Graco Inc. 801-643 Pressure Washer User Manual
Contents
1. Do not let anyone else touch the spray valve while you are cleaning nozzles Be sure the slip ring is pushed forward to lock the nozzle in place before triggering the spray gun Shutdown and Care Of Unit When unit is not in use turn off water supply 4 801 643 When shutting down for the day or weekend shut off unit shut off water supply valve and trigger gun to release pressure Wipe off the unit with a damp rag CAUTION Shut off cleaning unit when not actually spraying for longer pump life The pump will overheat if left running for over 10 minutes without spraying Check the filter screen in the water inlet connection as often as necessary at least daily Do not operate the unit with the inlet and filter screen removed DO NOT try to adjust the unloader valve or change the engine speed Changing these settings may cause exces sive pressure intermittent untoader operation wasted fuel and increased wear on parts and will void the warranty PUMP MUST NOT BE RUN DRY and must be drained of water prior to exposure to freezing temperatures Use and store the unit where it will not be subjected to freezing temperatures If water does freeze in the unit thaw before trying to start A 50 anti freeze solution may be pumped prior to cold weather storage Use only spray tips that are matched to the unit to avoid excessive cycling and wear of the unloader valve See ACCESSORIES CAUTION2. and dry spark piug Choked improperly Flooded Open choke and crank engine several times to engine clear out the gas Dirty carburetor air filter Remove and clean Spark plug dirty or improper Clean adjust the gap or replace gap Spray gun closed Trigger spray gun Remove and clean Engine Misses Or Lacks Clean adjust the gap or replace Partially plugged air filter Power 3 Spark plug dirty wrong gap or wrong type Incorrect ignition timing Time engine Worn nozzle Replace with nozzle of proper size Belt slippage Tighten or replace use correct belts and replace both at same time Air leak in inlet plumbing Disassemble resea and reassemble Relief valve stuck partially Clean and adjust relief valve check for worn plugged or improperly and dirty valve seats Kit available adjusted valve seat worn i Inlet suction strainer clogged or Clean Use adequate size Check more improper size frequently Worn packing Abrasives in install proper filter Check flow available to pumped fluid or severe cavita pump tion Inadequate water supply Fouled or dirty inlet or discharge Clean inlet and discharge valve assemblies valves Worn inlet or discharge valves Leaky discharge hose Low Pressure Replace worn valves valve seats and or discharge hose Proper size inlet plumbing check for air tight seal Clean
3. ae hee R ERA TOCO SER Pump Assembly 800 068 A REF PART REF PART NO NO DESCRIPTION QTY NO NO DESCRIPTION aTY 1 801 468 SCREW M8 x 70 mm 8 23 801 483 WASHER 1 2 801 469 WASHER 8 24 801 485 WASHER 1 3 801 852 VALVE UNIT 6 25 801 107 REDUCING NIPPLE 1 2 x 3 8 1 4 801 470 O RING 6 26 801 523 NIPPLE 1 2 NPT x 2 1 5 801 648 HEX PLUG M24 x 2x 16 6 27 801 106 TEE 1 2 NPT 1 6 801 647 MANIFOLD 1 28 801 110 HOSE ADAPTER 1 7 801 479 HEAD RING 6 29 801 111 HOSE CONN NUT 1 8 801 478 PACKING 6 30 801 112 INLET SCREEN 1 9 801 481 LONG LIFE RING 3 31 801 597 HOSE low pressure 1 10 801 476 O RING 3 32 800 122 UNLOADER ASSEMBLY see 11 801 777 OIL SEAL 3 parts drawing list page 7 1 12 801 493 PLUNGER RETAINING SCREW 3 33 801 568 QUICK COUPLE male 3 8 1 13 801 492 BEARING GASKET WASHER 3 34 801 526 TENSIONER belt 2 14 801 475 OIL DIPSTICK 1 35 801 913 NIPPLE 3 4 NPT x G 3 8 BSP 1 15 801 489 FLINGER 3 36 801 899 PUMP 1 16 801 490 PLUNGER 3 37 801 910 PLUG plastic 1 17 801 491 BACK UP RING 3 38 801 907 WASHER aluminum 1 18 801 488 O RING 3 39 801 143 TAG caution 1 19 801 477 PACKING RETAINER 3 40 801 524 LABEL pump 4 a PIDEN Cae eye an 7 RING 3 Order parts by name and series letter of the assembly for 1 which you are ordering 801 643 9 22 801 482 CAP 1 2 NPT PARTS DRAWING 2225 Gun Assembly 800 130 SERVICE es Gun Cartridge Replacement 1 Press access pin 12 from gun handle and remove access plate 14 by sliding
