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4

How To Use This Manual

This manual contains the following sections:

How to Use This Manual

Safety

Operations

Maintenance

Parts List

The HOW TO USE THIS MANUAL section will tell you 
how to find important information for ordering correct 
repair parts.

Parts may be ordered from authorized dealers. When 
placing an order for parts, the machine model and 
machine serial number are important. Refer to the 
MACHINE DATA box which is filled out during the 
installation of your machine. The MACHINE DATA box 
is located on the inside of the front cover of this manual. 

The model and serial number of your machine is 
located on the back of the machine.

The SAFETY section contains important information 
regarding hazardous or unsafe practices of the 
machine. Levels of hazards are identified that could 
result in product damage, personal injury, or severe 
injury resulting in death.

The OPERATIONS section is to familiarize the operator 
with the operation and function of the machine.

The MAINTENANCE section contains preventive main-
tenance to keep the machine and its components in 
good working condition. They are listed in this general 
order: 

Storage

Engine Maintenance

Maintenance And Service

Unloader Valves 

Winterizing Procedure

High Limit Hot Water Thermostat

Pump

Cleaning of Coils

Rupture Disk

Fuel 

Burner Nozzle

Landa Surefire Oil Burner

Landa Surefire Burner Air Adjustment

Fuel Pressure Adjustment

Removal of Soot and Heating Coil

Coil Reinstallation

Troubleshooting

Preventative Maintenance

The PARTS LIST section contains assembled parts 
illustrations and corresponding parts list. The parts lists 
include a number of columns of information:

REF – 

column refers to the reference number 

on the parts illustration.

PART NO.

 – column lists the part number for 

the part.

QTY

 – column lists the quantity of the part used 

in that area of the machine.

DESCRIPTION 

– column is a brief description 

of the part.

NOTES 

– column for information not noted by 

the other columns.

NOTE: If a service or option kit is installed on your 
machine, be sure to keep the KIT INSTRUCTIONS 
which came with the kit. It contains replacement parts 
numbers needed for ordering future parts.

NOTE: The manual part number is located on the 
lower right corner of the front cover.

Model:

Date of Purchase:

Serial Number:

Dealer:

Address:

Phone Number:

Sales Representative:

Landa MHC  9.800-950.0 - V

Summary of Contents for MHC3-25124

Page 1: ...or s Manual Pressure Washer Sen DE C TACH HOU R 1 10 MHC43500E MODELS MHC3 25124 1 110 037 0 MHC4 30324 1 110 039 0 MHC4 35324E 1 110 042 0 MHC3 30324 1 110 038 0 MHC4 30324E S 1 110 041 0 MHC4 30324E...

Page 2: ...2 Landa MHC 9 800 950 0 V Machine Data Label...

Page 3: ...Valves 15 Winterizing Procedure 15 High Limit Hot Water Thermostat 15 Pumps 15 Cleaning of Coils 15 Rupture Disk 15 Fuel 15 Burner Nozzle 16 Landa MHC Oil Burner 16 Landa MHC Burner Air Adjustment 16...

Page 4: ...good working condition They are listed in this general order Storage Engine Maintenance Maintenance And Service Unloader Valves Winterizing Procedure High Limit Hot Water Thermostat Pump Cleaning of C...

Page 5: ...ed with the operator in the operator s native language by the purchaser owner making sure that the operator comprehends its contents Owner and or user must study and maintain for future reference the...

Page 6: ...will result in fire and or explosion WARNING Risk of fire Do not Spray flammable liquids 7 Allow engine to cool for 2 minutes before refueling If any fuel is spilled make sure the area is dry before t...

Page 7: ...result in death serious bodily injury and or property damage Follow storage instructions specified in this manual 17 Inlet water must be clean fresh water and no hotter then 90 F WARNING Risk of asph...

Page 8: ...ng coil may result in a steam explosion 26 Do not overreach or stand on unstable support Keep good footing and balance at all times 27 Do not operate this machine when fatigued or under the influence...

