A pressure washer helps to clean your house’s external areas and objects easily. It saves a lot of time. Proper maintenance of the machine is required to enjoy its benefits for a long time. One of the critical parts to check is the pump oil. The pump does not have an oil filter, so it needs to be replaced before it gets too dirty.
In general, most pressure washers use around 5 oz of pump oil. This means a single pump oil bottle is enough for an oil change. Most pumps use non-detergent crude, as the pump has no oil filter. Regularly check the oil quality. Replace when needed. Some more budget-friendly pressure washers have a sealed pump, where oil can not be replaced.
Checking and replacing the pressure washer oil is something that many owners forget. They focus more on the gas engine than the pump. This article will provide you with information about the oil quantity that goes in a pressure washer pump. I will also show you how to check and replace the pump oil.
Contents
- 1 Oil type and quantity to be used in a pressure washer pump
- 1.0.1 Over the years, I’ve found that non-detergent oils rated SAE 30 work best for pressure washer pumps. However, always check the manufacturer’s guidelines to be sure.
- 1.0.2 In my experience, signs that the oil needs to be changed include dirty or dark oil, decreased performance, or unusual noises from the pump. These are clear indicators that it’s time for a change.
- 2 How do you check if the pressure washer pump oil is okay?
- 3 How do you check the premium pump oil level?
- 4 What do you do if you do not know how much pump oil is needed?
- 5 What type of oil should be used in a pressure washer pump?
- 6 How do you change the oil in the pressure washer pump?
Oil type and quantity to be used in a pressure washer pump
The following table shows the different types of oils that can be used with other pressure washer pumps. It will also indicate the amount of oil required for the particular pump.
Pump Type | Oil Type | Oil Capacity |
|---|---|---|
Many Karcher types | Non-detergent 15W 40 oil | 4 oz |
CAT 310 – 6105 crankcase | 2.5 gallon | |
Many CAT types | Non-detergent 30W oil | Pour according to the sight glass |
DAPC (Axial) | R & O 150 oil | 8 oz |
Mant Faip types | Synthetic 15W 50 oil | 4 oz |
Giant (HR series) | Synthetic 20W 50 | 4.5 oz |
Giant (P316) | Synthetic 20W 50 | 17 oz |
Giant (P303) | Synthetic 20W 50 | 14 oz |
General | Non-detergent 30W | 4 oz |
Annovi Reverberi RKV | Non-detergent 30W | 18.54 oz |
Annovi Reverberi XMV | Non-detergent 30W | 13.5 |
Annovi Reverberi XTV | Non-detergent 30W | 9.92 oz |
Pump Type | Oil Type | Oil Capacity |
|---|---|---|
Annovi Reverberi XJV | Synthetic Shell Spyrex 75W 90 Synthetic 20W 40 | 5.25 oz |
Axial Comet BXD2528G | non-detergent | 2,2 oz (65 ml) |
Axial AR RMV 25G30D | non-detergent | 2,2 oz (65 ml) |
Many Stihl pressure washers | non-detergent | 3 oz |
Craftsman Pressure Washer, Model 580.767300. | Less than 5 oz | |
GX series Crankcase Oil Capacity | Mobile 1 20W 50 Full Synthetic | 4.1 fl. oz. (121 ml) |
Cat 3FR Piston | ISO 68 high-pressure hydraulic pump oil | 10 Ounces (0.30 Liters) |
Cat 4FR Piston | ISO 68 high-pressure hydraulic pump oil | 21 Ounces (0.62 Liters) |
Cat 5FR Piston | ISO 68 high-pressure hydraulic pump oil | 21 Ounces (0.62 Liters) |
Cat 10FR Piston | ISO 68 high-pressure hydraulic pump oil | 40 Ounces (1.18 Liters) |
Cat 25FR Piston | ISO 68 high-pressure hydraulic pump oil | 84 Ounces (2.48 Liters) |
Cat 60FR Piston | ISO 68 high-pressure hydraulic pump oil | 321.2 Ounces (9.50 Liters) |
Over the years, I’ve found that non-detergent oils rated SAE 30 work best for pressure washer pumps. However, always check the manufacturer’s guidelines to be sure.
