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  4. 551.0
  5. Operator's Manual

Karcher 551.0 Operator's Manual

Summary of 551.0

  • Page 1

    9.800-079.0 operator’s manual to locate your local kärcher commercial pressure washer dealer nearest you, visit www.Karchercommercial.Com r model # order # hds 2.7/25 p cage hds 2.6/30 p cage hds 3.5/30 p cage hds 3.5/30 pe cage hds 3.5/35 pe cage 1.575-555.0 1.575-550.0 1.575-551.0 1.575-552.0 1.57...

  • Page 2: Contents

    Contents 2 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 ...

  • Page 3: Important Safety

    9.800-079.0 • rev. 05/14 3 pressure w asher opera tor’s manu al introduction & important safety information thank you for purchasing this pressure washer. 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 ...

  • Page 4: Important Safety Information

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 4 trigger gun kicks back - hold with both hands warning warning: grip cleaning wand securely with both hands before starting. Failure to do this could result in injury from a whipping wand. 14. Never make adjustments on machine while in o...

  • Page 5: Important Safety Information

    9.800-079.0 • rev. 05/14 5 pressure w asher opera tor’s manu al warning tip over hazard warning risk of injury from falls when using ladder. Warning: be extremely careful when using a ladder, scaffolding or any other relatively unstable location. The cleaning area should have adequate slopes and dra...

  • Page 6: Component Identification

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 6 component identification pressure switch brass soap nozzle nozzle quick coupler spray gun high pressure hose detergent injector quick coupler collar discharge nipple water supply hose (not included) gasoline tank wand coupler variable p...

  • Page 7: Assembly Instructions

    9.800-079.0 • rev. 05/14 7 pressure w asher opera tor’s manu al 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 pr...

  • Page 8: Pressure

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 8 operating instructions step 1: check engine oil level. Oil level should be level with the bottom of the oil filler neck. Be sure the machine is level when checking the oil level. (refer to the engine's operating manual included with mac...

  • Page 9: Operating Instructions

    9.800-079.0 • rev. 05/14 9 pressure w asher opera tor’s manu al safety latch operating instructions step 7: turn the engine to "run" position. Step 8: pull the starter grip. If the engine fails to start after 2 pulls, squeeze the trigger gun to release pressure and repeat step. Return starter gently...

  • Page 10: Thermal Pump Protection

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 10 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: connect detergent injec- tor to discharge nipple...

  • Page 11: Shutting Down and Clean-Up

    9.800-079.0 • rev. 05/14 11 pressure w asher opera tor’s manu al shutting down and clean-up 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 cover...

  • Page 12: Preventative Maintenance

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 12 preventative maintenance 1. Check to see that the water pump is properly lubri- cated. 2. Follow winterizing procedures to prevent freeze damage to the pump and coils. 3. Always neutralize and flush detergent from system after use. 4. ...

  • Page 13: Maintenance

    9.800-079.0 • rev. 05/14 13 pressure w asher opera tor’s manu al fuel: use clean fuel oil that is not contaminated with water and debris. Replace fuel filter and drain tank every 100 hours of operation. Use no. 1 or no. 2 heating oil (astm d306) only. Never use gasoline in your burner tank. Gasoline...

  • Page 14: Maintenance

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 14 as can be obtained, then repeat the above procedure on the air band setting. Fuel pressure adjustment: to adjust fuel pressure, turn the adjusting screw clock- wise to increase, counterclockwise to decrease. Do not exceed 200 psi. Note...

  • Page 15: Troubleshooting

    9.800-079.0 • rev. 05/14 15 pressure w asher tr oub leshooting guide troubleshooting problem possible cause solution low operating pressure water supply is insufficient use larger supply hose; clean filter at water inlet. Spray nozzle is old, worn or incorrect match the nozzle number to the machine ...

  • Page 16: Troubleshooting

    9.800-079.0 • rev. 05/14 pressure w asher tr oub leshooting guide 16 troubleshooting problem possible cause solution burner will not light (continued from previous page) burner nozzle is clogged clean as required. Thermostat has malfunctioned test and replace if needed. Fuel solenoid has malfunction...

  • Page 17: Troubleshooting

    9.800-079.0 • rev. 05/14 17 pressure w asher tr oub leshooting guide troubleshooting problem possible cause solution detergent not drawing air is leaking tighten all clamps. Check detergent lines for holes. Injector head may be blocked, dirty or damaged clean and make sure ball and spring behind det...

