308–529
INSTRUCTIONS-PARTS LIST
Rev
A
This manual contains IMPORTANT
WARNINGS and INSTRUCTIONS READ
AND RETAIN FOR REFERENCE
HYDRA-CLEANR 2540, 3040
Pressure Washer
HYDRA–CLEAN 2540, 9 HP ENGINE
P/N 800–638, Series A
P/N 800–690, Series A
2500 psi (172 bar) OPERATING PRESSURE
3000 psi (207 bar) MAXIMUM WORKING PRESSURE
HYDRA–CLEAN 3040, 11 HP ENGINE
P/N 800–639, Series A
3000 psi (207 bar) OPERATING PRESSURE
3400 psi (234 bar) MAXIMUM WORKING PRESSURE
GRACO INC. P.O. Box 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 1990, GRACO INC.
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EQUIPMENT MISUSE HAZARD
General Safety
System Pressure
Any misuse of the pressure washer or accessories,
such as overpressurizing, modifying parts, using
incompatible chemicals and fluids, or using worn or
damaged parts, can cause them to rupture and result in
fluid injection, splashing in the eyes or on the skin, or
other serious bodily injury , fire, explosion or property
damage.
This sprayer can develop high operating pressures. Be
sure that all spray equipment and accessories are rated
to withstand the maximum working pressure of this
sprayer. DO NOT exceed the maximum working
pressure of any component or accessory used in the
system.
Chemical Compatibility
NEVER alter or modify any part of this equipment;
doing so could cause it to malfunction.
BE SURE that all chemicals used in the chemical
injector are compatible with the wetted parts of the
hose, gun, wand and tip, as given in the Technical Data
(inside back cover). Always read the chemical
manufacturer’s literature before using any chemical in
CHECK all spray equipment regularly and repair or
replace worn or damaged parts immediately
.
this pressure washer
.
ALWAYS wear protective eyewear and appropriate
clothing. If using a chemical injector , read and follow
the chemical manufacturer
recommendations on additional protective equipment,
such as a respirator
’s literature for
.
HOSE SAFETY
High pressure fluid in the hoses can be very dangerous.
If the hose develops a leak, split or rupture due to any
kind of wear , damage or misuse, the high pressure
spray emitted from it can cause a fluid injection injury or
other serious bodily injury or property damage.
NEVER use a damaged hose. Before each use, check
entire hose for cuts, leaks, abrasion, bulging cover, or
damage or movement of the hose couplings. If any of
these conditions exist, replace the hose immediately .
DO NOT try to recouple high pressure hose or mend it
with tape or any other device. A repaired hose cannot
contain the high pressure fluid.
ALL FLUID HOSES MUST HAVE STRAIN RELIEFS
ON BOTH ENDS. The strain reliefs help protect the
hose from kinks or bends at or close to the coupling,
which can result in hose rupture.
HANDLE AND ROUTE HOSES CAREFULLY. Do not
pull on hoses to move the pressure washer. Do not use
chemicals which are not compatible with the inner tube
and cover of the hose. DO NOT expose Graco hose to
TIGHTEN all fluid connections securely before each
use. High pressure fluid can dislodge a loose coupling
or allow high pressure spray to be emitted from the
coupling.
temperatures above 200 _
F (93 _
C) or below
–40_ F (–40_ C).
FUEL AND EMISSION HAZARDS
NEVER fill the fuel tank while the unit is running or hot.
The fuel used in this unit is combustible and when
spilled on a hot surface can ignite and cause a fire.
ALWAYS fill tank slowly to avoid spilling.
odorless, invisible gas which can cause serious injury
or death if inhaled.
NEVER alter the throttle setting, which is factory set.
Tampering with this adjustment can damage the
NEVER operate the unit in a closed building. The
pressure washer and will void the warranty.
exhaust contains carbon monoxide, a
poisonous,
3
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MOVING PARTS HAZARD
Moving parts can pinch or amputate fingers or other
body parts. KEEP CLEAR of moving parts when
Pressure Relief Procedure before checking or
servicing the pressure washer to prevent discharging
high pressure fluid from the gun.
starting or operating the pressure washer
.
NEVER operate the pressure washer without all guards
and interlocks installed and functioning. Follow the
TERMS
WARNING: Alerts user to avoid or correct conditions
NOTE: Identifies helpful procedures and information.
that could cause bodily injury
.
CAUTION: Alerts user to avoid or correct conditions
that could cause damage to the equipment.
IMPORTANT
United States Government safety standards have been adopted under the Occupational Safety and Health Act. These
standards—particularly the General Standards, Part 1910, and the Construction Standards, Part 1926—should be
consulted.
4
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INSTALLATION
QUICK
COUPLER
SPRAY
GUN
QUICK
COUPLER
SPRAY
HOSE
HIGH
PRESSURE HOSE
CONNECTION
INLET WATER
CONNECTION 3/4”
GARDEN HOSE
Figure
1
Check for Shipping Damage
Connect to Water Supply
Check the unit for any damage that may have occurred
in shipping. Notify the carrier immediately if there is
any damage.
CAUTION
Before attaching to the water supply, check your
local plumbing code regarding cross– connection
to the water supply . A backflow preventer , P/N
801–133, is available to prevent backflow of
contaminated water into the fresh water supply .
Install it upstream from the pump.
Set Up
If you are using a downstream chemical injector, install
it between the pump unloader and the high pressure
hose, using the quick couplers provided.