Pump Type | Oil Type | Oil Capacity |
|---|---|---|
Cat 3FR Plunger | ISO 68 high-pressure hydraulic pump oil | 15 Ounces (0.44 Liters) |
Cat 5FR Plunger | ISO 68 high-pressure hydraulic pump oil | 18 Ounces (0.53 Liters) |
Cat 7FR, 8FR Plunger | ISO 68 high-pressure hydraulic pump oil | 25 Ounces (0.74 Liters) |
Cat 15FR, 18FR Plunger | ISO 68 high-pressure hydraulic pump oil | 42.6 Ounces (1.26 Liters) |
Cat 25FR, 28FR Plunger | ISO 68 high-pressure hydraulic pump oil | 84 Ounces (2.48 Liters) |
Cat 35FR, 38FR Plunger | ISO 68 high-pressure hydraulic pump oil | 134.4 Ounces (3.97 Liters) |
Cat 60FR, 68FR Plunger | ISO 68 high-pressure hydraulic pump oil | 321.2 Ounces (9.50 Liters) |
Cat 150FR Plunger | Cat Pumps ISO 100 special formula premium grade | 22.4 gallon (85.00 Liters) |
Cat 1CX Plunger | ISO 68 high-pressure hydraulic pump oil | 2.03 Ounces (0.06 Liters) |
Pump Type | Oil Type | Oil Capacity |
|---|---|---|
Cat 1DX Series | ISO 68 high-pressure hydraulic pump oil | 8.5 Ounces (0.25 Liters) |
Cat 2DX Series | ISO 68 high-pressure hydraulic pump oil | 8.5 Ounces (0.25 Liters) |
Cat 2SF, 2SFX Series | ISO 68 high-pressure hydraulic pump oil | 10.1 Ounces (0.30 Liters) |
Cat 2SFSEEL Series | ISO 68 high-pressure hydraulic pump oil | 10.1 Ounces (0.30 Liters) |
Cat 2SFQSEEL Series | ISO 68 high-pressure hydraulic pump oil | 10.1 Ounces (0.30 Liters) |
Cat 2SFP Series | ISO 68 high-pressure hydraulic pump oil | 10.1 Ounces (0.30 Liters) |
Cat 3DX, 3DNX Series | ISO 68 high-pressure hydraulic pump oil | 8.5 Ounces (0.25 Liters) |
Cat 3SP, 3SPX Series | ISO 68 high-pressure hydraulic pump oil | 10.15 Ounces (0.30 Liters) |
Cat 4DX, 4DNX Series | ISO 68 high-pressure hydraulic pump oil | 8.5 Ounces (0.25 Liters) |
Cat 4DX03ELR | ISO 68 high-pressure hydraulic pump oil | 8.5 Ounces (0.25 Liters) |
In my experience, signs that the oil needs to be changed include dirty or dark oil, decreased performance, or unusual noises from the pump. These are clear indicators that it’s time for a change.
Pump Type | Oil Type | Oil Capacity |
|---|---|---|
Cat 4HP Series | ISO 68 high-pressure hydraulic pump oil | 22.6 Ounces (0.67 Liters) |
Cat 4SF Series | ISO 68 high-pressure hydraulic pump oil | 23.66 Ounces (0.70 Liters) |
Cat 4SP, 4SPX Series | ISO 68 high-pressure hydraulic pump oil | 10.1 Ounces (0.30 Liters) |
Cat 5DX Series | ISO 68 high-pressure hydraulic pump oil | 22.6 Ounces (0.67 Liters) |
Cat 5SP Series | ISO 68 high-pressure hydraulic pump oil | 13.5 Ounces (0.40 Liters) |
Cat 6DX Series | ISO 68 high-pressure hydraulic pump oil | 22.6 Ounces (0.67 Liters) |
Cat 66DX Series | ISO 68 high-pressure hydraulic pump oil | 18 Ounces (0.53 Liters) |
Cat 67DX Series | ISO 68 high-pressure hydraulic pump oil | 13.5 Ounces (0.40 Liters) |
Cat 3CP Plunger | ISO 68 high-pressure hydraulic pump oil | 12 Ounces (0.35 Liters) |
Cat 5CP Plunger | ISO 68 high-pressure hydraulic pump oil | 17 Ounces (0.50 Liters) |
Cat 7CP Plunger | ISO 68 high-pressure hydraulic pump oil | 38.9 Ounces (1.15 Liters) |
How do you check if the pressure washer pump oil is okay?
