Graco 2730B User manual

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Rev. B
First choice when
quality counts.t
INSTRUCTIONS
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
Direct-Drive Pressure Washers
2730B
Model 244389, Series A with Briggs & Stratton 6.5 HP Motor
2700 psi (186 bar, 18.6 MPa) Operating Pressure
3000 psi (206 bar, 20.6 MPa) Maximum Working Pressure
2730H
Model 244390, Series A with Honda 6.5 HP Motor
2700 psi (186 bar, 18.6 MPa) Operating Pressure
3000 psi (206 bar, 20.6 MPa) Maximum Working Pressure
3030
Model 244391, Series A
3000 psi (206 bar, 20.6 MPa) Operating Pressure
3300 psi (227.5 bar, 22.75 MPa) Maximum Working Pressure
3340
Model 244392, Series A
3300 psi (227.5 bar, 22.75 MPa) Operating Pressure
3600 psi (248 bar, 24.8 MPa) Maximum Working Pressure
3540
Model 244393, Series A
3500 psi (241 bar, 24.1 MPa) Operating Pressure
3800 psi (262 bar, 26.2 MPa) Maximum Working Pressure
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 2001 GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
3340 Pressure Washer
Model 244392 Shown
7329B

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Table of Contents
Symbols 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Identification 4. . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief Procedure 7. . . . . . . . . . . . . . . . . . . . . . .
Installing and Changing Spray Tips 15. . . . . . . . . . . . . .
Pump Service 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 32. . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow instruc-
tions.

Equipment Misuse Hazard: Misuse of pressure
washer or accessories can cause the equipment to
rupture or malfunction and result in serious injury.
DDo not alter or modify any part or factory–set ting
DCheck equipment daily. Repair or replace worn
or damaged parts immediately.
DDo not exceed maximum working pressure (MWPR) of the lowest–
rated system component
DUse fluids and solvents that are compatible with the equipment
wetted parts. See Specifications on page for this information.
DWear hearing protection when operating this equipment.
DDo not “blow back” fluid; this is not an air spray system
DFollow Pressure Relief before cleaning, checking or servicing the
equipment.
Injection Hazard: Spray from gun, leaks or
ruptured components can inject fluid into your body
and cause serious injury. Fluid splashed in eyes or
on skin can also cause serious injury.
DFluid injected into the skin might look like just a
cut, but it is a serious injury. Get emergency
medical attention.
DDo not point the gun at anyone or any part of the
body.
DDo not stop or deflect leaks with hand, body, glove, or rag.
DDo not put your hand or fingers over the spray tip.
DTIghten fluid connections before you start this equipment.
DEngage the gun safety whenever you stop spraying.
DFollow Pressure Relief Procedure on page 7 if the spray tip
clogs and before you clean, check or service this equipment.
DRepair or replace worn or damaged parts immediately.
DCheck hoses, tubes, and couplings daily. Do not repair high–pres-
sure couplings. Replace entire hose. Fluid hoses must have
spring guards on both ends to prevent kinks and rupture.
TOXIC FLUID HAZARD: Hazardous fluid or toxi
fumes can cause serious injury or death if
splashed in eyes or on skin, inhaled, or
swallowed.
DKnow specific hazards of fluids you are
using and take protective measures as
recommended by the fluid and solvent
manufacturer.
Fuel Hazard: The fuel used in this pressure
washer is combustible. When spilled on a hot
surface it can ignite and cause a fire.
Do not fill fuel tank while engine is running or hot.
Exhaust Hazard: The exhaust contains poisonous
carbon monoxide, which is colorless and odorless.
Do not operate this equipment in a closed building.
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Component Identification
D
Gun and wand
Oil Level Site Gauge
High Pressure Hose
Connection
Hose
On/Off Engine Switch (side)
Water Pump Oil Fill
Engine Oil Fill
Pressure Unloader
Adjustment Knob
Tip Storage
Hose Rack (a)/Gun Holder (b)
(b)
(a)
Garden Hose
Connection

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Shipping Damage
Check the pressure washer for shipping damage. Notify the carrier immediately if there is any damage.
Setup
Connect High–Pressure Hose and Gun
Connect the high–pressure hose between the pump outlet and gun inlet.
Both of these connections are made with quick couplers.
Install Spray Tip
Install the spray tip on the wand. Installing and Changing Spray Tips, page 15). If you are using a Sandblast-
ing Kit, see its separate manual for installation instructions.
Up to 100 ft (30 m) of 3/8”high–pressure hose may be used. Longer hoses could affect pressure
washer and chemical injector performance balance.
CAUTION

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Connect to Water Supply
CAUTION
Before you connect the garden hose to the pressure washer, check your local plumbing code regarding
cross–connection to the water supply. If required, install a backflow preventer.
If the inlet water pressure is over 60 psi (4.1 bar), a regulating water valve must be installed at the garden
hose connection.
Do not exceed 160_F (70_C) inlet water temperature.
NOTE: The water source must have a minimum flow rate equal to that of the pressure washer.
Connect hose with at least a 3/4–in (19 mm) ID
from the water supply to the 3/4–in garden hose
inlet on the pressure washer. The supply hose
should not be more than 50 ft (15 m) long.

