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13

Operations

Operation Instructions

STEP 1:

 Turn on water at faucet 

and pull trigger on spray gun 

allowing water to flow until all air 

has discharged from system. 

Check for water leaks; tighten as 

needed.

STEP 4:

 With spray nozzle pointed 

away from you or anyone else, 

press trigger on spray gun to obtain 

pressurized cold water spray.

STEP 5:

 For hot water, turn burner 

switch ON when a steady stream of 

water flows out of the spray gun. 

Burner will light automatically.

NOTE:

 Do not start machine with 

burner switch on.

STEP 2:

 Before installing nozzle, 

turn on water supply and run 

machine allowing water to flush 

through the system until clear. Pull 

wand coupler collar back and insert 

desired pressure nozzle into 

coupler then secure by pushing 

coupler collar forward.

NOTE:

 Variable pressure control 

wand handle must be turned 

clockwise to enable water to flow 

out of the high pressure nozzle.

STEP 3:

 Read engine manual, turn 

on gas valve and choke. Turn the 

engine switch 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 ten 

seconds before operating the 

starter again. When the engine 

starts, allow the engine switch to 

return to the ON position. If the 

engine is to be started without the 

battery, turn switch to start position 

and pull rope to start. Turn off 

choke.

WARNING: Starter cord kickback 

(rapid retraction) can result in 

bodily injury. Kickback will pull 

hand and arm toward engine 

faster than you can let go. 

ALWAYS relieve spray gun 

pressure before pulling starter 

cord. Pull starter cord slowly 

until resistance is felt, then pull 

rapidly.
AVERTISSEMENT: Le retour du 

cordon de lancement (rétraction 

rapide) peut causer des lésions 

corporelles. La rétraction rapide 

de la corde du démarreur (recul) 

attire la main et le bras vers le 

moteur plus vite qu'il n'est 

possible de lâcher la corde. 

Toujours retenir la charge 

solidement en place avant de 

conduire. Tirer lentement sur le 

cordon de lancement jusqu'à ce 

qu'une résistance soit sentie, 

puis tirer rapidement.

CH

AU

D!

Gas 

Valve

Choke

Engine 

Switch

Landa MHC  9.800-950.0 - BM

Collar

SenD

EC

TAC

H/HOU

R

1/10

Burner
Switch 

Burner
Switch

For: 
MHC3-24324

Variable Pressure 

Control Handle

Trigger

Variable Pressure 

Wand (VP)

High Pressure 

Nozzle

Brass 

Soap 

Nozzle

Selection of high or low pressure is accompanied by turning the handle. 

NOTE:

 High pressure nozzle must be inserted at end of wand to obtain 

high pressure. To apply soap read Detergents and General Operating 

Techniques section.

Summary of Contents for MHC3-24324

Page 1: ...HOU R 1 10 MHC43500E MODELS MHC3 24324 1 110 087 0 MHC3 30324 1 110 038 0 MHC4 30324 1 110 039 0 MHC4 30324E 1 110 040 0 MHC4 30324E S 1 110 041 0 MHC4 35324E 1 110 042 0 MHC4 35324E CAL 1 110 084 0...

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

Page 3: ...4 Thermal Pump Protection 14 Shutdown Instructions 15 Maintenance Storage 16 After Extended Storage 16 Engine Maintenance 16 Maintenance And Service 17 Unloader Valves 17 Winterizing Procedure 17 High...

Page 4: ...omponents 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...

Page 5: ...perators Important Safety Information WARNING To reduce the risk of injury read operating instructions carefully before using AVERTISSEMENT Pour r duire le risque de blessures lire attentive ment les...

Page 6: ...or torch is permitted AVERTISSEMENT Risque d explo sion Utiliser uniquement dans des endroits o l utilisation d une flamme nue ou d une torche est permise ADVERTENCIA Riesgo de explosi n Opere s lo d...

Page 7: ...ted areas of the pressure washer AVERTISSEMENT Risque de bles sures Les surfaces chaudes peuvent causer des br lures Utiliser uniquement les zones de prise d sign es du pistolet pulv risateur et de la...

Page 8: ...e malfunction of the machine and 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 hotte...

Page 9: ...ly cool down or maintain the heating 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 whe...

Page 10: ...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 11: ...not included Brass Soap Nozzle Variable Pressure Control Wand Burner Switch Thermostat Garden Hose Inlet Connector Strainer Water Supply Hose not included Hour Meter Stackless Top Adapter Kit Stackles...

Page 12: ...el in proper tanks STEP 3 Attach wand to spray gun using teflon tape on threads to prevent leakage Attach swivel connector on discharge hose to spray gun using teflon tape on threads Attach swivel con...

Page 13: ...rating the starter again When the engine starts allow the engine switch to return to the ON position If the engine is to be started without the battery turn switch to start position and pull rope to s...

Page 14: ...best results limit your work area to sections approximately 6 feet square and always apply detergent from bottom to top Allow detergent to remain on surface 1 3 minutes Do not allow detergent to dry...

Page 15: ...to cool below 100 F STEP 5 Open spray gun to relieve remaining pressure STEP 3 Turn engine off Landa MHC 9 800 950 0 BM Sen DEC TACH HOUR 1 10 Burner Switch Burner Switch For MHC3 24324 HA UD Key Swi...

Page 16: ...feel increased pressure which indicates the piston is on its compression stroke and leave it in that position This closes both the intake and exhaust valves to prevent rusting of cylinder 4 Cover the...

Page 17: ...hose into the bucket and connect it to the machine Elevate the bucket and turn the pump on to siphon the anti freeze through the machine If compressed air is available an air fitting can be screwed in...

Page 18: ...band opening may need to be increased for lower altitude the air band may need to be decreased For higher humidity the air band opening may need to be increased for lower relative humidity the air ba...

Page 19: ...om pump unloader to inlet side of the coil 2 Remove thermostat sensor 3 Remove the tank head assembly by unscrewing six screws and lifting the top wrap off 4 Fold back insulation blanket 5 Remove the...

Page 20: ...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 21: ...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 22: ...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 23: ...50 hours and every month or 500 hours thereafter Use SAE 10W 40 non foaming oil MAINTENANCE SCHEDULE Pump Oil non foaming SAE 10W 40 Inspect Oil level daily Change After first 50 hours then every 500...

Page 24: ...24 Notes Landa MHC 9 800 950 0 BM...

Page 25: ...9 800 950 0 Printed in U S A...

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