To check if the oil in the industrial pressure washer pump is in good health, drain some of the oil. Or put a thin, clean iron strip in the oil tank so that the oil sticks to the strip. Check the extracted oil or oil sticking to the strip.
Compare the color of the oil with the fresh oil. If the oil is milky or has any visible particles, it means it is dirty, and you must change it.
Very thin, less dense, or less viscous oil also indicates a need for an oil change. If the oil is not too light or milky, you can continue to use it. This process is recommended for everyday use.
To check the quality of the oil in the pressure washer pump, you need to test the oil. For this purpose, you can drain a small amount of oil in a container by removing the drain plug and securing the pin after getting a sample.
Another way to check the oil is to put a thin strip inside the tank from the top to submerge it in the oil. Take the strip out and check the oil with your fingers. This process is essential for maintaining the high-pressure pumps.
After getting a sample of the oil, check for the following:
● Check pump oil quality: Color
The color of the oil indicates its health. When the oil is used over a long time, it gets dark. If your pump oil is too opaque or milky, replace it. The oil change price may vary depending on the items included in the service package.
● Check pump oil quality: Thickness
Fresh oil is relatively thicker than used oil. Thickness can be taken as a measure to determine the oil’s health. Oil gets thinner when it gets hot. When the oil is used for an extended period, it becomes fragile and flows like water.
If the oil in your pump is fragile or has less viscosity, it means that the oil’s life span is over, and your pump needs an oil change. To make it easier, compare it with some fresh to-premium pump oil.
● Check pump oil quality: Visible particles
Another indicator of a dirty oil change is visible particles. A pressure washer pump does not have an oil filter, like a gas engine, that filters dirt. If you see any particles by rubbing the oil between your fingers, it shows that it is dirty and must be replaced. Please note that additional shipping charges may apply.
Remember, regular pressure washer pump maintenance can extend its lifespan to 24 months or more. Always use the recommended oil for your pump and change it as per the manufacturer’s guidelines. For more information, you can contact Ultimate Washer Inc.
How do you check the premium pump oil level?
Premium pump oil is known for its optimal viscosity. Even when used long, premium pump oil maintains its thickness better than regular oil.
This means your pump can operate more efficiently and for longer before needing an oil change. To check the viscosity of your premium pump oil, compare it with some fresh premium pump oil.
Before checking the oil level, it is essential to read the owner’s manual and work out the proper oil levels for your pressure washer. Inspect the pump and locate the viewing glass.
Generally, a small red dot in the center or two parallel lines indicates the proper oil level. The dot represents that the oil in the pump should be up to that level.
The parallel lines indicate that the correct oil level is in between the parallel lines. This is the best way to ensure the oil pressure is optimal.
– The Importance of Knowing Your Specific Model
Some pumps, like those in some Honda models, are pre-lubricated and sealed from the factory. Wobble and axial piston pumps fall into this category.
These pumps require no oil maintenance for their whole life. If the owner’s manual does not say anything about an oil change, I recommend first checking which pump type is used in your pressure washer.
Use this to find information about how to check the oil level. This is the solution for maintaining the Total health of your machine.
If your pump is pre-lubricated and sealed from the factory, you can not check the oil level or change the oil. This is why knowing how to maintain your specific model is so important.
In my two decades of gardening, I’ve learned that the oil in a pressure washer pump should be changed every 50-100 hours. This frequency ensures optimal performance and longevity of the machine.
What do you do if you do not know how much pump oil is needed?
If you do not know how much pump oil is needed in your pump, check the owner’s manual. If you still can not find it, I recommend using 3/4th of the pump oil bottle while refilling it. Overfilling the oil tank may damage the pump and cause problems.
Generally, pressure washer pumps have a sight glass through which you can see the oil level inside the pump. The mark on the sight glass indicates the highest and lowest oil levels. The owner’s manual also mentions the type and oil quantity the pump needs.
If you have found the correct quantity of oil required for your pump, refill the oil from the pump oil bottle accordingly.