If inlet water pressure is over 60 psi (4.1 bar) a
regulating water valve, P/N 800–258, must be
installed at the garden hose connection.
Connect the high pressure hose between the pump
outlet and the gun inlet. Both of these connections are
made with quick couplers.
Do not exceed 160 _ F (70_ C) inlet water
CAUTION
temperature.
Up to 100 ft (30 m) of high pressure hose may
be used. Longer hoses may af
performance, and chemical injector performance,
if used.
fect sprayer
Connect a hose with at least a 3/4 inch (19 mm) ID from
the water supply to the unit’s 3/4 inch garden hose inlet.
The supply hose should not be more than 50 ft (15 m)
long.
Install the appropriate spray tip on the wand.
Installing and Changing Spray Tips. If you are using a
sandblaster kit, see its separate manual for installation
instructions.
See
NOTE: The water source at the unit must have a
minimum flow rate equal to that of the unit
(see Technical Data, inside back cover).
5
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STARTUP
Always use this startup procedure to ensure that the
If the engine is cold, completely close the engine
choke. Grasp the starter rope, brace one foot on
the pressure washer chassis and pull rope rapidly
and firmly. Continue holding the rope as it returns.
Pull and return the rope until the engine starts. In
cool weather, the choke may have to be kept closed
for 10 to 30 seconds before opening it to keep the
engine running. Otherwise, open the choke as
soon as the engine starts.
unit is started safely and properly
.
1. Check oil levels.
Engine: Add SAE 30 or 10W–30 weight detergent
oil as necessary
.
Pump: Add SAE 20 or 30 weight non–detergent oil
as necessary
.
If the engine is warm, leave the choke open, or just
partly close it. Start the engine as described in the
preceding paragraph. When it starts, be sure to
NOTE: Some units are equipped with a low–oil
sensor that shuts the engine off if the oil level
falls below a certain level. If the unit stops
unexpectedly, check both the oil and the fuel
levels. Check the oil level each time the unit is
refueled.
open the choke completely
.
CAUTION
On recoil start engines, never let the starter rope
return by itself. It could jam the recoil system.
2. Check fuel level.
7. ALWAYS engage the gun’ s trigger safety latch
whenever you stop spraying, even for a moment, to
reduce the risk of fluid injection or splashing in the
eyes or on the skin if the gun is bumped or triggered
accidentally.
WARNING
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.
8. ALWAYS observe the following
CAUTIONS to
avoid costly damage to the pressure washer
.
3. Turn on the water supply
.
CAUTION
CAUTION
DO NOT allow the pressure washer to idle for more
than 10 minutes. Doing so may cause the
recirculating water to overheat and seriously
damage the pump. Turn off the pressure washer if it
will not be spraying or cleaning at least every 10
minutes. If heated inlet water is used, reduce this
time further.
Never run the unit dry. Costly damage to the pump
will result. Always be sure the water supply is
completely turned on before operating.
4. Trigger the gun until water sprays from the tip
indicating that the air is purged from the system.
5. Open the fuel shutoff valve. Be sure the spark plug
ignition cable is pushed firmly onto the spark plug.
On those units equipped with an ignition shutof f
switch, put the switch in the “on” position and put
the throttle in the “run” position.
DO NOT run the pump dry , which will quickly
damage the pump. Be sure the water supply is fully
turned on before starting the pump.
DO NOT operate the pressure washer with the inlet
water screen removed. This screen helps keep
abrasive sediment out of the pump, which could
clog or scratch the pump. Keep this screen clean.
6. Start the engine.
NOTE: For easier starting, have one person start the
pressure washer while another person
triggers the spray gun.
DO NOT pump caustic materials; such materials
may corrode the pump components.
9. See the chemical injector or sandblaster kit manual
for detailed cleaning information if these
accessories are used.
6
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Trigger Safety Latch
WARNING
Installing and Changing Spray Tips
WARNING
To reduce the risk of serious bodily injury, including
fluid injection or splashing in the eyes or onto the
skin, use extreme caution when changing spray
To reduce the risk of serious bodily injury
including fluid injection, splashing in the eyes or
on the skin, ALWAYS engage the trigger safety
latch whenever spraying stops, even for a
moment.
,
tips. ALWAYS follow the procedure below
.
1. Follow the Pressure Relief Procedure
.
In the engaged position, the trigger safety latch
prevents the gun from being triggered
accidentally by hand or if it is dropped or bumped.
Be sure the latch is pushed fully down when
engaging it or it cannot prevent the gun from being
triggered. See Figure 2.
2. Point the gun and wand away from yourself and
anyone else.
3. Without holding your hand over the spray tip (A),
pull back the quick coupler ring (B). Remove the old
tip and/or install a new one, and then release the
ring. See Figure 3.
4. Be sure the tip is secure before starting to spray
again.
5. Tip holding holes are provided on the chassis.
CAUTION
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
.
TRIGGER SAFETY LATCH SHOWN ENGAGED
A
B
TRIGGER SAFETY LATCH SHOWN
Figure 3
DISENGAGED
Figure 2
7
308–529
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SHUTDOWN, FLUSHING
AND STORAGE
MAINTENANCE
Observing regular maintenance intervals helps ensure
that you get maximum performance and life from the
WARNING
pressure washer
.
Pressure Relief Procedure
To reduce the risk of serious bodily injury
,
There is a break–in period for the engine, pump and
gear reducer (if used). After changing the oil in these
components following their respective break–in
periods, the interval between required changes is
longer.
including fluid injection and splashing in the eyes,
or on the skin, always follow this procedure
whenever you stop spraying for more than 10
minutes, when shutting down, and before
checking or repairing any part of the system.
