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9.801-811.0 • Rev. 06/17

    

PRESSURE WASHER   

SERVICE MANUAL

24

TROUBLESHOOTING

PROBLEM

POSSIBLE CAUSE

SOLUTION

PUMP RUNNING 

NORMALLY BUT  

PRESSURE LOW ON  

INSTALLATION 

Pump sucking air

Check water supply and possibility of air seepage.

Check valves sticking

Check and clean or replace if necessary.

Unloader valve seat faulty

Check and replace if necessary.

Nozzle incorrectly sized

Check and replace if necessary.

Worn piston packing

Check and replace if necessary.

FLUCTUATING  

PRESSURE

Valves worn

Check and replace if necessary.

Blockage in valve

Check and replace if necessary.

Pump sucking air

Check water supply connections.

Worn piston packing

Check and replace if necessary.

Insufficient water

Check filter and hose for breakage.

PRESSURE LOW AFTER 

PERIOD OF NORMAL 

USE

Nozzle worn

Check and replace if necessary.

Suction or delivery valves worn

Check and replace if necessary.

Suction or delivery lines blocked

Check and clean if necessary.

Unloader valve seat worn

Check and replace if  necessary.

Worn piston packing

Check and replace if necessary.

Water temperature excessive

Reduce to below 160

F.

PUMP NOISY

Air in suction line

Check water supply and connections on suction 
line.

Broken or weak suction or delivery 
valve spring

Check and replace if necessary.

Foreign matter in valves

Check and clean if necessary.

Worn bearings

Check and replace if necessary.

Excessive temperature of water

Reduce to below 160

F.

PRESENCE OF WATER 

IN PUMP OIL

Oil seal worn

Check and replace if necessary.

High humidity in air

Check and replace if necessary.

Piston packing worn

Check and replace if necessary.

WATER DRIPPING FROM 

UNDER PUMP

Piston packing worn

Check and replace if necessary.

O-ring plunger retainer worn

Check and replace if necessary.

WATER DRIPPING FROM 

PUMP PROTECTOR

Water supply pressure too high (over 
90 PSI)

Lower water supply pressure using a regulator.

Spray gun is in the off position for over 
5 minutes

Turn machine off if not in use for over 1-2 minutes.

OIL DRIPPING

Oil seal worn

Check and replace if necessary.

EXCESSIVE VIBRATION 

IN HIGH PRESSURE 

HOSE

Irregular functioning of the pump 
valves

Check and replace if necessary.

MOTOR DOES 

NOT START WHEN 

SWITCHED ON

Plug not well connected or lack of 
power supply

Check plug, cable and switch.

WHEN SWITCHING ON 

THE MACHINE, MOTOR 

HUMS BUT DOES NOT 

RUN

Main voltage is insufficient, lower than 
the minimum required

Check to make sure main power supply is ad

-

equate.

The pump is stuck or frozen

Check by turning the motor manually.

MOTOR STOPS

Tripped thermal overload due to over

-

heating

Check that main voltage corresponds to the speci

-

fications. Wait a few minutes before turning on the 
machine again by resetting the GFCI cord.

Summary of Contents for 1.106-124.0

Page 1: ...9 801 811 0 SERVICE MANUAL MODEL ORDER HD 2 0 1000 Ed 1 106 124 0 HD 1 9 1300 Ed 1 106 125 0 HD 3 0 1000 Ea 1 106 126 0 HD 3 5 2000 Ea HD 1 8 1300 Ed 1 106 127 0 1 106 128 0 ...

Page 2: ......

Page 3: ... 10 LF2030S Series Pump Exploded view and part s list 11 12 LF3530F Series Pump Exploded view and part s list 13 14 LF2030F Series Pump Exploded view and part s list 15 16 LF2830S Series Pump Exploded view and part s list 17 18 VRT3 Unloader exploded view and part s list 19 Wiring Diagram 20 23 Troubleshooting 24 Preventative Maintenance 25 ...

Page 4: ...mber utility company or the selling distributor for specific details If your machine is rated 250 volts or less single phase will be provided with a ground fault circuit interrupter GFCI If rated more than 250 volts or more than single phase this product should only be connected to a power supply receptacle protected by a GFCI DANGER Improper connection of the equipment grounding conductor can res...