4. out foreign material replace worn valves Pump runs extremely rough Restricted inlet or air entering pressure low the inlet plumbing inlet restrictions and or air leaks Stuck inlet or discharge valve Leaking H P seals Replace seals Water leakage from under Worn packing Install new packing gs the manifold May be caused by humid air Change oil at 3 month or 500 Hour intervals using condensing into water inside the Crankcase Oil other approved oil every month or crankcase 200 hours P N 801 144 Frequent or premature failure Scored plungers Replace plungers of the packing Over pressure to inlet manifold Reduce inlet pressure Damaged or worn plungers Replace plungers Abrasive material in the fluid Install proper filtration on pump inlet plumbing being pumped Excessive pressure and or temperature of fluid being pumped Over pressure of pumps Running pump dry Water in pump crankcase Check pressures and fluid inlet temperature be sure they are within specified range Reduce pressure Do not run pump without water Check for smooth lap surfaces on inlet and discharge valve seats Discharge valve seats and intet valve seats may be lapped ona very fine oil stone Foreign particles in the inlet or discharge valve or worn inlet and or discharge valves Strong surging at the inlet and low pressure on th
5. plate backwards Remove cartridge 5 from housing 6 by using a 19 mm socket wrench 2 Check inside housing to be sure all o rings came out when cartridge was removed if o ring can be seen inside the housing remove it being careful not to damage internal threads in housing 3 Throw away old cartridge and install new cartridge using a small amount of pipe sealant on threads Be sure to tighten cartridge firmly against housing 4 Slide access plate into place and install access pin 10 801 643 K 15 NOTE Hose Quick Couplers 16 amp Spray Tips not included with Gun Assembly See Pressure Washer Assembly Parts Drawing List page 6 7 PARTS LIST i2 Gun Assembly 800 130 REF PART NO NO DESCRIPTION QTy 1 801 134 TUBE 32 1 801 674 GRIP 4 3 801 009 COUPLER female quick disconnect 1 4 801 638 SPRAY GUN replaceable parts include items 5 18 1 5 801 639 CARTRIDGE 1 6 801 671 HOUSING 1 7 801 670 HEX PLUG 1 8 801 256 TRIGGER PIN 1 9 801 424 TRIGGER 1 10 801 672 OUTLET 1 11 801 673 PIN COVER 2 12 801 428 ACCESS PIN 1 13 801 419 HANDLE 1 14 801 427 ACCESS PLATE 1 15 801 420 TUBE 1 16 801 423 INLET FITTING 1 17 801 202 O RING quick couple Order parts by name and Series letter of the assembly for which you are ordering Recommended tool box spare parts ACCESSORIES Must be purchased separately 2222 CHEMICAL INJECTOR KIT 800 117 For injecting har
6. tampering 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 It inspection of the equipment does not disclose any defect in workmanshie or material repairs will be made at a reasonable charge and return transportation will be charged THIS LIMITED WARRANTY IS EXCLUSIVE AND IS INLIEU 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 En SPECIAL OR CONSEQUENTIAL DAMAGES OR LOSS IS EXPRESSLY EXCLUDED AND EQUIPMENT NOT COVERED BY GRACO WARRANTY Accessories or components of equipment sold by Graco that are not manufactured by Graco such as electric motors switches hose etc are subject to the warranty if any of their manufacturer Graco will provide purchaser with reasonable assistance in making such claims Factory Branches Atlanta Dallas Detroit Los Angeles West Cafdwell N J Subsidiary and Affiliate Companies Canada Engiand Switzerland France Germany Hong Kong Japan GRACO INC P O BOX 1441 MINNEAPOLIS MN 55440 1444 PRINTED IN U S
