This document describes the Simpson MS60805 Premium Pressure Washer, an instruction manual detailing its function, usage, and maintenance.
Function Description
The Simpson MS60805 is a premium pressure washer designed for various cleaning tasks. Its primary function is to increase the pressure of a water supply, delivering a high-velocity stream for effective cleaning. The unit is powered by an engine that drives a high-pressure pump. It features a detergent injection system, allowing for the mixing of cleaning agents or solvents with the water to enhance cleaning effectiveness. The pressure washer is equipped with a quick-connect spray wand that enables users to easily change high-pressure nozzles, adapting the spray pattern and intensity to different cleaning requirements. A surface cleaner accessory is also available for use on flat, horizontal surfaces. The unit is designed for outdoor use in well-ventilated areas, emphasizing safety precautions against carbon monoxide poisoning from engine exhaust and fluid injection risks from the high-pressure spray.
Usage Features
Operating the Simpson MS60805 involves several key steps and features designed for user convenience and safety:
- Assembly: The handle is easily installed by depressing snap buttons and sliding it onto the frame until it locks into place.
- Engine Preparation: Before starting, the engine requires oil (if not already present) and fresh, high-quality, unleaded gasoline with a pump octane rating of 86 or higher. The fuel tank should not be overfilled, and any spilled fuel must be wiped up. Ethanol Shield™ fuel stabilizer is recommended to prevent ethanol-related problems.
- Water Connection: A garden hose connects to the pump inlet, and a high-pressure hose connects from the pump outlet to the spray gun. The water faucet must be turned completely on, and cold water should be used. It is crucial to release all air from the pump and high-pressure hose by depressing the trigger until a steady stream of water is present (approximately 30 seconds) before starting the engine.
- Starting Procedure: The fuel valve should be in the OPEN position, and the engine switch in the ON position. The choke pin is initially pulled out to the CLOSED position. The recoil starter grip is then pulled to start the engine, and once started, the choke pin is gradually moved to the OPEN position.
- Nozzle Selection: The quick-connect spray wand allows for easy changing of nozzles, which are color-coded to indicate different spray patterns and uses:
- Red (0°): Powerful pinpoint spray for spot cleaning hard, unpainted surfaces or high-reach areas. Not for use on wood.
- Yellow (15°): Intense cleaning of unpainted hard surfaces like grills, driveways, concrete, brick walkways, or stucco.
- White (40°): For cleaning painted or delicate surfaces such as auto/RV, marine, wood, painted brick and stucco, or vinyl siding.
- Black (Low Pressure): Applies cleaning solutions. This low-pressure spray is safe on all surfaces, but compatibility with the cleaning solution should always be verified.
- Pressure Adjustment: The pressure setting is factory preset for optimum cleaning. To lower pressure, users can back away from the surface or switch to the 40° (white) nozzle. Attempting to increase pump pressure beyond factory settings is not recommended and may damage the pump.
- Chemical Application: Chemicals or cleaning solvents are applied using the low-pressure black nozzle. The detergent tank is filled with cleaning solvent, and the system draws the solution at a ratio of approximately 1 gallon of chemical per 7 gallons of water. After chemical use, the detergent tank should be filled with clean water to thoroughly rinse the injection system.
- Surface Cleaner: The surface cleaner accessory is installed by inserting its inlet plug into the spray wand's quick-connect coupler. It is designed for use on flat, horizontal surfaces and should not be lifted from the cleaning surface while operating.
- Safety Features: The unit includes a thermal relief valve that opens to release water and cool the pump if the internal temperature rises too high, preventing damage from overheating. A trigger lock on the spray gun should always be engaged when the gun is not in use to prevent accidental spraying.
Maintenance Features
Regular maintenance is crucial for the efficient operation and longevity of the pressure washer:
- Engine Maintenance: Users should consult the separate Engine Owner's Manual for specific recommendations regarding engine maintenance, including oil checks and changes. The engine drain plug is located at the rear of the unit.
- Pump Maintenance: The pump is maintenance-free and does not require oil to be added or changed. If pump issues arise, users are directed to contact customer service.
- Connections: Connections on hoses, the gun, and the spray wand should be cleaned regularly and lubricated with light oil or lithium grease to prevent leaks and damage to o-rings.
- Nozzle Maintenance: If a nozzle becomes clogged, leading to excessive pressure or pulsating pump pressure, it should be cleaned immediately. This involves shutting off the pressure washer and water supply, relieving pressure by pulling the trigger, disconnecting the spray wand, removing obstructions with a nozzle cleaning tool, and backflushing with clean water.
- Surface Cleaner Nozzle Maintenance: The surface cleaner has two pre-assembled nozzles. If these become clogged, causing pulsing or vibration, the pressure washer and water supply should be turned off, pressure relieved, and the surface cleaner disconnected. A straightened paper clip or nozzle cleaning tool can be used to free foreign materials, followed by backflushing with a garden hose.
- Water Inlet Filter: The screen filter in the water inlet of the pump should be checked periodically and cleaned by removing it, flushing it with water, and re-inserting it with the cone side facing out. The pressure washer should not be operated without this filter properly installed.
- Storage: For storage, especially for periods longer than 30 days or when freezing temperatures are expected, the manufacturer recommends adding Ethanol Shield™ fuel stabilizer to the gasoline and running the engine for 10 minutes. The fuel valve should then be turned off, and the engine run until it stops from lack of fuel in the carburetor. SIMPSON® / POWERWASHER® Pump Guard or equivalent should be used to lubricate internal pump seals. All water should be drained from the high-pressure hose, spray gun, and wand before storing.
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