  • Page 18: Oil Change Record

    9.800-079.0 • rev. 05/14 pressure w asher tr oub leshooting guide 18 preventative maintenance this pressure washer was produced with the best available materials and quality craftsmanship. However, you as the owner have certain responsibilities for the correct care of the equipment. Attention to reg...

  • Page 19

    9.800-079.0 • rev. 05/14 19 pressure w asher opera tor’s manu al “th is pr oduct con tain s che micals kn ow n to the sta te o f cal ifor nia to cau se can cer an d b irth de fects o r other rep roduct ive harm . Operat ion of thi s eq uip men t ma y cre ate sp ark s t hat c an star t fi res ar ound...

  • Page 20

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 20 exploded view - 550.0, 551.0, 552.0, 553.0 models chau d! Chaud ! 3 13 47 92 19 18 58 5 6 2 1 11 10 8 20 18 19 20 56 38 37 for detail see control box illus. 15 133 16 reversed view of component 50 53 41 82 31 99 31 52 74 61 76 40 42 ho...

  • Page 21

    9.800-079.0 • rev. 05/14 21 pressure w asher opera tor’s manu al exploded view - 550.0, 551.0, 552.0, 553.0 models 34 26 29 28 43 31 27 25 46 21 2 89 93 48 30 31 24 23 22 22 33 54 35 19 18 45 20 19 18 20 45 33 55 57 68 66 65 67 75 electric start model only 64 63 70 111 62 32 95 80 78 77 steam option...

  • Page 22: Exploded Views Parts List

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 22 exploded views parts list item part no. Description qty 1 8.719-913.0 top hat, coil 1 2 9.800-006.0 label, hot/caliente w/arrows warning 3 3 9.802-825.0 clip, retaining, u-type 4 4 9.198-004.0 3/8 uss f/w zinc 4 5 8.919-136.0 coil, dur...

  • Page 23: Exploded Views Parts List

    9.800-079.0 • rev. 05/14 23 pressure w asher opera tor’s manu al exploded views parts list item part no. Description qty 32 9.802-254.0 hose, 1/4", push-on, fuel line (steam option) 14 in. 33 9.802-075.0 box, battery, m-100 (552.0, 553.0) 1 9.802-076.0 plate, battery box, large, polypro (552.0, 553....

  • Page 24: Exploded View Parts List

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 24 item part no. Description qty 69 9.802-816.0 washer, 7/16" lock (551.0, 552.0, 553.0) 2 70 9.802-958.0 key, 0.185 sqr x 1.75" (555.0) 1 9.802-959.0 key, 0.247 sqr x 2.125 (550.0, 551.0, 552.0, 553.0) 1 71 9.803-108.0 retainer ring, ins...

  • Page 25: Exploded View Parts List

    9.800-079.0 • rev. 05/14 25 pressure w asher opera tor’s manu al exploded view parts list item part no. Description qty 108 9.803-092.0 fuel tank strap, long 2 109 9.802-459.0 switch, mv60 flow (steam option) 1 110 9.802-104.0 bushing, 3/4" snap (555.0) 1 111 9.802-254.0 hose, 1/4" push-on (555.0) 7...

  • Page 26

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 26 hour 1/10 item part no. Description qty 1 9.802-528.0 capacitor 1 2 9.802-531.0 regulator, voltage, 15 volt 1 3 9.803-036.0 box, electrical 1 4 9.803-121.0 assembly, cover, electrical box 1 5 8.750-094.0 thermostat, adjustable, 302°f 1...

  • Page 27

    9.800-079.0 • rev. 05/14 27 pressure w asher opera tor’s manu al item part no. Description qty 16 9.802-206.0 clamp, hose 1 17 9.802-791.0 nut, cage, 10/32" x 16 gauge 2 18 8.900-907.0 label, control panel 1 19 9.802-802.0 washer, 1/4", flat, sae 1 20 9.802-695.0 nut, 10/32" keps 4 21 9.802-771.0 sc...

  • Page 28

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 28 control panel - 550.0, 551.0, 552.0, 553.0 hou r 1/10 28 1, 23 2 6 14 4 5 28 12 11 9 10 8 13 19 22 15 16 3 17 20 18 21 7 25 24 27 26 19 25 29 item part no. Description qty 1 8.750-094.0 thermostat, adjustable, 302°f 1 2 9.803-035.0 cov...