If the unit is operating in dusty conditions, these
maintenance checks should be made more often.
1. Engage the trigger safety latch.
2. Turn the sprayer off.
WARNING
To reduce the risk of serious bodily injury
including fluid injection, splashing in the eyes or
on the skin or injury from moving parts, always
follow the Pressure Relief Procedure Warning
before proceeding.
,
3. Remove the ignition cable from the spark
plug.
4. Shut off the water supply
.
5. Disengage the trigger safety latch and trigger
the gun to relieve pressure, and then engage
the trigger safety latch again.
Interval
What to do
Daily
Clean water inlet screen and
filter. Check engine and pump oil
levels. Fill as necessary. Check
6. Before long–term (overnight) storage or
transporting of unit, disconnect the water
supply, and turn off the fuel supply valve.
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.
1. If 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
unit with a 50% anti–freeze solution. Relieve
pressure. Flush the pressure washer before using
it again to remove the anti–freeze.
Each 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.
NOTE: An anti–freeze flush kit, P/N 802–327, is
available to make flushing easier
.
After first 50
hours of
operation
Change pump break–in oil. Use
SAE 20 or 30 non–detergent oil.
Change gear reducer oil. Use
SAE 90 gear oil.
CAUTION
If water does freeze in the pressure washer, thaw
it in a warm room before trying to start it. DO NOT
pour hot water on or into the pump; it may crack
the ceramic plungers!
Each 100 hours Clean or replace paper air
of operation
or 3 months
cleaner cartridge. Tap gently to
remove dirt. Change engine oil.
Use SAE 30 or 10W–30
detergent oil.
2. After each use, wipe all surfaces of the pressure
washer with a clean, damp cloth.
Each 500 hours Change pump oil. Use SAE 20 or
3. Perform the appropriate maintenance. See
maintenance chart.
of operation
30 non–detergent oil. Change
gear reducer oil. Use SAE 90
gear oil.
or 6 months
8
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TROUBLESHOOTING CHART
WARNING
To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin or injury from
moving parts, always follow the Pressure Relief Procedure Warning before proceeding.
CAUSE
SOLUTION
PROBLEM
Engine will not start or No gasoline in fuel tank or carburetor
.
Fill the tank with gasoline, open fuel shut off valve.
Check fuel line and carburetor.
is hard to start
Low oil (on units with low oil sensor).
Start/Stop switch in Stop position.
Add to proper level.
Move switch to start position.
W
ater in gasoline or old fuel.
Choked improperly. Flooded engine.
Dirty air cleaner filter
Drain fuel tank and carburetor. Use new fuel and dry
spark plug.
Open choke and crank engine several times to clear
out gas.
.
Remove and clean.
Spark plug dirty, wrong gap or wrong type.
Spray gun closed.
Clean, adjust the gap or replace.
Trigger spray gun.
Engine misses or
lacks power
Partially plugged air cleaner filter
Spark plug dirty, wrong gap or wrong type.
orn or wrong size tip.
Inlet filter clogged.
orn packings, abrasives in water or
natural wear
Inadequate water supply
.
Remove and clean.
Clean, adjust the gap or replace.
Low pressure and/or
pump runs rough
W
Replace with tip of proper size.
Clean. Check more frequently
.
W
Check filter. Replace packings. See PUMP SERVICE.
.
.
Check water flow rate to pump.
Fouled or dirty inlet or discharge valves.
Even a small particle can cause the valve
to stick.
Clean inlet and discharge valve assemblies. Check
filter.
Restricted inlet.
Check garden hose, may be collapsed or kinked.
Replace worn valves.
W
orn inlet or discharge valves.
Leaking high pressure hose.
orn packings.
Replace high pressure hose.
W
ater leakage from
W
Install new packings. See PUMP SERVICE.
under pump manifold
Water in pump
Humid air condensing inside crankcase.
orn packings.
Oil seals leaking.
Change oil as specified in MAINTENANCE.
Install new packings. See PUMP SERVICE.
Install new oil seals. See PUMP SERVICE.
W
Frequent or premature Scored, damaged or worn plungers.
failure of the packings
Install new plungers. See PUMP SERVICE.
Abrasive material in the fluid being pumped. Install proper filtration on pump inlet plumbing.
Inlet water temperature too high.
Overpressurizing pump.
Check water temperature; may not exceed 160_F.
Do not modify any factory–set adjustments. See
EQUIPMENT MISUSE HAZARD.
Excessive pressure due to partially plugged Clean or replace tip. See Installing and Changing
or damaged tip.
Spray Tips.
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 the
Foreign particles in the inlet or discharge
Clean or replace valves. See PUMP SERVICE.
inlet and low pressure valve or worn inlet and/or discharge valves.
on the discharge side
Oil leakage between
the gear reducer cover
and case
W
W
W
orn gasket.
Replace the gasket. See SERVICE SECTION.
Oil leakage between
the gear reducer cover
and the pump
orn oil seals and/or o-ring.
orn oil seal.
Replace oil seals and/or o-ring. See SERVICE
SECTION.
Oil leakage between
the gear reducer case
and the engine
Replace oil seal. See SERVICE SECTION.