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PRESSURE RELIEF
Follow these instructions whenever you are instructed to relieve
pressure, stop spraying for more than 10 minutes, check or service
the equipment, or install or clean the spray nozzle.
1. Engage trigger safety latch
2. Turn pressure washer off

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3. Remove ignition cable from spark plug.
4. Shut off water supply. Disconnect from water.
5. Disengage trigger safety latch and trigger the gun to
relieve pressure. Then re–engage the safety latch.
Note: If you suspect that the spray tip or hose is clogged or that pressure has not been fully relieved after
following the steps above, disengage the trigger safety latch and trigger the gun to relieve pressure.

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1. Check the oil level of the engine and pump.
Startup
Always use this startup procedure to ensure that the pressure washer is started safely and properly.
DAlways engage the gun trigger safety latch when you stop spraying. This reduces the risk of fluid
injection or splashing in the eyes or on the skin if the gun is bumped or triggered accidentally.
DAlways obser e the CAUTIONS in this section to a oid costly damage to the pressure washer.
DIf you use the Sandblaster Kit, see the Sandblaster Kit Manual for detailed cleaning information.
.
Operation
NOTE: All Honda engine powered pressure washers are equipped with an engine low-oil sensor that shuts the
engine off if the oil level falls below a certain level. If the engine stops unexpectedly, check the oil and the fuel
levels. Check the oil level each time you add fuel.
Oil level

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2. Check fuel level.
3. Check oil level in pump. It should be half way up the sight
glass located on the front of the pump. Add pump oil as
necessary. The system is equipped with a thermal over-
load to help prevent severe damage.
Operation
FIRE HAZARD
Do not refuel a hot engine. Refueling a hot engine could cause a fire. Use only fresh, clean,
regular or unleaded gasoline. Close the fuel shutoff valve during refueling.
WARNING
Oil level
Fuel level
NOTE: It is important to drain and refill the pump oil after the first 50 hours of operation.

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4. Turn on water supply.
5. Trigger the gun until a constant stream of water sprays from the tip indicating
the air is purged from the system.
6. Open fuel shutoff valve. Be sure the spark plug ignition
cable is pushed firmly onto the spark plug.
7. Put the switch in the ON position and the throttle at HALF
throttle.
Never run pressure washer without water. Costly damage to the pump will result. Always be sure the water
supply is completely turned on before you run the pressure washer.
CAUTION

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8. Pull the starter rope quickly to start the engine.
Pull and return the rope until the engine starts.
HINT: Placing one foot on the pressure washer
as a brace provides better leverage.
Do not allow pressure washer to idle for more than 10 minutes. This causes the recirculating water to
overheat and serious damage to pump. Turn off pressure washer if it will not be spraying at least every 10
minutes. If heated inlet water is used, reduce this time more. Do not operate pressure washer with inlet
water screen removed. This screen helps keep abrasive sediment out of pump, which could clog pump or
damage cylinders. Keep screen clean. Do not pump caustic materials; such materials could corrode pump
components.
CAUTION

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NOTE: For easier starting, have one person start pressure washer while another triggers gun.
DIf engine is cold, start engine with choke completely closed. In cool weather, you might ha e to let enĆ
gine run with choke closed for first 10-30 seconds. In warm weather, open choke completely as soon
as engine starts.
DIf engine is warm, start engine with choke completely open or partially closed. When engine starts open
choke completely.
Trigger Safety Latch
Always engage the safety latch when you stop spraying.
engaged disengaged
Always engage the trigger safety latch when you stop spraying even for a moment. The engaged, safety
latch prevents the gun from being triggered accidentally by hand or when dropped or bumped. Be sure
the latch is pushed fully down, or it will not prevent the gun from being triggered.
WARNING
OPEN
HALF
CLOSED

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1. Follow Pressure Relief Procedure (page 7).
Chemical Injector Operation
2. Insert chemical filter (attached with clear tubing to
chemical injector) into the container of chemical.
Insert brass coupler into chemical injector.
3. Install the black, large–orifice, chemical tip. (Instal-
ling and Changing Spray Tips page 15).
The large orifice of the chemical tip causes a drop in
pressure that actuates the chemical injector. Changing
back to a small orifice spray tip deactivates the chemi-
cal injector and produces high pressure for rinsing.
The chemical filter can be left in the chemical container
during high–pressure use. To regulate the flow rate of
the chemical, turn the chemical adjustment knob on the
injector.

