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MHP
OPERATOR'S MANUAL
 MHP4-3000
 MHP4-3500
89139250-7
®
For technical assistance or the dealer nearest you,
consult our web page at www.landa.com
8.913-925.0

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Table of Contents
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Summarization of Contents

Introduction and Safety Information
Owner/User Responsibility
Users must understand operating instructions and warnings before use.
Save These Instructions
Manual is a permanent part of the machine; keep for future reference.
General Safety Warnings
Key safety precautions including ear protection, eye protection, and fire risks.
Important Safety Information
Specific Safety Precautions
Covers hot surfaces, discharge fluid, child supervision, wand grip, and coupler security.
Pressure and Environmental Safety
Warnings about high pressure, freezing, ventilation, and avoiding flammable vapors.
Important Safety Information
Safe Operation Practices
Avoid acids/abrasives, don't run dry, manage spray gun, protect hose, handle hot fluid, and avoid fatigue.
Fuel and Maintenance Safety
Use correct fuel, follow maintenance, and avoid unsafe operating conditions.
Component Identification
Major Components
Identifies key parts like wand, spray gun, hoses, pump, and controls.
Safety Features and Notes
Explains rupture disk, unloader valve, and pump protector functions.
Assembly Instructions
Water and Hose Connections
Attaching water supply and high-pressure hoses securely.
Control Wand and Trigger Setup
Connecting wand to spray gun and ensuring safety latch is engaged.
Fluid and Electrical Setup
Checking oil, filling tanks with correct fuel, and installing the battery.
Operating Instructions
Initial Startup Procedures
Reading manual, flushing system, connecting nozzle, and starting the engine.
Spraying and Hot Water Operation
Operating spray gun, using variable pressure, and engaging the burner for hot water.
Nozzle Selection and Usage
Choosing and using different colored nozzles for spray width and application.
Detergents and General Washing Techniques
Detergent Application
Using correct detergents, filling container, and connecting suction tube.
Cleaning Tips and Recommendations
Pre-rinsing, applying detergent, rinsing, and safe cleaning practices.
Thermal Pump Protection
How the system prevents pump damage from high temperatures.
Shutting Down and Clean-Up
Shutdown Procedure
Flushing with clean water, turning off burner and engine, and relieving pressure.
Storage Instructions
Protecting against freezing and preparing for storage.
Extended Storage and Maintenance
Procedures for storing over a month and preparing for restart.
Troubleshooting
Low Operating Pressure Issues
Common causes and solutions for low pressure, including water supply and unloader valve.
Burner Ignition Problems
Troubleshooting steps when the burner will not light, covering fuel, ignition, and wiring.
Troubleshooting
Burner and Smoke Issues
Diagnosing burner ignition failures and machine smoking problems.
Low Water Temperature and RPM
Addressing issues with low water temperature and engine RPM.
Troubleshooting
Water Temperature and Detergent Draw Issues
Troubleshooting high water temperature and no detergent draw.
Pump Pressure and Fluctuations
Resolving low pump pressure and fluctuating pressure problems.
Troubleshooting
Pump Noise and Oil/Water Leaks
Diagnosing noisy pumps and oil or water leaks from the pump.
Burner Motor and Relief Valve
Troubleshooting burner motor not running and relief valve leaks.
Preventative Maintenance
General Maintenance Practices
Regular checks, flushing, using correct fluids, and avoiding system damage.
Winterizing and Coil Cleaning
Procedures for protecting against freezing and cleaning lime deposits from coils.
Preventative Maintenance
Fuel System and Burner Maintenance
Fuel filter replacement, fuel solenoid valve function, and burner nozzle care.
Burner Adjustment and Settings
Adjusting fuel pressure, electrode settings, and burner air for optimal performance.
Preventative Maintenance
Burner Air Adjustments
Adjusting air bands for clean burning flame and specific smoke spots.
Coil Removal and Reinstallation
Steps for removing, cleaning, and reinstalling the heating coil.
Maintenance Schedule
Maintenance Schedule
Recommended inspection and service intervals for engine, pump, and burner.
Oil Change Record
Log for tracking engine and pump oil changes and operating hours.
Exploded View - Control Panel
Control Panel Diagram
Exploded view illustration of the control panel components.
Control Panel Parts List
List of part numbers and descriptions for control panel components.
Exploded View - Left Side
Left Side Component Diagram
Exploded view illustration of components on the left side of the machine.
Exploded View - Right Side
Right Side Component Diagram
Exploded view illustration of components on the right side of the machine.
Exploded View Parts List
Parts List (Items 1-36)
Detailed list of parts with part numbers and descriptions for specific items.
Exploded View Parts List
Parts List (Items 37-100)
Detailed list of parts with part numbers and descriptions for specific items.
Parts List (Items 101-128)
Detailed list of parts with part numbers and descriptions for specific items.
Exploded View - Detergent/Float Tank
Detergent/Float Tank Diagram
Exploded view illustration of the detergent and float tank components.
Detergent/Float Tank Parts List
Parts List
Detailed list of parts for the detergent/float tank.
Exploded View - Hose & Spray Gun
Hose & Spray Gun Diagram
Exploded view illustration of the hose and spray gun assembly.
Exploded View - Detergent Injector
Detergent Injector Diagram
Exploded view illustration of the detergent injector components.
Detergent Injector Parts List
List of part numbers and descriptions for the detergent injector.
Specifications
Landa Pump Specifications
Details on pump models, part numbers, pulleys, and bushings.
Specifications
Engine and Controls Specifications
Details on engine models, belt parts, pulleys, and controls.
Landa Sure Fire Burner Replacement Parts
Burner Assembly Diagram
Exploded view illustration of the Landa Sure Fire burner assembly.
Landa Sure Fire Burner Replacement Parts
Burner Parts List
Detailed list of replacement parts for the Landa Sure Fire burner.
LT.1 Series Pump Exploded View
LT.1 Series Pump Diagram
Exploded view illustration of the LT.1 series pump components.
LT.1 Series Pump Parts List
List of part numbers and descriptions for the LT.1 series pump.
LT.1 Series Pump Parts List (Cont)
LT.1 Series Pump Parts List (Cont.)
Continuation of part numbers and descriptions for the LT.1 series pump.
Repair Kit Information
Details on available repair kits and the components they include.
VRT3 Unloader Exploded View and Parts List
VRT3 Unloader Diagram
Exploded view illustration of the VRT3 unloader components.
VRT3 Unloader Adjustment Procedures
Step-by-step guide for adjusting the VRT3 unloader pressure.
Landa Limited New Product Warranty
What This Warranty Covers
Details on warranty periods for different components and types of parts.
What This Warranty Does Not Cover
Exclusions from warranty coverage, including wear items and damage types.
Obtaining Warranty Service
Procedures for registering the product and seeking warranty service from a dealer.

Table of Contents