If you cannot locate the sight glass or if there is not any or there is no information about the oil quantity in the owner’s manual, slowly add oil. Give the oil time to flow to other parts of the pump when you notice that you have added too much.
Stop immediately. If you can, remove it a little bit. You can use an oil suction tool for this. Let the pump work for a short while, and check again.
What type of oil should be used in a pressure washer pump?
In general, use the manufacturer-recommended oil. If you can not find it, use a 30W non-detergent oil for your pressure washer pump. Non-detergent oils contain additional additives and prevent residue build-up inside the pump. Pressure washer pumps do not have an oil filter, like gas engines, that cleans the oil.
The pressure washer companies often mention the type of oil in the owner’s manual. I always recommend using that type. Generally, manufacturers use their own branded oil products that are compatible with their pressure washers.
If you do not know the type of oil, you should use non-detergent oil in your pressure washer pump. Here are some tips that will help you to find the appropriate bottle of oil for your machine:
- ND: The oil bottle will have an “ND” designation. “ND” stands for Non-detergent.
- Non-detergent: The word “Non-detergent” might be written right on the bottle.
- Pump oil: Many brands write “Pump oil” on their bottles.
– Comparing the Viscosity of SAE-10 and SAE-40 Oils
The main difference between pump oil and motor oil is their additives. Pump oil contains silicon compounds as a non-foaming agent. Motor oil contains magnesium sulfonate additives. Most pressure washer pumps use SAE 10W-30 or SAE 10W-40 oil.
These designations, i.e., SAE 10W-30, show the oil’s viscosity. A liquid’s viscosity is its resistance to flow. High viscosity means high resistance, and vice versa. The viscosity of the oil depends on temperature. The oil gets thinner as it gets hot.
At the same temperature, SAE-10 oil has less viscosity than SAE-40 oil. 10W 30 designates a multi-viscosity oil. It means the oil performs like SAE 10 at low temperatures and SAE-40 at high temperatures. A multi-viscosity oil is not required in hot areas where it does not get cold enough, i.e., Florida.
How do you change the oil in the pressure washer pump?
To change the oil in the pressure washer pump, first, remove the contaminants in the pump. Drain the old oil through the drain plug/bolt or use a suction gun. After draining it completely, secure the drain plug and refill the fresh oil in the pump.
Before changing the oil in the pressure washer pump, I always recommend checking the type of pump used in your pressure washer.
Read the owner’s manual and check for any oil change instructions. Most budget-friendly electric pressure washer pumps are pre-lubricated and sealed at the factory. You can not change the oil in these pumps.
Most wobble and axial piston pumps do not require additional maintenance throughout their life. These pumps are also sealed and cannot change the pump oil or check the oil level.
Always read the owner’s manual carefully and check for any instructions regarding oil changes. Suppose you do not find any information regarding oil change or pump maintenance. And no drain plug and fill cap means that your pump is pre-lubricated from the factory and does not require any oil change.
Changing the oil in the pressure washer pump is simple and is needed to keep your washer working well. Here are three simple steps to change the oil in the pressure washer pump.
Step 1: Remove the contaminants from the pump
The first step while changing the oil in the pump is to clear all the contaminants and pollutants in the pump. For this purpose, remove the wand and turn on the water supply. Start the engine as you usually do for a cleaning job. Produce a steady water spray for 2 to 3 minutes.
Step 2: Drain the old oil
Once you have removed the contaminants, the next step is to drain the old oil from the pump. You can extract the oil in the pump through the oil drain plug at the bottom. Or using an oil suction tool.
If you have a gas-powered pressure washer, I recommend draining the gas first. Use a wrench to remove the drain plug. Allow the old oil to drain away in a container. Tilt the unit to drain the oil completely.
If you want to suction out the old oil, open the oil cap and insert the suction tool hose into the oil tank. The suction tool will take out the old oil. Always remember to secure the drain plug back to its place once the oil is drained completely.
Step 3: Refill the oil tank
After draining the old oil, refill the pump tank with fresh, good, high-quality oil. Check the owner’s manual to know the type of oil and the right amount. Open the oil cap and pour the new oil into the pump. Make sure to clean any oil drops or spillages after adding it.
What are the consequences of using the wrong type of oil in a pressure washer pump?