Page 5: ...NG Protect machine from freezing 13 To keep machine in best operating conditions it is important you protect machine from freezing Failure to protect machine from freezing could cause malfunction of the machine and result in death serious bodily injury and or property damage Fol low storage instructions specified in this manual 14 Inlet water must be clean fresh water and no hotter then 90 F 15 Ma...

Page 6: ... 27 2 3 18 7 6 3 39 5 37 10 9 8 15 14 23 22 4 16 51 53 1 For Detail See Pump Assy 20 21 19 17 38 38 39 47 54 40 50 40 56 52 57 43 47 55 55 46 36 48 48 46 42 42 39 43 44 44 45 45 24 23 49 38 39 17 55 54 17 54 Models HD 1 9 1300 Ed HD 3 0 1000 Ea HD 3 5 2000 Ea Model HD 2 0 1000 Ed Model HD 1 8 1300 Ea 58 58 ...

Page 7: ... 2 1 3000 3450RPM HD 1 9 1300 Ed HD 1 8 1300 Ed 1 8 754 761 0 Pump Leuco LF2030S 2 1 3000 1725RPM HD 2 0 1000 Ed 1 8 754 763 0 Pump Leuco LF2830S 2 8 3000 1725RPM HD 3 0 1000 Ea 1 8 754 764 0 Pump Leuco LF3530F 3 5 3000 3450RPM HD 3 5 2000 Ea 1 20 9 198 004 0 3 8 USS F W Zinc 4 21 9 802 720 0 Bolt 3 8 x 1 NC HH 4 22 9 802 710 0 Screw 5 16 x 1 NC 4 23 8 718 980 0 Washer 5 16 Flat SAE 8 24 9 802 776...

Page 8: ... NPT 23 45D HD 1 8 1300 Ea 2 9 802 518 0 Strain Relief LT STR 3 4 NPT 49 71D HD 3 5 2000 Ea HD3 0 1000 Ea HD1 9 1300 Ed 1 44 8 900 840 0 Label Remote Switch Home Depot HD 1 8 1300 Ea 1 45 9 802 451 0 Switch Rocker Carling Green LENS875858 HD 1 8 1300 Ea 1 9 802 450 0 Switch 2POS 120V 600V 1 3PH HD 3 5 2000 Ea HD3 0 1000 Ea HD1 9 1300 Ed 1 46 9 802 477 0 Box Plastic Carlon E9801 W O LID HD 1 8 1300...

Page 9: ... 3450RPM HD 3 5 2000 Ea 1 2 8 707 256 0 Pump protector 1 2 1 3 8 706 168 0 Elbow 3 8 NPT p n tf3529x6 Steel 1 4 8 750 299 0 Unloader Vrt3 8 GPM 4500 psi 1 5 8 706 207 0 Elbow 3 8 Street 90 deg Steel 1 6 9 802 171 0 Coupler 3 8 Clug Male Steel zinc 1 7 8 706 944 0 Hose Barb 3 8 barb x 3 8 ML 2 8 8 711 785 0 Hose 3 8 Push on per ft 18 9 8 706 917 0 Bushing 1 2 x 3 8 Brass 1 10 8 706 860 0 Tee 1 2 St...

Page 10: ...256 0 Pump protector 1 2 1 3 8 706 207 0 ELBOW 3 8 STREET 90 DEG STEEL 1 4 9 802 362 0 UNLOADER PA 8 3650 VB8 W SWITCH 1 5 9 802 171 0 Coupler 3 8 Clug Male Steel zinc 1 6 8 706 944 0 Hose Barb 3 8 barb x 3 8 ML 2 7 8 711 785 0 Hose 3 8 Push on per ft 18 8 8 706 917 0 Bushing 1 2 x 3 8 Brass 1 9 8 706 860 0 Tee 1 2 Street Brass 1 10 8 706 984 0 Adapter 1 2 FTP x 1 2 MPT brass 18 11 8 706 829 0 Elb...