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Spray tips have 4–or 5–digit numbers on them.
The first two digits are the spray angle. Tip
holding holes are provided on the chassis.
1. Perform Pressure Relief Procedure (page 7.
2. Point the gun and wand away from you and anyone else.
3. Without holding your hand over the spray tip (A), pull back the
quick coupler ring (B). Remove the current tip, install a differ-
ent one. Then push the ring back on.
Installing and Changing Spray Tips
Spray Tip
Number
Spray Pattern Fan Angle
00XXX
15XXX
25XXX
40XXX
Chemical
0_blaster (red)
15_(yellow)
25_(green)
40_(white)
XX_(black)
NOTE: The chemical injector tip is brass and has a large opening and a black plastic cap.
B
A

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To avoid blowing the O-ring out of the quick coupler due to the high pressure in the system, never operate
the pressure washer without a tip securely mounted in the quick coupler.
Shutdown, Flushing, and Storage
If water freezes in the pressure washer, thaw it in a warm room before you try to start it. Do not pour
hot water on or into the pump; it could crack the ceramic plungers.
DIf the pressure washer will be exposed to freezing temperatures, drain all water out of the pump. If it must
be stored in freezing temperatures, flush the pressure washer with a 50% antifreeze solution, and relieve
the pressure. Flush the pressure washer before you use it again to remove the antifreeze.
CAUTION
CAUTION

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DAfter each use, wipe all surfaces of the
pressure washer with a clean, damp cloth.
DBefore you store the pressure washer
overnight or transport it, disconnect the water
supply, and turn off the fuel supply valve.

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Maintenance Chart
Perform Pressure Relief Procedure (page 7).
Interval What to do
Daily Clean water inlet screen and filter. Check engine and pump oil levels. Fill as necessary. Check
gasoline level. Fill as necessary.
After first
5 hours of
operation
Change engine break-in oil. Drain oil when warm. Use SAE 30 or 10W–30 detergent oil.
After every
25 hours of
operation
Clean and remove air cleaner foam. Wash with water and detergent. Dry thoroughly. Rub with
oil, and squeeze to distribute oil.
After first
50 hours of
operation
Change pump break-in oil. Use Use approved SAE 20/30 pump oil.
After every
100 hours of
operation, or
every 3 months
Clean or replace paper air cleaner cartridge. Tap gently to remove dirt. Change engine oil. Use
SAE 30 or 10W–30 detergent oil.
After every
500 hours of
operation, or
every 6 months
Change pump oil. Use approved SAE 20/30 pump oil.

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Troubleshooting
Perform Pressure Relief Procedure (page 7).
Problem Cause Solution
Engine will not start or
is hard to start.
No gasoline in fuel tank or carburetor Fill tank with gasoline, open fuel shutoff valve.
Check fuel line and carburetor.
Low oil Add oil to proper level.
Start/Stop switch in STOP position Move switch to START position
Water in fuel or old fuel Drain fuel tank and carburetor. Use new fuel
andmake sure spark plug is dry.
Engine flooded or improperly choked Open choke, pull engine starter rope several
times to clear out fuel. Make sure spark plug
is dry.
Dirty air cleaner filter Remove and clean.
Spark plug dirty, wrong gap, or wrong
type
Clean, adjust gap or replace.
Gun not triggered Trigger gun while starting engine.
6.5 hp Briggs & Stratton model may
experience “vapor lock”due to gas type
and temperature
Allow unit to cool approximately 15 minutes
and restart.
Engine misses or
lk
Partially plugged air cleaner filter Remove and clean.
lacks power Valve adjustment (lash) worn Adjust valve lash to manufacturer’s
specification.
Spark plug dirty, wrong gap, or wrong
type
Clean, adjust gap or replace.
Pressure is too low
d/
Worn or wrong size tip Replace with tip of proper size.
and/or pump runs
roughly
Inlet filter clogged Clean. Check more frequently.
roughly
Worn packings, abrasives in water, or
natural wear
Check filter. Replace packing.
Inadequate water supply Check water flow rate to pump.
Fouled or dirty inlet or discharge valves Clean inlet and discharge valve assemblies.
Check filter.
Restricted inlet Garden hose might be collapsed or kinked.
Worn inlet or discharge valves Replace worn valves.
Leaking high–pressure hose Replace high–pressure hose.
Water leaks from
under pump minifold
Worn packings Install new packings.
Water on oil side of
pump
Humid air condensing inside crankcase Change oil as specified in Maintenance Chart
(page 18).
Worn packings Install new packings.
Oil seals leaking Install new oil seals.

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Problem Cause Solution
Packings are failing
freq entl or
Scored, damaged, or worn plungers Install new plungers.
frequently or
pr
e
m
atu
r
e
l
y
Abrasive material in fluid being pumped Install proper filtration on pump inlet plumbing.
rematurely
Inlet water temperature too high Check water temperature. It should not
exceed 160_F (70_C).
Overpressurizing pump Do not modify any factory–set adjustments.
Excessive pressure due to partially
plugged or damaged tip
Clean or replace tip. See Installing and
Changing Spray Tips (page 15).
Pump running too long without spraying Never run pump more than 10 minutes without
spraying.
Running pump dry Do not run pump without water.
Strong surging at inlet
and low pressure on
discharge side
Foreign particles in inlet or discharge
valve or worn inlet and/or discharge
valves
Clean or replace valves.