7. the unit and trigger the gun to release pressure Be sure that all accessory items and system components will withstand the pressure developed NEVER exceed the pressure rating of any component in system NEVER alter or modify equipment your personal safety as well as the function of the equipment is at stake Maximum working pressure 3400 PSI 234 bar Before each use check hose for weak worn or damaged conditions caused by traffic sharp corners pinching or kinking Tighten al fluid connections securely before each use Replace any damaged hose Do not use chemicals or agents which are not compatible with Buna N and PVC or neoprene cover of hose Do not leave a pressurized unit unattended Shut off the unit and release pressure before leaving FIRE Do not spray flammable liquids Do not operate the engine where combustible fumes or dust may be present GAS ENGINE PRECAUTIONS S222 ae NEVER fill fuel tank while engine is running or hot Avoid the possibility of spilled fuel causing a fire Always refuel slowly to avoid spillage NEVER operate engine ina closed building unless the exhaust is piped outside The exhaust contains carbon monoxide a poisonous odorless and invisible gas which if breathed may cause Serious illness or possibly death NEVER make adjustments on machinery while it is connected to the engine first remove the ignition cable from the spark plug Turning over the machinery
8. wrench Push plunger towards crankcase This will separate plunger and retaining screw 2 Remove retaining screw from plunger and examine o ring 18 back up ring 17 and copper bearing gasket washer 13 Replace if necessary using plunger repair kit P N 801 474 3 Remove plunger from plunger rod and remove copper flinger 15 Clean or replace if necessary 4 Lightly grease flinger and replace it on plunger rod 5 Replace plunger 6 Lightly grease retaining screw assembly to avoid cutting o ring Lightly grease outer end of plunger 7 Install retaining screw assembly into plunger and torque to 14 4 ft Ibs 2 K m 8 801 643 8 Lubricate each plunger and carefully slide manifold onto crankcase 9 Replace the eight capscrews and snug them up Torque to 21 7 ft lbs 3 K m NOTE The eight capscrews must be torqued evenly to apply equal pressure on the manifold so that it seats properly and doesn t bind or jam This is best done by torquing boits closest to the center of the manifold first and then working out from those bolts Servicing V Packings NOTE Use packing repair kit P N 801 486 1 After removing the eight capscrews and the manifold carefully puil packing retainer 19 from the manifold Examine o ring 10 and replace if necessary i 2 Remove low pressure packing 8 and head ring 7 3 Puil intermediate retainer ring 20 from manifold Remove long life ring 9 high p
9. 8 14 801 069 15 801 070 16 801 071 17 801 939 DESCRIPTION CAGE valve O RING SPRING BALL SEAT O RING UNLOADER SUB ASSEMBLY O RING HOUSING CYLINDER O RING PLUG HOUSING VALVE SPRING VALVE SEAT O RING aTY 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 Order parts by name and series letter of the assembly for which you are ordering 801 643 7 SERVICES Pump Refer to Parts Drawing Page 9 NOTE Two sizes of metric wrenches are necessary for servicing the pump M13 and M30 Valves 1 Remove the hex plug 5 from manifold 6 using M30 wrench 2 2 Examine o ring 4 under plug and replace if cuts or distortion exist 3 Remove valve unit and o ring 3 from cavity NOTE Valve unit may come apart during removal 4 Replace valve unit with P N 801 472 5 Replace hex plug and torque to 75 ft Ibs 10 3 K m NOTE Hex piug should be re torqued after 5 hours operation Pumping Section 1 Remove the eight cap screws 1 from the manifold using the M13 wrench 2 Carefully separate the manifold from the crankcase NOTE It may be necessary to tap manifold lightly with mallet to loosen CAUTION Keep manifold properly aligned with ceramic plungers when removing to avoid damage to plungers or seals 3 Carefully examine each plunger 16 for any scoring and replace if necessary Servicing Plungers 1 Loosen plunger retaining screw 12 5 6 turns using M 10
10. A 801 643 4 85 45 10060 REV D
