer or call technical support.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures when-
ever the washer must be stored or operated outdoors
under freezing conditions.
It is necessary to protect your machine against freezing
when temperatures drop below 32° F. Siphoning a small
amount of antifreeze into the system is recommended.
This is done by pouring a 50-50 mix of antifreeze and
water into the float tank and then siphoning 100% an-
tifreeze through the detergent line with the pump on. If
compressed air is available, an air fitting can be screwed
into the float tank strainer fitting, and by injecting com-
pressed air, all water will be blown out of the system.
The use of a draft diverter will prevent the wind chill
factor from freezing the coil.
Low Pressure Diagnosis:
(Machines with spray gun)
Refer to Troubleshooting Chart for low pressure. If the
trouble is found to be either the unloader or the pump,
your next step is to determine which is the problem.
This can be done by eliminating the unloader from the
system and attaching the 50' discharge hose directly
to the pump. If high pressure is developed in this man-
ner, the pump is good and the unloader needs to be
repaired or replaced.If low pressure is still present, then
the pump needs repairing.
CAUTION: When using this procedure to test com-
ponents keep the spray gun open at all times.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with an adjustable
thermostat. In the event the temperature of the water
should exceed its operating temperature, the thermostat
will turn the burner off until the water cools.
Pumps:
Use only SAE30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals.Oil level should be
checked through use of the dipstick found on the top of
the pump or by the red dot visible through the oil gauge
window. Oil should be maintained at that level.
HEATING COILS
To Check Water Heater Coil for Leaks:
With the main burners "OFF" start the pumping unit
and allow it to run for a few minutes. With a drop light
or flashlight, check the burner compartment. If no leaks
are visible and water is dripping from the coils, then it
is condensation from the flue gases when the burners
are on.
Condensation from Heating Coil:
When cold water is being pumped into the water heater
coils and the burners are on, condensation will form on
the coils and drip down into the burner compartment.
This will give the appearance of a leaking coil, particu-
larly on cold humid days.
Deliming Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased
by the extreme heat build up in the coil. The best
prevention for liming conditions is to use high quality
cleaning detergents. In areas where alkaline water is an
extreme problem, periodic use of Manufacturers Delim-
ing Powder (part #9-028008) will remove lime and other
deposits before coil becomes plugged. (See following
Instructions for use of Deliming Powder.)
Periodic flushing of coils is recommended.
1. Fill a container with 4 gallons of water, then add 1
lb. of deliming powder. Mix thoroughly.
2. Remove nozzle from spray gun assembly and put
spray gun into container. Secure the trigger on the
spray gun into the open position.
3. Attach a short section (3-5 ft.) of garden hose to
machine to siphon solution from an elevated con-
tainer, or add mixture to the float tank. Turn pump
switch on allowing solution to be pumped through
coils and back into the container. Solution should
be allowed to circulate 2-4 hours.
4. After circulating solution, flush entire system with
fresh water. Reinstall wand assembly to spray
gun.
MAINTENANCE & SERVICE