9
308–529
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PARTS DRAWING
800–638 & 800–690 Hydra–Cleanr 2540 Pressure Washer
4
3
3
4
7
7
43
65
8
8
38
45
10
10
48
64
51
46
50
13
47
49
11
10
47
52
54
62
60
51
61
53
56
57
39
40
41
55
59
35
12
58
36
42
44
37
17
19
1
11
10
34
9
6
31
5
29
2
33
10
18
24
20
20
47
15
16
21
10
11
3
0
26
25
13
32
26
15
16
23
14
32
28
26
22
63
26
27
10 308–529
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PARTS LIST
800–638 & 800–690 Hydra–Cleanr 2540 Pressure Washer
REF PART
NO. NO.
REF PART
NO. NO.
DESCRIPTION
QTY
DESCRIPTION
QTY
1
800–392 GUN & WAND ASSEMBL
Y
32
33
34
35
101–566 NUT, Lock 3/8–16
800–661 CHASSIS
3
1
4
(incl. 2, 5, 9, 15, 17, 47)
803–350 GUN, Spray (see Instruction
Manual 308–511)
181–867 LABEL, Warning, ventilation
802–363 LABEL, Caution
801–134 WAND, 32”
179–885 LABEL, Warning, chassis
803–900 ENGINE, 9 hp, Honda OHV
(used on 800–638 only)
1
2
801–012 GROMMET, Rubber
1
1
1
1
1
800–131 TIP ASSEMBLY, 0005
3
4
5
6
7
(incl. 39, 40)
800–137 TIP ASSEMBL
(incl. 39, 41)
1
36
Y
, 1505
1
1
1
4
1
1
37
38
39
40
41
42
402–278 PLUG, Plastic
803–083 LABEL, Keep From Freezing
801–090 COUPLER, Male 1/4
801–640 TIP, Spray 0005
1
803–901 ENGINE, 9 hp, Briggs &
Stratton OHV (used on
801–667 TIP, Spray 1505
800–128 TIP ASSEMBLY, 2505
800–690 only)
1
8
802–127 SCREW, Cap, hex hd.
5/16–18 x 1-3/4
(incl. 39, 55)
1
1
4
1
18
10
1
2
1
2
2
1
43
44
803–739 PUMP & GEAR REDUCER
ASSEMBLY (incl. 64, 65)
800–129 TIP ASSEMBLY, 4005
9
10
11
12
13
14
15
16
17
18
801–674 SLEEVE, 28”
100–527 WASHER, Flat 5/16
111–040 NUT, Lock 5/16–18
801–539 BUMPER
801–568 COUPLER, Male 3/8
802–579 HOSE, High Pressure, 3/8 x 50’
801–569 COUPLER, Female 3/8 (incl. 16)
156–082 O–RING, Female Coupler 3/8
801–009 COUPLER, Female 1/4 (incl. 19)
801–941 SCREW, Cap, hex hd.
5/16–18 x 1
(incl. 39, 59)
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
801–907 WASHER, Flat
801–905 ADAPTER, 3/8 G x 3/8 NPT
156–849 NIPPLE, Hex 3/8
801–709 PLUG, Square
800–655 UNLOADER, 2500 psi
802–627 NIPPLE, Hex 3/8 x 1/4
803–869 HOSE, Bypass
801–523 NIPPLE, 1/2 x 2
801–622 CROSS, 1/2
800–115 VALVE, Thermal Relief
801–614 TIP, Spray 2505
801–111 NUT, Garden Hose
801–110 ADAPTER, Garden Hose
804–051 FILTER/STRAINER
801–615 TIP, Spray 4005
4
1
4
2
2
2
1
19
20
21
22
23
24
25
154–594 O–RING, Female Coupler 1/4
154–636 WASHER, Flat 5/8
101–545 PIN, Cotter 1/8 x 1-1/2
801–504 BUMPER, Rubber
803–740 WHEEL & TIRE ASSEMBL
803–741 AXLE
801–546 SCREW, Cap, hex hd.
3/8–16 x 1-1/4
Y
4
10
801–367 BUMPER, Rubber
802–140 BRACKET, Support
804–073 ADAPTER, 1/2
26
27
100–023 WASHER, Flat 3/8
801–819 SCREW, Cap, hex hd.
3/8–16 x 3
1
1
1
800–377 HOSE ASSEMBL
Y, w/Couplers
28
29
30
801–858 BRACKET, Front Leg
803–925 HANDLE
800–641 FRONT LEG ASSEMBL
(incl. 13, 14, 15)
1
64
65
803–737 PUMP ASSEMBLY (see page 16) 1
802–143 GEAR REDUCER ASSEMBL
Y
Y
(incl. 22, 26, 27, 28, 32)
1
1
(see page 15)
1
31
803–301 LABEL, Model 2540
11
308–529
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PARTS DRAWING
800–639 Hydra–Cleanr 3040 Pressure Washer
4
3
7
43
61
8
38
10
48
51
47
50
60
52
13
51
53
22
10
56
55
57
49
58
37
46
54
12
31
39
40
41
45
35
36
42
44
33
22
11
17
10
1
6
9
34
62
10
5
18
2
24
20
20
21
10
22
47
15
16
26
29
25
23
30
13
32
26
15
16
14
32
28
26
19
59
26
27
12 308–529
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PARTS LIST
800–639 Hydra–Cleanr 3040 Pressure Washer
REF PART
REF PART
NO. NO.
NO. NO.