11. Connect the spray hose to the spray gun by inserting the pin at the end of the hose into the quick disconnect coupler on the gun Connect the hose to the fluid outlet in the same way Cleaning Accessories For spraying detergent or other cleaning solution we recommend using a chemical injector kit See Accessories and instruction manual 801 645 for installation and operation For removing rust and old paint we recommend using a water sandblaster See Accessories and instruction manual 801 646 for installation and operation a ENGINE KILL BUTTON FLUID OUTLET FLUID INLET 3 4 GARDEN HOSE THREAD SPRAY GUN Connect To Water Supply CAUTION Before attaching to water supply check local plumbing code regarding cross connection to water supply Do not exceed 160 F 70 C water temperature to pump in a direct supply system Connect a hose with at least a 3 4 in 19 mm ID from your city water supply to the unit s 3 4 in garden hose threaded inlet The supply hose should Not be more than 50 ft 15 m long NOTE For a direct supply system your water f source at the unit must have a flow rate of AT LEAST 5 GPM 19 LITER MIN If your operating conditions are different from above contact our Customer Service Department for assistance 801 643 3 OPERATION amp Startup Before starting be sure to read the safety warnings and setup instructions Check the oil and ga
12. INSTRUCTIONS PARTS LIST 9 01 643 Rev D GRACO This manual contains IMPORTANT WARNINGS and INSTRUCTIONS READ AND RETAIN FOR REFERENCE HYDRA CLEAN 3035 Pressure Washer 3000 psi 207 bar OPERATING PRESSURE 3400 psi 234 bar MAXIMUM WORKING PRESSURE GRACO INC P O Box 1441 MINNEAPOLIS MN 55440 1444 COPYRIGHT 1984 GRACO INC WARNING HIGH PRESSURE SPRAY CAN CAUSE SERIOUS INJURY FOR PROFESSIONAL USE ONLY OBSERVE ALL WARNINGS Read and understand all instruction manuals before operating equipment INJECTION HAZARD S22 Fluids under high pressure from spray or leaks can penetrate the skin and cause extremely serious injury including the need for amputation NEVER point the spray gun at anyone or any part of the body NEVER put hand or fingers over the spray tip NEVER try to stop or deflect leaks With your hand or body ALWAYS have the tip guard in place when spraying MEDICAL TREATMENT 8 If any fluid appears to penetrate your skin get EMERGENCY MEDICAL CARE AT ONCE DO NOT TREAT AS A SIMPLE CUT Teli the doctor exactly what fiuid was injected For treatment instructions have your doctor call the NATIONAL POISON CENTER NETWORK 412 681 6669 AVOID COMPONENT RUPTURE Even after you shut off the gasoline engine there is high pressure in the pump hose and gun until you release it by triggering the gun So before removing the spray tip or servicing the unit always shut off
13. Let a frozen pump thaw in a warm place Don t pour hot water on a frozen pump A sudden temperature change may crack the ceramic plungers Do not pump caustic materials Before extended storage flush the pump with light oil Avoid dragging hose over an abrasive surface such as cement This causes excessive wear and shorter hose life Clean the intake line strainer daily Lubrication and Care Change the engine oil after every 100 hours of opera tion Drain oi with engine warm Engine requires 3 pints 1 4 liters 30W oil See separate instruction manual for maintenance procedures Fill pump crankcase to dot on oil gauge window with 34 oz 1 0 liters of crankcase oil part no 801 144 or equivalent SAE 40 weight hydraulic oi with anti wear and rust inhibitor additives Change initial fill after 50 hour running period Change oil every 3 months or at 500 hour intervals WARNING a VER alter adjustment or modify the unloader valve Altering or adjusting unloader wif not increase performance of unit Service of the unloader must be performed only by qualified service personnel SERVICE ee TROUBLESHOOTING PROBLEM CAUSE SOLUTION Engine Will Not Start No gasoline in fuel tank or Fill the tank with gasoline open fuel shut off Or Hard To Start carburetor valve Check fuel Jine and carburetor Water in gasoline or old fuel Drain fuel tank and carburetor Use new fuel