Remember, using the wrong type of oil in a pressure washer pump can cause damage and reduce its lifespan. Always refer to the manufacturer’s guidelines and replace the oil as needed.
I didn’t even know pressure washers have pump oil that needs to be replaced.
I’m glad you found the information helpful! Regular maintenance is key to making your pressure washer last. Don’t hesitate to reach out with any more questions.
I never knew how important it is to maintain the pump oil in a pressure washer. This is very informative.
Thank you for your feedback, Candice! Regularly maintaining the pump oil is crucial to the longevity of your pressure washer. I’m glad you found the information helpful.
Is it possible to overfill the pump oil?
The pump oil level should be checked regularly to avoid overfilling. Most pressure washers need around 5 oz of oil, so using a single pump oil bottle is sufficient. Regular oil checks are essential.
Can I use regular motor oil in a pressure washer pump if I don’t have pump oil?
It is not recommended to use regular motor oil in a pressure washer pump. It is best to use the manufacturer-recommended oil to ensure proper functioning and longevity of your pump.
I will definitely follow the steps mentioned in the article to change my pressure washer pump oil.
Thank you, Myrtle! Proper maintenance is key for the longevity of your pressure washer pump. Remember to check and change the oil regularly to keep it running smoothly. Enjoy your clean outdoor spaces!
After reading this, I realized how crucial it is to maintain the pump oil in my pressure washer regularly.
Thank you, Sarah! Proper maintenance of your pressure washer pump oil is indeed vital for its performance and longevity. I’m glad you found the information helpful.
How do I properly dispose of the old pump oil?
To dispose of old pump oil, seal it in a leak-proof container and take it to a hazardous waste disposal center. Never pour it down the drain or throw it in the trash.
I will make sure to check my pump oil regularly from now on. Thanks for the tips!
Glad you found the tips helpful! Regular pump oil checks are key. Happy cleaning!
Thank you for providing such detailed information on pump oil for pressure washers.
Thank you for your feedback, Brandy! I’m glad you found the information on pump oil for pressure washers helpful. Let me know if you have any more questions.
Can I use any type of oil in a pressure washer pump?
Yes, you can use non-detergent 30W oil for most pressure washer pumps. Make sure to check the oil quality regularly and replace it when needed. Enjoy your clean space!
This article has answered many questions I had about pressure washer maintenance.
Thank you for your comment, Camila! I’m glad the article was helpful in answering your questions about pressure washer maintenance. If you have any more questions, feel free to ask!
This was very helpful. I have been neglecting the pump oil in my pressure washer.
I’m glad you found the information helpful! Regular pump oil maintenance is key to keeping your pressure washer working efficiently. Don’t forget to replace it when needed.
This article is a lifesaver. I had no idea about the importance of pump oil for pressure washers.
Thank you for your feedback, Sean! I’m glad the article was helpful. Regular pump oil checks are crucial for maintaining your pressure washer’s efficiency and longevity.
What happens if I don’t change the pump oil regularly?
Regularly changing the pump oil is crucial for maintaining your pressure washer’s functionality. Dirty oil can damage the pump. Always keep an eye on the oil quality to avoid expensive repairs.
How often should I check the pump oil in my pressure washer?
For most pressure washers, replace pump oil every 3 to 6 months to keep your machine running smoothly. Consult your owner’s manual for the correct oil type and quantity.
I will take better care of my pressure washer pump after reading this article.
Thank you for sharing! Proper maintenance is key to getting the most out of your pressure washer pump. Happy cleaning!
Very insightful article, I never realized how crucial it is to maintain the pump oil in a pressure washer.
Thank you for your feedback, Sofia! Regularly maintaining the pump oil in a pressure washer is essential for efficient performance and prolonging its lifespan. Have a great day!
I always focus on the gas engine of my pressure washer, never thought about the pump oil before.
Thank you for sharing, Tracy. It’s essential to focus on pump oil maintenance too to keep your pressure washer working efficiently. Regular oil checks are key.
I appreciate the detailed information on the different oil types for each pump. Very helpful.
Thank you for the positive feedback, Sharlene! I’m glad you found the information on different oil types for pressure washer pumps helpful. Happy cleaning!