DESCRIPTION
QTY
DESCRIPTION
QTY
1
4
1
2
800–392 GUN & WAND ASSEMBL
Y
33
34
35
800–661 CHASSIS
(incl. 2, 5, 9, 11, 15, 47)
803–350 GUN, Spray (see Instruction
Manual 308–511)
1
801–012 GROMMET, Rubber
800–314 TIP ASSEMBL , 00045
Y
1
1
1
1
1
1
(incl. 31, 39)
800–315 TIP ASSEMBL
(incl. 31, 40)
1
3
4
5
6
7
8
181–867 LABEL, Warning, ventilation
802–363 LABEL, Caution
36
Y
, 15045
1
1
1
1
1
1
801–134 WAND, 32”
37
38
39
40
41
42
402–278 PLUG, Plastic
179–885 LABEL, Warning, chassis
803–158 ENGINE, 11 hp, Honda OHV
802–127 SCREW, Cap, hex hd.
5/16–18 x 1-3/4
801–674 SLEEVE, 28”
100–527 WASHER, Flat 5/16
803–083 LABEL, Keep From Freezing
803–106 TIP, Spray 00045
803–107 TIP, Spray 15045
4
1
18
1
1
2
1
2
1
1
803–108 TIP, Spray 25045
9
10
11
12
13
14
15
16
17
18
800–316 TIP ASSEMBLY, 25045
(incl. 31, 41)
1
1
801–009 COUPLER, Female 1/4 (incl. 17)
801–539 BUMPER
43
44
803–739 PUMP & GEAR REDUCER
ASSEMBLY (incl. 60, 61)
800–317 TIP ASSEMBL
801–568 COUPLER, Male 3/8
802–579 HOSE, High Pressure, 3/8 x 50’
801–569 COUPLER, Female 3/8 (incl. 16)
156–082 O–RING, Female Coupler 3/8
154–594 O–RING, Female Coupler 1/4
801–941 SCREW, Cap, hex hd.
5/16–18 x1
Y
, 40045
(incl. 31, 45)
1
1
1
2
1
1
45
46
47
48
49
50
803–109 TIP, Spray 40045
804–073 ADAPTER, 1/2
156–849 NIPPLE, Hex 3/8
800–324 UNLOADER, 3000 psi
802–140 BRACKET, Support
803–142 NIPPLE, Hex
4
2
4
2
10
2
1
19
20
21
22
23
24
25
801–504 BUMPER, Rubber
154–636 WASHER, Flat 5/8
1/2 NPSM x 3/8 NPT
1
1
1
1
1
2
1
1
1
101–545 PIN, Cotter 1/8 x 1-1/2
51
52
53
54
55
56
57
58
59
803–141 HOSE, Bypass
801–523 NIPPLE, 1/2 x 2
801–622 CROSS, 1/2
800–115 VALVE, Thermal Relief
801–367 BUMPER, Rubber
801–111 NUT, Garden Hose
801–110 ADAPTER, Garden Hose
804–051 FILTER/STRAINER
800–377 HOSE ASSEMBL
(incl. 13, 14, 15)
803–737 PUMP ASSEMBLY (see page 16) 1
802–143 GEAR REDUCER ASSEMBLY
111–040 NUT, Lock 5/16–18
803–740 WHEEL & TIRE ASSEMBL
Y
803–741 AXLE
801–546 SCREW, Cap, hex hd.
3/8–16 x 1-1/4
4
10
26
27
100–023 WASHER, Flat 3/8
801–819 SCREW, Cap, hex hd.
3/8–16 x 3
1
1
1
Y, w/Couplers
28
29
30
801–858 BRACKET, Front Leg
803–925 HANDLE
1
60
61
800–641 FRONT LEG ASSEMBL
Y
(incl. 19, 26, 27, 28, 32)
801–090 COUPLER, Male 1/4
101–566 NUT, Lock, 3/8–16
1
4
5
(see page 15)
1
1
31
32
62
803–161 LABEL, Model 3040
13
308–529
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GEAR REDUCER SERVICE
WARNING
To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin or injury
from moving parts, always follow the Pressure Relief Procedure Warning on page 2 before proceeding.
Replacing the Gasket (9)
Replacing the Oil Seal (14)
NOTE: To maintain a good seal, the gasket must be
replaced whenever the gear reducer is
disassembled.
NOTE: The oil seal MUST be replaced with a new
one if removed.
1. Follow steps 1 and 3 under Replacing the Gasket.
2. Remove the snap ring (6) from the gear case, using
1. Remove the four bolts, lockwashers and washers.
Pull the pump and gear reducer assembly of f the
engine.
a
snap ring pliers. Pull the gear and bearing.
3. Push the seal from the inside to the outside of the
gear case by placing screwdriver against the seal
2. Drain the gear reducer oil by placing a container
under it and removing the drain plug with a 22 mm
wrench. Replace the o–ring (15) if damaged.
and lightly tapping it with hammer
.
4. Wipe the inner surface of the case clean, then
lightly coat it with grease. Place the oil seal into the
gear case. Use a socket, placed against the
surface of the seal, to push the seal into the case
until its top surface is past the ridge in the bore.
3. Remove the nine screws with a 6 mm wrench and
pull the gear case off the gear cover
.
4. Remove the old gasket (9). Clean the gear cover
and case surface. Lightly coat the new gasket with
grease and install it in on the gear case.
5. Place the gear and bearing back into the gear case
and install the snap ring (6).
5. Follow steps 5 through 7 under Assembling the
Gear Reducer if this is all the service required.
6. Follow steps 4 through 7 under Assembling the
Gear Reducer if this is all the service required.