14. by hand during adjusting or cleaning might start the engine and machinery causing serious injury to the operator NEVER run the engine with governor disconnected or operate at speeds in excess of 3600 RPM load Precaution is the best insurance against an accident When starting the engine maintain a safe distance from moving parts of the equipment _ GENERAL Bee NEVER run the unit with the belt guard removed Keep clear of moving parts when the unit is running Observe detergent manufacturer s safety precautions Avoid getting detergent or other liquids in your eyes Follow the directions on the container regarding contact with eyes nose and skin breathing fumes etc Always wear full goggles to protect your eyes from the spray as well as any debris dislodged by the spray if necessary wear gloves or other protective ciothing If antidotes or treatment are recommended be prepared to use them DON 7 spray toxic chemicals such as insecticide or weed killer 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 in connection with your use of airless spray equipment 2 801 643 INSTALLATION HE SPRAY HOSE Refer to the engine instruction booklet provided with the unit Install Hose and Spray Gun
15. e discharge side 801 643 5 PARTS DRAWING Pressure Washer Assembly 800 065 GUN ASSEMBLY See Parts Dwg List 1 PUMP ASSEMBLY See Parts Dwg List 4 page 9 6 801 643 PARTS LIST Pressure Washer Assembly 800 065 REF PART NO NO 1 800 130 2 801 599 3 801 600 4 800 068 5 9801 283 6 800 067 7 801 506 8 801 003 9 801 603 10 801 141 11 801 129 12 801 543 13 801 131 14 801 022 15 801 941 16 801 942 17 801 531 18 801 546 19 801 559 20 801 015 21 801 023 22 801 363 23 801 025 24 801 024 25 801 499 26 801 020 27 801 548 28 801 571 29 801 004 30 801 911 31 801 135 32 801 376 33 801 568 34 801 569 35 801 541 PARTS DRAWING DESCRIPTION GUN ASSEMBLY see parts drawing list page 10 TIP 0004 MEG 1 4 thd 0 TIP 1504 MEG 1 4 thd 15 PUMP ASSEMBLY see parts drawing list page 9 ENGINE 11 h p CHASSIS WELDMENT BOOT leg BELT drive NIPPLE hex 3 8 x 3 8 NPT LABEL warning LABEL warning DECAL Graco Vangard PLATE serial no SCREW hex 5 16 18 x 1 3 4 SCREW hex 5 16 18 x 1 SCREW hex 5 16 18 x 3 SCREW hex 3 8 16 x 7 SCREW hex 3 8 16 x 1 1 4 SCREW hex M8 x 30 MM WASHER flat 5 16 WASHER flat 1 4 WASHER lock 3 8 WASHER lock 5 16 NUT hex 5 16 18 NUT locking 3 8 16 NUT locking 1 2 13 GROMMET HOSE H P 3 8 x 50 ft PULLEY pump PULLEY engine HUB pulley HUB pulley QUICK COUPLE ma
16. le 3 8 QUICK COUPLE female 3 8 HANDLE Unloader Assembiy 800 122 3000 PSI 207 bar Max wR n ee Naaa OA AO ARABS Y RBS REF PART NO NO gt 36 801 364 37 801 500 38 801 539 39 801 505 40 801 537 41 801 556 42 801 504 43 801 593 44 801 550 45 801 601 46 801 602 47 801 132 48 801 130 49 801 610 50 801 608 51 801 605 52 801 875 53 801 606 54 801 367 55 801 612 56 801 676 57 801 090 58 801 922 59 800 156 60 801 940 61 801 555 62 801 521 63 801 520 64 801 927 65 801 137 66 801 731 DESCRIPTION BELTGUARD COVER BELTGUARD BASE BUMPER FOOT RETAINER WELDMENT leg support AXLE FOOT SPRING 6 WHEEL TIP 2504 MEG 1 4 thd 25 TIP 4004 MEG 1 4 thd 40 RIVET drive LABEL warning BRACKET support PIN rolt SCREW hex 10 24 x 3 74 WASHER lock 10 WASHER flat 3 16 BUMPER WASHER flat 7 16 SPACER beltguard QUICK COUPLE female thd NUT adjusting NUT weldment SCREW hex 5 16 18 x 3 4 LABEL chk oil RAIL STIFFNER WELDMENT RAIL STIFFNER BRACKET LABEL Model 3035 KEY BUMPER ze 3 Newest oe Ba wWRRNP maana OO Order parts by name and series letter of the assembly for which you are ordering Recommended tool box spare parts Unloader Assembly 800 122 PARTS LIST REF PART NO NO 1 801 045 2 801 046 3 801 047 4 801 048 5 801 049 6 801 050 7 800 123 8 801 059 9 801 412 10 801 432 11 801 062 12 801 063 13 801 06