Page 9: ...unlikely event the unloader valve fails Unloader Valve Safety device which when the spray gun closes prevents over pressurization not shown NOTE If trigger on spray gun is released for more than 2 mi...

Page 10: ...k engine oil Fill fuel tank Do not confuse gasoline and fuel oil diesel tanks Keep proper fuel in proper tanks STEP 3 Attach wand to spray gun using teflon tape on threads to prevent leakage Attach sw...

Page 11: ...ch to the START position and hold it there until the engine starts NOTE Do not use the electric starter for more than five seconds at a time If the engine fails to start release the switch and wait te...

Page 12: ...into cleaning solution and apply to surface at low pressure for best results limit your work area to sections approximately 6 feet square and always apply detergent from bottom to top Allow detergent...

Page 13: ...ull trigger on spray gun and siphon water for one minute STEP 4 Turn off water supply STEP 2 Turn burner switch off and continue spraying allowing the water to cool below 100 F STEP 5 Open spray gun t...

Page 14: ...m pressure washer hoses spray gun or wand Engine Maintenance During the winter months rare atmospheric conditions may develop which will cause an icing condition in the carburetor If this develops the...

Page 15: ...y SAE 10W 40 non detergent oil Change oil after the first 50 hours of use Thereafter change the oil every three months or at 500 hour intervals Oil level should be checked by using the dipstick found...

Page 16: ...d for best smoke spot and performance compliant with local state and federal regulations Landa MHC Oil Burner Burner Air Adjustment To adjust fuel pressure First install a pressure gage into the port...

Page 17: ...3 Remove the two pipe nipples and associated fittings See page 25 4 Remove bolt Item 75 5 Lift the coil out of the bottom wrap CAUTION The coil weighs about 80 lbs Use proper lifting techniques 6 Clea...

Page 18: ...e center for details BURNER WILL NOT LIGHT There is little or no fuel Fill tank with fuel Improper fuel or water in fuel Drain fuel tank and fill with proper fuel Fuel line is clogged Clean or replace...

Page 19: ...educe fuel pressure PSI Increase air band set for cleaner without max water heat loss LOW WATER TEMPERATURE Fuel is improper or has water in it Replace with clean and proper fuel Fuel pressure is low...

Page 20: ...t higher alti tudes it may be necessary to install a high altitude main jet in the carburetor Contact your local authorized engines sales and service center for details PUMP NOISY Air is in suction li...

Page 21: ...s Oil Change Record Check pump oil level before first use of your new Power Washer Change pump oil after first 50 hours and every month or 500 hours thereafter Use SAE 10W 40 non foaming oil MAINTENAN...

Page 22: ...22 Notes Landa MHC 9 800 950 0 V...

Page 23: ...23 Parts Parts LANDA MHC MHC3 25124 1 110 037 0 MHC4 30324 1 110 039 0 MHC4 30324E 1 110 042 0 MHC3 30324 1 110 038 0 MHC4 30324E S 1 110 41 0 MHC4 30324E 1 110 040 0 Landa MHC 9 800 950 0 V...

Page 24: ...36 39 73 37 78 50 15 92 42 43 19 81 54 66 67 68 34 58 87 40 77 51 95 98 95 100 103 102 97 74 14 33 82 91 80 93 86 77 87 104 69 70 76 93 91 66 75 84 78 89 82 89 90 99 116 3 3 54 58 10 9 41 89 41 89 8 6...

Page 25: ...25 Landa MHC 9 800 950 0 V Landa MHC Coil 21 22 27 6 91 85 101 4 88 20 32 31 75 85 40 45 23 48 16 12 46 61 17 60 94 11 47 109 26...

Page 26: ...409 0 4 CONNECTOR LEVER NUT 2 WIRES NOT SHOWN 8 756 410 0 2 CONNECTOR LEVER NUT 3 WIRES NOT SHOWN 8 756 411 0 1 CONNECTOR LEVER NUT 5 WIRES NOT SHOWN 5 9 800 018 0 1 LABEL TIP HAZARD 6 8 933 009 0 2 G...