Replacing the Oil Seals (21)
1. Follow steps 1 through 3 under Replacing the
Gasket.
Assembling the Gear Reducer
1. Grease the o–ring and make sure it’ s properly
placed on the gear cover
.
2. Loosen the setscrew, using a 4 mm wrench, and
pull the gear off the pump with a gear puller
.
2. Place the four oil seals and screws in the gear
cover. Place the o–ring on the screw to hold it in the
cover.
3. Using a 6 mm wrench, remove the four screws. Be
sure to keep them separate from the other nine
screws removed previously
.
3. Apply low strength Loctite r (blue) on the screw
threads, align the screws with the holes in the
pump, and tighten the screws oppositely and
evenly.
4. Remove the four oil seals and replace them.
5. Follow steps 2 through 7 under Assembling the
Gear Reducer if this is all the service required.
4. Grease the pump shaft. Align the gear ’s slot with
the key on the pump shaft and slide the gear onto
the shaft, up to the pump’ s shoulder. Apply low
strength Loctite r on the setscrew threads and
tighten the setscrew to lock the gear on the shaft.
Replacing the O–Ring (1)
1. Follow the instructions under Replacing the Gasket
and Replacing the Oil Seals to disassemble the
gear reducer.
5. Make sure the gasket is in place (refer to step 4
under Replacing the Gasket). Install the gear cover
on the case, aligning the holes, and secure it with
the nine screws and lockwashers. T ighten the
screws evenly in a crisscross pattern.
2. Pull the gear cover of f the pump and replace the
o–ring (1).
3. Follow instructions under Assembling the Gear
Reducer if this is all the service required.
6. Grease the engine shaft. Align the gear
’s slot with
the key on the engine shaft and slide the gear
reducer onto the shaft, up to the engine’s shoulder
.
7. Secure the gear reducer to the engine with the four
bolts, lockwashers and washers.
14 308–529
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PARTS DRAWING
802–143 Gear Reducer
1
2
3
4
10
21
20
5
11
6
12
7
13
14
8
9
17
19
12
18
15
16
PARTS LIST
802–143 Gear Reducer
REF PART
NO. NO.
DESCRIPTION
QTY
1
1
2
802–332 O–RING
802–333 COVER, Mounting
802–334 SCREW, Set
802–335 GEAR, Pump
802–336 GEAR, Engine
802–337 RING, Snap
802–338 BEARING
1
3
1
4
1
5
1
6
1
7
1
8
802–339 RING, Snap
802–340 GASKET
801–475 DIPSTICK
1
9
1
10
11
12
13
14
15
16
17
18
19
20
21
1
802–341 CASE, Mounting
100–527 WASHER, Lock
802–342 SCREW
1
13
9
802–343 SEAL, Oil
1
802–344 O–RING
1
801–484 CAP, G 3/8 BSP
802–345 GAUGE, Sight
100–214 WASHER, Flat
802–331 BOLT, 5/16–24 x 1”
802–346 SCREW
1
1
4
4
4
802–347 SEAL, Oil
4
15
308–529
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PARTS DRAWING
803–737 Pump Assembly
10
9
20
19
18
8
12
7
13
11
6
14
5
45
46
54
4
1
47
50
49
44
45
17
3
16
2
42
43
44
53
11
9
52
10
51
40
15
41
14
39
12
29
28
21
23
32
33
26
22
24
30
25
31
34
27
35
36
31
37
38
16 308–529
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PARTS LIST
803–737 Pump Assembly
REF PART
NO. NO.
REF PART
NO. NO.
DESCRIPTION
QTY
DESCRIPTION
QTY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
801–467 MANIFOLD, 2000 psi
801–468 SCREW, Cap, hex hd.
801–469 WASHER, Lock
1
8
8
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
49
50
51
52
53
54
803–293 COVER, Crankcase
802–345 GAUGE, Sight
802–793 PLUG, Oil Drain
1
1
1
KIT 1
KIT 1
KIT 1
KIT 1
KIT 1
KIT 4
KIT 4
KIT 1
O–RING
KIT 6
O–RING
SEAT, Valve
PLATE, Valve
SPRING
GUIDE, Valve
O–RING
803–294 SCREW, Cap, socket hd
801–652 WASHER, Lock
801–660 WASHER, Flinger
6
6
3
3
801–490 PLUNGER, Ceramic
KIT 6
KIT 6
KIT 6
RING, Backup
WASHER
SCREW, Piston
CAP
VALVE ASSEMBL
Y
803–283 SCREW, Cap, socket hd.
803–284 COVER, Crankcase
802–500 O–RING, Crankcase Cover
803–285 BEARING, Tapered Roller
8
1
2
2
803–295 COVER, Crankcase
803–296 SHIM
1
2
KIT 3
SEAL, Oil
KIT 28
KIT 28
O–RING
RETAINER, Packing
KIT 2
SEAL, Oil
803–286 BUSHING, Piston
802–895 CRANKCASE
801–475 DIPSTICK
803–144 GASKET, Cover
803–332 CRANKSHAFT
803–288 RING, Retaining
802–794 KEY
1
1
1
1
1
6
1
3
3
3
5
KIT 8,28 PACKING
KIT 28
KIT 28
KIT 28
RING, Head
RETAINER, Packing
RING, Long Life
802–305 SCREW, Cap, socket hd.