17. ressure packing 8 and head ring 7 4 Inspect all parts and replace if necessary NOTE If just the packings are needed use kit 801 486 If rings or retainers need replacement use kit 801 487 5 Thoroughly clean packing cavity in manifold and examine Lightly grease packing cavity 6 Replace packing assembly in the following order head ring 7 packing 8 long life ring 9 intermediate ring 20 head ring 7 packing 8 packing retainer 19 and o ring 10 CAUTION Carefully study the location of each part and the position of the seals to assure proper reassembly and operation 7 Lubricate each plunger and carefully slide manifold onto crankcase NOTE When replacing the manifold onto plungers extreme caution should be exercised to avoid damage to the seals 8 Replace the eight capscrews in the manifold and tighten as previously described step 9 under servicing plungers rA PARTS DRAWING UES Pump Assembly 800 068 UNLOADER ASSEMBLY See Parts Dwg List 32 page 7 25 33 PACKING amp RETAINER KIT 801 487 Three kits needed for entire pump PLUNGER REPAIR Includes KIT 801 474 REF 7 includes NO ary VALVE UNIT OIL SEALKIT PACKING KIT REF 7 2 KIT 801 472 801 473 801 486 NO ary 7 2 Includes includes Includes 12 3 9 1 REF REF REF 13 3 10 1 NO QTY NO QTY NO QTY 17 3 19 1 3 6 11 3 8 6 18 3 20 1 PARTS LIST amp
18. sh cleaning chemicals downstream from pump BACK FLOW PREVENTOR 801 133 _ Prevent back up of contaminated water into fresh supply Install upstream from pump es a eae WATER SANDBLASTER 800 120 For abrasive cleaning of stubborn dirt and paint Spray tip not included in kit SANDBLASTER SPRAY TIP 801 600 TECHNICAL DATA ENGINE GASOLINE TANK WATER PUMP WETTED PARTS UNIT WEIGHT OVERALL DIMENSION MAX WATER TEMPERATURE INLET HOSE CONNECTION Wisc 4 cycle single cylinder air cooled 11 hp 6 2 quarts 6 liter capacity 3000 PSI 207 bar max pressure 3 5 GPM 13 25 fiter min Stainless Steel Aluminum Phenolic Plastic Ceramic Liners Nitrile Rubber 222 Ib 101 kg Length 44 1118 mm Width 31 787 mm Height 28 711 mm 160 70 C 3 4 garden hose f 801 643 11 THE GRACO WARRANTY Graco Inc warrants ali equipment manufactured by it and bearing its name to be free from defects in material and workmanship under normal use and sefvice This warranty extends to the original purchaser for a period of 12 months from the date of purchase and applies only when the equipment is installed and operated in accordance with written factory recommendations This warranty does not cover damage or wear which in the reasonable judgment of Graco arises from misuse abrasion corrosion negligence accident substitution of non Graco parts faulty installation or
19. soline levels daily Turn on the water supply Trigger the gun to release any back pressure WARNING DO NOT wire or tie the gun trigger into the open or triggered position Set the choke and open the fuel vaive NOTE For easier starting hold the gun trigger open while pulling the rope Put your foot on the frame or wheel to steady the unit when you pull the starter rope Hold the gun in your left hand with the trigger open while starting the engine Grasp the starter rope grip and rapidly pull out the cord two or three feet 1 m Repeat if necessary with the choke opened slightly When the engine starts im mediately release the gun trigger Open the choke gradually CAUTION Never run the cleaning unit dry Costly damage to the pump will result Always be sure water supply is completely turned on before operating Inspect all connections for any leaks Tighten if necessary Cleaning For Hydra Clean technique see the Chemical Injector manual 801 645 For abrasive cleaning see the Water Sandblaster manual 801 646 WARNING Follow these precautions when removing and in stalling nozzles 1 _ Shut off the cleaning unit and trigger the gun to relieve pressure Engage the trigger safety Keep the nozzle and the tube pointed away from you and everyone else Do not put your hand over the tip to push the nozzle into place Grasp it from the side and keep your fingers away from the tip
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