OEM Technologies 90026 Vertical Axial Cam Replacement Pressure Washer Pump Kit Instruction Manual

Introduction

The OEM Technologies 90026 Axial Cam Pump is engineered for optimal performance and efficiency, designed to minimize engine load while delivering powerful cleaning capabilities. This replacement pump kit is specifically for gas pressure washers featuring a vertical engine and a 7/8-inch diameter shaft, compatible with models like the Honda GCV160/170. It is capable of producing up to 3100 PSI at 2.4 GPM, making it suitable for a wide range of residential and industrial cleaning tasks. The pump incorporates stainless steel pistons for enhanced seal life and an integrated unloader with an easy-start system for user convenience. Always verify your pressure washer's inlet and outlet orientation to ensure proper compatibility.

Key Features

• Extended Durability: A Thermal Relief Valve (TRV) protects the pump from overheating while in bypass mode. The TRV releases small amounts of hot water and intakes cooler water to prevent overheating and extend the life of the pump.
• Maintenance-Free Operation: This pump features a maintenance-free crankcase, eliminating the need for oil changes. It is manufactured from fully anodized die-cast aluminum for protection against corrosion, ensuring years of reliable use with your pressure washer accessories.
• Standard Connections: Equipped with a garden hose inlet and a threaded M22 connection high-pressure hose outlet, this replacement pump is compatible with many pressure washer hoses, including Simpson MorFlex models 40224, 40225, 40226, and Santoprene model 41182.
• Broad Compatibility: The SAE standard bolt pattern fits many gas pressure washers with vertical engines. For proper fit, ensure to match engine orientation, PSI, GPM, engine shaft diameter, and current pump inlet and outlet connection.
• Cost-Effective Solution: Extend the life of your existing pressure washer by replacing the pump instead of purchasing an entirely new unit. This easy-to-install kit is ideal for machines supporting 3100 PSI at 2.4 GPM for various cleaning applications.

What's Included

Your OEM Technologies 90026 Vertical Axial Cam Replacement Pressure Washer Pump Kit includes all necessary components for a straightforward installation:

• OEM Technologies Vertical Axial Cam Pump
• Mounting Hardware (nuts and bolts)
• Siphon Hose with Filter
• Shaft Key
• Instruction Booklet (User Manual)

Image: The complete OEM Technologies 90026 pump kit, showing the pump unit, three mounting bolts with nuts, a clear siphon hose with a black filter, and a small shaft key.

Installation Guide

Follow these steps carefully to replace your pressure washer pump. For a visual guide, refer to the official installation video below.

Step-by-Step Installation

1. Step 1: Ensure Engine is Off. Before beginning any work, confirm that the pressure washer engine is in the OFF position. This is a critical safety measure to prevent accidental starting.
2. Step 2: Remove Ignition Lead. Disconnect the ignition lead from the engine spark plug. This further ensures the engine cannot start during the pump replacement process.
3. Caution: Pump Bolted to Engine and Frame. Be aware that the pump is directly bolted to both the engine and the frame. The subsequent steps involve unbolting the engine and pump frame assembly. Exercise extreme caution to only remove the pump from under the frame. The engine could fall off the frame if tilted or mishandled.
4. Step 3: Empty/Clamp Soap Tank (If Applicable). If your unit has a soap tank, ensure it is empty or clamp the siphon hose to prevent soap from leaking during the process. Note that not all units are equipped with a soap tank.
5. Step 4: Remove Siphon Hose. Carefully detach the siphon hose from the pump.
6. Step 5: Remove Three Bolts. Locate and remove the three bolts that secure the pump to the frame and engine.
7. Step 6: Remove Pump. Once the bolts are removed, carefully detach the old pump from the frame and engine.
8. Step 7: Remove Old Key. Extract the old key from the engine shaft. If the key is not on the shaft, it might be inside the pump or may have fallen off when the pump was removed.
9. Step 8: Remove Engine Key Retaining Ring (If Applicable). If your engine utilizes an engine key retaining ring, remove it from the engine shaft. Some pressure washer engines do not use this component.
10. Step 9: Align Keyway. Slowly pull the recoil starter to turn the engine shaft until the keyway is facing you. This ensures proper alignment for the new pump.
11. Step 10: Reinstall Engine Key Retaining Ring (If Applicable). If you removed an engine key retaining ring in Step 8, reinstall it onto the engine shaft.
12. Step 11: Place New Shaft Key. Insert the new shaft key, provided with your pump kit, into the keyway of the engine shaft.
13. Step 12: Apply Anti-Seize. Apply a light coating of anti-seize compound on the engine shaft and the new key. This helps prevent corrosion and makes future removal easier.
14. Step 13: Align and Install New Pump. Carefully align the two keyways (on the shaft and inside the pump) and push the new pump completely onto the engine shaft until it is fully seated against the engine.
15. Step 14: Insert New Bolts and Nuts. Insert the new bolts and nuts (provided in the kit) to secure the pump to the frame and engine. Torque them to the manufacturer's recommended specifications.
16. Step 15: Reconnect Siphon Hose. Reconnect the siphon hose to the pump.
17. Step 16: Reconnect Ignition Lead. Finally, place the ignition lead back onto the spark plug.

