YAMATIC OEM PRESSURE WASHER PUMP

TECHNICAL SPECIFICATION

INSTALLATION DIRECT DRIVE PUMPS

1. Install the shaft key into the keyway and apply a light coating of anti-seize on the engine shaft.
2. Align the two key ways and push the pump completely onto the engine.
3. Install all bolts and tighten evenly.
4. Remove protection cap of outlet and unloader valve.
5. Install the appropriate water inlet fitting (3/4"-11.5 NH).
6. Connect the water supply hose and outlet (M22x1.5-14 Hose or adapter) and high-pressure discharge hose/spray gun.
7. Turn on the water supply.
8. Open the spray gun to purge the system of any air.
9. Start the engine.
10. Adjust the engine speed at rated 3,400 RPM will get best performance.
11. Open gun trigger check if pump is working well and installation and connection are all good.

NOTE: Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Retain instructions for future reference.

GENERAL SAFETY INFORMATION

• The pump is designed to pump non-flammable or non-explosive fluids. These pumps are intended to pump clean filtered water only.
• Do not operate in or around an explosive environment.
• Always wear safety glasses or goggles and appropriate clothing.
• Do not allow children to operate the pump.
• Never point the high-pressure discharge at a person, any part of the body or animals.
• Do not operate gasoline engines in a confined area and always have adequate ventilation.
• Do not exceed the pump specifications in speed or pressure.
• Do not alter the pump from the manufacturers design.

Assembly drawing for HORIZONTAL Pump

Diagram showing the horizontal pump assembly with dimensions. Key components labeled include the pump code label and the M22 x 1.5 connection.

Assembly drawing for REAR SIDE INLET VERTICAL Pump

Diagram showing the rear side inlet vertical pump assembly with dimensions. Key components labeled include the pump code label and the M22 x 1.5 connection.

Assembly drawing for FRONT SIDE INLET VERTICAL Pump

Diagram showing the front side inlet vertical pump assembly with dimensions. Key components labeled include the pump code label and the M22 x 1.5 connection.

NOTE: If the inlet/outlet is blocked by the front frame cover, please modify or remove the front frame cover to provide good clearance for the high pressure outlet connection.

Washer Bolt for VERTICAL Pump

Diagram showing washer bolt details for the vertical pump.

TIPS: When your engine shaft length is longer from the engine flange (PTO) to the shaft end, when you set up the engine shaft and pump, you will find the gap between the pump boss and the engine bottom or flange. Then you need to put the washer into the gap, between your original engine flange and pump boss, then screw up the bolt for some engines, need washers for all three pump bosses.

OPERATION TIPS

Water Supply:

1. Make sure the water supply is clean. Debris can cause excess pump wear and reduce performance.
2. An insufficient water supply will damage your pump. Make sure the water supply is steady and is 20% over the rated flow of your pump. Use a stopwatch to time how long it takes to fill a 5-gallon bucket with your garden hose.
3. The water supply garden hose must have an inside diameter of at least 5/8". If the hose is more than 100 ft. long, the diameter must be at least 3/4".
4. Never use a reservoir tank as a water source. Drawing water out of a tank may cause pump cavitation and damage to your pump. This pressure washer is designed for a pressurized water source such as a city water faucet. However, the water source pressure must not exceed 115 psi (8 bar). Always use a flexible rubber hose for your water supply. Do not use rigid piping.

TROUBLESHOOTING GUIDE