Page 27: ...0 1 LABEL OP INSTRUCTION MT 44 9 800 049 0 1 LABEL MANF CLEANING 45 9 802 013 0 1 NIPPLE 1 2 X 2 1 2 GALV SCH 80 46 9 802 041 0 1 ELBOW 3 8 STL STREET 45 MXF 47 9 802 043 0 1 ELBOW 1 2 JIC X 1 2 FEM...

Page 28: ...REW 1 4 X 1 2 HH NC WHIZ LOC 79 9 802 766 0 6 SCREW 3 8 X 1 HX WASH HEAD SHEET METAL ZN 80 9 802 768 0 4 SCREW 3 8 X 1 1 4 WHIZ LOC HONDA 9 802 707 0 4 BOLT 5 16 24 X 3 4 7HP ROBIN 81 9 802 773 0 4 NU...

Page 29: ...NOZZLE HOLDER 107 8 706 546 0 1 GROMMET 1 3 8 X 2 1 8 X 3 8 108 9 802 254 0 4 in HOSE 1 4 PUSH ON 109 9 802 260 0 27 in HOSE 5 8 PUSH ON 110 9 802 722 0 1 BOLT 3 8 X 1 1 4 111 8 924 335 0 1 RAIL PUMP...

Page 30: ...30 Control Panel Landa MHC 9 800 950 0 V 23 9 10 3 26 6 13 5 21 4 2 1 11 16 17 8 18 15 23 20 12 14 24 18 25 19 28 23 22 5 27 29 24 19 18 7 23...

Page 31: ...040 0 1 LABEL GROUND SYMBOL 14 8 915 329 0 1 LABEL HORZ MHC CONTROL PANEL 15 9 802 515 0 2 STRAIN RELIEF STRT LQ TITE 3200 16 9 802 519 0 1 STRAIN RELIEF 1 2 METAL TWO SCREW 17 9 802 525 0 2 LOCKNUT 1...

Page 32: ...PART NO QTY DESCRIPTION NOTES 1 9 802 216 0 1 INJECTOR DET NON ADJUST 3 2 6 390 126 0 2 CLAMP HOSE 3 9 802 251 0 6 ft TUBE 1 4 X 1 2 CLEAR VINYL 4 8 707 057 0 1 STRAINER 1 4 HOSE BARB 9 802 225 0 2 1...

Page 33: ...NOZZLE SAQCMEG 1504 YELLOW 4 3000 8 712 345 0 1 NOZZLE SAQCMEG 0004 RED 4 3000 8 712 347 0 1 NOZZLE SAQCMEG 2504 GREEN 4 3000 8 712 348 0 1 NOZZLE SAQCMEG 4004 WHITE 4 3000 8 712 338 0 1 NOZZLE SAQCM...

Page 34: ...UNLOADER VBT BANJO 3000PSI 3 8 707 256 0 1 PUMP PROTECTOR 140 4 8 933 006 0 1 SWITCH FLOW MV60 5 8 706 207 0 1 ELBOW 3 8 STREET 90 DEG STEEL 6 9 802 039 0 1 ELBOW 1 2 JIC X 3 8 MPT 7 9 802 132 0 1 ELB...

Page 35: ...933 006 0 1 SWITCH FLOW MV60 5 9 802 190 0 1 VALVE EZ START 3 8 MPT X 1 8 FPT 6 8 706 207 0 1 ELBOW 3 8 STREET 90 DEG STEEL 7 8 706 958 0 1 HOSE BARB 1 4 BARB X 1 4 PIPE 90 8 9 802 039 0 1 ELBOW 1 2 J...

Page 36: ...36 Pump 8 918 611 0 8 918 611 0 MHC4 30324 4 30324E 4 30324E S 4 35324E 5 8 10 6 9 1 4 11 3 2 12 7 12 Landa MHC 9 800 950 0 V...