Image: The complete OEM Technologies 90026 pump kit, ready for installation.

Image: Detailed diagram highlighting the pump's features and connection points, such as the thermal relief valve, 3/4" Garden Hose Inlet, M22 High-Pressure Outlet, Unloader, and Chemical Injection Capable port.

Image: A visual guide providing essential tips for selecting the correct replacement pump, emphasizing the importance of matching engine orientation (horizontal vs. vertical), PSI and GPM ratings, engine shaft diameter, and the type of pump outlet connection (threaded M22 or Quick Connect).

Operating Your Pressure Washer Pump

Once the new pump is installed, your pressure washer is ready for operation. Always refer to your pressure washer's main owner's manual for specific starting procedures and safety guidelines.

General Operating Tips:

• Water Supply: Connect a garden hose to the pump's inlet and ensure a steady, adequate water supply before starting the engine.
• High-Pressure Hose: Connect your high-pressure hose to the pump's outlet.
• Starting: Follow your pressure washer engine's starting instructions. Allow water to flow through the pump and hose to purge air before engaging the spray gun.
• Pressure Adjustment: If your unit has an adjustable unloader, you can manage the pressure for different cleaning projects.

Maintenance

The OEM Technologies 90026 pump is designed for minimal maintenance, featuring a maintenance-free crankcase that does not require regular oil changes. However, proper care is essential to prolong its lifespan.

Pump Care:

• Thermal Relief Valve (TRV): The integrated TRV protects the pump from overheating. Ensure it is not obstructed and functions correctly.
• Storage: When storing the unit for more than 30 days or when freezing temperatures are expected, it is crucial to winterize the pump.

Winter Storage Recommendations:

• Disconnect the high-pressure hose from the pump and spray gun, allowing water to drain or using high-pressure air to force water out.
• Hold the spray gun and wand vertically and squeeze the trigger to remove any remaining water.
• Use SIMPSON Pump Guard (or an equivalent pump protector) to lubricate internal seals and remove water, preventing damage from freezing. Follow the instructions on the Pump Guard product for proper application.

Image: A can of Simpson Pressure Washer Pump Guard, recommended for winterization and pump protection.

Image: Visual instructions on how to apply Pump Guard to your pressure washer pump for storage, illustrating the connection and dispensing process.

Troubleshooting

This section addresses common questions and issues related to pressure washer pumps. For more complex problems, consult a qualified service technician.

Q: How do I ensure compatibility with my pressure washer?

A: To ensure compatibility, match your pressure washer's engine orientation (vertical), PSI, GPM, engine shaft diameter (7/8"), and current pump inlet and outlet connections. The OEM Technologies 90026 is designed for vertical engines.

Q: What are the power features of this pump?

A: This pump is designed to produce up to 3100 PSI at 2.4 GPM. It features a stainless steel integrated unloader with an easy-start system for efficient operation.

Q: What makes this pump maintenance-free?

A: The pump contains long-wear components submerged in a high-grade synthetic oil, designed to last the life of the pump. This eliminates the need for regular oil changes, making it maintenance-free.

Q: What is a Thermal Relief Valve (TRV) and why is it important?

A: A TRV is a safety feature that prevents the pump from overheating while in bypass mode. If the water temperature inside the pump gets too hot, the TRV opens, allowing hot water to exit and cooler water to enter the pump, thus protecting it from damage.

Technical Specifications

Warranty and Customer Support

Warranty Information:

The OEM Technologies 90026 Vertical Axial Cam Pump Kit comes with a 2-year warranty. Please retain your proof of purchase for any warranty claims.

Additional Resources:

• For a comprehensive user manual in PDF format, please refer to the official document: OEM Technologies User Manual (PDF)

Customer Support:

For further assistance, technical support, or warranty inquiries, please contact SIMPSON customer service. Refer to the contact information provided in your included instruction booklet or visit the official SIMPSON website.