802–304 WASHER, Lock
801–482 PLUG, Hex
801–483 WASHER, Flat
801–484 PLUG, Hex
2
2
1
1
1
1
803–289 PIN, Wrist
803–290 GUIDE, Piston
803–291 ROD, Connecting
803–292 SCREW, Cap, socket hd
801–485 WASHER, Flat
Kit Repair Kit
No. Part No.
Ref.
No.
Description
Qty.
1
801–472
Valve
4
5
6
7
8
11
O–RING
6
6
6
6
6
6
SEAT, Valve
PLATE, Valve
SPRING
GUIDE, Valve
VALVE ASSEMBLY
2
3
801–473
Oil Seal Kit
16
SEAL, Oil
SEAL, Oil
3
802–511
Crankshaft
Seal Kit
41
2
4
6
802–306
9
10
O–RING
CAP
6
6
Valve Cap Kit
801–474
Plunger Repair 36
Kit
31
O–RING
RING, Backup
WASHER
3
3
3
3
37
38
SCREW, Piston
8
801–486
Packing Kit
44
PACKING
6
28
801–487
Packing and
Retainer Kit
42
43
44
45
46
47
O–RING
RETAINER, Packing
PACKING
RING, Head
RETAINER, Packing
1
1
2
1
1
1
RING, Long Life
17
308–529
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PUMP SERVICE
Servicing the Plungers
WARNING
To reduce the risk of serious bodily injury
including fluid injection, splashing in the eyes or
on the skin, or injury from moving parts, always
,
NOTE: Plunger repair kit, P/N 801–474 is available to
replace retainers, o–rings, washers and
backup rings for three cylinders.
follow the Pressure Relief Procedure Warning
before proceeding.
1. Loosen the plunger retaining screw five to six turns,
using an M10 wrench. Push the plunger towards
the crankcase to separate the plunger and
NOTE: The following metric wrenches are needed:
M10, M13 and M30. Repair kits are available.
Refer to the individual repair sections and the
pump parts page for more details. For the
best results, use all parts in the kits.
retaining screw
.
2. Remove the screw from the plunger and examine
the o–ring, backup ring and copper bearing/gasket
washer. Replace these parts, if necessary, using kit
801–474.
NOTE: There are two dif ferent tool kits to aid in
servicing the pump. P/N 800–298 is used to
ease installation of packings. P/N 800–271
includes the items in 800–298 and tools to aid
in the removal of packing retainers.
3. Remove the plunger and flinger from the plunger
shaft. Clean, examine and replace parts as
necessary.
4. Inspect the plunger shaft for oil leakage from the
crankcase. If leaking is obvious, replace the oil
seals. Otherwise, DO NOT remove these seals as
they cannot be reused. An oil seal kit is available to
replace the seals.
Valves
NOTE: For a set of six valves, order P/N 801–472.
1. Remove the hex plug from the manifold using an
M30 wrench.
5. Lightly grease the flinger and oil seal, if it is being
replaced and replace them on the plunger shaft.
2. Examine the o–ring under the hex plug and replace
it if it is cut or distorted.
Then install the plunger
.
6. Lightly grease the retaining screw and the outer
end of the plunger. Place the washer, o–ring and
backup ring around the screw and install the screw
through the plunger. Torque to 14.4 ft–lb (19.5 Nm).
3. Remove the valve assembly from the cavity; the
assembly may come apart.
4. Install the new valve. Install the o–ring and hex
plug; torque to 75 ft–lb (103 Nm).
NOTE: If you plan to replace the packings, refer to
Servicing the V–Packings.
NOTE: Retorque the plug after 5 hours of operation.
7. Lubricate the outside of each plunger . Slide the
manifold onto the crankcase, being careful not to
damage the seals.
Pumping Section
1. Remove the eight capscrews and lockwashers
from the manifold using an M13 wrench.
8. Install the capscrews and washers finger–tight.
Torque the screws to 21.7 ft–lb (29 Nm) following
the tightening pattern (Figure 4). Uneven tightening
may cause the manifold to bind or jam.
2. Carefully separate the manifold from the
crankcase.
NOTE: It may be necessary to tap the manifold lightly
with a soft mallet to loosen.
CAUTION
5
8
1
3
4
2
7
6
Keep the manifold properly aligned with the
ceramic plungers when removing to avoid
damage to the plunger or seals.
3. Carefully examine each plunger for any scoring or
cracking and replace as necessary
.
Figure 4
18 308–529
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5. Thoroughly clean the packing cavities and examine
for debris and damage.
Servicing the V–Packings
NOTE: There are two types of packing kits: one is
packings only , the other includes the
packings, rings and retainers.
6. Lightly grease the packing cavities and then
replace the packings in the following order: head
ring, v–packing, intermediate ring, head ring,
v–packing and packing retainer with the o–ring
installed in the retainer groove.
1. Remove the manifold as outlined in the Pumping
Section.
2. Carefully pull the packing retainer from the
manifold. Examine the o–ring and replace it if it is
cut or damaged.
CAUTION
Install the parts in the proper order and facing the
correct direction. Improperly installed parts will
cause a malfunction.
3. Remove the v–packing and head ring. Pull out the
intermediate retainer ring. Remove the second
v–packing and second head ring.
7. Reassemble the manifold as instructed in
Servicing the Plungers.
4. Inspect all parts and replace as necessary
.
ACCESSORIES
(Must be purchased separately)
DOWNSTREAM CHEMICAL INJECTOR KIT
800–117
For injecting harsh cleaning chemicals downstream
from the pump.