Page 11: ...llow 1 33 8 754 219 0 Oil Dipstick 1 34 8 754 840 0 Bearing Needle 1 35 8 754 826 0 Seal Crankshaft 1 36 8 754 844 0 Flange Motor 1 37 9 803 210 0 Washer 10 38 8 752 824 0 Screw 6 mm 4 ITEM PART NO DESCRIPTION QTY 1 8 754 841 0 Crankcase 1 2 8 754 846 0 O ring Ø1 78 X 72 75 1 3 See Kits Below Plunger Oil Seal 3 4 See Kits Below O ring Ø1 78 X 26 7 3 5 See Kits Below Washer Pressure Ring 3 6 See Ki...

Page 12: ...od 6 47 8 754 847 0 O ring Ø2 62 X 111 62 1 48 8 754 842 0 Cover Crankcase 1 49 9 803 906 0 O ring Ø1 78 X 14 1 50 9 803 202 0 Sight Glass G3 4 1 REPAIR KIT NUMBER 8 754 860 0 8 754 856 0 8 754 861 0 8 754 857 0 8 754 862 0 8 754 858 0 8 754 859 0 9 803 937 0 KIT DESCRIP TION Plunger Seals 14 mm Plunger Seals 16 mm Seal Pack ing 14 mm Seal Pack ing 16 mm Plunger 14 mm Plunger 16 mm Complete Valve ...

Page 13: ... 5 8 Hollow 1 33 8 754 219 0 Oil Dipstick 1 34 8 754 840 0 Bearing Needle 1 35 8 754 826 0 Seal Crankshaft 1 36 8 754 844 0 Flange Motor 1 37 9 803 210 0 Washer 10 38 8 752 824 0 Screw 6 mm 4 ITEM PART NO DESCRIPTION QTY 1 8 754 841 0 Crankcase 1 2 8 754 846 0 O ring Ø1 78 X 72 75 1 3 See Kits Below Plunger Oil Seal 3 4 See Kits Below O ring Ø1 78 X 26 7 3 5 See Kits Below Washer Pressure Ring 3 6...

Page 14: ...g Rod Pin 3 45 9 803 966 0 Connecting Rod 3 46 8 933 020 0 Screw Connecting Rod 6 47 8 754 847 0 O ring Ø2 62 X 111 62 1 48 8 754 842 0 Cover Crankcase 1 49 9 803 906 0 O ring Ø1 78 X 14 1 50 9 803 202 0 Sight Glass G3 4 1 REPAIR KIT NUMBER 8 754 860 0 8 754 861 0 8 754 862 0 8 754 859 0 9 803 937 0 KIT DE SCRIPTION Plunger Seals 14 mm Seal Packing 14 mm Plunger 14 mm Complete Valve Plunger Oil Se...

Page 15: ...0 Shaft 5 8 Hollow 3530F 1 33 8 754 219 0 Oil Dipstick 1 34 8 754 840 0 Bearing Needle 1 35 8 754 826 0 Seal Crankshaft 1 36 8 754 844 0 Flange Motor 1 37 9 803 210 0 Washer 10 38 8 752 824 0 Screw 6 mm 4 8 953 760 0 LF 2030F ITEM PART NO DESCRIPTION QTY 1 8 754 841 0 Crankcase 1 2 8 754 846 0 O ring Ø1 78 X 72 75 1 3 See Kits Below Plunger Oil Seal 3 4 See Kits Below O ring Ø1 78 X 26 7 3 5 See K...

Page 16: ...Rod Pin 3 45 9 803 966 0 Connecting Rod 3 46 8 933 020 0 Screw Connecting Rod 6 47 8 754 847 0 O ring Ø2 62 X 111 62 1 48 8 754 842 0 Cover Crankcase 1 49 9 803 906 0 O ring Ø1 78 X 14 1 50 9 803 202 0 Sight Glass G3 4 1 REPAIR KIT NUMBER 8 754 860 0 8 754 861 0 8 754 862 0 8 754 859 0 9 803 937 0 KIT DESCRIPTION Plunger Seals 14 mm Seal Packing 14 mm Plunger 14 mm Complete Valve Plunger Oil Seals...

