Stens Pressure Washer Pump Oil (Model 758-115) Instruction Manual

1. Product Overview

This manual provides essential information for the proper use and maintenance of Stens Pressure Washer Pump Oil, Model 758-115. This product is a high-quality, 30-weight, non-detergent oil specifically formulated for pressure washer pumps to ensure optimal performance and longevity.

Each purchase includes six 16-ounce bottles of pump oil, designed to meet the lubrication requirements of various pressure washer pump models, including those manufactured by General Pump.

Image 1.1: A bottle of Stens Pressure Washer Pump Oil. This oil is a 30-weight, non-detergent lubricant essential for maintaining pressure washer pump health.

2. Safety Information

General Safety Precautions

• Always read and understand the pressure washer's owner's manual before performing any maintenance.
• Wear appropriate personal protective equipment, including safety glasses and gloves, when handling pump oil.
• Avoid prolonged skin contact with used oil. Wash hands thoroughly after handling.
• Do not ingest pump oil. If swallowed, seek immediate medical attention.
• Keep out of reach of children and pets.
• Store oil in a cool, dry place, away from open flames or heat sources.
• Dispose of used oil responsibly according to local environmental regulations. Do not pour into drains or onto the ground.

Proposition 65 Warning

This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

3. Setup and Preparation

Before You Begin

Before changing the pump oil, ensure the pressure washer is turned off, disconnected from its power source (if electric) or spark plug wire removed (if gas-powered), and completely depressurized. Allow the pump to cool down if it has been recently operated.

Required Tools and Materials

• Stens Pressure Washer Pump Oil (Model 758-115)
• Drain pan or suitable container for used oil
• Wrench or socket set (to remove drain and fill plugs)
• Funnel (optional, for easier filling)
• Clean rags

Identifying Pump Oil Plugs

Locate the oil drain plug, typically at the bottom of the pump housing, and the oil fill plug, usually on the side or top. Some pumps may have a sight glass to indicate the oil level.

4. Operating Instructions: Pump Oil Change Procedure

Follow these steps to properly change the oil in your pressure washer pump:

1. Position the Pressure Washer: Place the pressure washer on a level surface. Position the drain pan directly beneath the pump's oil drain plug.
2. Remove Drain Plug: Using the appropriate wrench, carefully remove the oil drain plug. Allow all the old oil to drain completely into the pan. This may take several minutes.
3. Inspect and Replace Drain Plug: Once the oil has fully drained, clean the drain plug and its threads. Replace the drain plug, ensuring it is securely tightened to prevent leaks. Do not overtighten.
4. Remove Fill Plug: Locate and remove the oil fill plug. If your pump has a sight glass, note its location.
5. Fill with New Oil: Slowly pour the Stens Pressure Washer Pump Oil (Model 758-115) into the fill opening using a funnel if necessary. Fill the pump to the level indicated by the manufacturer, typically to the center of the sight glass or to the 'FULL' mark on a dipstick. Do not overfill.
6. Replace Fill Plug: Once the correct oil level is reached, replace the oil fill plug and tighten it securely.
7. Clean Up: Wipe away any spilled oil from the pump and surrounding areas.

Image 4.1: A close-up view of internal engine components, illustrating the intricate machinery that requires proper lubrication. The pressure washer pump operates similarly and requires specific oil for optimal function.

5. Maintenance

Recommended Oil Change Intervals

Regular oil changes are crucial for the longevity and performance of your pressure washer pump. Consult your pressure washer's owner's manual for specific recommendations. A general guideline is to change the pump oil:

• After the first 50 hours of operation (break-in period).
• Every 100-200 hours of operation thereafter, or at least once per year, whichever comes first.

Checking Oil Level

Periodically check the pump oil level before each use. Ensure the oil level is within the recommended range, typically visible through a sight glass or marked on a dipstick. Add Stens Pressure Washer Pump Oil if the level is low.

Proper Storage

When storing your pressure washer for extended periods, ensure the pump oil level is correct. Storing the unit with proper lubrication helps prevent internal corrosion and wear.

6. Troubleshooting Common Oil-Related Issues

Low Oil Level

• Symptoms: Pump overheating, reduced pressure, unusual noises.
• Solution: Check oil level and add Stens Pressure Washer Pump Oil to the correct level. Inspect for leaks.

Contaminated Oil

• Symptoms: Oil appears milky (water contamination), very dark/black (excessive wear or overdue change), or has a strong burnt smell.
• Solution: Immediately drain and replace with fresh Stens Pressure Washer Pump Oil. Investigate the cause of contamination (e.g., seal leaks for water, excessive heat for burnt oil).

Pump Overheating

• Symptoms: Pump housing is excessively hot to the touch, automatic shut-off (if equipped).
• Solution: Ensure proper oil level and condition. If oil is correct, other factors like prolonged bypass operation or restricted water flow may be contributing.

7. Specifications

8. Disposal Information

Used motor oil and pump oil are hazardous waste and must be disposed of properly. Do not dispose of used oil in household trash, down drains, or onto the ground. Many automotive service centers, recycling facilities, and municipal waste collection sites accept used oil for recycling. Contact your local waste management authority for information on proper disposal and recycling options in your area.