Page 37: ...ROTECTOR 1 2 190 4 8 933 006 0 1 SWITCH FLOW MV60 5 9 802 190 0 1 VALVE EZ START 3 8 MPT X 1 8 FPT 6 8 706 168 0 1 ELBOW 3 8 MALE PIPE 7 8 706 955 0 1 HOSE BARB 1 4 BARB X 1 8 MPT 90 DEG 8 8 706 958 0...

Page 38: ...2 11 8 754 853 0 1 MANIFOLD 12 8 717 233 0 6 O RING 1 78 X 15 6 SEE KITS TABLE 13 6 VALVE ASSEMBLY SEE KITS TABLE 14 9 803 948 0 6 O RING 1 78 X 18 77 SEE KITS TABLE 15 9 803 949 0 6 VALVE PLUG 16 8 7...

Page 39: ...9 803 218 0 10 WASHER 6MM 37 8 752 824 0 4 SCREW M6 X 20 38 8 754 855 0 3 BOLT PLUNGER SEE KITS TABLE 39 8 754 092 0 3 SPACER COPPER SEE KITS TABLE 40 8 754 849 0 3 PLUNGER 14 MM SEE KITS TABLE 41 9...

Page 40: ...SEE KITS TABLE 14 9 802 928 0 6 VALVE PLUG 15 9 802 938 0 8 MANIFOLD STUD BOLT 16 9 802 884 0 8 WASHER 17 9 803 198 0 1 COPPER WASHER 3 8 18 9 802 925 0 2 BRASS PLUG 3 8 23 9 803 210 0 4 WASHER M6 X 1...

Page 41: ...221 0 4 SPRING WASHER 46 3 PLUNGER NUT M6 SEE KITS TABLE 47 3 WASHER COPPER 9 2 X 13 5 SEE KITS TABLE 48 3 PLUNGER 15MM SEE KITS TABLE 49 3 COPPER SPACER SEE KITS TABLE 50 3 O RING 1 78X5 28 SEE KITS...

Page 42: ...O RING 2 62 X 20 24 SEE KITS TABLE 6 9 803 908 0 1 BACKUP RING SEE KITS TABLE 7 9 803 907 0 1 GUIDE BUSHING 8 9 803 906 0 1 O RING 1 78 X 14 SEE KITS TABLE 9 8 754 959 0 1 BALL SUBASSEMBLY 696 0 703...

Page 43: ...0 1 POPPET SPRING SEE KITS TABLE 22 8 754 939 0 1 POPPET SEE KITS TABLE 23 8 754 940 0 1 O RING 3 X 6 SEE KITS TABLE 24 8 754 961 0 1 PLATE 696 0 703 0 SEE KITS TABLE 9 803 922 0 1 PLATE 700 0 701 0 7...

Page 44: ...44 VBA 35 Unloader Valve Landa MHC 9 800 950 0 V 9 803 900 0 12 11 25 24 23 22 21 8 10 17 18 19 20 20 13A 13 14 15 16 17 9 8 7 6 5 4 3 2 1...

Page 45: ...E 13A 9 802 892 0 CONNECTOR MALE 14 1 O RING KIT A B 15 1 SPRING KIT B 16 1 POPPET KIT B 17 9 802 893 0 2 SEAL WASHER 3 8 18 9 803 915 0 1 BANJO BOLT 3 8 W 1 8 PILOT 9 803 919 0 BANJO BOLT 3 8 SOLID C...

Page 46: ...46 Wayne Burner Landa MHC 9 800 950 0 V...

Page 47: ...BAND OUTER MSR MSRDC 11 8 700 721 0 1 COUPLING FOR 079021X 12 8 700 704 0 1 OIL LINE 6 13 8 756 437 0 1 PUMP COMBO W SOLENOID 12V 24V 14 13494 1 ELBOW USE WITH 13 15 8 756 451 0 1 GUN ASSEMBLY GUN RG...

Page 48: ...9 800 950 0 Printed in U S A...

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