ANTI–FREEZE FLUSH KIT 802–327
For flushing system with 50% anti–freeze solution prior
to transporting or storing pressure washer in below
freezing temperatures.
INLET PRESSURE REGULATOR 800–258
Regulates inlet water pressure to 60 psi (4 bar)
maximum.
UPSTREAM CHEMICAL INJECTOR KIT
800–257
For injecting mild cleaning chemicals upstream into the
pump.
BACKFLOW PREVENTOR 801–133
Prevent back–up of contaminated water into fresh
supply. Install upstream of pump.
TECHNICAL DATA
Model 800–638
Model 800–690
9 hp Briggs & Stratton OHV
5 quarts (4.8 liters)
Model 800–639
Engine (air–cooled, 4 cycle)
Gasoline Tank Capacity
9 hp Honda OHV
6.2 quarts (6 liters)
2500 psi (172 bar)
1
1 hp Honda OHV
6.9 quarts (6.5 liters)
3000 psi (207 bar)
Water Pump Maximum Working
2500 psi (172 bar)
Pressure
W
ater Pump Maximum Flow
4 gpm (15 lpm)
3/4” garden hose (f)
158 lb (70 kg)
4 gpm (15 lpm)
3/4” garden hose (f)
158 lb (70 kg)
4 gpm (15 lpm)
3/4” garden hose (f)
172 lb (78 kg)
Inlet Hose Connection
Weight
Dimensions
Length
36” (914 mm)
21” (533 mm)
23.5” (597 mm)
36” (914 mm)
21” (533 mm)
23” (584 mm)
36” (914 mm)
21” (533 mm)
24” (610 mm)
Width
Height
Maximum Inlet Water Temperature 160_
F
(70_
C)
160_
F
(70_
C)
160_
F
(70_
C)
Wetted Parts
High Pressure Hose
Bypass Hose
Acrylonitrile and Buna–N cover and tube
Synthetic yarn and EPDM
Pressure Washer
(including fittings)
Anodized aluminum, Aluminum or bronze alloys, Brass Copper, Nylon–
PTFE
r
composite, Ceramic, Buna–N, Cotton phenolic, 303, 304, and 316 Stainless steel,
Polymide–12 thermoplastic,
r, Carbon steel, Zinc with or without yellow
PTFE
chromate plate
is a registered trademark of the DuPont Company
.
PTFE
19
308–529
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THE GRACO WARRANTY
WARRANTY AND DISCLAIMERS
Graco warrants all equipment manufactured by it and bearing its name to be free from defects in material and
workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. As
purchaser’s sole remedy for breach of this warranty, Graco will, for a period of twenty four months from date
of sale, repair or replace any part of the equipment proven defective. This warranty applies only when the
equipment is installed, operated and maintained in accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for, any malfunction, damage or wear caused by
faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence,
accident, tampering, or substitution of non–Graco component parts. Nor shall Graco be liable for
malfunction, damage or wear caused by the incompatibility with Graco equipment of structures,
accessories, equipment or materials not supplied by Graco, or the improper design, manufacture,
installation, operation or maintenance of structures, accessories, equipment or materials not supplied by
Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective for
examination by Graco to verify the claimed defect. If the claimed defect is verified, Graco will repair or
replace free of charge any defective parts. The equipment will be returned to the original purchaser
transportation prepaid. If inspection of the equipment does not disclose any defect in material or
workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts,
labor and transportation.
DISCLAIMERS AND LIMITATIONS
THE TERMS OF THIS W ARRANTY CONSTITUTE THE PURCHASER’S SOLE AND EXCLUSIVE
REMEDY AND ARE IN LIEU OF ANY OTHER WARRANTIES (EXPRESS OR IMPLIED), INCLUDING
WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE,
AND OF ANY NON–CONTRACTUAL LIABILITIES, INCLUDING PRODUCT LIABILITIES, BASED ON
NEGLIGENCE OR STRICT LIABILITY . EVERY FORM OF LIABILITY FOR DIRECT , SPECIAL OR
CONSEQUENTIAL DAMAGES OR LOSS IS EXPRESSL Y EXCLUDED AND DENIED. IN NO CASE
SHALL GRACO’S LIABILITY EXCEED THE AMOUNT OF THE PURCHASE PRICE. ANY ACTION FOR
BREACH OF WARRANTY MUST BE BROUGHT WITHIN THREE (3) YEARS OF THE DATE OF SALE.
EQUIPMENT NOT COVERED BY GRACO WARRANTY
GRACO MAKES NO W ARRANTY, AND DISCLAIMS ALL IMPLIED W
ARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A P ARTICULAR PURPOSE, WITH RESPECT T
O
ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT MANUFACTURED
BY GRACO. These items sold, but not manufactured by Graco (such as electric motor, switches, hose, etc.)
are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable
assistance in making any claim for breach of these warranties.
IMPORTANT PHONE NUMBERS
TO PLACE AN ORDER , contact your Graco distributor, or call this number to identify the
distributor closest to you: 1–800–328–0211 Toll Free
FOR TECHNICAL ASSIST ANCE, service repair information or assistance regarding the
application of Graco equipment: 1–800–543–0339 Toll Free
Factory Branches: Atlanta, Chicago, Dallas, Detroit, Los Angeles, West Caldwell (N.J.)
Subsidiary and Affiliate Companies: Canada; England; Switzerland; France; Germany; Hong Kong; Japan; Korea
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
PRINTED IN U.S.A. 308–529 1/91
20 308–529
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