  • Page 29

    9.800-079.0 • rev. 05/14 29 pressure w asher opera tor’s manu al item part no. Description qty 10 9.802-453.0 switch, curvette ra901vb-b-1-v, carling 1 11 9.802-519.0 strain relief, 1/2" metal, two screw 2 12 9.802-514.0 strain relief, small 1 13 9.803-071.0 box, electric, black 1 14 9.802-788.0 nut...

  • Page 30: Hose & Spray Gun Assembly

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 30 hose & spray gun assembly 3 2 1 8 6 5 4 7 item part no. Description qty 1 9.802-166.0 coupler, 3/8" female 1 9.802-100.0 quick coupler o-ring lg 1 2 8.739-125.0 hose, 3/8" x 50', 1 wire tuff flex (all models except 553.0) 1 8.739-203.0...

  • Page 31: Downstream Injector Assembly

    9.800-079.0 • rev. 05/14 31 pressure w asher opera tor’s manu al downstream injector assembly item part no. Description qty 1 9.802-216.0 injector, detergent, non-adjusting #3 1 9.802-215.0 injector, detergent, non-adjusting #2 1 2 6.390-126.0 clamp, hose, uni .46 - .54 2 3 9.802-251.0 tube, 1/4" x ...

  • Page 32: Hose Reel Option

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 32 hose reel option hose reel parts list item part no. Description qty 1 9.802-166.0 coupler, 3/8", female, brass 1 2 9.802-244.0 hose, 3/8", 2 wire pressure loop 1 3 9.802-269.0 hose reel, 100' non-pivot e-zee w/pin lock 1 4 9.802-767.0 ...

  • Page 33: Uu1 Unloader Exploded View

    9.800-079.0 • rev. 05/14 33 pressure w asher opera tor’s manu al uu1 unloader exploded view uu1 unloader exploded view parts list item part # description kit qty 1 8.751-394.0 piston housing d 1 2 piston c, d 1 3 piston o-ring back up a, d 1 4 8.749-796.0 main block 1 5 9.152-372.0 piston ring d 1 6...

  • Page 34

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 34 ks3540gr.3 pump exploded view 8.751-194.0 ks3540gr.3 ks3540gr.3 pump exploded view parts list torque specs item # ft.-lbs 14 75 15 30 24 7.6 38 10 item part no. Description qty 1 8.751-217.0 crankcase 1 2* see kit below plunger oil sea...

  • Page 35

    9.800-079.0 • rev. 05/14 35 pressure w asher opera tor’s manu al ks3540gr.3 pump exploded view parts list (cont.) item part no. Description qty 50* see kit below o-ring Ø1.78x5.28 3 51* see kit below teflon ring 3 52 8.751-225.0 plunger rod 3 53 8.751-228.0 connecting rod pin 3 54 9.803-158.0 connec...

  • Page 36: Kg.2 Pump Exploded View

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 36 kg.2 pump exploded view kg.2 pump exploded view parts list item part no. Description qty 1 9.803-938.0 crankcase 1 2* see kit below plunger oil seal 3 3* see kit below o-ring Ø1.78 x 31.47 3 4* see kit below pressure ring, 15mm 3 5* se...

  • Page 37

    9.800-079.0 • rev. 05/14 37 pressure w asher opera tor’s manu al kg.2 pump exploded view parts list (cont) item part no. Description qty 39 8.933-020.0 flange screw 4 46 9.803-142.0 crankshaft seal 1 47* see kit below plunger nut 3 48* see kit below copper washer 3 49* see kit below plunger, 15mm 3 ...

  • Page 38

    9.800-079.0 • rev. 05/14 opera tor’s manu al pressure w asher 38 replacement parts for best performance specify genuine kna replacement parts 5 4 50 51.

  • Page 39

    9.800-079.0 • rev. 05/14 39 pressure w asher opera tor’s manu al replacement parts for best performance specify genuine kna replacement parts item # p ar t # description qty item # p ar t # description qty 1 8.919-050.0 b urner housing assembl y 1 23 8.919-116.0 ignit or, b urner 12vdc 1 2 8.751-160...

  • Page 40: Specifications

    9.800-079.0 • rev. 05/14 pressure w asher specifications 40 specifications model # burner assy # fuel nozzle transformer burner motor fuel pump/ solenoid cord fuel pump/ solenoid coil electrode 1.575.555.0 8.918-910.0 9.802-585.0 9.802-663.0 9.802-638.0 9.802-562.0 9.802-639.0 9.802-670.0 1.575-550....

  • Page 41

    R www.Karchercommercial.Com form # 9.800-079.0 • revised 05/14 • printed in u.S.A. Or mexico.