Page 17: ... 6 13 See Kit Below Valve Assembly 6 14 9 803 948 0 O ring Ø1 78 X 18 77 6 15 9 803 949 0 Valve Plug 6 16 8 754 851 0 Plug Brass G1 4 1 17 8 754 845 0 Washer Copper G1 4 1 18 8 754 854 0 Bolt Manifold M14 X 40 2 19 8 754 850 0 Washer Lock 2 ITEM PART NO DESCRIPTION QTY 20 9 803 198 0 Washer Copper G3 8 1 21 8 707 262 0 Plug Brass G3 8 2 22 See Kits Below Valve Seat 6 23 See Kits Below Valve Plate ...

Page 18: ... KIT WILL SERVICE 3 3 1 1 1 1 6 3 LF2830S SERIES PUMP EXPLODED VIEW PARTS LIST ITEM PART NO DESCRIPTION QTY 36 8 754 844 0 Flange Motor 1 37 9 803 210 0 Washer 10 38 8 752 824 0 Screw 6 mm 4 39 8 754 855 0 Bolt Plunger 3 40 8 754 092 0 Spacer Copper 3 41 8 754 848 0 Plunger 16mm 2030S 2830S 3 8 754 849 0 Plunger 14mm 2030F 2830F 3530F 3 42 9 803 962 0 Spacer Copper 3 43 8 754 827 0 Plunger Rod 3 4...

Page 19: ...re 6 Remove the adjustment knob Item 18 tighten the lower nut Item 15 tightly against the upper nut Item 15 Reattach adjustment knob Item 18 and screw down until contact is made with the nuts Items 15 Screw down lock nut Item 19 onto the stem Item 8 until the threads cut into the nylon insert of the lock nut Item 19 If adjustment knob Item 18 DOES NOT make contact with upper nut Items 15 remove ad...

Page 20: ...9 801 811 0 Rev 06 17 PRESSURE WASHER SERVICE MANUAL 20 WIRING DIAGRAM 1 106 124 0 HD 2 0 1000 Ed ...

Page 21: ...9 801 811 0 Rev 06 17 21 PRESSURE WASHER SERVICE MANUAL WIRING DIAGRAM 1 3 2 4 NTROL SWITCH W ALL WIRES BLACK UNLESS NOTED G GREEN W WHITE FOR 1 106 125 0 HD 1 9 1300 Ed FOR 1 106 126 0 HD 3 0 1000 Ea ...

Page 22: ...17 PRESSURE WASHER SERVICE MANUAL 22 WIRING DIAGRAM MOTOR PUMP 4 CONTROL SWITCH 2 G Y 3 1 G Y G Y G Y 220V 1PH INCOMING POWER WIRE COLOR LEGEND ALL WIRES BLACK UNLESS NOTED G Y GREEN YELLOW FOR 1 106 127 0 HD 3 5 2000 Ea ...

Page 23: ...T PUMP MOTOR RESET IN 5 2 3 6 7 N C TIMER PRESSURE SWITCH 120V GFCI G G G W W W C NC NO 1 2 6 120V COIL STARTER MAGNETIC TIMER 120V B B B T1 13 G B T2 N O B 14 L1 L2 W W W W G OUT WIRE COLOR LEGEND ALL WIRES BLACK UNLESS NOTED W WHITE G GREEN B BLACK FOR 1 106 128 0 HD 1 8 1300 Ed ...

Page 24: ...ce if necessary Foreign matter in valves Check and clean if necessary Worn bearings Check and replace if necessary Excessive temperature of water Reduce to below 160o F PRESENCE OF WATER IN PUMP OIL Oil seal worn Check and replace if necessary High humidity in air Check and replace if necessary Piston packing worn Check and replace if necessary WATER DRIPPING FROM UNDER PUMP Piston packing worn Ch...

Page 25: ... life of your pressure washer Perform maintenance more often under severe conditions OIL CHANGE RECORD Check pump oil and engine oil level before first use of your new pressure washer Date Oil Changed Month Day Year Estimated Operating Hours Since Last Oil Change Date Oil Changed Month Day Year Estimated Operating Hours Since Last Oil Change MAINTENANCE SCHEDULE Pump Oil Inspect Daily inspect the ...

Page 26: ...KNA Inc 4555 Airport Way Denver CO 80239 Form 9 801 811 0 Rev 06 17 Printed in U S A or Mexico ...

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